USP7 counteracts SCF TrCP - but not APC Cdh1 -mediated proteolysis of Claspin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15110%2F09%3A00010975" target="_blank" >RIV/61989592:15110/09:00010975 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

USP7 counteracts SCF TrCP - but not APC Cdh1 -mediated proteolysis of Claspin

Popis výsledku v původním jazyce

Claspin is an adaptor protein that facilitates the ataxia telangiectasia and Rad3-related (ATR)- mediated phosphorylation and activation of Chk1, a key effector kinase in the DNA damage response. Effi cient termination of Chk1 signaling in mitosis and during checkpoint recovery requires SCF TrCP - dependent destruction of Claspin. Here, we identify the deubiquitylating enzyme ubiquitin-specifi c protease 7 (USP7) as a novel reg ulator of Claspin stability. Claspin and USP7 interact in vivo, and USP7 isrequired to maintain steady-state levels of Claspin. Furthermore, USP7-mediated deubiquitylation markedly prolongs the half-life of Claspin, which in turn increases the magnitude and duration of Chk1 phosphorylation in response to genotoxic stress. Finally, we fi nd that in addition to the M phase ? specifi c, SCF TrCP -mediated degradation, Claspin is destabilized by the anaphase-promoting complex (APC) and thus remains unstable in G1. Importantly, we demonstrate that USP7 specifi cally

Název v anglickém jazyce

USP7 counteracts SCF TrCP - but not APC Cdh1 -mediated proteolysis of Claspin

Popis výsledku anglicky

Claspin is an adaptor protein that facilitates the ataxia telangiectasia and Rad3-related (ATR)- mediated phosphorylation and activation of Chk1, a key effector kinase in the DNA damage response. Effi cient termination of Chk1 signaling in mitosis and during checkpoint recovery requires SCF TrCP - dependent destruction of Claspin. Here, we identify the deubiquitylating enzyme ubiquitin-specifi c protease 7 (USP7) as a novel reg ulator of Claspin stability. Claspin and USP7 interact in vivo, and USP7 isrequired to maintain steady-state levels of Claspin. Furthermore, USP7-mediated deubiquitylation markedly prolongs the half-life of Claspin, which in turn increases the magnitude and duration of Chk1 phosphorylation in response to genotoxic stress. Finally, we fi nd that in addition to the M phase ? specifi c, SCF TrCP -mediated degradation, Claspin is destabilized by the anaphase-promoting complex (APC) and thus remains unstable in G1. Importantly, we demonstrate that USP7 specifi cally

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EB - Genetika a molekulární biologie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Cell Biology

ISSN

0021-9525

e-ISSN

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Svazek periodika

184

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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