A quantitative map of the liver mitochondrial phosphoproteome reveals posttranslational control of ketogenesis.

A quantitative map of the liver mitochondrial phosphoproteome reveals posttranslational control of ketogenesis.
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DOI:
10.1016/j.cmet.2012.10.004
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发表时间:
2012-11-07
期刊:
影响因子:
29
通讯作者:
Pagliarini DJ
Pagliarini DJ
中科院分区:
生物学1区
文献类型:
--
作者:
Grimsrud PA;Carson JJ;Hebert AS;Hubler SL;Niemi NM;Bailey DJ;Jochem A;Stapleton DS;Keller MP;Westphall MS;Yandell BS;Attie AD;Coon JJ;Pagliarini DJ

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Mitochondria are dynamic organelles that play a central role in a diverse array of metabolic processes. Elucidating mitochondrial adaptations to changing metabolic demands and the pathogenic alterations that underlie metabolic disorders represent principal challenges in cell biology. Here, we performed multiplexed quantitative mass spectrometry-based proteomics to chart the remodeling of the mouse liver mitochondrial proteome and phosphoproteome during both acute and chronic physiological transformations in more than 50 mice. Our analyses reveal that reversible phosphorylation is widespread in mitochondria, and is a key mechanism for regulating ketogenesis during the onset of obesity and type 2 diabetes. Specifically, we have demonstrated that phosphorylation of a conserved serine on Hmgcs2 (S456) significantly enhances its catalytic activity in response to increased ketogenic demand. Collectively, our work describes the plasticity of this organelle at high resolution and provides a framework for investigating the roles of proteome restructuring and reversible phosphorylation in mitochondrial adaptation.
在具有高能碰撞解离的 LTQ-Orbitrap 上使用 iTRAQ 进行定量线粒体磷酸蛋白质组学。
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