background: the appearance of multi-drug resistant microorganisms is becoming a global problem. already several strategies have been employed for overcoming antibiotic resistance issue. developing new antimicrobial compounds from microbial source could be a beneficial solution. hence screening programs in order to discover new antibiotics from microbial entities is interesting. because of high ...

The marine environment represents a largely untapped source for isolation of new microorganisms with potential to produce biologically active secondary metabolites. Among such microorganisms, Gram-positive actinomycete bacteria are of special interest, since they are known to produce chemically diverse compounds with a wide range of biological activities. We have set out to isolate and characte...

Screening of new insecticidal and acaricidal antibiotics was carried out with reference to anti-brine shrimp activity from actinomycete strains isolated from marine environments. Of 200 actinomycete isolates, one isolate was found to produce a new substance, altemicidin. The strain was isolated from sea mud collected at Gamo, Miyagi Prefecture, Japan, and identified as Streptomyces sioyaensis S...

Mutants of the methylotrophic actinomycete Amycolaropsis methanolica unable to grow on methanol as carbon source were isolated and characterized. Mutants specifically affected in methanol utilization were deficient in formaldehyde assimilation. Mutants blocked in the first step of primary alcohol oxidation (Cl-C4) had lost activity of the tetrazolium-dependent alcohol dehydrogenase, a three-com...

the methylotrophic thermo tolerant actinomycete strain 381, was isolated from a compost sample, assimilated methanol during growth. methanol dehydrogenase could not be detected in cell extracts using dye-linked assays in the absence of nad+. dichlorophenol-indophenol-linked methanol oxidation was detected in broken cell suspensions in the presence of nad+ and the absence of cyanide. taxonomic s...

Streptococcus gordonii ATCC 10558(T) was isolated from a patient with infective endocarditis in 1946 and announced as a type strain in 1989. Here, we report the 2,154,510-bp draft genome sequence of S. gordonii ATCC 10558(T). This sequence will contribute to knowledge about the pathogenesis of infective endocarditis.

Electron microscopy of the hindgut showed that actinomycete-like bacteria were the principal microbial associates of two African species of soil-feeding termites. Elongated cuticular spines provided attachment.

Interspecies interaction of actinomycetes will express new gene clusters and may therefore affect the pigmentation, sporulation and production of secondary metabolites. Actinomycetes strains were isolated from Howze Soltan Salt Lake. Binary actinomycete interaction assay was conducted to evaluate its effect on colony morphology and antibiotic production. The molecular identification of the indu...

This study was performed to isolate actinomycete colonies having antibacterial activity from soil samples collected from different places around Rajshahi, Bangladesh. Thirty actinomycete colonies were isolated in pure culture from five soil samples using Starch-casein-nitrate-agar medium. The isolates were grouped in five color series based on their aerial mycelia color and screened for their a...

Protoplasts were produced from the thermophilic actinomycete Thermomonospora fusca and were regenerated to 0.1% of the direct count on regeneration agar. Recombination after protoplast fusion was demonstrated with drug-resistant mutants of T. fusca YX. A single thiostrepton-resistant colony was isolated after transformation of T. fusca YX with the streptomycete vector pIJ702, providing the firs...