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关于参与尿苷二磷酸-N-乙酰胞壁酰五肽合成的大肠杆菌酶的研究。

Studies on Escherichia coli enzymes involved in the synthesis of uridine diphosphate-N-acetyl-muramyl-pentapeptide.

作者信息

Lugtenberg E J

出版信息

J Bacteriol. 1972 Apr;110(1):26-34. doi: 10.1128/jb.110.1.26-34.1972.

Abstract

The specific activities of l-alanine:d-alanine racemase, d-alanine:d-alanine ligase, and the l-alanine, d-glutamic acid, meso-diaminopimelic acid, and d-alanyl-d-alanine adding enzymes were followed during growth of Escherichia coli. The specific activities were nearly independent of the growth phase. d-Alanine:d-alanine ligase was inhibited by d-alanyl-d-alanine, d-cycloserine, glycine, and glycyl-glycine. l-Alanine:d-alanine racemase was found to be sensitive to d-cycloserine, glycine, and glycyl-glycine. The l-alanine adding enzyme was inhibited by glycine and glycyl-glycine.

摘要

在大肠杆菌生长过程中,对L-丙氨酸:D-丙氨酸消旋酶、D-丙氨酸:D-丙氨酸连接酶以及L-丙氨酸、D-谷氨酸、内消旋二氨基庚二酸和D-丙氨酰-D-丙氨酸添加酶的比活性进行了跟踪。这些比活性几乎与生长阶段无关。D-丙氨酸:D-丙氨酸连接酶受到D-丙氨酰-D-丙氨酸、D-环丝氨酸、甘氨酸和甘氨酰甘氨酸的抑制。发现L-丙氨酸:D-丙氨酸消旋酶对D-环丝氨酸、甘氨酸和甘氨酰甘氨酸敏感。L-丙氨酸添加酶受到甘氨酸和甘氨酰甘氨酸的抑制。

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