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Title: Pat1: A topoisomerase II-associated protein required for faithful chromosome transmission in Saccharomyces cerevisiae
Authors: Wang, X. Q.
Watt, P. M.
Louis, E. J.
Borts, R. H.
Hickson, I. D.
First Published: 1-Dec-1996
Publisher: Oxford University Press
Citation: Nucleic Acids Research, 1996, 24 (23), pp. 4791-4797
Abstract: Saccharomyces cerevisiae top2 mutants deficient in topoisomerase II activity are defective in chromosome segregation during both mitotic and meiotic cell divisions. To identify proteins that act in concert with topoisomerase II during chromosome segregation in S.cerevisiae, we have used a two-hybrid cloning approach. We report the isolation of the PAT1 gene (for protein associated with topoisomerase II), which encodes a novel 90 kDa proline- and glutamine-rich protein that interacts with a highly conserved, leucine-rich region of topoisomerase II in vivo. Strains lacking Pat1p exhibit a slow growth rate and a phenotype reminiscent of conditional top2 mutants grown at the semi-permissive temperature; most notably, a reduced fidelity of chromosome segregation during both mitosis and meiosis. These findings indicate that the PAT1 gene is necessary for accurate chromosome transmission during cell division in eukaryotic cells and suggest that the interaction of Pat1p and topoisomerase II is an important component of this function.
DOI Link: 10.1093/nar/24.23.4791
ISSN: 0305-1048
Type: Journal Article
Rights: Copyright © 1996 Oxford University Press
Appears in Collections:Published Articles, Dept. of Genetics

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