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Title: Discovery of Bisubstrate Inhibitors of Nicotinamide N-Methyltransferase (NNMT)

Journal Article · · Journal of Medicinal Chemistry

Nicotinamide N-methyltransferase (NNMT) catalyzes the N-methylation of pyridine-containing compounds using the cofactor S-5'-adenosyl-l-methionine (SAM) as the methyl group donor. Through the regulation of the levels of its substrates, cofactor, and products, NNMT plays an important role in physiology and pathophysiology. Overexpression of NNMT has been implicated in various human diseases. Potent and selective small-molecule NNMT inhibitors are valuable chemical tools for testing biological and therapeutic hypotheses. However, very few NNMT inhibitors have been reported. Here, we describe the discovery of a bisubstrate NNMT inhibitor MS2734 (6) and characterization of this inhibitor in biochemical, biophysical, kinetic, and structural studies. Importantly, we obtained the first crystal structure of human NNMT in complex with a small-molecule inhibitor. The structure of the NNMT–6 complex has unambiguously demonstrated that 6 occupied both substrate and cofactor binding sites. Here, the findings paved the way for developing more potent and selective NNMT inhibitors in the future.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; U.S. National Inst. of Health; National Natural Science Foundation of China (NSFC); NIH-ORIP HEI
Grant/Contract Number:
AC02-06CH11357; R01GM122749; R01CA218600; R01HD088626; 21302134; P41 GM103403; S10OD021527
OSTI ID:
1431360
Journal Information:
Journal of Medicinal Chemistry, Vol. 61, Issue 4; ISSN 0022-2623
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 43 works
Citation information provided by
Web of Science

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