title: The fission yeast rad22 gene, having a function in mating-type switching and repair of DNA damages, encodes a protein homolog to Rad52 of Saccharomyces cerevisiae.
abstract: The gene rad22 of the fission yeast Schizosaccharomyces pombe has a function in DNA repair and mating-type switching. We have cloned the rad22 gene from a genomic gene bank by functional complementation of the switching defect. An open reading frame coding for a putative protein of 469 amino acids was found by sequence analyses. The rad22 gene contains no intron. A region of 126 amino acids in the N-terminal half of the Rad22 protein has significant homologies (56% identity and 36% similarity) to the Rad52 protein of Saccharomyces cerevisiae. A rad22 disruption strain was constructed which seems to be inviable in a homothallic background. Southern blot analyses have shown that the rad22-67 mutant frequently gives rise to deletions in the mating-type region. These data indicate that the Rad22 protein has a function in the repair of DNA double-strand breaks.
authors.affiliation: Institut für Genetik, Biozentrum, Technische Universität Braunschweig, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Ostermann
authors.forename: A
authors.initials: A
authors.lastname: Lorentz
authors.forename: H
authors.initials: H
authors.lastname: Schmidt
mesh_terms: D000595:Amino Acid Sequence; D015139:Blotting, Southern; D003001:Cloning, Molecular; D004249:DNA Damage; D004260:DNA Repair / Q000235:genetics*; D004271:DNA, Fungal / Q000235:genetics; D004268:DNA-Binding Proteins / Q000235:genetics*; D005656:Fungal Proteins / Q000235:genetics*; D005800:Genes, Fungal; D049770:Genes, Mating Type, Fungal; D005812:Genes, Switch; D008969:Molecular Sequence Data; D051721:Rad52 DNA Repair and Recombination Protein; D015183:Restriction Mapping; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins; D012568:Schizosaccharomyces / Q000235:genetics*; D029702:Schizosaccharomyces pombe Proteins; D017386:Sequence Homology, Amino Acid
chemical_list: D004271:DNA, Fungal; D004268:DNA-Binding Proteins; D005656:Fungal Proteins; C497197:RAD52 protein, S cerevisiae; D051721:Rad52 DNA Repair and Recombination Protein; D029701:Saccharomyces cerevisiae Proteins; D029702:Schizosaccharomyces pombe Proteins; C085412:rad52 protein, S pombe