Linked Life Data

1824237

Source:http://linkedlifedata.com/resource/pubmed/id/1824237

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1992-10-22
pubmed:abstractText
A 2.4 kb fragment containing the midecamycin polyketide synthase genes (mps) was subcloned from the preliminary clone pCN8B12 out of the genomic library of midecamycin-producing strain S. mycarofaciens 1748, by using the homologous DNA of the actinorhodin polyketide synthase gene (act I) as hybridization probe. This DNA fragment was subcloned onto Streptomyces/E. coli shuttle vector pMHM3. A recombinant plasmid pCG2 was obtained. The transformation of the polyketide synthase deficient mutant of actinorhodin-producing strain, S. colicolor TK17, with pCG2 DNA resulted in the production of an antibacterial compound which was similar neither to actinorhodin nor to midecamycin. The transformation of spiramycin-producing strain S. ambofaciens with pCG2 DNA increased spiramycin production in the fermentation broth. The transformation of the regulatory mutant of daunorubicin-producing strain with pCG2 DNA resulted in the production of epsilon-rhodomycinone verified by TLC and HPLC analyses. The pCG2 DNA also could be functionally expressed in tetracenomycin C-producing strain S. glaucescens. However, it could not be expressed in the blocked mutants of erythromycin-producing strain Saccharopolyspora erythrarea WMH 15,261. These suggest that the pCG2 DNA may complement polyketide synthase gene deficiency or have some regulatory function in certain polyketide antibiotic-producing strains.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1042-749X
pubmed:author
pubmed:issnType
Print
pubmed:volume
7
pubmed:geneSymbol
act I, mps
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
241-51
pubmed:dateRevised
2006-5-1
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Subcloning and expression of midecamycin polyketide synthase genes from Streptomyces mycarofaciens 1748.
pubmed:affiliation
Institute of Medicinal Biotechnology, Chinese Academy of Medical Science, Beijing.
pubmed:publicationType
Journal Article