摘要:
This paper reports the activity of glutamic oxalacetic aminotransferase (GOT) from pig heart and bacteria for racemic 4-hydroxy-, 4-methyl-, and 4-ethyl-2-ketoglutaric acids. These compounds are good substrates for GOT with V(max) values of, respectively, 70, 90, and 130% relative to the natural substrate, 2-ketoglutaric acid. GOT displays high enantioselectivity toward 4-methyl-2-ketoglutaric acid and 4-ethyl-2-ketoglutaric acid; the synthesis of both diastereoisomers of the corresponding 4-substituted L-glutamic acids is thus possible.