F-box domain found in F-box/LRR-repeat protein 1 (FBXL1) and similar proteins; FBXL1, also called S-phase kinase-associated protein 2, cyclin-A/CDK2-associated protein p45, F-box protein Skp2, or p45skp2, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins involved in cell cycle progression, signal transduction and transcription. It specifically recognizes phosphorylated CDKN1B/p27kip and is involved in regulation of G1/S transition. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|.
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22114   1 WDSLPDELLLGIFSCLCLPDLLKVSQVCKRWYRLASDESLW 41

F-box domain found in F-box/LRR-repeat protein 1 (FBXL1) and similar proteins; FBXL1, also called S-phase kinase-associated protein 2, cyclin-A/CDK2-associated protein p45, F-box protein Skp2, or p45skp2, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins involved in cell cycle progression, signal transduction and transcription. It specifically recognizes phosphorylated CDKN1B/p27kip and is involved in regulation of G1/S transition. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|.
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22114   1 WDSLPDELLLGIFSCLCLPDLLKVSQVCKRWYRLASDESLW 41

A Receptor for Ubiquitination Targets;

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|.
gi 16306595    100 LPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:smart00256   1 LPDEILEEILSKLDPKDLLRLRKVSRKWRSLIDSHDFWFKL 41

F-box/LRR-repeat protein 18, LRR; This entry represents the leucine-rich repeats (LRR) from F-box/LRR repeat protein 18 (also known as F-box and leucine-rich repeat protein 18, FBXL18), associated with F-box domains. This protein is the substrate-recognition component of the SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex through its F-box and the LRR motifs mediate the protein-protein interactions required for the binding of the specific substrates by SCFs complexes.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 16306595   209 QNLSLEGLRLSDPIVNTLA-----KNSNLVRLNLSGCSGFSEFALQTLLSS---CSRLDELNLSWCfdftekhvqvavAH 280
Cdd:pfam19729 205 KNVSLEALQLPRSWLNGSSllqhlKFSNPFYLSFSRCTLSGGQLIQRVLNGgkdLRSLVSLNLSGC------------VH 272

                          90       100       110       120       130       140       150
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 16306595   281 VseTITQLNLSGYRKNLQKSDLSTLVRRCPNLVHLDLS-----DSVMLKNDCFQEFFQLNYLQHLSLSRC 345
Cdd:pfam19729 273 C--LLPDSLLRKAEDDIDSSIVETLVACCPNLRHLNLSaahhhSSEGLGGHLCALLARLKHLRSLSLPVC 340

F-box domain found in F-box/LRR-repeat protein 1 (FBXL1) and similar proteins; FBXL1, also called S-phase kinase-associated protein 2, cyclin-A/CDK2-associated protein p45, F-box protein Skp2, or p45skp2, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins involved in cell cycle progression, signal transduction and transcription. It specifically recognizes phosphorylated CDKN1B/p27kip and is involved in regulation of G1/S transition. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|.
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22114   1 WDSLPDELLLGIFSCLCLPDLLKVSQVCKRWYRLASDESLW 41

F-box domain found in F-box/WD repeat-containing protein 5 (FBXW5) and similar proteins; FBXW5, also called F-box and WD-40 domain-containing protein 5, is the substrate-recognition component of both SCF (SKP1-CUL1-F-box protein) and DCX (DDB1-CUL4-X-box) E3 ubiquitin-protein ligase complexes. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:cd22132   1 WPLLPDSLLLHIFSYLSPKDLLAAGQVCKQWYRVSRDEFLWKEL 44

F-box domain found in F-box/LRR-repeat protein 12 (FBXL12) and similar proteins; FBXL12, also called F-box and leucine-rich repeat protein 12, or F-box protein FBL12, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. It mediates the polyubiquitination and proteasomal degradation of calcium/calmodulin dependent protein kinase I (CAMK1) leading to disruption of cyclin D1/CDK4 complex assembly, which results in G1 cell cycle arrest in lung epithelia. It regulates T-cell differentiation in a cell-autonomous manner. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22123   2 DQLPENVLLEILSYLPVRDLLRISRVCKRWRRLVYDKTLW 41

F-box domain found in F-box/LRR-repeat protein 7 (FBXL7) and similar proteins; FBXL7, also called F-box and leucine-rich repeat protein 7, or F-box protein FBL6/FBL7, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of Aurora kinase A (AURKA) during mitosis, causing mitotic arrest. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|...
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:cd22120   2 DRLPDDVILQIFSHLPTNQLCRCARVCRRWYNLAWDPRLWTTI 44

F-box domain superfamily; This short domain is commonly found at the N-terminus of various proteins, and typically co-occurs with one or more other conserved domains or motifs, such as leucine rich repeats, WD40 repeats, kelch, tub, spry, and others. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression. One of the best researched roles of F-box proteins is their participation in SCF (Skp1-Cul1-F-box protein), a multi-protein complex that functions as a ubiquitin E3 ligase, where the role of the F-box protein is to recruit target substrates. Gene families containing the F-box are found greatly expanded in narrow taxonomic lineages, such as flowering plants and nematodes. In this hierarchical classification, many of the subfamilies are named according to their domain architectures.

                        10        20        30
                ....*....|....*....|....*....|....*
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLAS 132
Cdd:cd09917   1 SDLPDEILLKILSYLDPRDLLRLSLVCKRWRELAS 35

F-box domain found in F-box/LRR-repeat protein 6 (FBXL6) and similar proteins; FBXL6, also called F-box and leucine-rich repeat protein 6, or F-box protein FBL6 (FBL6A), is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....*..
gi 16306595  97 WDSLPDELLLGIFSCLC-----LPELLKVSGVCKRWYRLASDESLWQ 138
Cdd:cd22119   1 GQRLPPEILVKIFQFAVategaVPLLCRLSRVCRLWREVALDPSLWT 47

F-box domain found in F-box only protein 15 (FBXO15) and similar proteins; FBXO15, also called FBX15, has a novel dual molecular function by controlling transcriptional repression and being part of SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligases, which is essential for stress response, gliotoxin production and virulence in the opportunistic human pathogen Aspergillus fumigatus. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22093   2 ERLPSEILLKILSYLDASSLLCISCVNKLFYQLANDNALW 41

A Receptor for Ubiquitination Targets;

                           10        20        30        40
                   ....*....|....*....|....*....|....*....|.
gi 16306595    100 LPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:smart00256   1 LPDEILEEILSKLDPKDLLRLRKVSRKWRSLIDSHDFWFKL 41

F-box domain found in F-box/LRR-repeat protein 5 (FBXL5) and similar proteins; FBXL5, also called F-box and leucine-rich repeat protein 5, F-box protein FBL4/FBL5, or p45SKP2-like protein, is the substrate-recognition component of an SCF (SKP1-cullin-F-box) protein ligase complex that plays a central role in iron homeostasis by promoting the ubiquitination and subsequent degradation of IREB2/IRP2. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22118   2 SSLPPEIMLKIFSYLNPQDLCRCAQVCTKWSQLARDGSLW 41

F-box domain found in F-box only protein 13 (FBXO13) and similar proteins; FBXO13, also called FBX13, F-box/LRR-repeat protein 17 (FBL17), or F-box and leucine-rich repeat protein 17 (FBXL17), is the substrate-recognition component of SCF(FBXL17) E3 ubiquitin ligase complex, a key component of a quality control pathway required to ensure functional dimerization of BTB domain-containing proteins (dimerization quality control, DQC). The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....*..
gi 16306595  98 DSLPDELLLGIFSCLCLPE-LLKVSGVCKRWYRLASDESLWQTLDLT 143
Cdd:cd22092   3 NQLPDSILLKIFSYLSLQErCLSASLVCKYWRDLCLDSQFWKQIDLS 49

F-box domain found in Saccharomyces cerevisiae mitochondrial F-box protein MFB1 (ScMFB1) and similar proteins; ScMFB1 is a novel mitochondria-associated F-box protein that functions to increase mitochondrial connectivity in yeast. ScMFB1 acts as a key component of a Skp1-Cdc53/Cullin-F-box protein (SCF) ubiquitin ligase complex machinery that regulates mitochondrial dynamics throughout the yeast's entire life cycle. It interacts with Skp1p in an F-box-dependent manner. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30
                ....*....|....*....|....*....|....*....
gi 16306595 100 LPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQ 138
Cdd:cd22146   4 LPLEILFEILIYLDIPDILNLSKTCRFLYVLLNDEILWR 42

F-box domain found in Arabidopsis thaliana protein ARABIDILLO 1 (AtADLO1) and similar proteins; AtADLO1, also called F-box only protein 5 (FBX5), promotes lateral root initiation and development, independently of auxin (IAA) and abscisic acid (ABA). The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|.
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22155   2 WTLLPDDTVLGLFGLLNYRDRASLASVCRAWRALGSSHSLW 42

F-box domain found in F-box/WD repeat-containing protein 12 (FBXW12) and similar proteins; FBXW12, also called F-box and WD-40 domain-containing protein 12, or F-box only protein 35 (FBXO35), is the substrate-recognition component of the SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex that mediates the ubiquitination and subsequent proteasomal degradation of target proteins. It functions as an epithelial growth suppressor. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|..
gi 16306595  99 SLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:cd22137   2 QLPDLPMLRIFSFLDAFSLLQAAQVNKQWNKVADSDYLWRNL 43

F-box domain found in F-box/LRR-repeat protein 4 (FBXL4) and similar proteins; FBXL4, also called F-box and leucine-rich repeat protein 4, or F-box protein FBL4/FBL5, is part of an SCF (SKP1-cullin-F-box) protein ligase complex. It serves as a clock output molecule that regulates sleep through promotion of rhythmic degradation of the GABA(A) receptor. Biallelic pathogenic variants in FBXL4 are associated with an encephalopathic mtDNA maintenance defect syndrome that is a multi-system disease characterized by lactic acidemia, developmental delay, and hypotonia. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....*
gi 16306595  98 DSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTLDL 142
Cdd:cd22117   2 DLLPYELIQLILSYLDLPSLCRLSQTCKLFRKHCYDPLLWKELNL 46

F-box domain found in F-box only protein 18 (FBXO18) and similar proteins; FBXO18, also called FBX18, or F-box DNA helicase 1 (FBH1), is a 3'-5' DNA helicase and the substrate-recognition component of the SCF(FBH1) E3 ubiquitin ligase complex that plays a key role in response to stalled/damaged replication forks. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30
                ....*....|....*....|....*....|....*....
gi 16306595  98 DSLPDELLLGIFSCLCLPELLK-VSGVCKRWYRLASDES 135
Cdd:cd22095   3 QQLPEELLRNIFAFLPAEDLYQnISLVCRHWRDIVSDPL 41

F-box domain found in F-box/WD repeat-containing protein 9 (FBXW9) and similar proteins; FBXW9, also called F-box and WD-40 domain-containing protein 9, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex that mediates the ubiquitination and subsequent proteasomal degradation of target proteins. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....
gi 16306595  97 WDSLPDELLLGIFSCLCLPELLKV-SGVCKRWYRLASDESLWQT 139
Cdd:cd22135   1 LLSLPPELLLHICSYLDARFVLHVlPLVCKTFRDILSDETTWRI 44

F-box domain found in F-box only protein 36 (FBXO36) and similar proteins; FBXO36, also called FBX36, likely functions as the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30
                ....*....|....*....|....*....|....*....
gi 16306595 100 LPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQ 138
Cdd:cd22106   4 LPDKLLLYIISYLDLEDIARLSQTSKRFKKLCNSDELWE 42

F-box domain found in Saccharomyces cerevisiae cell division control protein 4 (ScCDC4) and similar proteins; ScCDC4 is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. It is essential for initiation of DNA replication and separation of the spindle pole bodies to form the poles of the mitotic spindle. It also plays a role in bud development, fusion of zygotic nuclei after conjugation and various aspects of sporulation. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|..
gi 16306595  99 SLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:cd22141   3 NLPFEISLKIFNYLQFEDLLNSLGVSKKWNKIIRNTALWKKL 44

F-box domain found in Schizosaccharomyces pombe Skp1-binding protein 1 (SpPof1) and similar proteins; SpPof1, also called F-box/WD repeat-containing protein pof1, probably recognizes and binds to some phosphorylated proteins and promotes their ubiquitination and degradation. It is required for the inactivation of zip1 via ubiquitination. This subfamily also includes Saccharomyces cerevisiae methionine-requiring protein 30 (ScMET30, also called E3 ubiquitin ligase complex SCF(Met30) subunit MET30), Aspergillus niger sulfur controller B (AnSCONB, also called sulfur metabolite repression control protein B) and Neurospora crassa sulfur controller 2 (NcSCON2, also called sulfur metabolite repression control protein 2). ScMET30 acts as a transcriptional inhibitor that negatively regulates the expression of sulfur amino acid biosynthesis genes. It controls cell cycle function (being required for the G1/S transition and M-phase but not the S-phase), sulfur metabolism, and methionine biosynthesis as part of the E3 ubiquitin ligase complex SCF(Met30). AnSCONB and NcSCON2 are components of the SCF (sconB/scon-2) E3 ubiquitin ligase complexes involved in the regulation of sulfur metabolite repression, probably by mediating the inactivation or degradation of the metR transcription factor. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|.
gi 16306595 100 LPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQTL 140
Cdd:cd22147   5 LPVELSLKILSYLDAKSLCRAAQVSKKWRNLADDDELWKRM 45

F-box domain found in F-box only protein 41 (FBXO41) and similar proteins; FBXO41, also called FBX41, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. It acts as a novel central nervous system (CNS)-specific F-box protein that localizes to the centrosome and the cytoplasm of neurons and promotes neuronal migration. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|....
gi 16306595  96 SWDSLP-DELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLWQ 138
Cdd:cd22109   1 SLESLRrRDALFCVFSYLDTKSLLRCAEVCREWRDVSRHPALWQ 44

F-box domain found in F-box only protein 42 (FBXO42) and similar proteins; FBXO42, also called FBX42, or just one F-box and Kelch domain-containing protein (JFK), is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. It specifically recognizes p53/TP53, promoting its ubiquitination and degradation. FBXO42 is also involved in the ubiquitin-proteasome system that may play a role in the pathogenesis of Parkinson's disease (PD). The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30
                ....*....|....*....|....*....|....*..
gi 16306595  98 DSLPDELLLGIFSCLCL-PELLKVSGVCKRWYRLASD 133
Cdd:cd22110   2 NDLPEEILEYILSYLSPyGDLKSAALVCKRWHRIIKG 38

F-box domain found in the JmjC domain-containing histone demethylation protein (JHDM) family; The JHDM family includes F-box/LRR-repeat proteins FBXL10, FBXL11 and FBXL19. FBXL10 is also called lysine-specific demethylase 2B (KDM2B), CXXC-type zinc finger protein 2 (CXXC2), F-box and leucine-rich repeat protein 10 (FBL10), JmjC domain-containing histone demethylation protein 1B (JHDM1B), Jumonji domain-containing EMSY-interactor methyltransferase motif protein, protein JEMMA, protein-containing CXXC domain 2, [Histone-H3]-lysine-36 demethylase 1B, or NDY1. It is a histone demethylase that catalyzes the demethylation of H3K4me3 and H3K36me2, thereby playing a central role in the histone code. It preferentially binds the transcribed region of ribosomal RNA and represses the transcription of ribosomal RNA genes which inhibits cell growth and proliferation. FBXL10 may also serve as the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. FBXL11, also called KDM2A, CXXC8, F-box and leucine-rich repeat protein 11, F-box protein FBL7, F-box protein Lilina, JmjC domain-containing histone demethylation protein 1A (JHDM1A), or [Histone-H3]-lysine-36 demethylase 1A, is a histone H3 lysine 36 (H3K36) demethylase that regulates epithelial mesenchymal transition (EMT) and the metastasis of ovarian cancer. It plays an essential role in embryonic development and homeostasis by regulating cell proliferation and survival. FBXL11 may also recognize and bind to some phosphorylated proteins and promote their ubiquitination and degradation. It associates with centromeres and represses transcription of small non-coding RNAs that are encoded by the clusters of satellite repeats at the centromere. It is required to sustain centromeric integrity and genomic stability, particularly during mitosis. FBXL19, also called F-box and leucine-rich repeat protein 19, is the substrate-recognition component of an SCF-type E3 ubiquitin ligase complex. It acts as a CpG island-binding protein in mouse embryonic stem (ES) cells and has been shown to associate with the CDK-Mediator complex. It promotes H2Bub1 at the promoters of CpG island-containing genes by interacting with RNF20. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30
                ....*....|....*....|....*....|....*....
gi 16306595  99 SLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22122   3 VLPREVWLPVFQYLSPKDLCVCMRVCKTWNRWCCDPSLW 41

F-box domain found in F-box/LRR-repeat protein 21 (FBXL21) and similar proteins; FBXL21, also called F-box and leucine-rich repeat protein 21, F-box and leucine-rich repeat protein 3B (FBXL3B), or F-box/LRR-repeat protein 3B, is the substrate-recognition component of the SCF(FBXL21) E3 ubiquitin ligase complex that mainly acts in the cytosol and mediates ubiquitination of CRY proteins (CRY1 and CRY2), leading to CRY protein stabilization, and thus, is involved in circadian rhythm function. It regulates the oscillation of the circadian clock through ubiquitination and stabilization of cryptochromes. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                        10        20        30        40
                ....*....|....*....|....*....|....*....|...
gi 16306595  95 VSWDSLPDELLLGIFSCLCLPELLKVSGVCKRWYRLASDESLW 137
Cdd:cd22179   1 LDWGNLPHHVVLHIFQYLPLVDRARASSVCRRWNEVFHIPDLW 43

Leucine-rich repeat (LRR) protein [Transcription];

                        10        20        30        40        50        60        70        80
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 16306595 184 QHMDLSNSviEVSTLHGILSQCSKLQNLSLEGLRLSDpIVNTLAKNSNLVRLNLSGCSgFSEFALQtlLSSCSRLDELNL 263
Cdd:COG4886 139 KELDLSNN--QLTDLPEPLGNLTNLKSLDLSNNQLTD-LPEELGNLTNLKELDLSNNQ-ITDLPEP--LGNLTNLEELDL 212

                        90       100       110       120       130       140       150       160
                ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 16306595 264 SwcfdftekhvqvavahvsetITQLnlsgyrknlqkSDLSTLVRRCPNLVHLDLSDSvmlKNDCFQEFFQLNYLQHLSLS 343
Cdd:COG4886 213 S--------------------GNQL-----------TDLPEPLANLTNLETLDLSNN---QLTDLPELGNLTNLEELDLS 258

                       170       180
                ....*....|....*....|....*.
gi 16306595 344 RCYdiiPETLLELGEIPTLKTLQVFG 369
Cdd:COG4886 259 NNQ---LTDLPPLANLTNLKTLDLSN 281