the occurrence of a new enzyme, aminomalonic acid decarboxylase, in the posterior silk-gland of silkworm and in rat liver1. The fact that this enzyme was first observed in silkworm, which has a remarkably high activity of glycine synthesis2, seems to suggest a physiological significance of the enzyme in the biosynthesis of glycine, although natural occurrence of this amino-acid has hitherto not been
Effects of Gln102Arg and Cys97Gly mutations on the structural specificity and stereospecificity of the L-lactate dehydrogenase from Bacillus stearothermophilus
作者:Helmut K. W. Kallwass、Marcel A. Luyten、Wendy Parris、Marvin Gold、Cyril M. Kay、J. Bryan Jones
DOI:10.1021/ja00038a016
日期:1992.6
The L-lactatedehydrogenase of Bacillusstearothermophilus (BSLDH) is a thermostable enzyme with considerable potential for applications in asymmetric synthesis. An understanding of the factors controlling its structural specificity and stereospecificity is therefore of interest. In this paper the effects of GIn 102→Arg and Cys97→Gly mutations have been evaluated. In a survey of thirteen 2-keto acids