SIRT1 and SIRT3 deacetylate homologous substrates: AceCS1,2 and HMGCS1,2.
SIRT1 and SIRT3 deacetylate homologous substrates: AceCS1,2 and HMGCS1,2.
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DOI：
10.18632/aging.100339
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发表时间：
2011-06
期刊：
影响因子：
--
通讯作者：
Verdin E
中科院分区：
文献类型：
--
作者：
Hirschey MD;Shimazu T;Capra JA;Pollard KS;Verdin E
SIRT1 and SIRT3 are NAD+-dependent protein deacetylases that are evolutionarily conserved across mammals. These proteins are located in the cytoplasm/nucleus and mitochondria, respectively. Previous reports demonstrated that human SIRT1 deacetylates Acetyl-CoA Synthase 1 (AceCS1) in the cytoplasm, whereas SIRT3 deacetylates the homologous Acetyl-CoA Synthase 2 (AceCS2) in the mitochondria. We recently showed that 3-hydroxy-3-methylglutaryl CoA synthase 2 (HMGCS2) is deacetylated by SIRT3 in mitochondria, and we demonstrate here that SIRT1 deacetylates the homologous 3-hydroxy-3-methylglutaryl CoA synthase 1 (HMGCS1) in the cytoplasm. This novel pattern of substrate homology between cytoplasmic SIRT1 and mitochondrial SIRT3 suggests that considering evolutionary relationships between the sirtuins and their substrates may help to identify and understand the functions and interactions of this gene family. In this perspective, we take a first step by characterizing the evolutionary history of the sirtuins and these substrate families.
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