Department of Environmental Chemistry and Engineering, Faculty of Engineering, Oita University, Oita 870-11, Japan.
Appl Environ Microbiol. 1988 Nov;54(11):2767-70. doi: 10.1128/aem.54.11.2767-2770.1988.
A bacterial strain that produces d-aminoacylase was isolated from soil and identified as Alcaligenes denitrificans subsp. xylosoxydans MI-4. l-Aminoacylase activity in this strain was only 1 to 2% of d-aminoacylase activity. d-Aminoacylase was inducibly produced. N-Acetyl-dl-leucine was the best inducer, and the d-isomer had the ability to induce the enzyme. Enzymatic resolution of N-acetyl-dl-methionine with the crude enzyme was carried out, and the d/l ratio in the resolved methionine was approximately 100/7, suggesting that resolution with crude enzymes may become possible by removing small amounts of the contaminated l-form with l-amino acid oxidase.
从土壤中分离到一株产 d-氨基酰化酶的细菌,并鉴定为黄杆菌属(Alcaligenes)的木质糖氧化亚硝化亚种(subsp. xylosoxydans)MI-4。该菌的 l-氨基酰化酶活仅为 d-氨基酰化酶活的 1%~2%。d-氨基酰化酶是可诱导产生的。N-乙酰-dl-亮氨酸是最佳诱导物,且 d-异构体具有诱导酶产生的能力。用粗酶进行 N-乙酰-dl-蛋氨酸的酶法拆分,拆分得到的蛋氨酸的 d/l 比约为 100/7,表明通过用 l-氨基酸氧化酶去除少量污染的 l-型,粗酶拆分可能成为可能。