Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF3 subfamily, TRAF domain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF3 was first described as a molecule that binds the cytoplasmic tail of CD40. However, it is not required for CD40 signaling. More recently, TRAF3 has been identified as a key regulator of type I interferon (IFN) production and the mammalian innate antiviral immunity. It mediates IFN responses in Toll-like receptor (TLR)-dependent as well as TLR-independent viral recognition pathways. It is also a key element in immunological homeostasis through its regulation of the anti-inflammatory cytokine interleukin-10. TRAF3 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 353 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 432
Cdd:cd03777     1 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 80

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 433 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 512
Cdd:cd03777    81 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 160

                         170       180
                  ....*....|....*....|....*.
gi 1622957171 513 VAQTVLENGTYIKDDTIFIKVIVDTS 538
Cdd:cd03777   161 VAQTVLENGTYIKDDTIFIKVIVDTS 186

TRAF-type zinc finger;

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1622957171 136 HLKNdCHFEELPCVRADCKEKVLRKDLRDHVEKACKYREATCSH----CKSQVPMIALQKH 192
Cdd:pfam02176   1 HLET-CPFFPIPCPNGCCKKKILREDLPDHLELDCPKAEVPCPFkvfgCKEDVKREALQRH 60

Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF3 subfamily, TRAF domain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF3 was first described as a molecule that binds the cytoplasmic tail of CD40. However, it is not required for CD40 signaling. More recently, TRAF3 has been identified as a key regulator of type I interferon (IFN) production and the mammalian innate antiviral immunity. It mediates IFN responses in Toll-like receptor (TLR)-dependent as well as TLR-independent viral recognition pathways. It is also a key element in immunological homeostasis through its regulation of the anti-inflammatory cytokine interleukin-10. TRAF3 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 353 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 432
Cdd:cd03777     1 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 80

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 433 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 512
Cdd:cd03777    81 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 160

                         170       180
                  ....*....|....*....|....*.
gi 1622957171 513 VAQTVLENGTYIKDDTIFIKVIVDTS 538
Cdd:cd03777   161 VAQTVLENGTYIKDDTIFIKVIVDTS 186

TRAF-type zinc finger;

                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|.
gi 1622957171 136 HLKNdCHFEELPCVRADCKEKVLRKDLRDHVEKACKYREATCSH----CKSQVPMIALQKH 192
Cdd:pfam02176   1 HLET-CPFFPIPCPNGCCKKKILREDLPDHLELDCPKAEVPCPFkvfgCKEDVKREALQRH 60

helix-rich Mycoplasma protein; Members of this family occur strictly within a subset of Mycoplasma species. Members average 750 amino acids in length, including signal peptide. Sequences are predicted (Jpred 3) to be almost entirely alpha-helical. These sequences show strong periodicity (consistent with long alpha helical structures) and low complexity rich in D,E,N,Q, and K. Genes encoding these proteins are often found in tandem. The function is unknown.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 214 LRSEGTNQQIKAHEASSAV----QHVNLLKEWSNSLEKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNES 289
Cdd:TIGR04523 312 LKSELKNQEKKLEEIQNQIsqnnKIISQLNEQISQLKKELTNSESENSEKQRELEEKQNEIEKLKKENQSYKQEIKNLES 391

                          90       100       110       120       130
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 1622957171 290 KILHLQRVIDSQAEKLKELDKEIRPFRQNWE----EADSMKSSVESLQNRVTELESVD 343
Cdd:TIGR04523 392 QINDLESKIQNQEKLNQQKDEQIKKLQQEKEllekEIERLKETIIKNNSEIKDLTNQD 449

Chromosome segregation protein NDC80, interacts with SMC proteins [Cell cycle control, cell division, chromosome partitioning];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 220 NQQIKAHEASSAVQHVNLLKEWSNSLEKKVSLLQ---NESVEKN---KSIQSLHNQICSFEI--EIERQKemlRNNESKI 291
Cdd:COG5185   262 NTDLRLEKLGENAESSKRLNENANNLIKQFENTKekiAEYTKSIdikKATESLEEQLAAAEAeqELEESK---RETETGI 338

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 292 LHLQRVIDSQAEKLKELDKEIRP----------FRQNWEEADSMKSSVESL-----QNRVTELESVDKSAGQVARNTGLL 356
Cdd:COG5185   339 QNLTAEIEQGQESLTENLEAIKEeienivgeveLSKSSEELDSFKDTIESTkesldEIPQNQRGYAQEILATLEDTLKAA 418

                  ....*..
gi 1622957171 357 ESQLSRH 363
Cdd:COG5185   419 DRQIEEL 425

RING-finger-containing E3 ubiquitin ligase [Signal transduction mechanisms];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171  52 KCEKCRLVLCSPKQTECGHRFCESCMAALLsSSSPKCTACQESvVRDKVFKDNCCKREIL------------ALQIYCR- 118
Cdd:COG5432    27 RCRICDCRISIPCETTCGHTFCSLCIRRHL-GTQPFCPVCRED-PCESRLRGSSGSREINesharnrdllrkVLESLCRl 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 119 ----NESRGCAEQLTLGHllVHLKNDCHFEELPCVrADCKEKVLRKDLRDHVEKAckyRE--ATCSHCKSQVPMIALQKH 192
Cdd:COG5432   105 prpiKEERPCRWETVIAQ--DSASGDEEWEDDLAS-NSSPASIAKKTSRDSKKRK---REdlVHCPACSNLVPHNQINQH 178

                  ...
gi 1622957171 193 EDT 195
Cdd:COG5432   179 LDS 181

family of the cytolysin A (ClyA) family alpha pore-forming toxins (alpha-PFT) including Bacillus cereus HblB, Aeromonas hydrophila AhlB, Bacillus thuringiensis Cry6Aa and similar proteins; This family belongs to the ClyA family of alpha-PFT bacterial toxins. PFTs form the major group of virulence factors in many pathogenic bacteria and in general are critical components of the molecular offensive and defensive machinery of cells in all kingdoms of life. Bacterial PFTs facilitate the takeover of host resources by puncturing holes in the membrane. PFTs can be classified as alpha-PFTs and beta-PFTs depending on the secondary structures of their membrane component. Alpha-PFTs use a ring of amphipathic helices while beta-PFTs use a beta-barrel to construct the pore. Members of this family include the toxins: Bacillus cereus hemolysin binding component B (HblB or HBL-B) of the diarrheal enterotoxin hemolysin BL, Aeromonas hydrophila hemolytic (Ahl) component B (AhlB) of the tripartite AhlABC toxin, Vibrio cholerae cytotoxin motility associated killing factor A (MakA) cytotoxin, Xenorhabdus nematophila alpha-xenorhabdolysin (XaxA), Bacillus thuringiensis crystal 6Aa (Cry6Aa) parasporal crystal (Cry) toxin, and Bacillus cereus non-hemolytic enterotoxin (Nhe) component A (NheA) of the non-hemolytic enterotoxin Nhe, which, despite its name, is hemolytic, among others. In solution, ClyA proteins have an elongated, almost entirely alpha-helical structure, except for a short hydrophobic beta-hairpin known as the beta-tongue. Pore formation by ClyA requires circular oligomerization of the toxin by a sequential mechanism. This, in turn, concentrates the amphipathic helices in the center of the ring-like structure, forming a helical barrel that inserts into the membrane by a wedge-like mechanism. Compared with ClyA, NheA is almost entirely alpha-helical with an enlarged "head" domain, and an enlarged beta-tongue; it has been proposed that NheA could even form beta-barrel pores. Alpha-PFTs with similar structures are increasingly being found in eukaryotes, in particular as components of the immune systems of animals. This family may be distantly related to Escherichia coli alpha-PFT hemolysin E (HlyE, also known as ClyA or SheA).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 239 KEWSNSLEKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNESKILH-LQRVIDSQAEKLKELDKEIRPFRQ 317
Cdd:cd21116    47 LEWLNEIKPKLLSLPNDIIGYNNTFQSYYPDLIELADNLIKGDQGAKQQLLQGLEaLQSQVTKKQTSVTSFINELTTFKN 126

                          90       100       110       120       130
                  ....*....|....*....|....*....|....*....|....*....|...
gi 1622957171 318 NWEE-ADSMKSSVESLQNRVTELESVDKSAGQVARNTGLLESQLSRHDQMLSV 369
Cdd:cd21116   127 DLDDdSRNLQTDATKAQAQVAVLNALKNQLNSLAEQIDAAIDALEKLSNDWQT 179

Uncharacterized conserved protein, contains RING and CCCH-type Zn-fingers [General function prediction only];

                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 1622957171  19 LKLHTDRSAGTPIFAPEQGGYKEKFVKTvEDK----YKCEKCRLVLCSPKQTECGHRFCESCmAALLSSSSPKCTAC 91
Cdd:COG5152   162 LHDRSDFKTGWKLNQEWNAEYEEAPVIS-GPGekipFLCGICKKDYESPVVTECGHSFCSLC-AIRKYQKGDECGVC 236

Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF3 subfamily, TRAF domain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF3 was first described as a molecule that binds the cytoplasmic tail of CD40. However, it is not required for CD40 signaling. More recently, TRAF3 has been identified as a key regulator of type I interferon (IFN) production and the mammalian innate antiviral immunity. It mediates IFN responses in Toll-like receptor (TLR)-dependent as well as TLR-independent viral recognition pathways. It is also a key element in immunological homeostasis through its regulation of the anti-inflammatory cytokine interleukin-10. TRAF3 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 353 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 432
Cdd:cd03777     1 TGLLESQLSRHDQMLSVHDIRLADMDLRFQVLETASYNGVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCAR 80

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 433 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 512
Cdd:cd03777    81 VYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVTLMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVF 160

                         170       180
                  ....*....|....*....|....*.
gi 1622957171 513 VAQTVLENGTYIKDDTIFIKVIVDTS 538
Cdd:cd03777   161 VAQTVLENGTYIKDDTIFIKVIVDTS 186

Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF5 subfamily, TRAF domain, C-terminal MATH subdomain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF5 was identified as an activator of nuclear factor-kappaB and a regulator of lymphotoxin-beta receptor and CD40 signaling. Its interaction with CD40 is indirect, involving hetero-oligomerization with TRAF3. In addition, TRAF5 has been shown to associate with other TNFRs including CD27, CD30, OX40 and GITR (glucocorticoid-induced TNFR). It plays a role in modulating Th2 immune responses (driven by OX40 costimulation) and T-cell activation (triggered by GITR). It is also involved in osteoclastogenesis. TRAF5 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 391 GVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCARVYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVT 470
Cdd:cd03780     1 GKLIWKVTDYKMKKKEAVDGHTVSIFSQPFYTSRCGYRLCARAYLNGDGSGKGTHLSLYFVVMRGEFDSLLQWPFRQRVT 80

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1622957171 471 LMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVFVAQTVLENG--TYIKDDTIFIKVIVD 536
Cdd:cd03780    81 LMLLDQSGKKNHIMETFKADPNSSSFKRPDGEMNIASGCPRFVAHSVLENAknTYIKDDTLFLKVAVD 148

Tumor Necrosis Factor Receptor (TNFR) Associated Factor (TRAF) family, TRAF1 subfamily, TRAF domain, C-terminal MATH subdomain; TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF1 expression is the most restricted among the TRAFs. It is found exclusively in activated lymphocytes, dendritic cells and certain epithelia. TRAF1 associates, directly or indirectly through heterodimerization with TRAF2, with the TNFR family receptors TNFR-2, CD30, RANK, CD40 and LMP1, among others. It also binds the intracellular proteins TRADD, TANK, TRIP, RIP1, RIP2 and FLIP. TRAF1 is unique among the TRAFs in that it lacks a RING domain, which is critical for the activation of nuclear factor-kappaB and Jun NH2-terminal kinase. Studies on TRAF1-deficient mice suggest that TRAF1 has a negative regulatory role in TNFR-mediated signaling events. TRAF1 contains one zinc finger and one TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 391 GVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCARVYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVT 470
Cdd:cd03779     1 GTFLWKITDVSQKQRESSHGRDVSLCSPAFYTAKYGYKVCLRLYLNGDGAGKGTHISLFFVIMKGEYDALLPWPFRHKVT 80

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 1622957171 471 LMLMDQgSSRRHLGDAFKPDPNSSSFKKPTGEMNIASGCPVFVAQTVLEN--GTYIKDDTIFIKVIVD 536
Cdd:cd03779    81 FMLLDQ-NNREHVIDAFRPDLSSASFQRPVSDMNVASGCPLFFPLKKLQSpkHAYCKDDTIYIKCVVD 147

Tumor Necrosis Factor Receptor (TNFR)-Associated Factor (TRAF) family, TRAF6 subfamily, TRAF domain, C-terminal MATH subdomain; composed of proteins with similarity to human TRAF6, including the Drosophila protein DTRAF2. TRAF molecules serve as adapter proteins that link TNFRs and downstream kinase cascades resulting in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses. TRAF6 is the most divergent in its TRAF domain among the mammalian TRAFs. In addition to mediating TNFR family signaling, it is also an essential signaling molecule of the interleukin-1/Toll-like receptor superfamily. Whereas other TRAF molecules display similar and overlapping TNFR-binding specificities, TRAF6 binds completely different sites on receptors such as CD40 and RANK. TRAF6 serves as a molecular bridge between innate and adaptive immunity and plays a central role in osteoimmunology. DTRAF2, as an activator of nuclear factor-kappaB, plays a pivotal role in Drosophila development and innate immunity. TRAF6 contains a RING finger domain, five zinc finger domains, and a TRAF domain. The TRAF domain can be divided into a more divergent N-terminal alpha helical region (TRAF-N), and a highly conserved C-terminal MATH subdomain (TRAF-C) with an eight-stranded beta-sandwich structure. TRAF-N mediates trimerization while TRAF-C interacts with receptors.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 391 GVLIWKIRDYKRRKQEAVMGKTLSLYSQPFYTGYFGYKMCARVYLNGDGMGKGTHLSLFFVIMRGEYDALLPWPFKQKVT 470
Cdd:cd03776     1 GIYVWKIKNFSNLRRSMEAGSPVVIHSPGFYTSPPGYKLCARLNLSLPEARCPNYISLFVHLMQGENDSHLDWPFQGTIT 80

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 1622957171 471 LMLMDQGSSRRHLGDAFKPDPNSSSFKKPTGEMNIAS-GCPVFVAQTVLENGTYIKDDTIFIKVIV 535
Cdd:cd03776    81 LTLLDQSEPRQNIHETMMSKPELLAFQRPTTDRNPKGfGYVEFAHIEDLLQRGFVKNDTLLIKIEV 146

MATH (meprin and TRAF-C homology) domain; an independent folding unit with an eight-stranded beta-sandwich structure found in meprins, TRAFs and other proteins. Meprins comprise a class of extracellular metalloproteases which are anchored to the membrane and are capable of cleaving growth factors, extracellular matrix proteins, and biologically active peptides. TRAF molecules serve as adapter proteins that link cell surface receptors of the Tumor Necrosis Factor and 1nterleukin-1/Toll-like families to downstream kinase cascades, which results in the activation of transcription factors and the regulation of cell survival, proliferation and stress responses in the immune and inflammatory systems. Other members include the ubiquitin ligases, TRIM37 and SPOP, and the ubiquitin-specific proteases, HAUSP and Ubp21p. A large number of uncharacterized members mostly from lineage-specific expansions in C. elegans and rice contain MATH and BTB domains, similar to SPOP. The MATH domain has been shown to bind peptide/protein substrates in TRAFs and HAUSP. It is possible that the MATH domain in other members of this superfamily also interacts with various protein substrates. The TRAF domain may also be involved in the trimerization of TRAFs. Based on homology, it is postulated that the MATH domain in meprins may be involved in its tetramer assembly and that the MATH domain, in general, may take part in diverse modular arrangements defined by adjacent multimerization domains.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 391 GVLIWKIRDYKRRKQEavmgktlSLYSQPFYTGyfGYKMCARVYLNGDGmGKGTHLSLFFVIMRGEYDaLLPWPFKQKVT 470
Cdd:cd00121     1 GKHTWKIVNFSELEGE-------SIYSPPFEVG--GYKWRIRIYPNGDG-ESGDYLSLYLELDKGESD-LEKWSVRAEFT 69

                          90       100       110       120       130       140
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*.
gi 1622957171 471 LMLMDQgSSRRHLGDAFKPDPNSssfkkptgEMNIASGCPVFVAQTVLENGTYIKDDTIFIKVIVD 536
Cdd:cd00121    70 LKLVNQ-NGGKSLSKSFTHVFFS--------EKGSGWGFPKFISWDDLEDSYYLVDDSLTIEVEVK 126

Modified RING finger, HC subclass (C3HC3D-type), found in tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) and similar proteins; TRAF6, also known as interleukin-1 signal transducer or RING finger protein 85 (RNF85), is a cytoplasmic adapter protein that mediates signals induced by the tumor necrosis factor receptor (TNFR) superfamily and Toll-like receptor (TLR)/interleukin-1 receptor (IL-1R) family. It functions as a mediator involved in the activation of mitogen-activated protein kinase (MAPK), phosphoinositide 3-kinase (PI3K), and interferon regulatory factor pathways, as well as in IL-1R-mediated activation of NF-kappaB. TRAF6 is also an oncogene that plays a vital role in K-RAS-mediated oncogenesis. TRAF6 contains an N-terminal domain with a modified C3HC3D-type RING-HC finger and several zinc fingers, and a C-terminal TRAF domain that comprises a coiled coil domain and a conserved TRAF-C domain.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*...
gi 1622957171  50 KYKCEKCRLVLCSPKQTECGHRFCESCMAALLSSSSPKCTACQESVVRDKVFKDNCCK 107
Cdd:cd16643     1 KYECPICLMALREPVQTPCGHRFCKACILKSIREAGHKCPVDNEPLLENQLFPDNFAK 58

Modified RING finger, HC subclass (C3HC3D-type), found in tumor necrosis factor (TNF) receptor-associated factor 5 (TRAF5) and similar proteins; TRAF5, also known as RING finger protein 84 (RNF84), is an important signal transducer for a wide range of TNF receptor superfamily members, including tumor necrosis factor receptor 1 (TNFR1), TNFR2, CD40, and other lymphocyte costimulatory receptors, RANK/TRANCE-R, ectodysplasin-A Receptor (EDAR), lymphotoxin-beta receptor (LT-betaR), latent membrane protein 1 (LMP1), and IRE1. It functions as an activator of NF-kappaB, MAPK, and JNK, and is involved in both RANKL- and TNFalpha-induced osteoclastogenesis. It mediates CD40 signaling by associating with the cytoplasmic tail of CD40. It also negatively regulates Toll-like receptor (TLR) signaling and functions as a negative regulator of the interleukin 6 (IL-6) receptor signaling pathway that limits the differentiation of inflammatory CD4(+) T cells. TRAF5 contains an N-terminal domain with a modified C3HC3D-type RING-HC finger and several zinc fingers, and a C-terminal TRAF domain that comprises a coiled coil domain and a conserved TRAF-C domain.

                          10        20        30        40        50
                  ....*....|....*....|....*....|....*....|....*....|....*
gi 1622957171  48 EDKYKCEKCRLVLCSPKQTECGHRFCESCMAALLS-SSSPKCTACQESVVRDKVF 101
Cdd:cd16642     2 EDRYKCATCHFVLHNPHQTGCGHRFCQHCILSLLElNTTPICPIDKETIKSDEVF 56

RING finger, HC subclass, found in tumor necrosis factor (TNF) receptor-associated factor 2 (TRAF2) and similar proteins; TRAF2, also known as tumor necrosis factor type 2 receptor-associated protein 3, is an E3 ubiquitin-protein ligase that was identified as a 75 kDa tumor necrosis factor receptor (TNF-R2)-associated signaling protein. It interacts with members of the TNF receptor superfamily and connects the receptors to downstream signaling proteins. It also mediates K63-linked polyubiquitination of RIP1, a kinase pivotal in TNFalpha-induced NF-kappaB activation. Moreover, TRAF2 regulates peripheral CD8(+) T-cell and NKT-cell homeostasis by modulating sensitivity to IL-15. It also acts as an important biological suppressor of necroptosis. It inhibits TNF-related apoptosis inducing ligand (TRAIL)- and CD95L-induced apoptosis and necroptosis. TRAF2 contains an N-terminal domain with a typical C3HC4-type RING-HC finger and several zinc fingers, and a C-terminal TRAF domain that comprises a coiled coil domain and a conserved TRAF-C domain.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|..
gi 1622957171  50 KYKCEKCRLVLCSPKQTECGHRFCESCMAALLSSSSPKCTAC 91
Cdd:cd16639     1 KYLCSDCRNILRRPFQAQCGHRYCSYCLKKILSSGPQKCAAC 42

RIM-binding protein of the cytomatrix active zone; This is a family of proteins that form part of the CAZ (cytomatrix at the active zone) complex which is involved in determining the site of synaptic vesicle fusion. The C-terminus is a PDZ-binding motif that binds directly to RIM (a small G protein Rab-3A effector). The family also contains four coiled-coil domains.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 219 TNQQikaheaSSAVQHVNLLKEWSNSLEKKVSLLQNES--------------VEKNKSIQSLHNQICSFEIEIERQKEML 284
Cdd:pfam10174 316 TNQN------SDCKQHIEVLKESLTAKEQRAAILQTEVdalrlrleekesflNKKTKQLQDLTEEKSTLAGEIRDLKDML 389

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 285 RNNESKILHLQRVIDSQAEKLKELDKEIrpfrqnweeaDSMKSSVESLQ----NRVTELESVDKSAGQVARNTGLLESQL 360
Cdd:pfam10174 390 DVKERKINVLQKKIENLQEQLRDKDKQL----------AGLKERVKSLQtdssNTDTALTTLEEALSEKERIIERLKEQR 459

                  ....*
gi 1622957171 361 SRHDQ 365
Cdd:pfam10174 460 EREDR 464

Meprin family, Beta subunit, MATH domain; Meprins are multidomain extracellular metalloproteases capable of cleaving growth factors, cytokines, extracellular matrix proteins, and biologically active peptides. They are composed of two related subunits, alpha and beta, which form homo- or hetro-complexes where the basic unit is a disulfide-linked dimer. The beta subunit is a type I membrane protein, which forms homodimers or heterotetramers (alpha2beta2 or alpha3beta). Meprin beta shows preference for acidic residues at the P1 and P1' sites of its substrate. Among its best substrates are growth factors and chemokines such as gastrin and osteopontin. Both alpha and beta subunits contain a catalytic astacin (M12 family) protease domain followed by the adhesion or interaction domains MAM, MATH and AM. The MATH and MAM domains provide symmetrical intersubunit disulfide bonds necessary for the dimerization of meprin subunits. The MATH domain may also be required for folding of an activable zymogen.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 394 IWKIRDYKRrkqeaVMGKTL---SLYSQPFYTGYfGYKMCARVYLNGDGMGKGtHLSLFFVIMRGEYDALLPWPFK-QKV 469
Cdd:cd03782     5 IWHIRNFTQ-----LLATTPpngKIYSPPFLSST-GYSFQVGLYLNGTDDYPG-NLAIYLHLTSGPNDDQLQWPCPwQQA 77

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 470 TLMLMDQGSS-RRHLG-------DAFK--------------------PDPNSSSFKKPTGemniaSGCPVFVAQTVLENG 521
Cdd:cd03782    78 TMMLLDQHPDiRQRMSnqrsvttDPNMtstdsdeyfwddprkvgsevTDTDGSTFYRGPG-----YGTSAFITHLRLRSR 152

                         170
                  ....*....|
gi 1622957171 522 TYIKDDTIFI 531
Cdd:cd03782   153 DFIKGDDVIF 162

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 1622957171  51 YKCEKCRLVLCSPKQTECGHRFCESCMAALLSSSSPKCTAC 91
Cdd:cd16449     1 LECPICLERLKDPVLLPCGHVFCRECIRRLLESGSIKCPIC 41

Chromosome segregation protein NDC80, interacts with SMC proteins [Cell cycle control, cell division, chromosome partitioning];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 220 NQQIKAHEASSAVQHVNLLKEWSNSLEKKVSLLQ---NESVEKN---KSIQSLHNQICSFEI--EIERQKemlRNNESKI 291
Cdd:COG5185   262 NTDLRLEKLGENAESSKRLNENANNLIKQFENTKekiAEYTKSIdikKATESLEEQLAAAEAeqELEESK---RETETGI 338

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 292 LHLQRVIDSQAEKLKELDKEIRP----------FRQNWEEADSMKSSVESL-----QNRVTELESVDKSAGQVARNTGLL 356
Cdd:COG5185   339 QNLTAEIEQGQESLTENLEAIKEeienivgeveLSKSSEELDSFKDTIESTkesldEIPQNQRGYAQEILATLEDTLKAA 418

                  ....*..
gi 1622957171 357 ESQLSRH 363
Cdd:COG5185   419 DRQIEEL 425

helix-rich Mycoplasma protein; Members of this family occur strictly within a subset of Mycoplasma species. Members average 750 amino acids in length, including signal peptide. Sequences are predicted (Jpred 3) to be almost entirely alpha-helical. These sequences show strong periodicity (consistent with long alpha helical structures) and low complexity rich in D,E,N,Q, and K. Genes encoding these proteins are often found in tandem. The function is unknown.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 235 VNLLKEWSNSLEKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNESKILHLQRVIDSQAEKLKELDKEIRP 314
Cdd:TIGR04523 220 ISELKKQNNQLKDNIEKKQQEINEKTTEISNTQTQLNQLKDEQNKIKKQLSEKQKELEQNNKKIKELEKQLNQLKSEISD 299

                          90       100       110
                  ....*....|....*....|....*....|.
gi 1622957171 315 FR----QNWEEadSMKSSVESLQNRVTELES 341
Cdd:TIGR04523 300 LNnqkeQDWNK--ELKSELKNQEKKLEEIQN 328

helix-rich Mycoplasma protein; Members of this family occur strictly within a subset of Mycoplasma species. Members average 750 amino acids in length, including signal peptide. Sequences are predicted (Jpred 3) to be almost entirely alpha-helical. These sequences show strong periodicity (consistent with long alpha helical structures) and low complexity rich in D,E,N,Q, and K. Genes encoding these proteins are often found in tandem. The function is unknown.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 236 NLLKEWSNSLEKKVSLLQNESVEKNKSIQSLHNQICSfeieIERQKEMLRNNESKIlhlQRVIdsqAEKLKELDKEIRpf 315
Cdd:TIGR04523 310 KELKSELKNQEKKLEEIQNQISQNNKIISQLNEQISQ----LKKELTNSESENSEK---QREL---EEKQNEIEKLKK-- 377

                          90       100
                  ....*....|....*....|....*.
gi 1622957171 316 rqnweEADSMKSSVESLQNRVTELES 341
Cdd:TIGR04523 378 -----ENQSYKQEIKNLESQINDLES 398

Meprin family, Alpha subunit, MATH domain; Meprins are multidomain extracellular metalloproteases capable of cleaving growth factors, cytokines, extracellular matrix proteins, and biologically active peptides. They are composed of two related subunits, alpha and beta, which form homo- or hetro-complexes where the basic unit is a disulfide-linked dimer. The alpha subunit is synthesized as a membrane spanning protein, however, it is cleaved during biosynthesis and loses its transmembrane domain. It oligomerizes into large complexes, containing 10-100 subunits (dimers that associate noncovalently), which are secreted as latent proteases and can move through extracellular spaces in a nondestructive manner. This allows delivery of the concentrated protease to sites containing activating enzymes, such as sites of inflammation, infection or cancerous growth. Meprin alpha shows preference for small or hydrophobic residues at the P1 and P1' sites of its substrate. Both alpha and beta subunits contain a catalytic astacin (M12 family) protease domain followed by the adhesion or interaction domains MAM, MATH and AM. The MATH and MAM domains provide symmetrical intersubunit disulfide bonds necessary for the dimerization of meprin subunits. The MATH domain may also be required for folding of an activable zymogen.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 394 IWKIRDYKRRKQEAVmgKTLSLYSQPFYTGYfGYKMCARVY-LNGDGMGKGTHLSLFFVIMRGEYDALLPWP-FKQKVTL 471
Cdd:cd03783     5 VWRVRNFSQILENTT--KGDVLQSPRFYSPE-GYGYGVSLYpLSNESDYSGNYTGLYFHLCSGENDAVLEWPaLNRQAII 81

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 472 MLMDQ--------GSSRRHLGDAFKPDP---NSSSFKKPT--GEMNIASGC--------PVFVAQTVLENGTYIKDDTIF 530
Cdd:cd03783    82 TVLDQdpdvrlrmSSSRSFTTDKSQTSSainGTLRWDRPSrvGTYDTSCDCfrgidfgwSTFISHSQLRRRSFLKNDDLI 161

                  ...
gi 1622957171 531 IKV 533
Cdd:cd03783   162 IFV 164

Modified RING finger, HC subclass (C3HC3D-type), found in tumor necrosis factor (TNF) receptor-associated factor 4 (TRAF4) and similar proteins; TRAF4, also known as cysteine-rich domain associated with RING and Traf domains protein 1, metastatic lymph node gene 62 protein (MLN 62), or RING finger protein 83 (RNF83), is a member of the TRAF protein family, which mainly function in the immune system, where they mediate signaling through tumor necrosis factor receptors (TNFRs) and interleukin-1/Toll-like receptors (IL-1/TLRs). It also plays a critical role in nervous system, as well as in carcinogenesis. TRAF4 promotes the growth and invasion of colon cancer through the Wnt/beta-catenin pathway. It contributes to the TNFalpha-induced activation of the 70 kDa ribosomal protein S6 kinase (p70s6k) signaling pathway, and activation of transforming growth factor beta (TGF-beta)-induced SMAD-dependent signaling and non-SMAD signaling in breast cancer. It also enhances osteosarcoma cell proliferation and invasion by the Akt signaling pathway. Moreover, TRAF4 is a novel phosphoinositide-binding protein modulating tight junctions and favoring cell migration. TRAF4 contains an N-terminal domain with a modified C3HC3D-type RING-HC finger and several zinc fingers, and a C-terminal TRAF domain that comprises a coiled coil domain and a conserved TRAF-C domain.

                          10        20        30        40
                  ....*....|....*....|....*....|....*....|
gi 1622957171  50 KYKCEKCRLVLCSPKQ-TECGHRFCESCMAALLSSSSPKC 88
Cdd:cd16641     1 RLLCPLCRLPMREPVQiSTCGHRFCDTCLQEFLSEGVFKC 40

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 1622957171  44 VKTVEDKYKCEKCRLVLCSPKQTECGHRFCESCMAALLsSSSPKCTAC----QESVVR 97
Cdd:TIGR00599  20 LYPLDTSLRCHICKDFFDVPVLTSCSHTFCSLCIRRCL-SNQPKCPLCraedQESKLR 76

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 1622957171  52 KCEKCRLVLCSPKQTECGHRFCESCmAALLSSSSPKCTACQE 93
Cdd:cd16539     7 ACFICRKPFKNPVVTKCGHYFCEKC-ALKHYRKSKKCFVCGK 47

RING-finger-containing E3 ubiquitin ligase [Signal transduction mechanisms];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171  52 KCEKCRLVLCSPKQTECGHRFCESCMAALLsSSSPKCTACQESvVRDKVFKDNCCKREIL------------ALQIYCR- 118
Cdd:COG5432    27 RCRICDCRISIPCETTCGHTFCSLCIRRHL-GTQPFCPVCRED-PCESRLRGSSGSREINesharnrdllrkVLESLCRl 104

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 119 ----NESRGCAEQLTLGHllVHLKNDCHFEELPCVrADCKEKVLRKDLRDHVEKAckyRE--ATCSHCKSQVPMIALQKH 192
Cdd:COG5432   105 prpiKEERPCRWETVIAQ--DSASGDEEWEDDLAS-NSSPASIAKKTSRDSKKRK---REdlVHCPACSNLVPHNQINQH 178

                  ...
gi 1622957171 193 EDT 195
Cdd:COG5432   179 LDS 181

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
                  ....*....|....*....|....*....|....*....|....*..
gi 1622957171  53 CEKCRLVLCSPKQTECGHRFCESCMAALLSSSSPK--CTACQESVVR 97
Cdd:cd16498    19 CPICLELLKEPVSTKCDHQFCRFCILKLLQKKKKPapCPLCKKSVTK 65

helix-rich Mycoplasma protein; Members of this family occur strictly within a subset of Mycoplasma species. Members average 750 amino acids in length, including signal peptide. Sequences are predicted (Jpred 3) to be almost entirely alpha-helical. These sequences show strong periodicity (consistent with long alpha helical structures) and low complexity rich in D,E,N,Q, and K. Genes encoding these proteins are often found in tandem. The function is unknown.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 246 EKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNESKILHLQRVIDSQAEKLKELDKEIRPFRQNWEEADSM 325
Cdd:TIGR04523 553 ELKKENLEKEIDEKNKEIEELKQTQKSLKKKQEEKQELIDQKEKEKKDLIKEIEEKEKKISSLEKELEKAKKENEKLSSI 632

                          90
                  ....*....|....
gi 1622957171 326 KSSVESLQNRVTEL 339
Cdd:TIGR04523 633 IKNIKSKKNKLKQE 646

family of the cytolysin A (ClyA) family alpha pore-forming toxins (alpha-PFT) including Bacillus cereus HblB, Aeromonas hydrophila AhlB, Bacillus thuringiensis Cry6Aa and similar proteins; This family belongs to the ClyA family of alpha-PFT bacterial toxins. PFTs form the major group of virulence factors in many pathogenic bacteria and in general are critical components of the molecular offensive and defensive machinery of cells in all kingdoms of life. Bacterial PFTs facilitate the takeover of host resources by puncturing holes in the membrane. PFTs can be classified as alpha-PFTs and beta-PFTs depending on the secondary structures of their membrane component. Alpha-PFTs use a ring of amphipathic helices while beta-PFTs use a beta-barrel to construct the pore. Members of this family include the toxins: Bacillus cereus hemolysin binding component B (HblB or HBL-B) of the diarrheal enterotoxin hemolysin BL, Aeromonas hydrophila hemolytic (Ahl) component B (AhlB) of the tripartite AhlABC toxin, Vibrio cholerae cytotoxin motility associated killing factor A (MakA) cytotoxin, Xenorhabdus nematophila alpha-xenorhabdolysin (XaxA), Bacillus thuringiensis crystal 6Aa (Cry6Aa) parasporal crystal (Cry) toxin, and Bacillus cereus non-hemolytic enterotoxin (Nhe) component A (NheA) of the non-hemolytic enterotoxin Nhe, which, despite its name, is hemolytic, among others. In solution, ClyA proteins have an elongated, almost entirely alpha-helical structure, except for a short hydrophobic beta-hairpin known as the beta-tongue. Pore formation by ClyA requires circular oligomerization of the toxin by a sequential mechanism. This, in turn, concentrates the amphipathic helices in the center of the ring-like structure, forming a helical barrel that inserts into the membrane by a wedge-like mechanism. Compared with ClyA, NheA is almost entirely alpha-helical with an enlarged "head" domain, and an enlarged beta-tongue; it has been proposed that NheA could even form beta-barrel pores. Alpha-PFTs with similar structures are increasingly being found in eukaryotes, in particular as components of the immune systems of animals. This family may be distantly related to Escherichia coli alpha-PFT hemolysin E (HlyE, also known as ClyA or SheA).

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 239 KEWSNSLEKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNESKILH-LQRVIDSQAEKLKELDKEIRPFRQ 317
Cdd:cd21116    47 LEWLNEIKPKLLSLPNDIIGYNNTFQSYYPDLIELADNLIKGDQGAKQQLLQGLEaLQSQVTKKQTSVTSFINELTTFKN 126

                          90       100       110       120       130
                  ....*....|....*....|....*....|....*....|....*....|...
gi 1622957171 318 NWEE-ADSMKSSVESLQNRVTELESVDKSAGQVARNTGLLESQLSRHDQMLSV 369
Cdd:cd21116   127 DLDDdSRNLQTDATKAQAQVAVLNALKNQLNSLAEQIDAAIDALEKLSNDWQT 179

Predicted nucleic acid-binding protein DR0291, contains C4-type Zn-ribbon domain [General function prediction only];

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1622957171 245 LEKKVSLLQNESVEKNKSIQSLHNQICSFEIEIERQKEMLRNNESKILH---------LQRVIDSQAEKLKELDKEIRPF 315
Cdd:COG1579    36 LEDELAALEARLEAAKTELEDLEKEIKRLELEIEEVEARIKKYEEQLGNvrnnkeyeaLQKEIESLKRRISDLEDEILEL 115

                          90       100
                  ....*....|....*....|....*.
gi 1622957171 316 rqnWEEADSMKSSVESLQNRVTELES 341
Cdd:COG1579   116 ---MERIEELEEELAELEAELAELEA 138

Zinc finger, C3HC4 type (RING finger); The C3HC4 type zinc-finger (RING finger) is a cysteine-rich domain of 40 to 60 residues that coordinates two zinc ions, and has the consensus sequence: C-X2-C-X(9-39)-C-X(1-3)-H-X(2-3)-C-X2-C-X(4-48)-C-X2-C where X is any amino acid. Many proteins containing a RING finger play a key role in the ubiquitination pathway.

                          10        20
                  ....*....|....*....|....*...
gi 1622957171  64 KQTECGHRFCESCMAALLSSSSPKCTAC 91
Cdd:pfam00097  13 TLLPCGHLFCSKCIRSWLESGNVTCPLC 40