Linked Life Data

11016837

Source:http://linkedlifedata.com/resource/pubmed/id/11016837

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2000-10-26
pubmed:abstractText
The Saccharomyces cerevisiae gene SGS1 encodes a DNA helicase that shows homology to the Escherichia coli protein RecQ and the products of the BLM and WRN genes in humans, which are defective in Bloom's and Werner's syndrome, respectively. Recently, it has been proposed that this helicase is involved in maintaining the integrity of the rDNA and that loss of Sgs1 function leads to accelerated aging. Sgs1 has been isolated on the basis of its genetic interaction with both topoisomerase I and topoisomerase III, as well as in a two-hybrid screen for proteins that interact with the C-terminal portion of topoisomerase II. We have defined the minimal structural elements of Sgs1 required for its interactions with the three topoisomerases, and demonstrate that the complex phenotypes associated with sgs1 mutants are a consequence of a dysfunctional Sgs1-Top3 complex. We also report that the synthetic relationship between mutations in SGS1 and SRS2, which encodes another helicase implicated in recombinational repair, likewise result from a dysfunctional Sgs1-Top3 interaction. Our findings indicate that Sgs1 may act on different DNA structures depending on the activity of topoisomerase I, Srs2 and topoisomerase III.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0026-8925
pubmed:author
pubmed:issnType
Print
pubmed:volume
264
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
89-97
pubmed:dateRevised
2008-12-25
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Genetic analysis of the Saccharomyces cerevisiae Sgs1 helicase defines an essential function for the Sgs1-Top3 complex in the absence of SRS2 or TOP1.
pubmed:affiliation
Section for Molecular Genetics, Danish Institute of Agricultural Sciences, Tjele.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't