نتایج جستجو برای: streptomyces rimosus

تعداد نتایج: 13472  

2013
Florence E. Pethick Alison C. MacFadyen Zhenyu Tang Vartul Sangal Tze-Tze Liu Ju Chu Gregor Kosec Hrvoje Petkovic Meijin Guo Ralph Kirby Paul A. Hoskisson Paul R. Herron Iain S. Hunter

We report the draft genome of Streptomyces rimosus (ATCC 10970), a soil isolate that produces oxytetracycline, a commercially important and clinically useful antibiotic.

Journal: :Journal of bacteriology 1966
M Polsinelli M Beretta

Polsinelli, M. (University of Pavia, Pavia, Italy), and Maria Beretta. Genetic recombination in crosses between Streptomyces aureofaciens and Streptomyces rimosus. J. Bacteriol. 91:63-68. 1966.-Biochemical mutants were obtained from Streptomyces rimosus and S. aureofaciens by ultraviolet irradiation. Crosses were performed between auxotrophic strains of S. rimosus and S. aureofaciens with posit...

2013
Zhitang Lu Dawei Zhang Zhi Liu Ye Li

This research is aimed to improve the oxytetracycline production from Streptomyces rimosus. Five relatively high oxytetracycline yielding strains were obtained by nitrosoguanidine mutation of the protoplast of initial oxytetracycline producing strain Streptomyces rimosus JH and then subjected to genome shuffling as parental strains. The protoplasts of the five parental strains were prepared and...

Journal: :Journal of general microbiology 1988
J P Reynes T Calmels D Drocourt G Tiraby

Determinants of tetracycline resistance have been cloned from two different tetracycline-producing industrial strains of Streptomyces into Streptomyces lividans using the plasmid vector pUT206. Three plasmids, pUT250 and pUT260 with a 9.5 and a 7.5 kb insert respectively of Streptomyces rimosus DNA, and pUT270 with a 14.0 kb insert of Streptomyces aureofaciens DNA, conferring resistance to tetr...

2010
Victoria Gesheva Stephan Angeloff

The kinetic of the enzyme production of Streptomyces rimosus, a producer of exoproteases was investigated in conditions of nitrogen limitation.The maxima of fibrinolytic and caseinolytic activities by Streptomyces rimosus were reached at 84 h, respectively 96 h. Values of activities were increased 5-fold with those on initial medium. The ultrastructure changes were followed. In the earlier hour...

Journal: :Journal of microbiology and biotechnology 2015
Mee Youn Lee Hyang Yeon Kim Sarah Lee Jeong-Gu Kim Joo-Won Suh Choong Hwan Lee

Secondary metabolite-based chemotaxonomic classification of Streptomyces (8 species, 14 strains) was performed using ultraperformance liquid chromatography-quadrupole-time-offlight- mass spectrometry with multivariate statistical analysis. Most strains were generally well separated by grouping under each species. In particular, S. rimosus was discriminated from t he r emaining s ev en s pecies ...

Journal: :FEMS microbiology letters 2005
Ivan Ahel Andreja Mikoc Vera Gamulin

Streptomyces RecA proteins are characterized by a conserved, positively charged extension of unknown function appended at their C-termini. To investigate the function of this element, we introduced the Streptomyces rimosus recA gene and its mutant form encoding the protein with a C-terminal deletion into S. rimosus. Both transcript and protein levels were dramatically increased in the strain ex...

Journal: :international journal of environmental research 2009
m.n. sahmoune k. louhab a. boukhiar

in the present investigation, dead bacterium biomass streptomyces rimosus was used as an inexpensive and efficient biosorbent for cr (iii) removal from aqueous solution. the bacterial biomass was treated with 0.1 m naoh. sorption level of 65 mg/g was observed at ph 4.8 while precipitation effect augmented this value at higher ph range. chromium desorption increased with decreasing desorption ag...

Journal: :Microbiology and molecular biology reviews : MMBR 2006
Hrvoje Petković John Cullum Daslav Hranueli Iain S Hunter Natasa Perić-Concha Jasenka Pigac Arinthip Thamchaipenet Dusica Vujaklija Paul F Long

From a genetic standpoint, Streptomyces rimosus is arguably the best-characterized industrial streptomycete as the producer of oxytetracycline and other tetracycline antibiotics. Although resistance to these antibiotics has reduced their clinical use in recent years, tetracyclines have an increasing role in the treatment of emerging infections and noninfective diseases. Procedures for in vivo a...

Journal: :Applied and environmental microbiology 1995
J Pigac H Schrempf

Usually plasmid DNA is introduced into Streptomyces strains by polyethylene glycol-mediated transformation of protoplasts. However, many Streptomyces strains are only poorly or not at all transformable via protoplasts. Therefore, we have optimized the parameters critical for the application of electrotransformation of plasmid DNA into Streptomyces species. The most critical parameters evaluated...

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