PMID- 25001371 OWN - NLM STAT- MEDLINE DCOM- 20150901 LR - 20211021 IS - 1573-4935 (Electronic) IS - 0144-8463 (Print) IS - 0144-8463 (Linking) VI - 34 IP - 4 DP - 2014 Aug 11 TI - Novel human D-amino acid oxidase inhibitors stabilize an active-site lid-open conformation. LID - 10.1042/BSR20140071 [doi] LID - e00133 AB - The NMDAR (N-methyl-D-aspartate receptor) is a central regulator of synaptic plasticity and learning and memory. hDAAO (human D-amino acid oxidase) indirectly reduces NMDAR activity by degrading the NMDAR co-agonist D-serine. Since NMDAR hypofunction is thought to be a foundational defect in schizophrenia, hDAAO inhibitors have potential as treatments for schizophrenia and other nervous system disorders. Here, we sought to identify novel chemicals that inhibit hDAAO activity. We used computational tools to design a focused, purchasable library of compounds. After screening this library for hDAAO inhibition, we identified the structurally novel compound, 'compound 2' [3-(7-hydroxy-2-oxo-4-phenyl-2H-chromen-6-yl)propanoic acid], which displayed low nM hDAAO inhibitory potency (Ki=7 nM). Although the library was expected to enrich for compounds that were competitive for both D-serine and FAD, compound 2 actually was FAD uncompetitive, much like canonical hDAAO inhibitors such as benzoic acid. Compound 2 and an analog were independently co-crystalized with hDAAO. These compounds stabilized a novel conformation of hDAAO in which the active-site lid was in an open position. These results confirm previous hypotheses regarding active-site lid flexibility of mammalian D-amino acid oxidases and could assist in the design of the next generation of hDAAO inhibitors. FAU - Terry-Lorenzo, Ryan T AU - Terry-Lorenzo RT AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Chun, Lawrence E AU - Chun LE AD - daggerEmerald Bio, Bainbridge Island, WA 98110, U.S.A. FAU - Brown, Scott P AU - Brown SP AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Heffernan, Michele L R AU - Heffernan ML AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Fang, Q Kevin AU - Fang QK AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Orsini, Michael A AU - Orsini MA AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Pollegioni, Loredano AU - Pollegioni L FAU - Hardy, Larry W AU - Hardy LW AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Spear, Kerry L AU - Spear KL AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. FAU - Large, Thomas H AU - Large TH AD - *Discovery Research Department, Sunovion Pharmaceuticals, Marlborough, MA 01752, U.S.A. LA - eng PT - Journal Article DEP - 20140811 PL - England TA - Biosci Rep JT - Bioscience reports JID - 8102797 RN - 0 (Carrier Proteins) RN - 0 (Enzyme Inhibitors) RN - 0 (Receptors, N-Methyl-D-Aspartate) RN - 452VLY9402 (Serine) RN - EC 1.4.3.3 (D-Amino-Acid Oxidase) SB - IM MH - Carrier Proteins/metabolism MH - Catalytic Domain/*drug effects MH - D-Amino-Acid Oxidase/*antagonists & inhibitors MH - Enzyme Inhibitors/*pharmacology MH - Humans MH - Receptors, N-Methyl-D-Aspartate/metabolism MH - Schizophrenia/metabolism MH - Serine/metabolism PMC - PMC4127593 EDAT- 2014/07/09 06:00 MHDA- 2015/09/02 06:00 PMCR- 2014/08/11 CRDT- 2014/07/09 06:00 PHST- 2014/07/09 06:00 [entrez] PHST- 2014/07/09 06:00 [pubmed] PHST- 2015/09/02 06:00 [medline] PHST- 2014/08/11 00:00 [pmc-release] AID - BSR20140071 [pii] AID - e00133 [pii] AID - 10.1042/BSR20140071 [doi] PST - epublish SO - Biosci Rep. 2014 Aug 11;34(4):e00133. doi: 10.1042/BSR20140071.