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Mol Cell Biol. 1990 July; 10(7): 3750-3760

Cloning and analysis of a gene involved in DNA repair and recombination, the rad1 gene of Schizosaccharomyces pombe.

P Sunnerhagen, B L Seaton, A Nasim and S Subramani

Department of Biology B-022, University of California, San Diego, La Jolla 92093.

ABSTRACT

We have cloned the rad1 gene of Schizosaccharomyces pombe by complementation of the rad1-1 mutant, which is deficient in DNA repair and recombination. The coding region of the gene is 582 base pairs long and contains no introns. The predicted product is a strongly acidic, 22-kilodalton protein containing 194 amino acid residues. This gene does not exhibit significant homology to any other known repair gene. The major transcription start site is at 27 base pairs upstream of the putative start codon. Insertion mutagenesis revealed that besides the coding region, at least 151 base pairs of 5'-flanking sequence are required for full complementing activity. A strain carrying a null allele of rad1 was constructed and found to have a phenotype closely similar to that of the rad1-1 mutant. Expression in Escherichia coli of the coding region yielded a protein product of a size close to that predicted from the DNA sequence. This product reacted with antibodies raised against a synthetic peptide with a sequence from that predicted for the protein product. We have localized the rad1 gene to NotI fragment E of the S. pombe genome.

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Mol Cell Biol. 1990 July; 10(7): 3750-3760

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