Linked Life Data

11158349

Source:http://linkedlifedata.com/resource/pubmed/id/11158349

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 2
pubmed:dateCreated
2001-2-22
pubmed:databankReference
pubmed:abstractText
The gene encoding BLIP, a beta-lactamase-inhibitory protein, was disrupted in wild-type Streptomyces clavuligerus and in a clavulanic acid non-producing mutant. The resulting BLIP mutant and BLIP/clavulanic acid double mutant showed no residual proteinaceous beta-lactamase-inhibitory activity, indicating that only a single beta-lactamase-inhibitory protein exists in S. clavuligerus. The lack of any proteinaceous beta-lactamase-inhibitory activity in the bli and bli/claR mutants also indicates that BLP, the BLIP-like protein, encoded by S. clavuligerus does not possess beta-lactamase-inhibitory activity despite its similarity to BLIP. The bli mutant and the bli/claR double mutant did not show any aberrant growth morphology, sporulation defects, or alterations in cephamycin C production or penicillin G resistance when compared to wild-type S. clavuligerus or to the claR single mutant. Mutants bearing the bli gene disruption did show an elevated level of production of clavam-2-carboxylate and hydroxymethyl clavam as well as clavulanic acid. This phenomenon was observed in the middle stages of production of these clavams but was not detected during maximum production. The production of BLIP was also determined to be down-regulated in a ccaR mutant, lacking the pathway-specific transcriptional regulator required for production of cephamycin C and clavulanic acid. Sequencing of the regions flanking the bli gene showed the presence of a partial open reading frame that encodes a DNA-binding protein, and several open reading frames apparently involved in the production of an ABC transporter.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1350-0872
pubmed:author
pubmed:issnType
Print
pubmed:volume
147
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
325-35
pubmed:dateRevised
2004-1-14
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Construction and analysis of ss-lactamase-inhibitory protein (BLIP) non-producer mutants of Streptomyces clavuligerus.
pubmed:affiliation
Department of Biological Sciences, CW-405 Biological Sciences Building, University of Alberta, Edmonton, Alberta, CanadaT6G 2E9.
pubmed:publicationType
Journal Article