FBXW7

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FBXW7

A gene on chromosome 4q31.3 that encodes a so-called F-box protein, which contains a 40 amino acid protein-interacting motif (the F box). F-box proteins form a complex with SKP1 and cullin, resulting in phosphorylation-dependent ubiquitination and ubiquitin-mediated degradation of targeted proteins. F-box proteins are divided into three classes based on the presence of:
(1) WD-40 repeats—as is the case with this F-box protein (Fbws class),
(2) leucine-rich repeats (Fbls class); or
(3) the presence or absence of other protein-protein interacting domains (Fbxs class).
The FBXW7 protein product binds directly to cyclin E, targeting it for ubiquitin-mediated degradation.

Molecular pathology
FBXW7 mutations are found in ovarian and breast cancer cell lines, implicating FBXW7’s potential role in carcinogenesis.
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Y-yes, I have seen them, but only once in my life, six years ago.
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