7tx2

Crystal structure of human phenylethanolamine N-methyltransferase (PNMT) in complex with (2S)-2-amino-4-(((5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl)(4-(7,8-dichloro-1,2,3,4-tetrahydroisoquinolin-4-yl)butyl)amino)butanoic acidCrystal structure of human phenylethanolamine N-methyltransferase (PNMT) in complex with (2S)-2-amino-4-(((5-(6-amino-9H-purin-9-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl)(4-(7,8-dichloro-1,2,3,4-tetrahydroisoquinolin-4-yl)butyl)amino)butanoic acid

Structural highlights 7tx2 is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.43Å Ligands: , Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PNMT_HUMAN Converts noradrenaline to adrenaline. Publication Abstract from PubMed Phenylethanolamine N-methyltransferase (PNMT) catalyzes the S-adenosyl-l-methionine (SAM)-dependent methylation of norepinephrine to form epinephrine. Epinephrine is implicated in the regulation of blood pressure, respiration, Alzheimer's disease, and post-traumatic stress disorder (PTSD). Transition-state (TS) analogues bind their target enzymes orders of magnitude more tightly than their substrates. A synthetic strategy for first-generation TS analogues of human PNMT (hPNMT) permitted structural analysis of hPNMT and revealed potential for second-generation inhibitors [Mahmoodi, N.; J. Am. Chem. Soc. 2020, 142, 14222-14233]. A second-generation TS analogue inhibitor of PNMT was designed, synthesized, and characterized to yield a K(i) value of 1.2 nM. PNMT isothermal titration calorimetry (ITC) measurements of inhibitor 4 indicated a negative cooperative binding mechanism driven by large favorable entropic contributions and smaller enthalpic contributions. Cell-based assays with HEK293T cells expressing PNMT revealed a cell permeable, intracellular PNMT inhibitor with an IC(50) value of 81 nM. Structural analysis demonstrated inhibitor 4 filling catalytic site regions to recapitulate both norepinephrine and SAM interactions. Conformation of the second-generation inhibitor in the catalytic site of PNMT improves contacts relative to those from the first-generation inhibitors. Inhibitor 4 demonstrates up to 51,000-fold specificity for PNMT relative to DNA and protein methyltransferases. Inhibitor 4 also exhibits a 12,000-fold specificity for PNMT over the alpha(2)-adrenoceptor. Cell-Effective Transition-State Analogue of Phenylethanolamine N-Methyltransferase.,Mahmoodi N, Minnow YVT, Harijan RK, Bedard GT, Schramm VL Biochemistry. 2023 Aug 1;62(15):2257-2268. doi: 10.1021/acs.biochem.3c00103. Epub , 2023 Jul 19. PMID:37467463 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phenylethanolamine N-methyltransferase

spinqualitylabelsall models 7tx2, resolution 2.43Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image