STREPTOMYCES LAVENDULAE AND STREPTOMYCES VENEZUELAE
نویسندگان
چکیده
منابع مشابه
Streptomyces lavendulae and Streptomyces venezuelae.
With the growing economic significance of some Streptomyces species, the necessity of establishing their precise characteristies in well-defined specific terms becomes of great theoretical and practical importance (Waksman, 1957). The purpose of this paper is to present a comparative study of the main morphological, physiological, and biochemical characteristics of cultures belonging to the Str...
متن کاملStudies on Streptomyces lavendulae.
Since the isolation of streptothricin by Waksman and Woodruff in 1942 from a strain of Streptomyces lavendulae, numerous reports have appeared concerning the ability of different actinomycetes to produce this antibiotic or closely related compounds. In most of the antibiotic screening programs, streptothricin and streptothricinlike substances are among the first to be commonly encountered as pr...
متن کاملComposition and ultrastructure of Streptomyces venezuelae.
Streptomyces venezuelae is a filamentous bacterium with branching vegetative hyphae embedded in the substrate and aerial hyphae bearing spores. The exterior of the spore is inlaid with myriads of tiny rods which can be removed with xylene. The spore wall is approximately 30 nanometers thick. Occasionally, it can be seen that the plasma membrane and the membranous bodies within a spore are conne...
متن کاملChloramphenicol resistance in Streptomyces: cloning and characterization of a chloramphenicol hydrolase gene from Streptomyces venezuelae.
A 6.5 kb DNA fragment containing a chloramphenicol-resistance gene of Streptomyces venezuelae ISP5230 was cloned in Streptomyces lividans M252 using the high-copy-number plasmid vector pIJ702. The gene was located within a 2.4 kb KpnI-SstI fragment of the cloned DNA and encoded an enzyme (chloramphenicol hydrolase) that catalysed removal of the dichloroacetyl moiety from the antibiotic. The dea...
متن کاملSelf - protection Mechanism in D - Cycloserine - producing Streptomyces lavendulae
An antibiotic, D-cycloserine (DCS), inhibits the catalytic activities of alanine racemase (ALR) and D-alanylD-alanine ligase (DDL), which are necessary for the biosynthesis of the bacterial cell wall. In this study, we cloned both genes encoding ALR and DDL, designated alrS and ddlS, respectively, from DCS-producing Streptomyces lavendulae ATCC25233. Each gene product was purified to homogeneit...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1958
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.75.4.383-389.1958