Title |
Molecular basis of Pirh2-mediated p53 ubiquitylation
|
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Published in |
Nature Structural & Molecular Biology, November 2008
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DOI | 10.1038/nsmb.1521 |
Pubmed ID | |
Authors |
Yi Sheng, Rob C Laister, Alexander Lemak, Bin Wu, Elizabeth Tai, Shili Duan, Jonathan Lukin, Maria Sunnerhagen, Sampath Srisailam, Murthy Karra, Sam Benchimol, Cheryl H Arrowsmith |
Abstract |
Pirh2 (p53-induced RING-H2 domain protein; also known as Rchy1) is an E3 ubiquitin ligase involved in a negative-feedback loop with p53. Using NMR spectroscopy, we show that Pirh2 is a unique cysteine-rich protein comprising three modular domains. The protein binds nine zinc ions using a variety of zinc coordination schemes, including a RING domain and a left-handed beta-spiral in which three zinc ions align three consecutive small beta-sheets in an interleaved fashion. We show that Pirh2-p53 interaction is dependent on the C-terminal zinc binding module of Pirh2, which binds to the tetramerization domain of p53. As a result, Pirh2 preferentially ubiquitylates the tetrameric form of p53 in vitro and in vivo, suggesting that Pirh2 regulates protein turnover of the transcriptionally active form of p53. |
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Geographical breakdown
Country | Count | As % |
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Switzerland | 1 | 2% |
France | 1 | 2% |
India | 1 | 2% |
Canada | 1 | 2% |
Singapore | 1 | 2% |
Unknown | 53 | 91% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Researcher | 12 | 21% |
Student > Ph. D. Student | 9 | 16% |
Student > Bachelor | 6 | 10% |
Student > Master | 5 | 9% |
Professor > Associate Professor | 4 | 7% |
Other | 7 | 12% |
Unknown | 15 | 26% |
Readers by discipline | Count | As % |
---|---|---|
Agricultural and Biological Sciences | 26 | 45% |
Biochemistry, Genetics and Molecular Biology | 11 | 19% |
Medicine and Dentistry | 3 | 5% |
Pharmacology, Toxicology and Pharmaceutical Science | 2 | 3% |
Chemistry | 1 | 2% |
Other | 0 | 0% |
Unknown | 15 | 26% |