Linked Life Data

8590411

Source:http://linkedlifedata.com/resource/pubmed/id/8590411

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4-5
pubmed:dateCreated
1996-3-25
pubmed:abstractText
Cultures of Streptomyces coelicolor A3(2) produced actinorhodin in defined media with various carbon and nitrogen sources. Production occurred during biomass accumulation if assimilation of either the carbon or the nitrogen source limited the rate of growth. High growth rates tended to delay product synthesis until after biomass accumulation was complete, but fully biphasic fermentation profiles were achieved only with media supporting very rapid growth. The onset of actinorhodin production then coincided with a decline in the growth rate during transition of carbon-sufficient cultures to stationary phase. In cultures with maltose as a growth-limiting carbon source, depletion of phosphate increased the rate of actinorhodin biosynthesis, but did not alter the timing of its initiation. With defined media, the use of spores rather than vegetative mycelium as inocula reduced the overlap between trophophase and idiophase. The general guidelines for achieving biphasic production of actinorhodin in S. coelicolor A3(2) cultures could be used to obtain trophophase-idiophase separation in cultures of Streptomyces venezuelae producing chloramphenicol. However, the conditions needed to be modified to give optimized biphasic fermentations with individual strains. Under conditions favouring chloramphenicol production in a distinct idiophase, aromatic amine secondary metabolites in the same cultures of S. venezuelae were produced in a pattern that overlapped the trophophase, suggesting that conditions need to be tailored also to meet differences in the regulation of secondary metabolites.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0008-4166
pubmed:author
pubmed:issnType
Print
pubmed:volume
41
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
309-15
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Physiological control of trophophase-idiophase separation in streptomycete cultures producing secondary metabolites.
pubmed:affiliation
Biology Department, Dalhousie University, Halifax, NS, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't