New antibiotics 4181-A and B from Streptomyces griseus; taxonomy, fermentation, isolation and characterization.

Capuramycin, a new nucleoside antibiotic. Taxonomy, fermentation, isolation and characterization.

A new antibiotic capuramycin was isolated from the culture filtrate of Streptomyces griseus 446-S3 by adsorption and partition column chromatography. Based on its chemical structure being an uracil nucleoside with a caprolactam substituent, this substance was named as capuramycin. This paper describes the taxonomy of a producing organism, fermentation, isolation, characterization and biological...

Isolation and characterization of a phage active against streptomyces griseus

Studies on a new antibiotic FR-900109. 1. Taxonomy, isolation and characterization.

FR-900109 is a new antibiotic obtained from fermentation broth of a streptomyces which was identified as Streptomyces prunicolor. Its elementary analysis and mass spectroscopic measurement suggest that the molecular formula is C27H32O9. It has an ultraviolet absorption maximum at 254 nm. The antibiotic is active against Gram-positive bacteria. Acute toxicity in mice is very low.

جداسازی و تأیید مولکولی سریع استرپتومایسس های تولید کننده آنتی بیوتیک استرپتومایسین

Introduction: Streptomyces species are mycelial, aerobic gram-positive bacteria that are isolated from soil and produce a diverse range of antibiotics. Streptomyces griseus produces the antibiotic, streptomycin and forms spores even in a liquid culture. The gene cluster for the production of Streptomycin antibiotic contains strR gene that encodes StrR, a pathway-specific regulator. Then, this p...

New antibiotics, griseusins A and B. Isolation and characterization.

New antibiotics, griseusins A and B were isolated from a strain of Streptomyces griseus. Both antibiotics have a 5-hydroxy-1, 4-naphthoquinone chromophore and their molecular formulae were determined to be C22H20O10 and C22H22O10, respectively. The griseusins are active against gram-positive bacteria.