Effect of carbon dioxide on the aspartic acid requirement for proteinase biosynthesis by Streptococcus faecalis var. liquefaciens.
نویسندگان
چکیده
Non-proliferating cells of Streptococcus faecalis var. liquefaciens required aspartic acid for proteinase biosynthesis in the absence of CO(2) but not in the presence of CO(2).
منابع مشابه
Stimulation of proteinase biosynthesis by canavanine in streptococcus faecalis var. liquefaciens.
l-Canavanine, an analogue of arginine, was found to stimulate the synthesis of an extracellular proteinase in Streptococcus faecalis var. liquefaciens. Cells grown in a synthetic medium containing 10(-4)m arginine and 10(-4)m canavanine produced almost twice as much proteinase as cells grown in 2 x 10(-3)m arginine alone; total growth was the same in both media. Hydrolyzed proteinase samples we...
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Washed cells of Streptococcus faecalis var. liquefaciens, when harvested from media that supported protease biosynthesis, continued to release this extracellular enzyme in phosphate buffer. The addition of ethylenediaminetetraacetic acid (EDTA) halted the secretion. If zinc ions were added to the EDTA-treated cells before 45 to 60 min had elapsed, a fraction of the anticipated enzyme activity w...
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Hammel, Jay M. (The Pennsylvania State University, University Park) and L. N. Zimmerman. Growth stimulation of Streptococcus faecalis var. liquefaciens by canavanine. J. Bacteriol. 86:490-493. 1963.-l-Canavanine, a competitive inhibitor of arginine, was found to stimulate the growth of Streptococcus faecalis var. liquefaciens in the presence of arginine. This growth stimulation by canavanine wa...
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The proliferation of Streptococcus faecalis var. liquefaciens on two varieties of beans, and on corn, rye, and cabbage was investigated. Comparisons were made with growth patterns on these same plants exhibited by S. lactis and Lactobacillus plantarum. The ability of each of the bacteria to multiply and to spread to new plant parts as they developed from seed was studied under several environme...
متن کاملAspartate biosynthesis is essential for the growth of Streptococcus thermophilus in milk, and aspartate availability modulates the level of urease activity.
We investigated the carbon dioxide metabolism of Streptococcus thermophilus, evaluating the phenotype of a phosphoenolpyruvate carboxylase-negative mutant obtained by replacement of a functional ppc gene with a deleted and inactive version, Deltappc. The growth of the mutant was compared to that of the parent strain in a chemically defined medium and in milk, supplemented or not with L-aspartic...
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ورودعنوان ژورنال:
- Journal of bacteriology
دوره 100 2 شماره
صفحات -
تاریخ انتشار 1969