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. 1986 May;6(5):1497–1507. doi: 10.1128/mcb.6.5.1497

RAD7 gene of Saccharomyces cerevisiae: transcripts, nucleotide sequence analysis, and functional relationship between the RAD7 and RAD23 gene products.

G Perozzi, S Prakash
PMCID: PMC367675  PMID: 3023893

Abstract

The RAD7 gene of Saccharomyces cerevisiae was cloned on a 4.0-kilobase (kb) DNA fragment and shown to provide full complementation of a rad7-delta mutant strain. The nucleotide sequence of a 2.2-kb DNA fragment which contains the complete RAD7 gene was determined. Transcription of the RAD7 gene initiates at multiple sites in a region spanning positions -61 to -8 of the DNA sequence. The 1.8-kb RAD7 mRNA encodes a protein of 565 amino acids with a predicted size of 63.7 kilodaltons. The hydropathy profile of the RAD7 protein indicates a highly hydrophilic amino terminus and a very hydrophobic region toward the carboxyl terminus. A RAD7 subclone deleted for the first 99 codons complements the rad7-delta mutation, but not the rad7-delta rad23-delta double mutation, indicating that the RAD23 protein can compensate for the function that is missing in the amino-terminally deleted RAD7 protein. The RAD7 and RAD23 genes in multicopy plasmids do not complement the rad23-delta and rad7-delta mutations, respectively. These observations could mean that although the two proteins might share a common functional domain, they must also perform distinct functions. Alternatively, an interaction between the RAD7 and RAD23 proteins could also account for these observations.

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Selected References

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