1xdw | pdb_00001xdw

NAD+-dependent (R)-2-Hydroxyglutarate Dehydrogenase from Acidaminococcus fermentans

spinqualitylabelsall models 1xdw, resolution 1.98Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1xdw is a 1 chain structure with sequence from Acidaminococcus fermentans. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Gene: hgh (Acidaminococcus fermentans) Resources: FirstGlance, OCA, RCSB, PDBsum 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 NAD(+)-dependent (R)-2-hydroxyglutarate dehydrogenase (HGDH) catalyses the reduction of 2-oxoglutarate to (R)-2-hydroxyglutarate and belongs to the d-2-hydroxyacid NAD(+)-dependent dehydrogenase (d-2-hydroxyacid dehydrogenase) protein family. Its crystal structure was determined by phase combination to 1.98 A resolution. Structure-function relationships obtained by the comparison of HGDH with other members of the d-2-hydroxyacid dehydrogenase family give a chemically satisfying view of the substrate stereoselectivity and catalytic requirements for the hydride transfer reaction. A model for substrate recognition and turnover is discussed. The HGDH active site architecture is structurally optimized to recognize and bind the negatively charged substrate 2-oxoglutarate. The structural position of the side chain of Arg52, and its counterparts in other family members, strongly correlates with substrate specificity towards substitutions at the C3 atom (linear or branched substrates). Arg235 interacts with the substrate's alpha-carboxylate and carbonyl groups, having a dual role in both substrate binding and activation, and the gamma-carboxylate group can dock at an arginine cluster. The proton-relay system built up by Glu264 and His297 permits His297 to act as acid-base catalyst and the 4Re-hydrogen from NADH is transferred as hydride to the carbonyl group Si-face leading to the formation of the correct enantiomer (R)-2-hydroxyglutarate. Structural basis for stereo-specific catalysis in NAD(+)-dependent (R)-2-hydroxyglutarate dehydrogenase from Acidaminococcus fermentans.,Martins BM, Macedo-Ribeiro S, Bresser J, Buckel W, Messerschmidt A FEBS J. 2005 Jan;272(1):269-81. PMID:15634349 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA