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Structure of the complex of active site metal-depleted horse liver alcohol dehydrogenase and NADH


Structure of the complex of active site metal-depleted horse liver alcohol dehydrogenase and NADH



EMBO Journal 2(5): 685-689



ISSN/ISBN: 0261-4189

PMID: 6357784

The complex between active site-specific metal-depleted horse liver alcohol dehydrogenase and NADH has been studied with X-ray crystallographic methods to 2.9 A resolution. The electron density maps revealed that only the catalytic zinc ions are removed, whereas the non-catalytic zinc sites ae fully occupied. A gross conformational change in the protein induced by co-enzyme binding takes place in this enzyme species despite the absence of the metal ion in the catalytic center. This circumstance is of great importance in the understanding and further analysis of the trigger mechanisms operating during the conformation transition in alcohol dehydrogenase, since the catalytic center is located at the hinge region for a domain rotation in the subunit, and the metal atom is essential for catalysis. The overall protein structure is the same as that of an NADH complex of the native zinc enzyme and the co-enzyme is bound in a similar manner. The local structural changes observed are restricted to the empty metal binding site.

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Accession: 017146503

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Related references

Structure of the complex of active site metal depleted horse liver alcohol dehydrogenase ec 1.1.1.1 and nadh. EMBO (European Molecular Biology Organization) Journal 2(5): 685-690, 1983

Structure of the complex of active site metal-depleted horse liver alcohol dehydrogenase and Nadh. The Embo Journal 2(5): 685-689, 1983

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