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Ubiquitin Ligase Activities of WWP1 Germline Variants K740N and N745S

Biochemistry. 2021-01; 
Hanjie Jiang, Daniel R Dempsey, Philip A Cole
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Mammalian Expression Human WWP1 cDNA (aa2-922) was purchased from Genscript. Get A Quote

摘要

WWP1 is an E3 ubiquitin ligase that has been reported to target the tumor suppressor lipid phosphatase PTEN. K740N and N745S are recently identified germline variants of WWP1 that have been linked to PTEN-associated cancers [Lee, Y. R., et al. (2020) ]. These WWP1 variants have been suggested to release WWP1 from its native autoinhibited state, thereby promoting enhanced PTEN ubiquitination as a mechanism for driving cancer. Using purified proteins and enzymatic assays, we investigate the possibility that K740N and N745S WWP1 possess enhanced ubiquitin ligase activity and demonstrate that these variants are similar to the wild type (WT) in both autoubiquitination and PTEN ubiquitination. Furthermore, K740N and... More

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