Global profiling of dynamic protein palmitoylation.
Global profiling of dynamic protein palmitoylation.
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DOI:
10.1038/nmeth.1769
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发表时间:
2011-11-06
期刊:
影响因子:
48
通讯作者:
Cravatt, Benjamin F.
中科院分区:
文献类型:
--
作者:
Martin, Brent R.;Wang, Chu;Adibekian, Alexander;Tully, Sarah E.;Cravatt, Benjamin F.
The reversible thioester linkage of palmitic acid on cysteines is known as protein S-palmitoylation, which facilitates the membrane association and proper subcellular localization of proteins. Here we report the metabolic incorporation of the palmitic acid analogue 17-octadecynoic acid (17-ODYA) in combination with stable-isotope labeling of cells (SILAC) and pulse-chase methods to generate a global quantitative map of dynamic protein palmitoylation events in cells. We distinguished stably palmitoylated proteins from those that show rapid turnover. Treatment with a serine lipase-selective inhibitor identified a special pool of dynamically palmitoylated proteins regulated by palmitoyl-protein thioesterases. This subset was enriched in oncogenes and other proteins linked to aberrant cell growth, migration, and cancer. Our method provides a straightforward way to characterize global palmitoylation dynamics in cells and confirms enzyme-mediated depalmitoylation as a critical regulatory mechanism for a specific subset of rapidly cycling palmitoylated proteins.
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