Linked Life Data

15665332

Source:http://linkedlifedata.com/resource/pubmed/id/15665332

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
13
pubmed:dateCreated
2005-3-28
pubmed:abstractText
The small heat shock proteins are ubiquitous stress proteins proposed to increase cellular tolerance to heat shock conditions. We isolated IbpA, the Escherichia coli small heat shock protein, and tested its ability to keep thermally inactivated substrate proteins in a disaggregation competent state. We found that the presence of IbpA alone during substrate thermal inactivation only weakly influences the ability of the bi-chaperone Hsp70-Hsp100 system to disaggregate aggregated substrate. Similar minor effects were observed for IbpB alone, the other E. coli small heat shock protein. However, when both IbpA and IbpB are simultaneously present during substrate inactivation they efficiently stabilize thermally aggregated proteins in a disaggregation competent state. The properties of the aggregated protein substrates are changed in the presence of IbpA and IbpB, resulting in lower hydrophobicity and the ability of aggregates to withstand sizing chromatography conditions. IbpA and IbpB form mixed complexes, and IbpA stimulates association of IbpB with substrate.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
280
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
12292-8
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:15665332-Bacterial Proteins, pubmed-meshheading:15665332-Biochemistry, pubmed-meshheading:15665332-Chromatography, pubmed-meshheading:15665332-Electrophoresis, Polyacrylamide Gel, pubmed-meshheading:15665332-Escherichia coli, pubmed-meshheading:15665332-Escherichia coli Proteins, pubmed-meshheading:15665332-Gene Expression Regulation, Bacterial, pubmed-meshheading:15665332-HSP70 Heat-Shock Proteins, pubmed-meshheading:15665332-Heat-Shock Proteins, pubmed-meshheading:15665332-Hot Temperature, pubmed-meshheading:15665332-Luciferases, pubmed-meshheading:15665332-Molecular Chaperones, pubmed-meshheading:15665332-Protein Binding, pubmed-meshheading:15665332-Protein Folding, pubmed-meshheading:15665332-Protein Structure, Tertiary, pubmed-meshheading:15665332-Sepharose, pubmed-meshheading:15665332-Temperature
pubmed:year
2005
pubmed:articleTitle
The small heat shock protein IbpA of Escherichia coli cooperates with IbpB in stabilization of thermally aggregated proteins in a disaggregation competent state.
pubmed:affiliation
Department of Molecular and Cellular Biology, Intercollegiate Faculty of Biotechnology, University of Gdansk, 80-822 Gdansk, Kladki 24, Poland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't