Mutation of Cysteine-295 to Alanine in Secondary Alcohol Dehydrogenase from Thermoanaerobacter ethanolicus Affects the Enantioselectivity and Substrate Specificity of Ketone Reductions
作者:Christian Heiss、Maris Laivenieks、J.Gregory Zeikus、Robert S Phillips
DOI:10.1016/s0968-0896(01)00073-6
日期:2001.7
The mutation of Cys-295 to alanine in Thermoanaerobacter ethanolicus secondaryalcoholdehydrogenase (SADH) was performed to give C295A SADH, on the basis of molecular modeling studies utilizing the X-ray crystal structure coordinates of the highly homologous T. brockii secondaryalcoholdehydrogenase (1YKF.PDB). This mutant SADH has activity for 2-propanol comparable to wild-type SADH. However, the
A Pseudomonas sp. alcohol dehydrogenase with broad substrate specificity and unusual stereospecificity for organic synthesis
作者:Curt W. Bradshaw、Hong Fu、Gwo Jenn Shen、Chi Huey Wong
DOI:10.1021/jo00031a036
日期:1992.2
A new alcohol dehydrogenase from Pseudomonas sp. strain PED has been isolated and characterized. The enzyme exhibits a broad substrate specificity, accepting aromatic, cyclic, and aliphatic compounds as substrates. The K(m) values were determined as 525-mu-M for NAD and 75-mu-M for 2-propanol with a specific activity of 36 U/mg. The kinetic mechanism is ordered bi-bi with the cofactor binding first and releasing last. The enzyme transfers the pro-R hydride of NADH to the si face of carbonyl compounds to yield (R) alcohols. Synthetic-scale reductions of a number of representative compounds were carried out in high enantiomeric excess with in situ regeneration of NADH using 2-propanol as the hydride source and the same enzyme as catalyst.
Kornilov, A. N.; Sorochinskii, A. E.; Yagupol'skii, Yu. L., Journal of Organic Chemistry USSR (English Translation), 1988, vol. 24, # 6, p. 1210 - 1211
作者:Kornilov, A. N.、Sorochinskii, A. E.、Yagupol'skii, Yu. L.、Kukhar', V. P.
DOI:——
日期:——
KORNILOV, A. M.;SOROCHINSKIJ, A. E.;GALUSHKO, S. V.;BELIK, M. YU.;KUXAR, +, SINTEZ I ISSLED. PROSTAGLANDINOV, MINSK,(1989) S. 81
作者:KORNILOV, A. M.、SOROCHINSKIJ, A. E.、GALUSHKO, S. V.、BELIK, M. YU.、KUXAR, +
DOI:——
日期:——
KORNILOV, A. M.;SOROCHINSKIJ, A. E.;KUXAR, V. P., ZH. ORGAN. XIMII, 25,(1989) N2, S. 2520-2523
作者:KORNILOV, A. M.、SOROCHINSKIJ, A. E.、KUXAR, V. P.