First identification of an amber nonsense mutation in Schizosaccharomyces pombe

major differences in the efficiency of homologous versus heterologous yeast suppressor tRNA genes

Guido Krupp, Pierre Thuriaux, Ian M. Willis, Vera Gamulin, Dieter Söll

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In Saccharomyces cerevisiae ochre and opal, as well as amber mutations are known, whereas in the fission yeast Schizosaccharomyces pombe no amber alleles have been described. We have characterized trp1-566, an amber allele in the trp1 locus of S. pombe. The identification of trp1-566 as an amber allele is based on the following results: (a) The nonsense allele can be converted to an ochre allele by nitrosoguanidine mutagenesis. (b) trp1-566 is suppressed by a bona fide S. pombe amber suppressor tRNA, supSI. The supSI gene was obtained by primer-directed in vitro mutagenesis of a tRNASer from S. pombe. Unexpectedly, an S. cerevisiae amber suppressor tRNASer, supR21, transformed into S. pombe, failed to suppress trp1-566. Northern analysis of S. pombe transformants, containing supRL1 or S. cerevisiae tRNALeu or tRNATyr genes reveals that these genes are not transcribed in the fission yeast. As an additional tool for the analysis of nonsense mutations in S. pombe, we obtained by nitrosoguanidine mutagenesis two unlinked amber suppressor alleles, sup13 and sup14, which act on trp1-566.

Original languageEnglish (US)
Pages (from-to)82-87
Number of pages6
JournalMGG Molecular & General Genetics
Volume201
Issue number1
DOIs
StatePublished - Sep 1985
Externally publishedYes

Fingerprint

Suppressor Genes
Schizosaccharomyces
Nonsense Codon
Transfer RNA
Yeasts
Alleles
Amber
RNA, Transfer, Ser
Mutagenesis
Nitrosoguanidines
Saccharomyces cerevisiae
RNA, Transfer, Tyr
RNA, Transfer, Leu
Genes

ASJC Scopus subject areas

  • Genetics

Cite this

First identification of an amber nonsense mutation in Schizosaccharomyces pombe : major differences in the efficiency of homologous versus heterologous yeast suppressor tRNA genes. / Krupp, Guido; Thuriaux, Pierre; Willis, Ian M.; Gamulin, Vera; Söll, Dieter.

In: MGG Molecular & General Genetics, Vol. 201, No. 1, 09.1985, p. 82-87.

Research output: Contribution to journalArticle

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