1cdo

ALCOHOL DEHYDROGENASE (E.C.1.1.1.1) (EE ISOZYME) COMPLEXED WITH NICOTINAMIDE ADENINE DINUCLEOTIDE (NAD), AND ZINC

spinqualitylabelsall models 1cdo, resolution 2.05Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cdo is a 2 chain structure with sequence from Gadus callarias. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NAD, ZN Activity: Alcohol dehydrogenase, with EC number 1.1.1.1 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 The structural framework of cod liver alcohol dehydrogenase is similar to that of horse and human alcohol dehydrogenases. In contrast, the substrate pocket differs significantly, and main differences are located in three loops. Nevertheless, the substrate pocket is hydrophobic like that of the mammalian class I enzymes and has a similar topography in spite of many main-chain and side-chain differences. The structural framework of alcohol dehydrogenase is also present in a number of related enzymes like glucose dehydrogenase and quinone oxidoreductase. These enzymes have completely different substrate specificity, but also for these enzymes, the corresponding loops of the substrate pocket have significantly different structures. The domains of the two subunits in the crystals of the cod enzyme further differ by a rotation of the catalytic domains by about 6 degrees. In one subunit, they close around the coenzyme similarly as in coenzyme complexes of the horse enzyme, but form a more open cleft in the other subunit, similar to the situation in coenzyme-free structures of the horse enzyme. The proton relay system differs from the mammalian class I alcohol dehydrogenases. His 51, which has been implicated in mammalian enzymes to be important for proton transfer from the buried active site to the surface is not present in the cod enzyme. A tyrosine in the corresponding position is turned into the substrate pocket and a water molecule occupies the same position in space as the His side chain, forming a shorter proton relay system. Crystal structure of cod liver class I alcohol dehydrogenase: substrate pocket and structurally variable segments.,Ramaswamy S, el Ahmad M, Danielsson O, Jornvall H, Eklund H Protein Sci. 1996 Apr;5(4):663-71. PMID:8845755 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Alcohol dehydrogenase 3D structures

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