Characterization of two peptide-transport systems in Streptococcus faecalis.
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منابع مشابه
The characteristics of peptide uptake in Streptococcus faecalis: studies on the transport of natural peptides and antibacterial phosphonopeptides.
Transport of natural peptides and antibacterial phosphonopeptide analogues was studied in Streptococcus faecalis ATCC 9790. Competition studies, and the isolation of peptide-transport deficient mutants, indicate the presence of two peptide permeases. One is a high-rate system used by dipeptides, and to a lesser extent tripeptides; the other is a low-rate oligopeptide system. Following uptake, p...
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Aminophosphonic acids analogous to glutamic acid, aspartic acid, alanine, and valine were actively accumulated by Lactobacillus plantarum. Uptake was dependent on the availability of glucose and, in all cases, the estimated intracellular concentrations substantially exceeded extracellular levels. During uptake, there was little metabolism of tritiated 2-amino-3-phosphonopropionic acid (APP), th...
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Streptococcus faecalis strains harboring the conjugative plasmid pAD1 excrete a small peptide, iAD1, which inhibits the sex pheromone cAD1. Studies making use of the host strain Streptococcus faecium 9790, which normally does not excrete peptide pheromones, suggest that iAD1 may be determined directly by pAD1.
متن کاملA D-enantiomer of the antimicrobial peptide GL13K evades antimicrobial resistance in the Gram positive bacteria Enterococcus faecalis and Streptococcus gordonii
Antimicrobial peptides represent an alternative to traditional antibiotics that may be less susceptible to bacterial resistance mechanisms by directly attacking the bacterial cell membrane. However, bacteria have a variety of defense mechanisms that can prevent cationic antimicrobial peptides from reaching the cell membrane. The L- and D-enantiomers of the antimicrobial peptide GL13K were teste...
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عنوان ژورنال:
- Biochemical Society transactions
دوره 8 6 شماره
صفحات -
تاریخ انتشار 1980