RING finger, HC subclass, found in Mus musculus tripartite motif-containing protein 43 (TRIM43) and similar propteins; This subfamily includes TRIM43A, TRIM43B and TRIM43C, which are expressed specifically in mouse preimplantation embryos. They contain a typical C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 295390679  11 EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRYIND 67
Cdd:cd23133    1 EETLTCSICQGIFMNPVYLRCGHKFCEACLLLFQEDIKFPAYCPMCRQPFNQEYIND 57

B-box-type zinc finger superfamily; The B-box-type zinc finger is a short zinc binding domain of around 40 amino acid residues in length. It has been found in transcription factors, ribonucleoproteins and proto-oncoproteins, such as in TRIM (tripartite motif) proteins that consist of an N-terminal RING finger (originally called an A-box), followed by 1-2 B-box domains and a coiled-coil domain (also called RBCC for Ring, B-box, Coiled-Coil). The B-box-type zinc finger often presents in combination with other motifs, like RING zinc finger, NHL motif, coiled-coil or RFP domain in functionally unrelated proteins, most likely mediating protein-protein interactions. Based on different consensus sequences and the spacing of the 7-8 zinc-binding residues, B-box-type zinc fingers can be divided into two groups, type 1 (Bbox1: C6H2) and type 2 (Bbox2: CHC3H2).

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 295390679  87 NSEEHKCVTHKAKKMIFCDKSKILLCHLCSDSQEHSGHTHCSIDVAVQEKMEE 139
Cdd:cd19783    1 SSEEQICGTHRETKKLFCEADKSLLCLLCSSSQEHRAHRHYPIEWAAEEHREK 53

RING finger, HC subclass, found in Mus musculus tripartite motif-containing protein 43 (TRIM43) and similar propteins; This subfamily includes TRIM43A, TRIM43B and TRIM43C, which are expressed specifically in mouse preimplantation embryos. They contain a typical C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 295390679  11 EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRYIND 67
Cdd:cd23133    1 EETLTCSICQGIFMNPVYLRCGHKFCEACLLLFQEDIKFPAYCPMCRQPFNQEYIND 57

B-box-type 2 zinc finger found in tripartite motif-containing proteins TRIM43, TRIM48, TRIM49, TRIM51, TRIM64, TRIM77 and similar proteins; The family includes a group of closely related uncharacterized tripartite motif-containing proteins, TRIM43, TRIM43B, TRIM48/RNF101, TRIM49/RNF18, TRIM49B, TRIM49C/TRIM49L2, TRIM49D/TRIM49L, TRIM51/SPRYD5, TRIM64, TRIM64B, TRIM64C, and TRIM77, whose biological functions remain unclear. TRIM49, also known as testis-specific RING-finger protein, has moderate similarity with SS-A/Ro52 antigen, suggesting it may be one of target proteins of autoantibodies in the sera of patients with these autoimmune disorders. All family members (except for TRIM51) belong to the C-IV subclass of TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a RING finger, Bbox2, and a coiled coil region, as well as a SPRY/B30.2 domain positioned C-terminal to the RBCC domain. TRIM51 belongs to unclassified TRIM (tripartite motif) family of proteins that do not have RING fingers. The type 2 B-box (Bbox2) zinc finger is characterized by a CHC3H2 zinc-binding consensus motif.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 295390679  87 NSEEHKCVTHKAKKMIFCDKSKILLCHLCSDSQEHSGHTHCSIDVAVQEKMEE 139
Cdd:cd19783    1 SSEEQICGTHRETKKLFCEADKSLLCLLCSSSQEHRAHRHYPIEWAAEEHREK 53

SPRY domain; SPRY Domain is named from SPla and the RYanodine Receptor and it is found in many eukaryotic proteins with a wide range of functions. It is a protein-interaction module involved in many important signalling pathways like RNA processing, regulation of histone H3 methylation, innate immunity or embryonic development. It can be divided into 11 subfamilies based on amino acid sequence similarity or the presence of additional protein domains. The greater SPRY family is divided into the SPRY/B30.2 (which contains a PRY extension at the N-terminal) and SPRY-only sub-families which are preceded by a subdomain that is structurally similar to the PRY region. SPRY/B30.2 structures revealed a bent beta-sandwich fold comprised of two beta-sheets. Distant homologs are domains in butyrophilin/ marenostrin/pyrin.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679  337 KYYWEVDLkDYRR---WTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKDHYILITRIGREHYIEKPVGQVGVFLDCEGGY 413
Cdd:pfam00622   1 RHYFEVEI-FGQDgggWRVGWATKSVPRKGERFLGDESGSWGYDGWTGKKYWASTSPLTGLPLFEPGDVIGCFLDYEAGT 79

                          90       100       110
                  ....*....|....*....|....*....|
gi 295390679  414 VSFVDVAKsSLILSYSPGTFHCAVRPFFFA 443
Cdd:pfam00622  80 ISFTKNGK-SLGYAFRDVPFAGPLFPAVSL 108

RING-finger-containing E3 ubiquitin ligase [Posttranslational modification, protein turnover, chaperones];

                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 295390679   2 ESDNLQDPQ------EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEdIKFPAYCPTCRQPCNQRYIN 66
Cdd:COG5574  198 TKENLSKKNglpfipLADYKCFLCLEEPEVPSCTPCGHLFCLSCLLISWT-KKKYEFCPLCRAKVYPKKVI 267

DNA repair protein rad18; All proteins in this family for which functions are known are involved in nucleotide excision repair.This family is based on the phylogenomic analysis of JA Eisen (1999, Ph.D. Thesis, Stanford University). [DNA metabolism, DNA replication, recombination, and repair]

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|.
gi 295390679    9 PQEETLTCSICQGIFMDPVYLRCGHKFCETCLllfQEDIKFPAYCPTCRQP 59
Cdd:TIGR00599  22 PLDTSLRCHICKDFFDVPVLTSCSHTFCSLCI---RRCLSNQPKCPLCRAE 69

RING finger, HC subclass, found in Mus musculus tripartite motif-containing protein 43 (TRIM43) and similar propteins; This subfamily includes TRIM43A, TRIM43B and TRIM43C, which are expressed specifically in mouse preimplantation embryos. They contain a typical C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 295390679  11 EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRYIND 67
Cdd:cd23133    1 EETLTCSICQGIFMNPVYLRCGHKFCEACLLLFQEDIKFPAYCPMCRQPFNQEYIND 57

PRY/SPRY domain in tripartite motif-binding protein 21 (TRIM21) also known as 52kD Ribonucleoprotein Autoantigen (Ro52); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM21, which is also known as Sjogren Syndrome Antigen A (SSA), SSA1, 52kD Ribonucleoprotein Autoantigen (Ro52, Ro/SSA, SS-A/Ro) or RING finger protein 81 (RNF81). TRIM21 domains are composed of RING/B-box/coiled-coil core and also known as RBCC proteins. As an E3 ligase, TRIM21 mediates target specificity in ubiquitination; it regulates type 1 interferon and proinflammatory cytokines via ubiquitination of interferon regulatory factors (IRFs). It is up-regulated at the site of autoimmune inflammation, such as cutaneous lupus lesions, indicating a central role in the tissue destructive inflammatory process. It interacts with auto-antigens in patients with Sjogren syndrome and systemic lupus erythematosus, a chronic systemic autoimmune disease characterized by the presence of autoantibodies against the protein component of the human intracellular ribonucleoprotein-RNA complexes and more specifically TRIM21, Ro60/TROVE2 and La/SSB proteins. It binds the Fc part of IgG molecules via its PRY-SPRY domain with unexpectedly high affinity.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNkDHYILITRIGREHYIEKPVGQVGVFLD 408
Cdd:cd12900   49 GAQRFNSGKHYWEVDVTGKEAWDLGVCRDSVRRKGQFLLSPENGFWTIWLWN-KKYEAGTSPQTTLHLQVPPCQVGIFLD 127

                         90       100       110
                 ....*....|....*....|....*....|....*...
gi 295390679 409 CEGGYVSFVDVAK-SSLILSYSPGTFHCAVRPFFFAAY 445
Cdd:cd12900  128 YEAGVVSFYNITDhGSLIYTFSECAFTGPLRPFFNPGF 165

butyrophilin subfamily member A1 and A2 (BTN1A and BTN2A); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of butyrophilin family 1A and 2A (BTN1A and BTN2A). BTNs belong to receptor glycoproteins of immunoglobulin (Ig) superfamily, characterized by the presence of extracellular Ig-like domains (IgV and/or IgC). BTN1A plays a role in the secretion, formation and stabilization of milk fat globules. The B30.2 domain of BTN1A1 binds the enzyme xanthine oxidoreductase (XOR) in order to participate in milk fat globule secretion; this interaction may lead to the production of reactive oxygen species, which have immunomodulatory and antimicrobial functions. Duplication events have led to three paralogs of BTN2A in primates: BTN2A1, BTN2A2, and BTN2A3. In humans, only BTN2A1 has been functionally characterized; it has been detected on epithelial cells and leukocytes, and identified as a novel ligand of dendritic cell-specific ICAM-3 grabbing nonintegrin (DCSIGN), a C-type lectin receptor that acts as an internalization receptor for HIV-1, HCV, and other pathogens. BTN2A2 mRNA has been shown to be expressed in circulating human immune cells.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIF-LLECLRNKdhYILITRIGREHYIEKPVGQVGVFL 407
Cdd:cd15819   48 GQEGFTSGRHYWEVEVGDRTSWDLGVCRDNVMRKGRVTLSPENGFwAIRLYGNE--YWALTSPETPLTLKEPPRRVGIFL 125

                         90       100       110
                 ....*....|....*....|....*....|....
gi 295390679 408 DCEGGYVSFVDVAKSSLILSYSPGTFHCAVRPFF 441
Cdd:cd15819  126 DYEAGDVSFYNMTDGSHIYTFPQTAFSGPLRPFF 159

PRY/SPRY domain in tripartite motif-binding protein 39 (TRIM39) and TRIM39-like; This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of pyrin, several tripartite motif-containing proteins (TRIMs), including E3 ubiquitin-protein ligase (TRIM21), RET finger protein (RFP)/tripartite motif protein 27 (TRIM27), as well as butyrophilin (Btns) and butyrophilin-like (Btnl) family members, with the exception of Btnl2. Btn and Btnl family members are novel regulators of immune responses, with many of the genes located within the MHC. They are implicated in T-cell inhibition and modulation of epithelial cell-T cell interactions. TRIM21 (also known as RO52, SSA1 or RNF81) is a major autoantigen in autoimmune diseases such as rheumatoid arthritis, systemic lupus erythematosus, and Sjorgen's syndrome. TRIM27 (also known as Ret finger protein, RFP or RNF76) negatively regulates CD4 T-cells by ubiquitinating and inhibiting the class II phosphatidylinositol 3 kinase C2beta (PI3K-C2beta), a kinase critical for KCa3.1 channel activation. The PRY/SPRY domain of Pyrin, which is mutated in familial Mediterranean fever patients, interacts with inflammasome components and inhibits proIL-1beta processing.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKDHYILITRIGREHYIEKPvGQVGVFLD 408
Cdd:cd13745   49 GAEGFTGGRHYWEVEVGDKTEWTLGVCRESVSRKGEVTLSPENGYWTVWLRDGKYEALTSPPTPLPVSVRP-SRVGIFLD 127

                         90       100       110
                 ....*....|....*....|....*....|....*..
gi 295390679 409 CEGGYVSFVDVAKSSLILSYSpGTFHCAVRPFFFAAY 445
Cdd:cd13745  128 YEAGEVSFYNVTDRSHLFTFT-DTFSGTLRPYFYPGL 163

PRY/SPRY domain in tripartite motif-containing protein 27 (TRIM27), also known as RING finger protein 76 (RNF76); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM27, also known as RING finger protein 76 (RNF76) or RET finger protein (RFP). TRIM27 domain is composed of RING/B-box/coiled-coil core and also known as RBCC proteins. It is highly expressed in the spleen, thymus and in cells of the hematopoietic compartment. TRIM27 exhibits either nuclear or cytosolic localization depending on the cell type. TRIM27 negatively regulates nucleotide-binding oligomerization domain containing 2 (NOD2)-mediated signaling by proteasomal degradation of NOD2, suggesting that TRIM27 could be a new target for therapeutic intervention in NOD2-associated diseases such as Crohn's. High expression of TRIM27 is observed in several human cancers, including breast and endometrial cancer, where elevated TRIM27 expression predicts poor prognosis. Also, TRIM27 forms an oncogenic fusion protein with Ret proto-oncogene. It is involved in different stages of spermatogenesis and its significant expression in male germ cells and seminomas, suggests that TRIM27 may be associated with the regulation of testicular germ cell proliferation and histological-type of germ cell tumors. TRIM27 could also be a predictive marker for chemoresistance in ovarian cancer patients. In the neurotoxin model of Parkinson's disease (PD), deficiency of TRIM27 decreases apoptosis and protects dopaminergic neurons, making TRIM27 an effective potential target during the treatment of PD.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKDHYILITRIGREHYIEKPVGQVGVFLD 408
Cdd:cd15814   48 GSPCFIAGRHYWEVEVGDKAKWTIGVCEDSVCRKGGVTSAPQNGFWAVSLWYGKEYWALTSPMTALPLRTPLQRVGIFLD 127

                         90       100       110
                 ....*....|....*....|....*....|....*...
gi 295390679 409 CEGGYVSFVDVAKSSLILSYSPGTFHCAVRPFFFAAYT 446
Cdd:cd15814  128 YDAGEVSFYNVTERCHTFTFSHATFCGPVRPYFSLSYS 165

PRY/SPRY domain of butyrophilin 3 (BTN3), includes BTN3A1, BTN3A2, BTN3A3 as well as BTN-like 3 (BTNL3); BTN3A also known as CD277; This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of butyrophilin family 3A (BTN3A); duplication events have led to three paralogs in primates: BTN3A1, BTN3A2, and BTN3A3. BTNs belong to receptor glycoproteins of immunoglobulin (Ig) superfamily, characterized by the presence of extracellular Ig-like domains (IgV and/or IgC). BTN3 transcripts are ubiquitously present in all immune cells (T cells, B cells, NK cells, monocytes, dendritic cells, and hematopoietic precursors) with different expression levels; BTN3A1 and BTN3A2 are expressed mainly by CD4+ and CD8+ T cells, BTN3A2 is the major form expressed in NK cells, and BTN3A3 is poorly expressed in these immune cells. The PRY/SPRY domain of the BTN3A1 isoform mediates phosphoantigen (pAg)-induced activation by binding directly to the pAg.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKDHYILITRIGREHYIEKPVGQVGVFLD 408
Cdd:cd15820   50 GCKSFTSGRHFWEVEVGDRKEWYVGVCRENVERKLWVKMAPENGFWTIGLSDGNDYQALTDPRTKLTIANPPQRVGVFLD 129

                         90       100       110
                 ....*....|....*....|....*....|...
gi 295390679 409 CEGGYVSFVDVAKSSLILSYSPGTFHCAVRPFF 441
Cdd:cd15820  130 YETGEVSFYNAMDGSHIYTFPHTSFSGPLYPVF 162

RING finger, HC subclass, found in tripartite motif-containing proteins, TRIM7, TRIM11 and TRIM27, and similar proteins; TRIM7, TRIM11 and TRIM27, closely related tripartite motif-containing proteins, belong to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox2, and a coiled coil region, as well as a SPRY/B30.2 domain positioned C-terminal to the RBCC domain. TRIM7, also known as glycogenin-interacting protein (GNIP) or RING finger protein 90 (RNF90), is an E3 ubiquitin-protein ligase that mediates c-Jun/AP-1 activation by Ras signalling. Its phosphorylation and activation by MSK1 in response to direct activation by the Ras-Raf-MEK-ERK pathway can stimulate TRIM7 E3 ubiquitin ligase activity in mediating Lys63-linked ubiquitination of the AP-1 coactivator RACO-1, leading to RACO-1 protein stabilization. Moreover, TRIM7 binds and activates glycogenin, the self-glucosylating initiator of glycogen biosynthesis. TRIM11, also known as protein BIA1, or RING finger protein 92 (RNF92), is an E3 ubiquitin-protein ligase involved in the development of the central nervous system. It is overexpressed in high-grade gliomas and promotes proliferation, invasion, migration and glial tumor growth. TRIM11 acts as a potential therapeutic target for congenital central hypoventilation syndrome (CCHS) by mediating the degradation of CCHS-associated polyalanine-expanded Phox2b. TRIM11 modulates the function of neurogenic transcription factor Pax6 through the ubiquitin-proteosome system, and thus plays an essential role for Pax6-dependent neurogenesis. It also binds to and destabilizes a key component of the activator-mediated cofactor complex (ARC105), humanin, a neuroprotective peptide against Alzheimer's disease-relevant insults, and further regulates ARC105 function in transforming growth factor beta (TGFbeta) signaling. Moreover, TRIM11 negatively regulates retinoic acid-inducible gene-I (RIG-I)-mediated interferon-beta (IFNbeta) production and antiviral activity by targeting TANK-binding kinase-1 (TBK1). It may contribute to the endogenous restriction of retroviruses in cells. It enhances N-tropic murine leukemia virus (N-MLV) entry by interfering with Ref1 restriction. It also suppresses the early steps of human immunodeficiency virus HIV-1 transduction, resulting in decreased reverse transcripts. TRIM27, also known as RING finger protein 76 (RNF76), RET finger protein (RFP), or zinc finger protein RFP, is a nuclear E3 ubiquitin-protein ligase that is highly expressed in testis and in various tumor cell lines. Expression of TRIM27 is associated with prognosis of colon and endometrial cancers. TRIM27 was first identified as a fusion partner of the RET receptor tyrosine kinase. It functions as a transcriptional repressor and associates with several proteins involved in transcriptional activity, such as enhancer of polycomb 1 (Epc1), a member of the Polycomb group proteins, and Mi-2beta, a main component of the nucleosome remodeling and deacetylase (NuRD) complex, and the cell cycle regulator retinoblastoma protein (RB1). It also interacts with HDAC1, leading to downregulation of thioredoxin binding protein 2 (TBP-2), which inhibits the function of thioredoxin. Moreover, TRIM27 mediates Pax7-induced ubiquitination of MyoD in skeletal muscle atrophy. In addition, it inhibits muscle differentiation by modulating serum response factor (SRF) and Epc1. TRIM27 promotes a non-canonical polyubiquitination of PTEN, a lipid phosphatase that catalyzes PtdIns(3,4,5)P3 (PIP3) to PtdIns(4,5)P2 (PIP2). It is an IKKepsilon-interacting protein that regulates IkappaB kinase (IKK) function and negatively regulates signaling involved in the antiviral response and inflammation. TRIM27 also forms a protein complex with MBD4 or MBD2 or MBD3, and thus plays an important role in the enhancement of transcriptional repression through MBD proteins in tumorigenesis, spermatogenesis, and embryogenesis. It is a component of an estrogen receptor 1 (ESR1) regulatory complex that is involved in estrogen receptor-mediated transcription in MCF-7 cells.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 295390679  10 QEEtLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQR 63
Cdd:cd16594    3 QEE-LTCPICLDYFTDPVTLDCGHSFCRACIARCWEEPETSASCPQCRETCPQR 55

RING finger, HC subclass, found in tripartite motif-containing proteins TRIM43, TRIM48, TRIM49, TRIM51, TRIM64 and similar proteins; The family includes a group of closely related uncharacterized tripartite motif-containing proteins, TRIM43, TRIM43B, TRIM48/RNF101, TRIM49/RNF18, TRIM49B, TRIM49C/TRIM49L2, TRIM49D/TRIM49L, TRIM51/SPRYD5, TRIM64, TRIM64B, and TRIM64C, whose biological function remain unclear. TRIM49, also known as testis-specific RING-finger protein, has moderate similarity with SS-A/Ro52 antigen, suggesting it may be one of the target proteins of autoantibodies in the sera of patients with these autoimmune disorders. All family members belong to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains as well as a SPRY/B30.2 domain positioned C-terminal to the RBCC domain. In RBCC region, they all have a C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|...
gi 295390679  14 LTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRYIN 66
Cdd:cd16603    5 LTCPICMNYFIDPVTIDCGHSFCRPCLYLNWQDIPFLAQCPECRKTTEQRNLK 57

RING finger, HC subclass, found in tripartite motif-containing protein 69 (TRIM69) and similar proteins; TRIM69, also known as RFP-like domain-containing protein trimless or RING finger protein 36 (RNF36), is a testis E3 ubiquitin-protein ligase that plays a specific role in apoptosis and may also play an important role in germ cell homeostasis during spermatogenesis. TRIM69 belongs to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, as well as a B30.2/SPRY (SplA and ryanodine receptor) domain positioned C-terminal to the RBCC domain.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 295390679  12 ETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQR 63
Cdd:cd16611    3 EELHCPLCLDFFRDPVMLSCGHNFCQSCITGFWELQAEDTTCPECRELCQYR 54

RING finger, HC subclass, found in tripartite motif-containing protein TRIM25 and similar proteins; TRIM25, also known as estrogen-responsive finger protein (EFP), RING finger protein 147 (RNF147), or RING-type E3 ubiquitin transferase, is an E3 ubiquitin/ISG15 ligase that is induced by estrogen and is therefore particularly abundant in placenta and uterus. TRIM25 regulates various cellular processes through E3 ubiquitin ligase activity, transferring ubiquitin and ISG15 to target proteins. It mediates K63-linked polyubiquitination of retinoic acid inducible gene I (RIG-I) that is crucial for downstream antiviral interferon signaling. It is also required for melanoma differentiation-associated gene 5 (MDA5) and mitochondrial antiviral signaling (MAVS, also known as IPS-1, VISA, Cardiff) mediated activation of nuclear factor-kappaB (NF-kappaB) and interferon production. Upon UV irradiation, TRIM25 interacts with mono-ubiquitinated PCNA and promotes its ISG15 modification (ISGylation), suggesting a crucial role in termination of error-prone translesion DNA synthesis. TRIM25 also functions as a novel regulator of p53 and Mdm2. It enhances p53 and Mdm2 abundance by inhibiting their ubiquitination and degradation in 26S proteasomes. Meanwhile, it inhibits p53's transcriptional activity and dampens the response to DNA damage, and is essential for medaka development and this dependence is rescued by silencing of p53. Moreover, TRIM25 is involved in the host cellular innate immune response against retroviral infection. It interferes with the late stage of feline leukemia virus (FeLV) replication. Furthermore, TRIM25 acts as an oncogene in gastric cancer. Its blockade by RNA interference inhibits migration and invasion of gastric cancer cells through transforming growth factor-beta (TGF-beta) signaling, suggesting it presents a novel target for the detection and treatment of gastric cancer. In addition, TRIM25 acts as an RNA-specific activator for Lin28a/TuT4-mediated uridylation. TRIM25 belongs to the C-IV subclass of TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, as well as a B30.2/SPRY (SplA and ryanodine receptor) domain positioned C-terminal to the RBCC domain.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 295390679  11 EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAY-CPTCR 57
Cdd:cd16597    3 EEELTCSICLELFKDPVTLPCGHNFCGVCIEKTWDSQHGSEYsCPQCR 50

RING finger, HC subclass, found in tripartite motif-containing protein 77 (TRIM77) and similar proteins; TRIM77 belongs to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including two consecutive zinc-binding domains, a C3HC4-type RING-HC finger and Bbox2, as well as a SPRY/B30.2 domain positioned C-terminal to the RBCC domain.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....
gi 295390679  11 EETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRY 64
Cdd:cd16543    1 EDQLTCSICLDLLKDPVTIPCGHSFCMNCITLLWDRKQGVPSCPQCRESFPPRP 54

PRY/SPRY domain of tripartite motif-binding protein 11 (TRIM11), also known as RING finger protein 92 (RNF92); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM11, also known as RING finger protein 92 (RNF92) or BIA1. TRIM11 domains are composed of RING/B-box/coiled-coil core and also known as RBCC proteins. It localizes to the nucleus and the cytoplasm; it is overexpressed in high-grade gliomas and promotes proliferation, invasion, migration and glial tumor growth. TRIM11 increases expression of dopamine beta-hydroxylase gene by interacting with the homeodomain transcription factor, PHOX2B, via the B30.2/SPRY domain, thus playing a potential role in the specification of noradrenergic (NA) neuron phenotype. It has also been shown that TRIM11 plays a critical role in the clearance of mutant PHOX2B, which causes congenital central hypoventilation syndrome, via the proteasome. TRIM11 binds a key component of the activator-mediated cofactor complex (ARC105), and destabilizes it, through the ubiquitin-proteasome system; ARC105 mediates chromatin-directed transcription activation and is a key regulatory factor for transforming growth factor beta (TGFbeta) signaling.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFlleclrnkdhYILITrIGREHYIEK--------PV 400
Cdd:cd15811   46 GRERFTSGRHYWEVEVGDRTSWALGVCKENVNRKEKGELSAGNGF----------WILVF-LGNYYSSERrtfaplrdPP 114

                         90       100       110       120
                 ....*....|....*....|....*....|....*....|.
gi 295390679 401 GQVGVFLDCEGGYVSFVDVAKSSLILSYSPGTFHCAVRPFF 441
Cdd:cd15811  115 RRVGIFLDYEAGHLSFYSATDGSLLFIFPETPFSGTLRPLF 155

PRY/SPRY domain, also known as B30.2; This domain contains residues in the N-terminus that form a distinct PRY domain structure such that the B30.2 domain consists of PRY and SPRY subdomains. B30.2 domains comprise the C-terminus of three protein families: BTNs (receptor glycoproteins of immunoglobulin superfamily); several TRIM proteins (composed of RING/B-box/coiled-coil core); Stonutoxin (secreted poisonous protein of the stonefish Synanceia horrida). While SPRY domains are evolutionarily ancient, B30.2 domains are a more recent adaptation where the SPRY/PRY combination is a possible component of immune defense. Among the TRIM proteins, also known as the N-terminal RING finger/B-box/coiled coil (RBCC) family, only Classes I and II contain the B30.2 domain that has evolved under positive selection. Class I TRIM proteins include multiple members involved in antiviral immunity at various levels of interferon signaling cascade. Among the 75 human TRIMs, roughly half enhance immune response, which they do at multiple levels in signaling pathways. The PRY-SPRY domain in these TRIM families is suggested to serve as the target binding site.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 307 FDIRLLHESTSLdSAKTHRVSW---------------------GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLR-GRS 364
Cdd:cd12874    3 FDPDTAHLNLIL-SDDLRSVRVgdisqhppeppprffecwqvlGSQSFSSGRHYWEVDVQDDSSWYVGVTYKSLPRkGKM 81

                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 365 YVVTPTDIFL-LECLRNK---DHYILITRI-GREHYiekpvgQVGVFLDCEGGYVSFVDVAKS-SLIlsYspgTFHC--- 435
Cdd:cd12874   82 SNLGRNNGSWcLEWRENEfsaWHNNPETRLpVTPPR------RLGVFLDCDGGSLSFYGVTDGvQLL--Y---TFKAkft 150

                 ....*...
gi 295390679 436 -AVRPFFF 442
Cdd:cd12874  151 ePLYPAFW 158

PRY/SPRY domain in tripartite motif-containing protein 22 (TRIM22), also known as RING finger protein 94 (RNF94) or Stimulated trans-acting factor of 50 kDa (STAF50); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM22, also known as RING finger protein 94 (RNF94) or STAF50 (Stimulated trans-acting factor of 50 kDa). TRIM6 domain is composed of RING/B-box/coiled-coil core and also known as RBCC protein. TRIM22 is an interferon-induced protein, predominantly expressed in peripheral blood leukocytes, in lymphoid tissue such as spleen and thymus, and in the ovary.TRIM22 plays an integral role in the host innate immune response to viruses; it has been shown to inhibit the replication of a number of viruses, including HIV-1, hepatitis B, and influenza A. TRIM22 inhibits influenza A virus (IAV) infection by targeting the viral nucleoprotein for degradation; it represents a novel restriction factor up-regulated upon IAV infection that curtails its replicative capacity in epithelial cells. Altered TRIM22 expression has also been associated with multiple sclerosis, cancer, and autoimmune disease. A large number of high-risk non-synonymous (ns)SNPs have been identified in the highly polymorphic TRIM22 gene, most of which are located in the SPRY domain and could possibly alter critical regions of the SPRY structural and functional residues, including several sites that undergo post-translational modification. TRIM22 is a direct p53 target gene and inhibits the clonogenic growth of leukemic cells. Its expression in Wilms tumors is negatively associated with disease relapse. It is greatly under-expressed in breast cancer cells as compared to non-malignant cell lines; p53 dysfunction may be one of the mechanisms for its down-regulation.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 328 WGKKSFSRGKYYWEVDLKDYRRWTVGVC---KDPWLRGRSYVV--------------TPTDIFLLECLRNKDHY------ 384
Cdd:cd15824   47 LGCQYFSSGKYYWEVDVSGKIAWILGVYskrNNLNKRKSSGFAfdpnvnhpnvysryRPQNGYWVIGLQNESEYnafeds 126

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 295390679 385 ------ILITrigrehYIEKPVGQVGVFLDCEGGYVSFVDVAK-SSLILSYSPGTFHCAVRPFF 441
Cdd:cd15824  127 sssdpkVLTL------SMAVPPHRVGVFLDYEAGTVSFFNVTNhGSLIYKFSKCCFSQPVYPYF 184

PRY/SPRY domain in tripartite motif-binding protein 7 (TRIM7)-like, including TRIM7, TRIM10, TRIM15, TRIM26, TRIM39, TRIM41; This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of several tripartite motif-containing (TRIM) proteins, including TRIM7 (also referred to as glycogenin-interacting protein, RING finger protein 90 or RNF90), TRIM10, TRIM15, TRIM26, TRIM39 and TRIM41. TRIM7 or GNIP interacts with glycogenin and stimulates its self-glucosylating activity via its SPRY domain. TRIM10 (also known as hematopoietic RING finger 1 (HERF1) or TRIM10/HERF1) plays a key role in definitive erythroid development; downregulation of the Spi-1/PU.1 oncogene induces the expression of TRIM10/HERF1, a key factor required for terminal erythroid cell differentiation and survival. Antiviral activity of TRIM15 is dependent on the ability of its B-box to interact with the MLV Gag precursor protein; downregulation of TRIM15, along with TRIM11, enhances virus release suggesting that these proteins contribute to the endogenous restriction of retroviruses in cells. Tripartite motif-containing 26 (TRIM26) function is as yet unknown; however, since it is localized in the human histocompatibility complex (MHC) class I region, TRIM26 may play a role in immune response although studies show no association between TRIM26 polymorphisms and the risk of aspirin-exacerbated respiratory disease. TRIM39 is a MOAP-1 (Modulator of Apoptosis)-binding protein that stabilizes MOAP-1 through inhibition of its poly-ubiquitination process. TRIM41 (also known as RING finger-interacting protein with C kinase or RINCK) functions as an E3 ligase that catalyzes the ubiquitin-mediated degradation of protein kinase C.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCK-----------DP----W----LRGRSYVVT--PTDIFLLECLRnkdhyili 387
Cdd:cd12888   46 GCEGFTSGRHYWEVEVGDGGGWAVGVAResvrrkgeisfSPeegiWavgqWGGQYWALTspETPLPLSEVPR-------- 117

                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 295390679 388 trigrehyiekpvgQVGVFLDCEGGYVSFVDVAKSSLILSYSPGTF-HCAVRPFF 441
Cdd:cd12888  118 --------------RIRVYLDYEGGQVAFFDADNEAPIFTFPPASFaGERIFPWF 158

zinc-binding protein A33-like; This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM69 and TRIM proteins NF7 and bloodthirsty (bty). TRIM69 is a novel testis E3 ubiquitin ligase that may function to ubiquitinate its particular substrates during spermatogenesis. In humans, TRIM69 localizes in the cytoplasm and nucleus, and requires an intact RING finger domain to function. TRIM protein NF7, which also contains a chromodomain (CHD) at the N-terminus and an RFP (Ret finger protein)-like domain at the C-terminus, is required for its association with transcriptional units of RNA polymerase II which is mediated by a trimeric B box. In Xenopus oocyte, xNF7 has been identified as a nuclear microtubule-associated protein (MAP) whose microtubule-bundling activity, but not E3-ligase activity, contributes to microtubule organization and spindle integrity. Bloodthirsty (bty) is a novel gene identified in zebrafish and has been shown to likely play a role in in regulation of the terminal steps of erythropoiesis.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKDHYILITRIGREHYIEKPVGQVGVFLD 408
Cdd:cd12905   50 ASQGFQSGRHYWEVWVGSKTKWDLGVASESVDRQARVKLCPENGYWTLRLRNGDEYWAGTQPWTRLRVTSRPQRIGVFLD 129

                         90       100       110
                 ....*....|....*....|....*....|...
gi 295390679 409 CEGGYVSFVDVAKSSLILSYSPGTFHcAVRPFF 441
Cdd:cd12905  130 CEERKVSFYNADDMSLLYSFHQGPRG-KVFPFF 161

RING finger, HC subclass, found in RING finger protein 39 (RNF39) and similar proteins; RNF39, also called protein HZFw, may play a role in prolonged long term-potentiation (LTP) maintenance. It is involved in the etiology of Behcet's disease (BD). It may also be involved in HIV-1 replication. RNF39 acts as an E3 ubiquitin ligase that inhibits retinoic acid-inducible gene-I (RIG-I)-like receptor (RLR) pathways by mediating K48-linked ubiquitination and proteasomal degradation of DDX3X (DEAD-box RNA helicase 3, X-linked). RNF39 contains a typical C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 295390679  10 QEETlTCSICQGIFMDPVYLRCGHKFCETCLLLF--QEDIKF----PAYCPTCRQPC 60
Cdd:cd16592    2 QEET-TCPICLGYFKDPVILDCEHSFCRACIARHwgQEAMEGngaeGVFCPQCGEPC 57

RING finger, HC subclass, found in tripartite motif-containing proteins TRIM13, TRIM59 and similar proteins; TRIM13 and TRIM59, two closely related tripartite motif-containing proteins, belong to the C-V subclass of the TRIM (tripartite motif) family of proteins that are defined by an N-terminal RBCC (RING, Bbox, and coiled coil) domain, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, followed by a C-terminal transmembrane domain. TRIM13, also known as B-cell chronic lymphocytic leukemia tumor suppressor Leu5, leukemia-associated protein 5, putative tumor suppressor RFP2, RING finger protein 77 (RNF77), or Ret finger protein 2, is an endoplasmic reticulum (ER) membrane anchored E3 ubiquitin-protein ligase that interacts with proteins localized to the ER, including valosin-containing protein (VCP), a protein indispensable for ER-associated degradation (ERAD). TRIM59, also known as RING finger protein 104 (RNF104) or tumor suppressor TSBF-1, is a putative E3 ubiquitin-protein ligase that functions as a novel multiple cancer biomarker for immunohistochemical detection of early tumorigenesis.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|
gi 295390679  12 ETLTCSICQGIFMDPVYLRCGHKFCETCLL-LFQEDIKF---PAYCPTCR 57
Cdd:cd16581    1 EELTCSICYNIFDDPKILPCSHTFCKNCLEkLLAASGYYllaSLKCPTCR 50

RING finger, HC subclass, found in breast cancer type 1 susceptibility protein (BRCA1) and similar proteins; BRCA1, also known as RING finger protein 53 (RNF53), is a RING finger protein encoded by the tumor suppressor gene BRCA1 that regulates all DNA double-strand break (DSB) repair pathways. BRCA1 is frequently mutated in patients with hereditary breast and ovarian cancer (HBOC). Its mutation is also associated with an increased risk of pancreatic, stomach, laryngeal, fallopian tube, and prostate cancer. It plays an important role in the DNA damage response signaling and has been implicated in various cellular processes such as cell cycle regulation, transcriptional regulation, chromatin remodeling, DNA DSBs, and apoptosis. BRCA1 contains an N-terminal C3HC4-type RING-HC finger, and two BRCT (BRCA1 C-terminus domain) repeats at the C-terminus.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 295390679  10 QEETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPAYCPTCRQPCNQRYIND 67
Cdd:cd16498   13 MQKNLECPICLELLKEPVSTKCDHQFCRFCILKLLQKKKKPAPCPLCKKSVTKRSLQE 70

RING finger, HC subclass, found in tripartite motif-containing protein 38 (TRIM38) and similar proteins; TRIM38, also known as RING finger protein 15 (RNF15) or zinc finger protein RoRet, is an E3 ubiquitin-protein ligase that promotes K63- and K48-linked ubiquitination of cellular proteins and also catalyzes self-ubiquitination. It negatively regulates Tumor necrosis factor alpha (TNF-alpha)- and interleukin-1beta-triggered Nuclear factor-kappaB (NF-kappaB) activation by mediating lysosomal-dependent degradation of transforming growth factor beta (TGFbeta)-activated kinase 1 (TAK1)-binding protein (TAB)2/3, two critical components of the TAK1 kinase complex. It also inhibits TLR3/4-mediated activation of NF-kappaB and interferon regulatory factor 3 (IRF3) by mediating ubiquitin-proteasomal degradation of TNF receptor-associated factor 6 (Traf6) and NAK-associated protein 1 (Nap1), respectively. Moreover, TRIM38 negatively regulates TLR3-mediated interferon beta (IFN-beta) signaling by targeting ubiquitin-proteasomal degradation of TIR domain-containing adaptor inducing IFN-beta (TRIF). It functions as a valid target for autoantibodies in primary Sjogren's Syndrome. TRIM38 belongs the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, a B-box, and two coiled coil domains, as well as a B30.2/SPRY (SplA and ryanodine receptor) domain positioned C-terminal to the RBCC domain.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 295390679  12 ETLTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIK--------FPayCPTCRQPC 60
Cdd:cd16600    4 EEATCSICLQLMTEPVSINCGHSYCKRCIVSFLENQSqlepgletFS--CPQCRAPF 58

Domain in SPla and the RYanodine Receptor; Domain of unknown function. Distant homologues are domains in butyrophilin/marenostrin/pyrin homologues.

                           10        20        30        40        50        60        70        80
                   ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679   335 RGKYYWEVDLKDYRRWTVGVCKDPWLRGRSYVVTPTDIFLLECLRNKdhyILITRIGREHYIEKPVGQ---VGVFLDCEG 411
Cdd:smart00449   1 SGRHYFEVEIGDGGHWRVGVATKSVPRGYFALLGEDKGSWGYDGDGG---KKYHNSTGPEYGLPLQEPgdvIGCFLDLEA 77

                           90       100       110
                   ....*....|....*....|....*....|.
gi 295390679   412 GYVSFVDVAKSSLILSYSPGTFHCAVRPFFF 442
Cdd:smart00449  78 GTISFYKNGKYLHGLAFFDVKFSGPLYPAFS 108

RING finger, HC subclass, found in tripartite motif-containing protein TRIM17 and similar proteins; TRIM17, also known as RING finger protein 16 (RNF16) or testis RING finger protein (Terf), is a crucial E3 ubiquitin ligase that is necessary and sufficient for neuronal apoptosis and contributes to Mcl-1 ubiquitination in cerebellar granule neurons (CGNs). It interacts in a SUMO-dependent manner with nuclear factor of activated T cell NFATc3 transcription factor, and thus inhibits the activity of NFATc3 by preventing its nuclear localization. In contrast, it binds to and inhibits NFATc4 transcription factor in a SUMO-independent manner. Moreover, TRIM17 stimulates degradation of kinetochore protein ZW10 interacting protein (ZWINT), a known component of the kinetochore complex required for the mitotic spindle checkpoint, and negatively regulates cell proliferation. TRIM17 belongs to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, as well as a B30.2/SPRY (SplA and ryanodine receptor) domain positioned C-terminal to the RBCC domain.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 295390679  10 QEETlTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIK-----------FPayCPTCRQPCNQR 63
Cdd:cd16595    3 QEEA-TCSICLDYFTDPVMTTCGHNFCRACIQLSWEKARgkkgrrkqkgsFP--CPECREMSPQR 64

RING finger, HC subclass, found in RING finger proteins RNF113A, RNF113B, and similar proteins; RNF113A, also known as zinc finger protein 183 (ZNF183), is an E3 ubiquitin-protein ligase that physically interacts with the E2 protein, UBE2U. A nonsense mutation in RNF113A is associated with an X-linked trichothiodystrophy (TTD). Its yeast ortholog Cwc24p is predicted to have a spliceosome function and acts in a complex with Cef1p to participate in pre-U3 snoRNA splicing, indirectly affecting pre-rRNA processing. It is also important for the U2 snRNP binding to primary transcripts and co-migrates with spliceosomes. Moreover, the ortholog of RNF113A in fruit flies may also act as a spliceosome and is hypothesized to be involved in splicing, namely within the central nervous system. The ortholog in Caenorhabditis elegans is involved in DNA repair of inter-strand crosslinks. RNF113B, also known as zinc finger protein 183-like 1, shows high sequence similarity with RNF113A. Both RNF113A and RNF113B contain a CCCH-type zinc finger, which is commonly found in RNA-binding proteins involved in splicing, and a C3HC4-type RING-HC finger, which is frequently found in E3 ubiquitin ligases.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*...
gi 295390679  15 TCSICQGIFMDPVYLRCGHKFCETCLLL-FQEDIKfpayCPTCRQPCN 61
Cdd:cd16539    7 ACFICRKPFKNPVVTKCGHYFCEKCALKhYRKSKK----CFVCGKQTN 50

HC subclass of RING (RING-HC) finger and its variants; The RING finger is a specialized type of Zn-finger of 40 to 60 residues that binds two atoms of zinc. It is defined by the "cross-brace" motif that chelates zinc atoms by eight amino acid residues, typically Cys or His, arranged in a characteristic spacing. Canonical RING motifs have been categorized into two major subclasses, RING-HC (C3HC4-type) and RING-H2 (C3H2C3-type), according to their Cys/His content. There are also many variants of RING fingers. Some have a different Cys/His pattern. Some lack a single Cys or His residue at typical Zn ligand positions, especially, the fourth or eighth zinc ligand is prevalently exchanged for an Asp, which can chelate Zn in a RING finger as well. This family corresponds to the HC subclass of RING (RING-HC) fingers that are characterized by containing C3HC4-type canonical RING-HC fingers or noncanonical RING-HC finger variants, including C4C4-, C3HC3D-, C2H2C4-, and C3HC5-type modified RING-HC fingers. The canonical RING-HC finger has been defined as C-X2-C-X(9-39)-C-X(1-3)-H-X(2-3)-C-X2-C-X(4-48)-C-X2-C. It binds two Zn ions in a unique "cross-brace" arrangement, which distinguishes it from tandem zinc fingers and other similar motifs. RING-HC fingers can be found in a group of diverse proteins with a variety of cellular functions, including oncogenesis, development, viral replication, signal transduction, the cell cycle, and apoptosis. Many of them are ubiquitin-protein ligases (E3s) that serve as scaffolds for binding to ubiquitin-conjugating enzymes (E2s, also referred to as ubiquitin carrier proteins or UBCs) in close proximity to substrate proteins, which enables efficient transfer of ubiquitin from E2 to the substrates.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|...
gi 295390679  14 LTCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPayCPTC 56
Cdd:cd16449    1 LECPICLERLKDPVLLPCGHVFCRECIRRLLESGSIK--CPIC 41

RING finger, HC subclass, found in tripartite motif-containing protein 40 (TRIM40) and similar proteins; TRIM40, also known as probable E3 NEDD8-protein ligase or RING finger protein 35 (RNF35), is highly expressed in the gastrointestinal tract including the stomach, small intestine, and large intestine. It enhances neddylation of inhibitor of nuclear factor kappaB kinase subunit gamma (IKKgamma), inhibits the activity of nuclear factor-kappaB (NF-kappaB)-mediated transcription, and thus prevents inflammation-associated carcinogenesis in the gastrointestinal tract. TRIM40 belongs to the C-V subclass of the TRIM (tripartite motif) family of proteins that are defined by an N-terminal RBCC (RING, Bbox, and coiled coil) domain, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, as well as an uncharacterized region positioned C-terminal to the RBCC domain.

                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 295390679   8 DPQEETLtCSICQGIFMDPVYLRCGHKFCETCLLLFQEDIKFPA--YCPTCRQPCNQRYIND 67
Cdd:cd16583    1 DSDEEGV-CPICQEPLKEAVSTDCGHLFCRMCLTQHAKKASASGvfSCPVCRKPCSEGVLGD 61

PRY/SPRY domain in tripartite motif-containing (TRIM) proteins, including TRIM14-like, TRIM16-like, TRIM25-like, TRIM47-like, TRIM65 and RNF135, and stonustoxin; This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of several Class I TRIM proteins, including TRIM14, TRIM16 and TRIM25, TRIM47 as well as RING finger protein RNF135 and stonustoxin, a secreted poisonous protein of the stonefish Synanceja horrida. TRIM16 (also known as estrogen-responsive B box protein or EBBP) has E3 ubiquitin ligase activity. It is a regulator of keratinocyte differentiation and a tumor suppressor in retinoid-sensitive neuroblastoma. TRIM25 (also called Efp) ubiquitinates the N terminus of the viral RNA receptor retinoic acid-inducible gene-I (RIG-I) in response to viral infection, leading to activation of the RIG-I signaling pathway, thus resulting in type I interferon production to limit viral replication. It has been shown that the influenza A virus targets TRIM25 and disables its antiviral function. TRIM47, also known as GOA (Gene overexpressed in astrocytoma protein) or RNF100 (RING finger protein 100), is highly expressed in kidney tubular cells, but low expressed in most tissue. It is overexpressed in astrocytoma tumor cells and plays an important role in the process of dedifferentiation that is associated with astrocytoma tumorigenesis. RNF135 ubiquitinates RIG-I (retinoic acid-inducible gene-I) to promote interferon-beta induction during the early phase of viral infection. Stonustoxin (STNX) is a hypotensive and lethal protein factor that also possesses other biological activities such as species-specific hemolysis (due to its ability to form pores in the cell membrane) and platelet aggregation, edema-induction, and endothelium-dependent vasorelaxation (mediated by the nitric oxide pathway and activation of potassium channels). The PRY-SPRY domain in these TRIM families is suggested to serve as the target binding site.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 307 FDIRLLHESTSLdSAKTHRVSW--------------------GKKSFSRGKYYWEVDLKDYRRWTVGVCKdPWLRGRSYV 366
Cdd:cd12891    3 LDPNTAHNNLAL-SGDLKTVTCssenqhypdsperfthsqvlSTQSFSSGRHYWEVEVSESGGWSVGVAY-PSIERKGDE 80

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....
gi 295390679 367 vtptdifllECLRNKDHYILITRIGRE-----HYIEKPV-----GQVGVFLDCEGGYVSFVDVA 420
Cdd:cd12891   81 ---------SRIGRNDKSWCLEWQDKSfsawhNNEETPLpsvssRRLGVYLDYEAGRLSFYELS 135

PRY/SPRY domain in tripartite motif-binding protein 5 (TRIM5), also known as RING finger protein 88 (RNF88); This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM5 which is also known as RING finger protein 88 (RNF88) or TRIM5alpha (TRIM5a), an antiretroviral restriction factor and a retrovirus capsid sensor in immune signaling. TRIM5 domain is composed of RING/B-box/coiled-coil core and also known as RBCC protein. It blocks retrovirus infection soon after the virion core enters the cell cytoplasm by recognizing the capsid protein lattice that encases the viral genomic RNA; the SPRY domain provides the capsid recognition motif that dictates specificity to retroviral restriction. TRIM5a, an E3 ubiquitin ligase, promotes innate immune signaling by activating the TAK1 kinase complex by cooperating with the heterodimeric E2, UBC13/UEV1A. It also stimulates NFkB and AP-1 signaling, and the transcription of inflammatory cytokines and chemokines, and amplifies these activities upon retroviral infection. Interaction of its PRY-SPRY or cyclophilin domains with the retroviral capsid lattice stimulates the formation of a complementary lattice by TRIM5, with greatly increased TRIM5 E3 activity, and host cell signal transduction.

                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 295390679 329 GKKSFSRGKYYWEVDLKDYRRWTVGVCkdpwlrGRSYVVTPTDIFLLECLRNKDHYiliTR---------IGREHYIEK- 398
Cdd:cd15822   55 GSPSITSGKHYWEVDVSKKRAWILGVC------GGKYPNSTLKDFNKQGKNNQKQC---SNyqpkygywvIGLQNKSEYn 125

                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|...
gi 295390679 399 -------------------PVGQVGVFLDCEGGYVSFVDVAKS-SLILSYSPGTFHCAVRPFF 441
Cdd:cd15822  126 afedssssdpliltlsltvPPCRVGVFLDYEAGTVSFFNVTNHgFLIYKFSSCSFSQEVFPYF 188

RING finger, HC subclass, found in tripartite motif-containing protein 72 (TRIM72) and similar proteins; TRIM72, also known as Mitsugumin-53 (MG53), is a muscle-specific protein that plays a central role in cell membrane repair by nucleating the assembly of the repair machinery at muscle injury sites. It is required in repair of alveolar epithelial cells under plasma membrane stress failure. It interacts with dysferlin to regulate sarcolemmal repair. Upregulation of TRIM72 develops obesity, systemic insulin resistance, dyslipidemia, and hyperglycemia, as well as induces diabetic cardiomyopathy through transcriptional activation of the peroxisome proliferation-activated receptor alpha (PPAR-alpha) signaling pathway. Compensation for the absence of AKT signaling by ERK signaling during TRIM72 overexpression leads to pathological hypertrophy. Moreover, TRIM72 functions as a novel negative feedback regulator of myogenesis by targeting insulin receptor substrate-1 (IRS-1). It is transcriptionally activated by the synergism of myogenin (MyoD) and myocyte enhancer factor 2 (MEF2). TRIM72 belongs to the C-IV subclass of the TRIM (tripartite motif) family of proteins that are defined by their N-terminal RBCC (RING, Bbox, and coiled coil) domains, including three consecutive zinc-binding domains, a C3HC4-type RING-HC finger, Bbox1 and Bbox2, and a coiled coil region, as well as a B30.2/SPRY (SplA and ryanodine receptor) domain positioned C-terminal to the RBCC domain.

                         10        20        30        40
                 ....*....|....*....|....*....|....*....|....*..
gi 295390679  14 LTCSICQGIFMDPVYLRCGHKFCETCLL-LFQEDIKFPAYCPTCRQP 59
Cdd:cd16612    5 LSCPLCLKLFQSPVTTECGHTFCQDCLSrVPKEEDGGSTSCPTCQAP 51

RING finger, HC subclass, found in radiation sensitivity protein 5 (RAD5) and similar proteins; RAD5, also known as revertibility protein 2 (REV2), or DNA repair protein RAD5, is a probable helicase, and a member of the UBC2/RAD6 epistasis group. It functions with the DNA repair protein RAD18 in error-free postreplication DNA repair. It is involved in the maintenance of wild-type rates of instability of simple repetitive sequences such as poly(GT) repeats. It may also be involved in maintaining a balance which acts in favor of error-prone non-homologous joining during DNA double-strand breaks repairs. It recruits the UBC13-MMS2 dimer to chromatin for DNA repair. RAD5 contains a typical C3HC4-type RING-HC finger.

                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 295390679  14 LTCSICQGIFMDP---VYLRCGHKFCETCLL---LFQEDIKFPAYCPTCRQPCNQRYI 65
Cdd:cd23131    4 VECSICTQEPIEVgevVFTECGHSFCEDCLLeyiEFQNKKKLDLKCPNCREPISKYRL 61