F-box domain found in F-box/LRR-repeat protein 3 (FBXL3) and similar proteins; FBXL3, also called F-box and leucine-rich repeat protein 3A, or F-box/LRR-repeat protein 3A, is the substrate-recognition component of the SCF(FBXL3) E3 ubiquitin ligase complex that mainly acts in the nucleus and mediates ubiquitination and subsequent degradation of CRY1 and CRY2, and thus, is involved in circadian rhythm function. It plays a key role in the maintenance of both the speed and the robustness of the circadian clock oscillation. 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 1337931653  34 CDWGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22178     1 VDWGNLLQDIILQIFQYLPLLDRAHASQVCRNWNQVFHMPDLW 43

F-box domain found in F-box/LRR-repeat protein 3 (FBXL3) and similar proteins; FBXL3, also called F-box and leucine-rich repeat protein 3A, or F-box/LRR-repeat protein 3A, is the substrate-recognition component of the SCF(FBXL3) E3 ubiquitin ligase complex that mainly acts in the nucleus and mediates ubiquitination and subsequent degradation of CRY1 and CRY2, and thus, is involved in circadian rhythm function. It plays a key role in the maintenance of both the speed and the robustness of the circadian clock oscillation. 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 1337931653  34 CDWGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22178     1 VDWGNLLQDIILQIFQYLPLLDRAHASQVCRNWNQVFHMPDLW 43

A Receptor for Ubiquitination Targets;

                           10        20        30
                   ....*....|....*....|....*....|....*.
gi 1337931653   42 DIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLWR 77
Cdd:smart00256   4 EILEEILSKLDPKDLLRLRKVSRKWRSLIDSHDFWF 39

Leucine-rich repeat domain of FBXL3 and related proteins; F-box/LRR-repeat proteins are part of Skp1-Cul1-F-box-protein (SCF) ubiquitin ligase complexes. They contain an F-Box, which binds to the core complex component SKP and a leucine-rich repeat (LRR) domain which gives substrate binding specificity. FBXL3 (F-box and leucine rich repeat protein 3) and FBXL21 have been shown to bind CRY1 repressors and are involved in regulation of circadian clock.

                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1337931653  79 FEFELNQPATSYLKATHPELIKQIIKRHSNHLQYVSFKVDSSKESAEAACDILSQLVNCSLKTLGLISTARPSFMDLPKS 158
Cdd:cd23951     1 FEFEFNQPSTSYLKSTPPALIKQILKRHAAHLRFVSFKVDSSQESAEAACDILSQLVNCSLKTLGLMSTAKPSFLDVDQS 80

                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1337931653 159 HFISALTVVFVNSKSLSSLKIDDTPVDDPSLKVLVANNSDTLKLLKMSSCPHVSPAGILCVADQCHGLRELALNYHLLSD 238
Cdd:cd23951    81 KFVSALTVVFDHSSSLSSLAIDDTPVDDPSLQTLASSSSDTLELLKMKSCPRVSPRGILAVADHCQHLRELSLNYHLLSD 160

                         170       180       190       200       210       220       230       240
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1337931653 239 ELLLALSSEKHVRLEHLRIDVVSENPGQTHFHTIQKSSWDAFIKHSPKVNLVMYFFLYEEE-FDPFFRYEIPATHLYFGR 317
Cdd:cd23951   161 DLLLALSSEEHVRLEHLRIDVVSENDGPMPLHQISKESWDALIKHSPDVNLVMYFFVLEDEdFDPFFRSYTPVTHLYFGR 240

                         250       260       270       280       290       300       310       320
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1337931653 318 SVSKDVLGRVGMTCPRLVELVVCANGLRPLDEELIRIAERCKNLSAIGLGECEVSCSAFVEFVKMCGGRLSQLSIMEEVL 397
Cdd:cd23951   241 SVPKAVLGRVGQHCPRLVELVVCANGNSPIDEELIRIAKNCKQLSSLGLGECEVSCSALVEFAKLCGPRLTELYVMEEVL 320

                         330       340
                  ....*....|....*....|....*....
gi 1337931653 398 IPDQKYSLEQIHWEVSKHLGRVWFPDMMP 426
Cdd:cd23951   321 VEDEEYDLESATAEVSKYLGRDWSPEYMP 349

F-box domain found in F-box/LRR-repeat protein 3 (FBXL3) and similar proteins; FBXL3, also called F-box and leucine-rich repeat protein 3A, or F-box/LRR-repeat protein 3A, is the substrate-recognition component of the SCF(FBXL3) E3 ubiquitin ligase complex that mainly acts in the nucleus and mediates ubiquitination and subsequent degradation of CRY1 and CRY2, and thus, is involved in circadian rhythm function. It plays a key role in the maintenance of both the speed and the robustness of the circadian clock oscillation. 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 1337931653  34 CDWGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22178     1 VDWGNLLQDIILQIFQYLPLLDRAHASQVCRNWNQVFHMPDLW 43

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 1337931653  35 DWGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22179     2 DWGNLPHHVVLHIFQYLPLVDRARASSVCRRWNEVFHIPDLW 43

F-box domain found in F-box only protein 39 (FBXO39) and similar proteins; FBXO39, also called FBX39, likely functions as the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein)-type E3 ubiquitin ligase complex. It acts as a cancer/testis antigen from colon cancer patients by serological analysis of recombinant cDNA expression libraries (SEREX). 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 1337931653  36 WGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLWRC 78
Cdd:cd22108     1 WANLPDVCLRHVFRWLGDRDRSRAALVCKRWNQAMYSPALWRS 43

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
                  ....*....|....*....|....*....|....*....
gi 1337931653  38 NLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22118     3 SLPPEIMLKIFSYLNPQDLCRCAQVCTKWSQLARDGSLW 41

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 1337931653  38 NLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFH 71
Cdd:cd09917     2 DLPDEILLKILSYLDPRDLLRLSLVCKRWRELAS 35

A Receptor for Ubiquitination Targets;

                           10        20        30
                   ....*....|....*....|....*....|....*.
gi 1337931653   42 DIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLWR 77
Cdd:smart00256   4 EILEEILSKLDPKDLLRLRKVSRKWRSLIDSHDFWF 39

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 1337931653  35 DWGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22155     1 DWTLLPDDTVLGLFGLLNYRDRASLASVCRAWRALGSSHSLW 42

F-box domain found in F-box/LRR-repeat protein 13 (FBXL13) and similar proteins; FBXL13, also called F-box and leucine-rich repeat protein 13, or dynein regulatory complex subunit 6, is a component of the nexin-dynein regulatory complex (N-DRC), a key regulator of ciliary/flagellar motility which maintains the alignment and integrity of the distal axoneme and regulates microtubule sliding in motile axonemes. It is also 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 1337931653  43 IVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLW 76
Cdd:cd22124     8 AALKIFSYLDLRDLARCAQVCRSWKVITQSSSLW 41

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
                  ....*....|....*....|....*....|....*....
gi 1337931653  39 LLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLWR 77
Cdd:cd22123     4 LPENVLLEILSYLPVRDLLRISRVCKRWRRLVYDKTLWR 42

F-box domain found in F-box/LRR-repeat protein 8 (FBXL8) and similar proteins; FBXL8, also called F-box and leucine-rich repeat protein 8, or F-box protein FBL8, 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
                  ....*....|....*....|....*
gi 1337931653  42 DIVLHVFKYLPLLDRAHASQVCRNW 66
Cdd:cd22121     6 EILVHIFRHLSLRDRYAAAQVCKHW 30

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 1337931653  41 QDIVLHVFKYLPLLDRAHASQVCRNWNQVFHMPDLWR 77
Cdd:cd22122     6 REVWLPVFQYLSPKDLCVCMRVCKTWNRWCCDPSLWK 42

F-box domain found in F-box only protein 45 (FBXO45) and similar proteins; FBXO45, also called FBX45, or F-box/SPRY domain-containing protein 1, functions as the substrate-recognition component of E3 ubiquitin ligase complexes. It is critical for synaptogenesis, neuronal migration, and synaptic transmission. 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 1337931653  36 WGNLLQDIVLHVFKYLPLLDRAHASQVCRNWNQVFH 71
Cdd:cd22111     1 AARLPSRVLEVIFSYLDLPDLRNCSLVCKSWYRLLN 36

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 1337931653  39 LLQDIVLHVFKYLPLLDRA-HASQVCRNWNQVFHMPDLWRCFEF 81
Cdd:cd22092     5 LPDSILLKIFSYLSLQERClSASLVCKYWRDLCLDSQFWKQIDL 48