PF-9366 is a methionine adenosyltransferase 2A allosteric inhibitor (human Mat2A IC50/Kd = 420 nM/170 nM) whose binding site overlaps with that of the Mat2A regulator, Mat2B. PF-9366 inhibits cellular SAM production in a Mat2B-competitive manner (IC50 post 6-hr treatment = 1.2 μM wihout vs. 0.86 μM with Mat2B knockdown; H520 lung carcinoma cells) without antiproliferation efficacy in cancer cultures due to an induction of Mat2A upregulation upon allosteric inhibition. Similar to Mat2B, PF-9366 allosteric binding alters Mat2A active site, causing increased substrate affinity and decreased enzyme turnover.
Activated macrophages adapt their metabolic pathways to drive the pro-inflammatory phenotype, but little is known about the biochemical underpinnings of this process. Here, we find that lipopolysaccharide (LPS) activates the pentose phosphate pathway, the serine synthesis pathway, and one-carbon metabolism
Nature chemical biology, 13(7), 785-792 (2017-05-30)
S-Adenosyl-L-methionine (SAM) is an enzyme cofactor used in methyl transfer reactions and polyamine biosynthesis. The biosynthesis of SAM from ATP and L-methionine is performed by the methionine adenosyltransferase enzyme family (Mat; EC 2.5.1.6). Human methionine adenosyltransferase 2A (Mat2A), the extrahepatic
Methylation is an underpinning process of life and provides control for biological processes such as DNA synthesis, cell growth, and apoptosis. Methionine adenosyltransferases (MAT) produce the cellular methyl donor, S-Adenosylmethionine (SAMe). Dysregulation of SAMe level is a relevant event in
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