Metabolic regulation of protein N-alpha-acetylation by Bcl-xL promotes cell survival.
Metabolic regulation of protein N-alpha-acetylation by Bcl-xL promotes cell survival.
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DOI:
10.1016/j.cell.2011.06.050
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发表时间:
2011-08-19
期刊:
影响因子:
64.5
通讯作者:
Yuan J
中科院分区:
文献类型:
--
作者:
Yi CH;Pan H;Seebacher J;Jang IH;Hyberts SG;Heffron GJ;Vander Heiden MG;Yang R;Li F;Locasale JW;Sharfi H;Zhai B;Rodriguez-Mias R;Luithardt H;Cantley LC;Daley GQ;Asara JM;Gygi SP;Wagner G;Liu CF;Yuan J
Previous experiments suggest a connection between the N-alpha-acetylation of proteins and the sensitivity of cells to apoptotic signals. Here, we describe a novel biochemical assay to detect the acetylation status of proteins and demonstrate that protein N-alpha-acetylation is regulated by the availability of acetyl-CoA. Because the anti-apoptotic protein Bcl-xL is known to influence mitochondrial metabolism, we reasoned that Bcl-xL may provide a link between protein N-alpha-acetylation and apoptosis. Indeed, Bcl-xL overexpression leads to a reduction in levels of acetyl-CoA and N-alpha-acetylated proteins in the cell. This effect is independent of Bax and Bak, the known binding partners of Bcl-xL. Increasing cellular levels of acetyl-CoA by addition of acetate or citrate restores protein N-alpha-acetylation in Bcl-xL-expressing cells and confers sensitivity to apoptotic stimuli. We conclude that acetyl-CoA serves as a signaling molecule that couples apoptotic sensitivity to metabolism by regulating protein N-alpha-acetylation.
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