2obf | pdb_00002obf

Structure of K57A hPNMT with inhibitor 3-Hydroxymethyl-7-(N-4-chlorophenylaminosulfonyl)-THIQ and AdoHcy (SAH)

spinqualitylabelsall models 2obf, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2obf is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: F83, SAH Related: 2g8n, 1hnn Activity: Phenylethanolamine N-methyltransferase, with EC number 2.1.1.28 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [PNMT_HUMAN] Converts noradrenaline to adrenaline. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Shape complementarity is a fundamental principle of inhibitor design. Here we show that an enzyme for which the crystal structure has been determined (phenylethanolamine N-methyltransferase, PNMT) conceals a cryptic binding site. This site is revealed upon binding of inhibitors that are double the size of the physiological substrate. These large inhibitors are not predicted to bind in that they protrude through the accessible surface calculated from a PNMT/7-aminosulfonyl-1,2,3,4-tetrahydroisoquinoline (SK&F 29661) crystal structure, yet they are potent inhibitors of PNMT. We determined structures of the enzyme complexed with large inhibitors and found that the volume of the active site increases by 140 A3 upon binding. Changes in active site size and shape are brought about by unfavorable side chain conformations and rigid body helix motions. The energetic cost is modest, estimated at 2-3 kcal/mol from mutational analyses. Our findings further underline the importance of protein flexibility in structure-based inhibitor design studies. Enzyme adaptation to inhibitor binding: a cryptic binding site in phenylethanolamine N-methyltransferase.,Gee CL, Drinkwater N, Tyndall JD, Grunewald GL, Wu Q, McLeish MJ, Martin JL J Med Chem. 2007 Oct 4;50(20):4845-53. Epub 2007 Sep 11. PMID:17845018 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Phenylethanolamine N-methyltransferase

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