2017年3月
Tandem UIMs confer Lys48 ubiquitin chain substrate preference to deubiquitinase USP25
SCIENTIFIC REPORTS
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- 巻
- 7
- 号
- 開始ページ
- 45037
- 終了ページ
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1038/srep45037
- 出版者・発行元
- NATURE PUBLISHING GROUP
Ubiquitin-specific protease (USP) 25, belonging to the USP family of deubiquitinases, harbors two tandem ubiquitin-interacting motifs (UIMs), a -20-amino-acid alpha-helical stretch that binds to ubiquitin. However, the role of the UIMs in USP25 remains unclear. Here we show that the tandem UIM region binds to Lys48-, but not Lys63-, linked ubiquitin chains, where the two UIMs played a critical and cooperative role. Purified USP25 exhibited higher ubiquitin isopeptidase activity to Lys48-, than to Lys63-, linked ubiquitin chains. Mutations that disrupted the ubiquitin-binding ability of the tandem UIMs resulted in a reduced ubiquitin isopeptidase activity of USP25, suggesting a role for the UIMs in exerting the full catalytic activity of USP25. Moreover, when mutations that convert the binding preference from Lys48- to Lys63- linked ubiquitin chains were introduced into the tandem UIM region, the USP25 mutants acquired elevated and reduced isopeptidase activity toward Lys63- and Lys48- linked ubiquitin chains, respectively. These results suggested that the binding preference of the tandem UIMs toward Lys48- linked ubiquitin chains contributes not only to the full catalytic activity but also to the ubiquitin chain substrate preference of USP25, possibly by selectively holding the Lys48- linked ubiquitin chain substrates in the proximity of the catalytic core.
- リンク情報
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- DOI
- https://doi.org/10.1038/srep45037
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/28327663
- PubMed Central
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5361193
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000396993400001&DestApp=WOS_CPL
- URL
- http://europepmc.org/abstract/med/28327663
- URL
- http://orcid.org/0000-0003-2665-7708
- ID情報
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- DOI : 10.1038/srep45037
- ISSN : 2045-2322
- ORCIDのPut Code : 37432403
- PubMed ID : 28327663
- PubMed Central 記事ID : PMC5361193
- Web of Science ID : WOS:000396993400001