FBXW7

F-box/WD repeat-containing protein 7 is a protein that in humans is encoded by the FBXW7 gene.

FBXW7
Available structures PDB Ortholog search: PDBe RCSB List of PDB id codes 2OVP, 2OVQ, 2OVR, 5IBK
Identifiers
Aliases	FBXW7, AGO, CDC4, FBW6, FBW7, FBX30, FBXO30, FBXW6, SEL-10, SEL10, hAgo, hCdc4, F-box and WD repeat domain containing 7
External IDs	OMIM: 606278; MGI: 1354695; HomoloGene: 117451; GeneCards: FBXW7; OMA:FBXW7 - orthologs
Gene location (Human) Chr. Chromosome 4 (human) Band 4q31.3 Start 152,320,544 bp End 152,536,092 bp
Gene location (Mouse) Chr. Chromosome 3 (mouse) Band 3 F1|3 37.7 cM Start 84,722,575 bp End 84,886,505 bp
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in Brodmann area 23 Achilles tendon epithelium of colon middle temporal gyrus superior frontal gyrus occipital lobe pons parietal lobe primary visual cortex postcentral gyrus Top expressed in prefrontal cortex primary motor cortex barrel cortex visual cortex temporal lobe primary visual cortex amygdala saccule superior frontal gyrus Region I of hippocampus proper More reference expression data BioGPS More reference expression data
Gene ontology Molecular function protein-macromolecule adaptor activity protein binding ubiquitin-protein transferase activator activity identical protein binding ubiquitin protein ligase binding cyclin binding phosphothreonine residue binding ubiquitin-protein transferase activity ubiquitin binding Cellular component cytoplasm Parkin-FBXW7-Cul1 ubiquitin ligase complex SCF ubiquitin ligase complex nucleoplasm nucleolus nucleus cytosol mitochondrion endoplasmic reticulum Golgi apparatus perinuclear region of cytoplasm Biological process positive regulation of epidermal growth factor-activated receptor activity positive regulation of protein targeting to mitochondrion negative regulation of SREBP signaling pathway cellular response to UV negative regulation of triglyceride biosynthetic process protein stabilization negative regulation of hepatocyte proliferation sister chromatid cohesion cellular response to DNA damage stimulus regulation of protein localization positive regulation of oxidative stress-induced neuron intrinsic apoptotic signaling pathway SCF-dependent proteasomal ubiquitin-dependent protein catabolic process vasculature development regulation of autophagy of mitochondrion negative regulation of DNA endoreduplication positive regulation of ubiquitin-protein transferase activity positive regulation of ubiquitin-dependent protein catabolic process protein ubiquitination lipid homeostasis positive regulation of ERK1 and ERK2 cascade regulation of cell cycle G1/S phase transition regulation of lipid storage viral process positive regulation of proteasomal protein catabolic process positive regulation of protein ubiquitination negative regulation of Notch signaling pathway protein polyubiquitination post-translational protein modification negative regulation of osteoclast development vasculogenesis Notch signaling pathway negative regulation of gene expression ubiquitin recycling lung development protein destabilization proteasome-mediated ubiquitin-dependent protein catabolic process regulation of cell migration involved in sprouting angiogenesis negative regulation of RNA polymerase II regulatory region sequence-specific DNA binding regulation of circadian rhythm rhythmic process Sources:Amigo / QuickGO
Orthologs Species Human Mouse Entrez 55294 50754 Ensembl ENSG00000109670 ENSMUSG00000028086 UniProt Q969H0 Q8VBV4 RefSeq (mRNA) NM_001013415 NM_001257069 NM_018315 NM_033632 NM_001349798 NM_001177773 NM_001177774 NM_080428 RefSeq (protein) NP_001013433 NP_001243998 NP_060785 NP_361014 NP_001336727 NP_001171244 NP_001171245 NP_536353 Location (UCSC) Chr 4: 152.32 – 152.54 Mb Chr 3: 84.72 – 84.89 Mb PubMed search
Wikidata
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Function

This gene encodes a member of the F-box protein family which is characterized by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. The protein encoded by this gene was previously referred to as FBX30, and belongs to the Fbws class; in addition to an F-box, this protein contains 7 tandem WD40 repeats. This protein binds directly to cyclin E and probably targets cyclin E for ubiquitin-mediated degradation. Other well established pro-proliferative targets of FBXW7 are c-Myc and Notch1. Mono-allelic mutations in this gene are detected in sporadic cancers [e.g., cholangiocarcinoma (35%), T-ALL (31%), endometrial carcinoma (16%), colorectal carcinoma (16%), bladder cancer (10%), gastric carcinoma (6%), lung squamous cell carcinoma (5%), etc.]. These findings implicate the gene's potential role in the pathogenesis of human cancers. Despite being commonly acknowledged as a haploinsufficient tumor suppressor, mutations are not found in some cancers, such as acute myeloid leukemia and multiple myeloma. One possibility is that FBXW7 substrate stabilization is detrimental in these neoplasms. For example, the FBXW7 substrate C/EBPα suppresses AML and multiple myelomas require constitutive NF-κB signaling; therefore, disruption of FBXW7-mediated ubiquitylation of IκBd in these tumors results in cell death.

Three transcript variants encoding three different isoforms have been found for this gene.

Interactions

FBXW7 has been shown to interact with:

• MYB,
• PPARGC1A,
• Parkin (ligase), and
• SKP1A.

Further reading

• Robertson NG, Khetarpal U, Gutiérrez-Espeleta GA, Bieber FR, Morton CC (1995). "Isolation of novel and known genes from a human fetal cochlear cDNA library using subtractive hybridization and differential screening". Genomics. 23 (1): 42–50. doi:10.1006/geno.1994.1457. PMID 7829101.
• Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
• Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
• Oberg C, Li J, Pauley A, Wolf E, Gurney M, Lendahl U (2001). "The Notch intracellular domain is ubiquitinated and negatively regulated by the mammalian Sel-10 homolog". J. Biol. Chem. 276 (38): 35847–53. doi:10.1074/jbc.M103992200. PMID 11461910.
• Koepp DM, Schaefer LK, Ye X, Keyomarsi K, Chu C, Harper JW, Elledge SJ (2001). "Phosphorylation-dependent ubiquitination of cyclin E by the SCFFbw7 ubiquitin ligase". Science. 294 (5540): 173–7. Bibcode:2001Sci...294..173K. doi:10.1126/science.1065203. PMID 11533444. S2CID 23404627.
• Moberg KH, Bell DW, Wahrer DC, Haber DA, Hariharan IK (2001). "Archipelago regulates Cyclin E levels in Drosophila and is mutated in human cancer cell lines". Nature. 413 (6853): 311–6. Bibcode:2001Natur.413..311M. doi:10.1038/35095068. PMID 11565033. S2CID 4372821.
• Strohmaier H, Spruck CH, Kaiser P, Won KA, Sangfelt O, Reed SI (2001). "Human F-box protein hCdc4 targets cyclin E for proteolysis and is mutated in a breast cancer cell line". Nature. 413 (6853): 316–22. Bibcode:2001Natur.413..316S. doi:10.1038/35095076. PMID 11565034. S2CID 478973.
• Wu G, Lyapina S, Das I, Li J, Gurney M, Pauley A, Chui I, Deshaies RJ, Kitajewski J (2001). "SEL-10 Is an Inhibitor of Notch Signaling That Targets Notch for Ubiquitin-Mediated Protein Degradation". Mol. Cell. Biol. 21 (21): 7403–15. doi:10.1128/MCB.21.21.7403-7415.2001. PMC 99913. PMID 11585921.
• Spruck CH, Strohmaier H, Sangfelt O, Müller HM, Hubalek M, Müller-Holzner E, Marth C, Widschwendter M, Reed SI (2002). "hCDC4 gene mutations in endometrial cancer". Cancer Res. 62 (16): 4535–9. PMID 12183400.
• Li J, Pauley AM, Myers RL, Shuang R, Brashler JR, Yan R, Buhl AE, Ruble C, Gurney ME (2002). "SEL-10 interacts with presenilin 1, facilitates its ubiquitination, and alters A-beta peptide production". J. Neurochem. 82 (6): 1540–8. doi:10.1046/j.1471-4159.2002.01105.x. PMID 12354302. S2CID 29687815.
• Staropoli JF, McDermott C, Martinat C, Schulman B, Demireva E, Abeliovich A (2003). "Parkin is a component of an SCF-like ubiquitin ligase complex and protects postmitotic neurons from kainate excitotoxicity". Neuron. 37 (5): 735–49. doi:10.1016/S0896-6273(03)00084-9. PMID 12628165. S2CID 17024826.
• Calhoun ES, Jones JB, Ashfaq R, Adsay V, Baker SJ, Valentine V, Hempen PM, Hilgers W, Yeo CJ, Hruban RH, Kern SE (2003). "BRAF and FBXW7 (CDC4, FBW7, AGO, SEL10) Mutations in Distinct Subsets of Pancreatic Cancer: Potential Therapeutic Targets". Am. J. Pathol. 163 (4): 1255–60. doi:10.1016/S0002-9440(10)63485-2. PMC 1868306. PMID 14507635.
• Welcker M, Singer J, Loeb KR, Grim J, Bloecher A, Gurien-West M, Clurman BE, Roberts JM (2003). "Multisite phosphorylation by Cdk2 and GSK3 controls cyclin E degradation". Mol. Cell. 12 (2): 381–92. doi:10.1016/S1097-2765(03)00287-9. PMID 14536078.
• Busino L, Donzelli M, Chiesa M, Guardavaccaro D, Ganoth D, Dorrello NV, Hershko A, Pagano M, Draetta GF (2003). "Degradation of Cdc25A by beta-TrCP during S phase and in response to DNA damage". Nature. 426 (6962): 87–91. Bibcode:2003Natur.426...87B. doi:10.1038/nature02082. PMID 14603323. S2CID 768783.
• Cassia R, Moreno-Bueno G, Rodríguez-Perales S, Hardisson D, Cigudosa JC, Palacios J (2004). "Cyclin E gene (CCNE) amplification and hCDC4 mutations in endometrial carcinoma". J. Pathol. 201 (4): 589–95. doi:10.1002/path.1474. PMID 14648662. S2CID 26390858.
• Nateri AS, Riera-Sans L, Da Costa C, Behrens A (2004). "The ubiquitin ligase SCFFbw7 antagonizes apoptotic JNK signaling". Science. 303 (5662): 1374–8. Bibcode:2004Sci...303.1374N. doi:10.1126/science.1092880. PMID 14739463. S2CID 36368075.