Cycloheximide resistance in yeast: the gene and its protein
- PMID: 6304624
- PMCID: PMC325953
- DOI: 10.1093/nar/11.10.3123
Cycloheximide resistance in yeast: the gene and its protein
Abstract
Mutations in the yeast gene CYH2 can lead to resistance to cycloheximide, an inhibitor of eukaryotic protein synthesis. The gene product of CYH2 is ribosomal protein L29, a component of the 60S ribosomal subunit. We have cloned the wild-type and resistance alleles of CYH2 and determined their nucleotide sequence. Transcription of CYH2 appears to initiate and terminate at multiple sites, as judged by S1 nuclease analysis. The gene is transcribed into an RNA molecule of about 1082 nucleotides, containing an intervening sequence of 510 nucleotides. The splice junction of the intron resides within a codon near the 5' end of the gene. In confirmation of peptide analysis by Stocklein et al. (1) we find that resistance to cycloheximide is due to a transversion mutation resulting in the replacement of a glutamine by glutamic acid in position 37 of L29.
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