Pyruvate kinase M2 phosphorylates H2AX and promotes genomic instability in human tumor cells.
Pyruvate kinase M2 phosphorylates H2AX and promotes genomic instability in human tumor cells.
复制标题
丙酮酸激酶 M2 磷酸化 H2AX 并促进人类肿瘤细胞的基因组不稳定。
DOI:
10.18632/oncotarget.22621
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发表时间:
2017-12-12
期刊:
影响因子:
--
通讯作者:
Lu Y
中科院分区:
文献类型:
--
作者:
Xia L;Qin K;Wang XR;Wang XL;Zhou AW;Chen GQ;Lu Y
Pyruvate kinase (PK) catalyzes the conversion of phosphoenolpyruvate and ADP to pyruvate and ATP, a rate-limiting reaction in glycolysis. M2 isoform of PK (PKM2) is the predominant form of PK expressed in tumors. In addition to its well established cytosolic functions as a glycolytic enzyme, PKM2 displays nuclear localization and important nonmetabolic functions in tumorigenesis. Herein, we report that nuclear PKM2 interacts with histone H2AX under DNA damage conditions. Depletion of PKM2 decreased the level of serine 139-phosphorylated H2AX (γ-H2AX) in response to DNA damage. The in vitro kinase assay reveals that PKM2 directly phosphorylates H2AX at serine 139, which is abolished by the deletion of FBP-binding pocket of PKM2 (PKM2-Del515-520). Replacement of wild type PKM2 with the kinase dead mutant PKM2-Del515-520 leads to decreased cell proliferation and chromosomal aberrations under DNA damage conditions. Together, we propose that PKM2 promotes genomic instability in tumor cells which involves direct phosphorylation of H2AX. These findings reveal PKM2 as a novel modulator for genomic instability in tumor cells.
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影响因子:
64.8
作者:
Bartkova, J;Horejsi, Z;Bartek, J
通讯作者:
Bartek, J
影响因子:
4.6
作者:
Hirakawa T;Katagiri Y;Ando T;Matsunaga S
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DOI:
10.1126/science.1211485
发表时间:
2011-12-02
期刊:
Science (New York, N.Y.)
影响因子:
--
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通讯作者:
Cantley LC
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16.6
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Jiang, Yuhui;Wang, Yugang;Wang, Ting;Hawke, David H.;Zheng, Yanhua;Li, Xinjian;Zhou, Qin;Majumder, Sadhan;Bi, Erfei;Liu, David X.;Huang, Suyun;Lu, Zhimin
通讯作者:
Lu, Zhimin
影响因子:
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通讯作者:
Beard, Peter