Abstract:Meso-2,3-butanediol dehydrogenase (meso-2,3-BDH) catalyzes NAD -dependent conversion of meso-2,3-butanediol to acetoin, a crucial external energy storage molecule in fermentive bacteria. In this study, the active tunnel of meso-2,3-BDH was identified. The two short α helixes positioned away from the α4-helix possibly expose the hydrophobic ligand-binding cavity, gating the exit of product and cofactor from the activity pocket. Further MM/GBSA-binding free energy analysis shows that Phe212 and Asn146 function a… Show more
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