1qax

TERNARY COMPLEX OF PSEUDOMONAS MEVALONII HMG-COA REDUCTASE WITH HMG-COA AND NAD+

spinqualitylabelsall models 1qax, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1qax is a 2 chain structure with sequence from Pseudomonas mevalonii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.8Å Ligands: HMG, NAD Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function MVAA_PSEMV P.mevalonii can use mevalonate as sole carbon source. With this enzyme mevalonate is deacetylated to HMG-CoA. 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 3-hydroxy-3-methylglutaryl-CoA (HMG-CoA) reductase is the rate-limiting enzyme and the first committed step in the biosynthesis of cholesterol in mammals. We have determined the crystal structures of two nonproductive ternary complexes of HMG-CoA reductase, HMG-CoA/NAD+ and mevalonate/NADH, at 2.8 A resolution. In the structure of the Pseudomonas mevalonii apoenzyme, the last 50 residues of the C terminus (the flap domain), including the catalytic residue His381, were not visible. The structures of the ternary complexes reported here reveal a substrate-induced closing of the flap domain that completes the active site and aligns the catalytic histidine proximal to the thioester of HMG-CoA. The structures also present evidence that Lys267 is critically involved in catalysis and provide insights into the catalytic mechanism. Substrate-induced closure of the flap domain in the ternary complex structures provides insights into the mechanism of catalysis by 3-hydroxy-3-methylglutaryl-CoA reductase.,Tabernero L, Bochar DA, Rodwell VW, Stauffacher CV Proc Natl Acad Sci U S A. 1999 Jun 22;96(13):7167-71. PMID:10377386 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also HMG-CoA Reductase 3D structures

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