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Transcriptional analysis between Streptomyces clavuligerus ATCC 27064 and mutants altered in the antibiotics production

ABSTRACT: The objective is to analyze the differential expression between the wild strain and a ccaR-deleted and oppA2::aph mutants

ORGANISM(S): Streptomyces clavuligerus

PROVIDER: GSE51435 | GEO | 2014/07/01

SECONDARY ACCESSION(S): PRJNA223169

REPOSITORIES: GEO

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Transcriptional analysis between Streptomyces clavuligerus ATCC 27064 and mutants altered in the antibiotics production

Project description:The objective is to analyze the differential expression between the wild strain and a ccaR-deleted and oppA2::aph mutants 6 biological conditions were used, three strains in two times (exponential and stationary growth phase; Streptomyces clavuligerus ATCC 27064, S. clavuligerus M-bM-^HM-^FccaR and S. clavuligerus oppA2::aph). Four biological replicates were made for each condition

2014-07-01 | E-GEOD-51435 | biostudies-arrayexpress

Transcriptional analysis between Streptomyces clavuligerus ATCC 27064 and a mutant altered in antibiotic production

Project description:The objective was to analyze the differential expression between the wild strain and the Streptomyces clavuligerus ΔclaR::aac mutant

2015-08-05 | GSE66683 | GEO

Transcriptional analysis between Streptomyces clavuligerus ATCC 27064 and a mutant altered in antibiotic production

Project description:The objective was to analyze the differential expression between the wild strain and the Streptomyces clavuligerus ΔclaR::aac mutant Six experimental conditions were assayed, two strains (Streptomyces clavuligerus ATCC 27064, S. clavuligerus ΔclaR::aac) in three culture times (22.5h, 46.5h and 60 h). Two biological replicates for each condition.

2015-08-05 | E-GEOD-66683 | biostudies-arrayexpress

Transcriptional analysis between Streptomyces clavuligerus ATCC 27064 and a pSCL4- S. clavuligerus mutant

Project description:The objective is to analyze the differential expression between the wild strain and a pSCL4- S. clavuligerus mutant Experiment type Expression profiling by array

2017-10-25 | GSE92399 | GEO

Streptomyces clavuligerus Transcriptome using adpA deleted and overexpressed mutants

Project description:RNA seq analysis was performed using adpA-deleted and adpA-overexpressed Streptomyces clavuligerus strains to determine its regulatory effect on tunicamycin and other secondary metabolites production

2024-07-01 | GSE243267 | GEO

Teleocidin-producing genotype of Streptomyces clavuligerus ATCC 27064.

Project description:Streptomyces clavuligerus is an industrially important producer of clavulanic acid (CA), a β-lactamase inhibitor which is used together with amoxicillin in one of the most widely prescribed antibacterial medicines, the co-amoxiclav. In a mid-eighties ATCC vial of S. clavuligerus ATCC 27064 culture, we have found a new genotype, which was apparently lost from the subsequent ATCC collection stocks, and has remained obscure to the scientific community. Most importantly, this genotype harbors teleocidin (lyngbyatoxin) biosynthetic genes, which are located on an enigmatic 138 kb chromosomal region and support accumulation of significant amounts of these highly toxic, tumor-promoting secondary metabolites in cultures of S. clavuligerus. While this genomic region is completely absent from all published sequences for S. clavuligerus ATCC strain, at least one of the industrial strains for commercial production of CA, originating from ATCC 27064, retained the genetic potential for production of teleocidins. The origin of teleocidin biosynthetic cluster can now be traced back to early S. clavuligerus stocks at the ATCC. Our work provides a genome sequence and a deposited monoisolate of this genotype. Given the scale of industrial use of S. clavuligerus world-wide and toxicity of teleocidins, we also discuss the environmental and safety implications and provide a method of abolishing teleocidin production without affecting productivity of CA. KEY POINTS: • Early stocks of S. clavuligerus ATCC 27064 produce toxic teleocidins • Teleocidin biosynthetic genes were found within a distinct S. clavuligerus genotype • The genotype has been passed on to some industrial clavulanic acid producer strains.

| S-EPMC8882083 | biostudies-literature

Clavulanic acid production by the MMS 150 mutant obtained from wild type Streptomyces clavuligerus ATCC 27064.

Project description:Clavulanic acid (CA) is a powerful inhibitor of the beta-lactamases, enzymes produced by bacteria resistants to penicillin and cefalosporin. This molecule is produced industrially by strains of Streptomyces clavuligerus in complex media which carbon and nitrogen resources are supplied by inexpensive compounds still providing high productivity. The genetic production improvement using physical and chemical mutagenic agents is an important strategy in programs of industrial production development of bioactive metabolites. However, parental strains are susceptible to loss of their original productivity due genetic instability phenomenona. In this work, some S. clavuligerus mutant strains obtained by treatment with UV light and with MMS are compared with the wild type (Streptomyces clavuligerus ATCC 27064). The results indicated that the random mutations originated some strains with different phenotypes, most divergent demonstrated by the mutants strains named AC116, MMS 150 and MMS 54, that exhibited lack of pigmentation in their mature spores. Also, the strain MMS 150 presented a larger production of CA when cultivated in semi-synthetics media. Using other media, the wild type strain obtained a larger CA production. Besides, using the modifed complex media the MMS 150 strain showed changes in its lipolitic activity and a larger production of CA. The studies also allowed finding the best conditions for a lipase activity exhibited by wild type S. clavuligerus and the MMS150 mutant.

| S-EPMC3958168 | biostudies-literature

Transcriptional analysis between Streptomyces clavuligerus::pIB139 and S. clavuligerus::pimM

Project description:The objective was to analyze the differential expression between the control strain and S. clavuligerus::pimM. Experiment type Expression profiling by array

2019-03-01 | GSE87092 | GEO