Phenotypic suppression and nuclear accommodation of the mit- oxi1-V25 mutation in isolated yeast mitochondria.
Curr Genet
; 12(5): 305-10, 1987.
Article
em En
| MEDLINE
| ID: mdl-3328651
ABSTRACT
Phenotypic suppression by the antibiotic, paromomycin, of the mitochondrial oxi1- -V25 mutation, a mutation which arrests by premature ochre codon the synthesis of the cox II subunit, was studied in isolated yeast mitochondria competent in translation. This antibiotic is known to suppress the mutation in vivo (Dujardin et al. 1984) and allowed in vitro, at concentrations of 20-1100 micrograms per ml. the synthesis of the cox II subunit. This strongly suggests that phenotypic suppression of mit- mutations is due to the direct action of paromomycin on mitochondrial ribosomes. The effect of paromomycin bears a resemblance to the function of the omnipotent nuclear suppressor mutation R705. The nuclear suppression was expressed in isolated mitochondria; suppressor mutation influenced the structure of the mitoribosome. Therefore, it appears that mitoribosomes are indeed the common target in the phenotypical and genetic nuclear suppression of the oxi1-V25 mutation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Ribossômicas
/
Saccharomyces cerevisiae
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Supressão Genética
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Núcleo Celular
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Genes
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Genes Fúngicos
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Mutação
Idioma:
En
Revista:
Curr Genet
Ano de publicação:
1987
Tipo de documento:
Article
País de publicação:
EEUU
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ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA