Linked Life Data

18667568

Source:http://linkedlifedata.com/resource/pubmed/id/18667568

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 8
pubmed:dateCreated
2008-7-31
pubmed:abstractText
The transport of inorganic phosphate (P(i)) is essential for the growth of all organisms. The metabolism of soil-dwelling Streptomyces species, and their ability to produce antibiotics and other secondary metabolites, are strongly influenced by the availability of phosphate. The transcriptional regulation of the SCO4138 and SCO1845 genes of Streptomyces coelicolor was studied. These genes encode the two putative low-affinity P(i) transporters PitH1 and PitH2, respectively. Expression of these genes and that of the high-affinity transport system pstSCAB follows a sequential pattern in response to phosphate deprivation, as shown by coupling their promoters to a luciferase reporter gene. Expression of pitH2, but not that of pap-pitH1 (a bicistronic transcript), is dependent upon the response regulator PhoP. PhoP binds to specific sequences consisting of direct repeats of 11 nt in the promoter of pitH2, but does not bind to the pap-pitH1 promoter, which lacks these direct repeats for PhoP recognition. The transcription start point of the pitH2 promoter was identified by primer extension analyses, and the structure of the regulatory sequences in the PhoP-protected DNA region was established. It consists of four central direct repeats flanked by two other less conserved repeats. A model for PhoP regulation of this promoter is proposed based on the four promoter DNA-PhoP complexes detected by electrophoretic mobility shift assays and footprinting studies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1350-0872
pubmed:author
pubmed:issnType
Print
pubmed:volume
154
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2356-70
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Phosphate-dependent regulation of the low- and high-affinity transport systems in the model actinomycete Streptomyces coelicolor.
pubmed:affiliation
Instituto de Biotecnología de León, INBIOTEC, Parque Científico de León, Avenida Real 1, León, Spain.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't