Identification of a role for actin in translational fidelity in yeast

K. Kandl, R. Munshi, P. Ortiz, G. Andersen, T. Kinzy, Alison Adams

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Numerous studies have suggested a role for actin in translation, but the molecular details of this role are unknown. To elucidate the function(s) of actin in translation, we have studied 25 isogenic, conditional yeast actin mutants. Strikingly, analysis of these mutants indicates that none of those tested have conditional growth defects caused by reduced rates of protein synthesis; and analysis of latrunculin A-treated wild-type cells indicates that even complete disruption of the actin cytoskeleton has no significant effect on the rate of translation. However, analysis of the effect of the 25 actin mutations on fidelity and sensitivity to translation inhibitors identified two mutations (act1-2 and act1-122) that cause a significant reduction in the fidelity of translation, as assayed by nonsense suppression, and several mutants that are sensitive to paromomycin, which affects translational fidelity. Translation elongation factor 1A (eEF1A) also has a role in fidelity, and in the presence of excess eEF1A four of the mutants (act1-2, act1-20, act1-120, and act1-125) are even more sensitive to paromomycin, while one mutant (act1-122) becomes less sensitive. Together, these findings suggest that actin may not be important for the rate of translation, but may have a critical role in ensuring translational fidelity.

Original languageEnglish (US)
Pages (from-to)10-18
Number of pages9
JournalMolecular Genetics and Genomics
Volume268
Issue number1
DOIs
StatePublished - 2002
Externally publishedYes

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Actins
Yeasts
Paromomycin
Peptide Elongation Factors
Mutation
Actin Cytoskeleton
Growth
Proteins

Keywords

  • Actin cytoskeleton
  • Nonsense suppression
  • Translation

ASJC Scopus subject areas

  • Genetics

Cite this

Identification of a role for actin in translational fidelity in yeast. / Kandl, K.; Munshi, R.; Ortiz, P.; Andersen, G.; Kinzy, T.; Adams, Alison.

In: Molecular Genetics and Genomics, Vol. 268, No. 1, 2002, p. 10-18.

Research output: Contribution to journalArticle

Kandl, K. ; Munshi, R. ; Ortiz, P. ; Andersen, G. ; Kinzy, T. ; Adams, Alison. / Identification of a role for actin in translational fidelity in yeast. In: Molecular Genetics and Genomics. 2002 ; Vol. 268, No. 1. pp. 10-18.
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