Identification of RAD16, a yeast excision repair gene homologous to the recombinational repair gene RAD54 and to the SNF2 gene involved in transcriptional activation.
The RAD54 gene of Saccharomyces cerevisiae is involved in the recombinational repair of DNA damage. The predicted amino acid sequence of the RAD54 protein shows significant homologies with the yeast SNF2 protein, which is required for the transcriptional activation of a number of diversely regulated genes. These proteins are 31% identical in a 492-amino acid region that includes presumed nucleotide and Mg2+ binding sites. We noted previously that the SNF2 protein also shares homology with a partial open reading frame (ORF) that was reported with the sequence of an adjacent gene. This ORF also shares homology with the RAD54 protein. To test whether this ORF is involved in transcriptional activation or DNA repair, yeast strains deleted for part of it have been isolated. These strains do not show a Snf-like phenotype, but they are UV sensitive. This gene has been identified as RAD16, a gene involved in the excision repair of DNA damage. Analysis of the rad16 deletion mutations indicates that RAD16 encodes a non-essential function and is not absolutely required for excision repair. Outside the region of homology to RAD54 and SNF2, the predicted RAD16 protein contains a novel cysteine-rich motif that may bind zinc and that has been found recently in eleven other proteins, including the yeast RAD18 protein. The homologies between RAD16, RAD54 and SNF2 are also shared by several additional, recently isolated yeast and Drosophila genes.
Schild
D
D
Division of Cell and Molecular Biology, Lawrence Berkeley Laboratory, Berkeley, CA 94720.
Glassner
B J
BJ
Mortimer
R K
RK
Carlson
M
M
Laurent
B C
BC
D000251:Adenosine Triphosphatases; D000595:Amino Acid Sequence; D004265:DNA Helicases; D004260:DNA Repair / Q000235:genetics* / Q000528:radiation effects; D045643:DNA Repair Enzymes; D004268:DNA-Binding Proteins / Q000235:genetics; D005656:Fungal Proteins / Q000235:genetics; D005800:Genes, Fungal; D008969:Molecular Sequence Data; D009687:Nuclear Proteins; D011995:Recombination, Genetic; D015183:Restriction Mapping; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000528:radiation effects; D029701:Saccharomyces cerevisiae Proteins; D012689:Sequence Homology, Nucleic Acid; D014157:Transcription Factors / Q000235:genetics; D014158:Transcription, Genetic; D014466:Ultraviolet Rays; D016335:Zinc Fingers / Q000235:genetics
D004268:DNA-Binding Proteins; D005656:Fungal Proteins; D009687:Nuclear Proteins; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; D000251:Adenosine Triphosphatases; C075468:RAD54 protein, S cerevisiae; C499333:SNF2 protein, S cerevisiae; C075467:RAD16 protein, S cerevisiae; D004265:DNA Helicases; D045643:DNA Repair Enzymes