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PMID: 8510668 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

The yeast gene MSH3 defines a new class of eukaryotic MutS homologues.

Molecular & general genetics : MGG ·Vol. 239 ·No. 1-2 ·1993-05-00 ·Pages 97-108

New L, Liu K, Crouse GF

Abstract

We have identified a gene in Saccharomyces cerevisiae, MSH3, whose predicted protein product shares extensive sequence similarity with bacterial proteins involved in DNA mismatch repair as well as with the predicted protein product of the Rep-3 gene of mouse. MSH3 was obtained by performing a polymerase chain reaction on yeast genomic DNA using degenerate oligonucleotide primers designed to anneal with the most conserved regions of a gene that would be homologous to Rep-3 and Salmonella typhimurium mutS. MSH3 seems to play some role in DNA mismatch repair, inasmuch as its inactivation results in an increase in reversion rates of two different mutations and also causes an increase in postmeiotic segregation. However, the effect of MSH3 disruption on reversion rates and postmeiotic segregation appears to be much less than that of previously characterized yeast DNA mismatch repair genes. Alignment of the MSH3 sequence with all of the known MutS homologues suggests that its primary function may be different from the role of MutS in repair of replication errors. MSH3 appears to be more closely related to the mouse Rep-3 gene and other similar eukaryotic mutS homologues than to the yeast gene MSH2 and other mutS homologues that are involved in replication repair. We suggest that the primary function of MSH3 may be more closely related to one of the other known functions of mutS, such as its role in preventing recombination between non-identical sequences.

Related Genes
MSH3 Rep-3 mutS
MeSH Terms
Adenosine Triphosphatases Amino Acid Sequence Animals Bacterial Proteins/genetics Base Sequence Cloning, Molecular DNA Repair/genetics DNA, Fungal DNA-Binding Proteins Escherichia coli Proteins Fungal Proteins/genetics Genes, Fungal Humans Meiosis Methylation Mitosis/genetics Molecular Sequence Data MutS DNA Mismatch-Binding Protein MutS Homolog 3 Protein Mutation Phenotype Polymerase Chain Reaction Restriction Mapping Saccharomyces cerevisiae/genetics Saccharomyces cerevisiae Proteins Sequence Homology, Amino Acid Sequence Homology, Nucleic Acid
Chemicals
Bacterial Proteins DNA, Fungal DNA-Binding Proteins Escherichia coli Proteins Fungal Proteins MSH3 protein, S cerevisiae MutS Homolog 3 Protein Saccharomyces cerevisiae Proteins Adenosine Triphosphatases MutS DNA Mismatch-Binding Protein MutS protein, E coli
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
New L
Department of Biology, Emory University, Atlanta, Georgia 30322.
Liu K
Crouse G F
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Article Info
Journal
Molecular & general genetics : MGG
Abbr.
Mol Gen Genet
ISSN
0026-8925
DOI
10.1007/BF00281607
Published
1993-05-00
Pages
97-108
Language
English
Region
Germany
NLM ID
0125036
Subset
IM
Grants
NCI NIH HHS · CA54050 · United States
Databases
GENBANK
M96250
External Links
PubMed source DOI: 10.1007/BF00281607
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