Quantitative phosphoproteomics identifies substrates and functional modules of Aurora and Polo-like kinase activities in mitotic cells.

Quantitative phosphoproteomics identifies substrates and functional modules of Aurora and Polo-like kinase activities in mitotic cells.
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DOI:
10.1126/scisignal.2001497
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发表时间:
2011-06-28
期刊:
影响因子:
7.3
通讯作者:
Gerber SA
Gerber SA
中科院分区:
生物学1区
文献类型:
--
作者:
Kettenbach AN;Schweppe DK;Faherty BK;Pechenick D;Pletnev AA;Gerber SA

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有丝分裂是一个涉及一系列复杂事件的过程,需要仔细协调。少数激酶,特别是Aurora A、Aurora B、细胞周期蛋白依赖性激酶-细胞周期蛋白复合物Cdk 1/细胞周期蛋白B和Polo样激酶1(Plk 1)引起的蛋白磷酸化,协调了从进入有丝分裂到胞质分裂的几乎每一步细胞分裂。为了发现更多关于极光A,极光B,和Plk家族激酶的功能,我们映射有丝分裂磷酸化位点,这些激酶通过结合使用定量磷酸化蛋白质组学和选择性靶向激酶活性的小分子抑制剂。使用这种整合的方法,我们将562个蛋白质上的778个磷酸化位点与有丝分裂停滞的细胞中的这些酶连接起来。通过将激酶连接到蛋白质复合物,我们将这些激酶与功能模块相关联。除了预测以前未知的功能外,这项工作还为这些激酶建立了额外的底物识别基序,并提供了分析模板,可进一步用于剖析细胞信号传导和系统生物学其他领域的激酶信号传导事件。
Mitosis is a process involving a complex series of events that require careful coordination. Protein phosphorylation by a small number of kinases, in particular Aurora A, Aurora B, the cyclin-dependent kinase–cyclin complex Cdk1/cyclinB, and Polo-like kinase 1 (Plk1), orchestrates almost every step of cell division, from entry into mitosis to cytokinesis. To discover more about the functions of Aurora A, Aurora B, and kinases of the Plk family, we mapped mitotic phosphorylation sites to these kinases through the combined use of quantitative phosphoproteomics and selective targeting of kinase activities by small-molecule inhibitors. Using this integrated approach, we connected 778 phosphorylation sites on 562 proteins with these enzymes in cells arrested in mitosis. By connecting the kinases to protein complexes, we associated these kinases with functional modules. In addition to predicting previously unknown functions, this work establishes additional substrate-recognition motifs for these kinases and provides an analytical template for further use in dissecting kinase signaling events in other areas of cellular signaling and systems biology.
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