| Detection of heteroduplex DNA molecules among the products of Saccharomyces cerevisiae meiosis. | |
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MedLine Citation:
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PMID: 2217196 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We have used denaturant-gel electrophoresis to provide a physical demonstration of heteroduplex DNA in the products of yeast meiosis. We examined heteroduplex formation at arg4-nsp, a G.C----C.G transversion that displays a moderately high level of postmeiotic segregation. Of the two possible arg4-nsp/ARG4 mismatches (G.G and C.C), only C.C was detected in spores from mismatch repair-competent (Pms1+) diploids. In contrast, C.C and G.G were present at nearly equal levels in spores from Pms1- diploids. These results confirm previous suggestions that postmeiotic segregation spores contain heteroduplex DNA at the site of the marker in question, that C.C is repaired less frequently than is G.G, and that the PMS1 gene product plays a role in mismatch correction. Combined with the observation that Pms1+ ARG4/arg4-nsp diploids produce 3 times more 3+:5m (wildtype:mutant) tetrads (+, +, +/m, m) than 5+:3m tetrads (+, +/m, m, m), these results indicate that, during meiosis, formation of heteroduplex DNA at ARG4 involves preferential transfer of the sense (nontranscribed) strand of the DNA duplex. |
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Authors:
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M Lichten; C Goyon; N P Schultes; D Treco; J W Szostak; J E Haber; A Nicolas |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: Proceedings of the National Academy of Sciences of the United States of America Volume: 87 ISSN: 0027-8424 ISO Abbreviation: Proc. Natl. Acad. Sci. U.S.A. Publication Date: 1990 Oct |
Date Detail:
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Created Date: 1990-11-09 Completed Date: 1990-11-09 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 7653-7 Citation Subset: IM |
Affiliation:
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Laboratory of Biochemistry, National Institutes of Health, Bethesda, MD 20892. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Base Sequence Crosses, Genetic DNA, Fungal / analysis, genetics* Genotype Meiosis Molecular Sequence Data Nucleic Acid Heteroduplexes / analysis, genetics* Nucleic Acid Hybridization Oligonucleotide Probes Plasmids Saccharomyces cerevisiae / cytology, genetics* Spores, Fungal / physiology |
| Grant Support | |
ID/Acronym/Agency:
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GM29736/GM/NIGMS NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/DNA, Fungal; 0/Nucleic Acid Heteroduplexes; 0/Oligonucleotide Probes |
| Comments/Corrections | |
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