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Title: NMT1 and NMT2 are lysine myristoyltransferases regulating the ARF6 GTPase cycle

Journal Article · · Nature Communications

Abstract Lysine fatty acylation in mammalian cells was discovered nearly three decades ago, yet the enzymes catalyzing it remain unknown. Unexpectedly, we find that human N-terminal glycine myristoyltransferases (NMT) 1 and 2 can efficiently myristoylate specific lysine residues. They modify ADP-ribosylation factor 6 (ARF6) on lysine 3 allowing it to remain on membranes during the GTPase cycle. We demonstrate that the NAD + -dependent deacylase SIRT2 removes the myristoyl group, and our evidence suggests that NMT prefers the GTP-bound while SIRT2 prefers the GDP-bound ARF6. This allows the lysine myrisotylation-demyristoylation cycle to couple to and promote the GTPase cycle of ARF6. Our study provides an explanation for the puzzling dissimilarity of ARF6 to other ARFs and suggests the existence of other substrates regulated by this previously unknown function of NMT. Furthermore, we identified a NMT/SIRT2-ARF6 regulatory axis, which may offer new ways to treat human diseases.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Sponsoring Organization:
National Institutes of Health (NIH); National Institute of Diabetes, Digestive and Kidney Diseases (NIDDK); National Institute of General Medical Sciences (NIGMS); Howard Hughes Medical Institute (HHMI); National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
AC02-06CH11357; AC02-05CH11231; NIH P41 GM108569; NIH S10RR025502; NYSTEM C029155; S10OD021527; P30 GM124169; DMR-1829070; GM-124166; DGE-1650441
OSTI ID:
1619536
Alternate ID(s):
OSTI ID: 1606437
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 11 Journal Issue: 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 35 works
Citation information provided by
Web of Science

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