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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Aep3p-dependent translation of yeast mitochondrial ATP8

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Autor(es):
Barros, Mario H. ; Tzagoloff, Alexander
Número total de Autores: 2
Tipo de documento: Artigo Científico
Fonte: MOLECULAR BIOLOGY OF THE CELL; v. 28, n. 11, p. 1426-1434, JUN 1 2017.
Citações Web of Science: 4
Resumo

Translation of mitochondrial gene products in Saccharomyces cerevisiae depends on mRNA-specific activators that bind to the 5' untranslated regions and promote translation on mitochondrial ribosomes. Here we find that Aep3p, previously shown to stabilize the bicistronic ATP8-ATP6 mRNA and facilitate initiation of translation from unformylated methionine, also activates specifically translation of ATP8. This is supported by several lines of evidence. Temperature-sensitive aep3 mutants are selectively blocked in incorporating {[}S-35] methionine into Atp8p at nonpermissive but not at the permissive temperature. This phenotype is not a consequence of defective transcription or processing of the pre-mRNA. Neither is it explained by turnover of Aep3p, as evidenced by the failure of aep3 mutants to express a recoded ARG8(m) when this normally nuclear gene is substituted for ATP8 in mitochondrial DNA. Finally, translational of ATP8 mRNA in aep3 mutants is partially rescued by recoded allotopic ATP8 (nATP8) in a high-expression plasmid or in a CEN plasmid in the presence of recessive mutations in genes involved in stability and polyadenylation of RNA. (AU)

Processo FAPESP: 13/09482-8 - Saccharomyces cerevisiae como modelo de estudo da tradução mitocondrial
Beneficiário:Mario Henrique de Barros
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 13/07937-8 - Redoxoma
Beneficiário:Ohara Augusto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs