Linked Life Data

1367126

Source:http://linkedlifedata.com/resource/pubmed/id/1367126

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1991-6-14
pubmed:abstractText
There are now several examples showing that hybrid secondary metabolites can be produced as a result of interspecies cloning of antibiotic biosynthesis genes in streptomycetes. This paper reviews examples of hybrid secondary metabolite production, and examines the underlying biochemical and regulatory principles leading to the formation of hybrid anthraquinones by recombinant anthracycline-producing streptomycetes carrying actinorhodin biosynthesis genes. An anthraquinone, aloesaponarin II, was produced by cloning the actI, actIII, actIV, and actVII genes (pANT12) of actinorhodin biosynthesis pathway from Streptomyces coelicolor in anthracycline producing streptomycetes. Streptomyces galilaeus strains 31 133 and 31 671, aclacinomycin and 2-hydroxyaklavinone producers, respectively, formed aloesaponarin II as their major polyketide product when transformed with pANT12. Subcloning experiments indicated that a 2.8-kb XhoI fragment containing only the actI and actVII loci was necessary for aloesaponarin II biosynthesis by S. galilaeus 31 133. When S. galilaeus 31 671 was transformed with the actI, actVII, and actIV genes, however, the recombinant strain produced two novel anthraquinones, desoxyerythrolaccin and 1-O-methyldesoxyerythrolaccin. When S. galilaeus 31 671 was transformed with only the intact actIII gene (pANT45), aklavinone was formed exclusively. These experiments indicate a function for the actIII gene, which is the reduction of the keto group at C-9 from the carboxyl terminus of the assembled polyketide to the corresponding secondary alcohol. The effects of three regulatory loci, dauG, dnrR1, and asaA, on the production of natural and hybrid polyketides were also shown.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
B
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0169-4146
pubmed:author
pubmed:issnType
Print
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
163-74
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Expression of polyketide biosynthesis and regulatory genes in heterologous streptomycetes.
pubmed:affiliation
Department of Microbiology, Ohio State University, Columbus 43210.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Review