F-box and WD40 domain protein 7 (FBXW7) is a member of F-box protein family, which acts as a substrate recognition component of the ubiquitin ligase complex SCF (Skp-Cullin-F-box). The proteins have a bipartite structure. The shared F-box motif links F-box protein to Skp1 and the core complex, whereas divergent protein-protein interaction motifs selectively bind their cognate substrates. There are three FBXW7 isoforms α, β ,γ that share 10 out of 11 exons but they differ in their subcellular localization as well as in substrate recognition activity. The gene encoding FBXW7 is localized on human chromosome 4q31.3.
Immunogen
FBXW7 (NP_361014, 599 a.a. ~ 707 a.a) partial recombinant protein with GST tag. MW of the GST tag alone is 26 KDa.
Monoclonal Anti-FBXW7 antibody produced in mouse has been used in Western blotting and immunohistochemistry.
Biochem/physiol Actions
F-box proteins are associated with various signaling pathways, such as nutrient sensing in yeast, conserved developmental pathways in plants and animals. These proteins mediate recognition of phosphorylated targets including Cyclin E, Myc, c-Jun, and Notch, leading to their ubiquitination and degradation. Similar to the inactivation mode of other known tumor suppressors, the SV40 large T antigen binds F-box and WD40 domain protein 7 (FBXW7) without detectible effects on its stability, and thus acts as an inhibitor of FBXW7 activity.
Physical form
Solution in phosphate buffered saline, pH 7.4
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