Switching Cdk2 on or off with small molecules to reveal requirements in human cell proliferation.
Switching Cdk2 on or off with small molecules to reveal requirements in human cell proliferation.
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DOI:
10.1016/j.molcel.2011.03.031
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发表时间:
2011-06-10
期刊:
影响因子:
16
通讯作者:
Fisher RP
中科院分区:
文献类型:
--
作者:
Merrick KA;Wohlbold L;Zhang C;Allen JJ;Horiuchi D;Huskey NE;Goga A;Shokat KM;Fisher RP
Multiple cyclin-dependent kinases (CDKs) control eukaryotic cell division, but assigning specific functions to individual CDKs remains a challenge. During the mammalian cell cycle, Cdk2 forms active complexes before Cdk1, but lack of Cdk2 protein does not block cell-cycle progression. To detect requirements and define functions for Cdk2 activity in human cells when normal expression levels are preserved, and non-physiologic compensation by other CDKs is prevented, we replaced the wild-type kinase with a version sensitized to specific inhibition by bulky adenine analogs. The sensitizing mutation also impaired a non-catalytic function of Cdk2 in restricting assembly of cyclin A with Cdk1, but this defect could be corrected by both inhibitory and non-inhibitory analogs. This allowed either chemical rescue or selective antagonism of Cdk2 activity in vivo, to uncover a requirement in cell proliferation, and non-redundant, rate-limiting roles in restriction point passage and S-phase entry.
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影响因子:
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10.1073/pnas.0809350106
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