Linked Life Data

10893220

Source:http://linkedlifedata.com/resource/pubmed/id/10893220

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
39
pubmed:dateCreated
2000-10-27
pubmed:abstractText
Expression of the amidase operon of Pseudomonas aeruginosa is controlled by AmiC, the ligand sensor and negative regulator, and AmiR the transcription antitermination factor activator. We have titrated out AmiC repression activity in vivo by increased AmiR production in trans and shown AmiC regulation of the antitermination activity of AmiR by a steric hindrance mechanism. In the presence of the co-repressor butyramide we have isolated a stable AmiC.AmiR complex. Addition of the inducing ligand acetamide to the complex trips the molecular switch, causing complex dissociation and release of AmiR. The AmiC.AmiR butyramide complex exhibits acetamide-dependent, sequence-specific RNA binding activity and a K(d) of 1.0 nm has been calculated for the AmiR.RNA interaction. The results show that amidase operon expression is controlled by a novel type of signal transduction system in which activity of a site-specific RNA binding activator is regulated via a sequestration mechanism.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
29
pubmed:volume
275
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
30660-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:10893220-Acetamides, pubmed-meshheading:10893220-Amides, pubmed-meshheading:10893220-Amidohydrolases, pubmed-meshheading:10893220-Bacterial Proteins, pubmed-meshheading:10893220-Binding Sites, pubmed-meshheading:10893220-Gene Expression Regulation, Bacterial, pubmed-meshheading:10893220-Gene Expression Regulation, Enzymologic, pubmed-meshheading:10893220-Molecular Conformation, pubmed-meshheading:10893220-Nucleic Acid Conformation, pubmed-meshheading:10893220-Operon, pubmed-meshheading:10893220-Peptide Chain Initiation, Translational, pubmed-meshheading:10893220-Periplasmic Binding Proteins, pubmed-meshheading:10893220-Protein Binding, pubmed-meshheading:10893220-Pseudomonas aeruginosa, pubmed-meshheading:10893220-Recombinant Proteins, pubmed-meshheading:10893220-Signal Transduction
pubmed:year
2000
pubmed:articleTitle
Steric hindrance regulation of the Pseudomonas aeruginosa amidase operon.
pubmed:affiliation
Department of Biochemistry and Molecular Biology, University College London, Gower St., London WC1E 6BT, United Kingdom. R.Norman@icrf.icnet.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't