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Hydrolysis of alanine oligopeptides by an enzyme located in the membrane of Mycoplasma laidlawii

1972; Elsevier BV; Volume: 290; Linguagem: Inglês

10.1016/0005-2736(72)90069-7

1879-2642

M Pecht, E. Giberman, Avi Keysary, J. Yariv, Ephraim Katchalski,

Bacteriophages and microbial interactions

Membranes obtained from Mycoplasma laidlawii and whole cells suspended in an isotonic salt solution cleva the N(α)-termionall-alanine residue of oligoalanine peptides of the general formula Ala(l)-[Ala(l)-Ala(d)]n, n = 2,4,8. The intact cells were found to be impermeable to l-alaine when suspended in an isotonic salt solution Entry of l-alanine into the cells was observed only whens suspended in the appropriate growth medium.