FBXW7 Antibody – Rabbit Polyclonal

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. Mutations in this gene are detected in ovarian and breast cancer cell lines, implicating the gene's potential role in the pathogenesis of human cancers. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2012]

Function: Substrate recognition component of a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Probably recognizes and binds to phosphorylated target proteins. Involved in the degradation of cyclin-E, MYC, NOTCH1 released notch intracellular domain (NICD), and probably PSEN1. Ref.3 Ref.8 Ref.9 Ref.11 Ref.12

Subunit structure: Component of the SCF(FBXW7) complex consisting of CUL1, RBX1, SKP1 and FBXW7. Interacts with PSEN1, cyclin E, NOTCH1 NICD, NOTCH4 NICD and SKP1. Interacts with MYC (when phosphorylated). Isoform 1 interacts with USP28, leading to counteract ubiquitination of MYC. Isoform 4 interacts (via WD repeats) with SV40 large T antigen (via CPD region). Forms a trimeric complex with NOTCH1 and SGK1. Ref.3 Ref.4 Ref.8 Ref.9 Ref.10 Ref.11 Ref.12 Ref.14

Subcellular location: Isoform 1: Nucleus › nucleoplasm Ref.12. Isoform 2: Cytoplasm Ref.12. Isoform 4: Nucleus › nucleolus Ref.12. Nucleus

By similarity Ref.12.

Tissue specificity: Isoform 1 is widely expressed. Isoform 4 is expressed in brain. Ref.4

Sequence similarities: Contains 1 F-box domain.Contains 7 WD repeats.

Sequence caution: The sequence BAA91986.1 differs from that shown. Reason: Erroneous initiation.