Detection of a single,metal-independent aminopeptidase activity in polymyxin-extracts from Escherichia coli B |
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| Authors: | M Teuber G Cerny |
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| Institution: | (1) Abt. Mikrobiologie, Institut für Botanik der Technischen Universität München, München, Germany |
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| Abstract: | Summary The supernatant of Escherichia coli B autolysed in the presence of polymyxin B contains a single, metal-independent aminopeptidase activity (E.C.-group 3.4.1). The enzyme cleaves the 4-nitroanilides of L-alanine, L-lysine, L-leucine, glycine, and weakly L-phenylalanine. The corresponding N-acetyl-L-alanine-, L-glutamic acid- and L-cysteine-derivatives are not attacked.Dedicated to Dr. Hans Poschenrieder on the occasion of his 75th birthday. |
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