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Cited by 201

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The 3′→5′ Exonucleases of DNA Polymerases δ and ɛ and the 5′→3′ Exonuclease Exo1 Have Major Roles in Postreplication Mutation Avoidance in Saccharomyces cerevisiae

Open access
Tran, Hiep T., Gordenin, Dmitry A., Resnick, Michael A.·1999·Molecular and Cellular Biology

Abstract

Replication fidelity is controlled by DNA polymerase proofreading and postreplication mismatch repair. We have genetically characterized the roles of the 5'-->3' Exo1 and the 3'-->5' DNA polymerase exonucleases in mismatch repair in the yeast Saccharomyces cerevisiae by using various genetic backgrounds and highly sensitive mutation detection systems that are based on long and short homonucleotide runs. Genetic interactions were examined among DNA polymerase epsilon (pol2-4) and delta (pol3-01) mutants defective in 3'-->5' proofreading exonuclease, mutants defective in the 5'-->3' exonuclease Exo1, and mismatch repair mutants (msh2, msh3, or msh6). These three exonucleases play an important role in mutation avoidance. Surprisingly, the mutation rate in an exo1 pol3-01 mutant was comparable to that in an msh2 pol3-01 mutant, suggesting that they participate directly in postreplication mismatch repair as well as in other DNA metabolic processes.

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Metadata

Authors
Tran, H. T., Gordenin, D. A., & Resnick, M. A.
Venue
Molecular and Cellular Biology
Published
1999-03-01
Volume
19
Issue
3
Pages
2000-2007
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2126938336
Cited by
201
References
2
FWCI
5.22
Type
journal article
Language
en
Open access
green

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