title: Conditional hyporecombination mutants of three REC genes of Saccharomyces cerevisiae.
abstract: We have isolated and characterized three conditional hyporecombination mutants, rec1-1, rec3-1 and rec4-1, that define three REC genes of Saccharomyces cerevisiae required for spontaneous general mitotic interchromosomal recombination. Each MATa/MAT alpha rec/rec diploid is deficient in mitotic single site gene conversion, intragenic recombination, intergenic recombination and sporulation at the restrictive temperature (36 degrees C). The rec1-1 mutation also confers conditional enhanced sensitivity to the killing effects of X-rays. The rec1-1 and rec3-1 mutations have been mapped to chromosome VII. The rec1-1, rec3-1 and rec4-1 mutations exhibit complementation at 36 degrees C for both mitotic recombination and sporulation.
authors.affiliation: Cell and Molecular Biology Division, Lawrence Berkeley Laboratory, University of California, Berkeley 94720.
authors.forename: M S
authors.initials: MS
authors.lastname: Esposito
authors.forename: J T
authors.initials: JT
authors.lastname: Brown
mesh_terms: D002874:Chromosome Mapping; D015825:Chromosomes, Fungal; D004171:Diploidy; D005785:Gene Conversion; D005800:Genes, Fungal; D005816:Genetic Complementation Test; D009154:Mutation; D010641:Phenotype; D011995:Recombination, Genetic; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000502:physiology; D013172:Spores, Fungal; D013696:Temperature