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Involvement of a 50-kDa mRNP protein from Saccharomyces cerevisiae in mRNA binding to ribosomes.
Triana, L; Ferreras, A C; Cayama, E; Correia, H; Fraile, G; Chakraburtty, K; Herrera, F.
Afiliação
  • Triana L; Centro de Investigaciones Biomédicas (BIOMED), Facultad de Ciencias dela Salud, Universidad de Carabobo, Maracay, Venezuela.
Arch Biochem Biophys ; 344(1): 1-10, 1997 Aug 01.
Article em En | MEDLINE | ID: mdl-9244375
A yeast 50-kDa mRNA-binding protein (50mRNP) is found selectively associated with the 48S and 80S initiation complexes. This protein is structurally related to the translational elongation factor EF-1alpha. The protein reacts with antibodies directed against EF-1alpha and, similarly, EF-1alpha recognizes antibodies against the 50mRNP protein. This is evidence that they share at least one epitope which allows a similar antigenic behavior. In addition, both proteins show similar cleavage patterns upon treatment with the endoproteinase Lys-C. A murine antibody raised against 50mRNP inhibits both 48S and 80S initiation complex formation. The inhibitory effect is relieved by preincubating anti-50mRNP with EF-1alpha. Antibody to EF-1alpha manifests a similar inhibitory pattern for the formation of 48S and 80S complexes. These data strongly suggest that 50mRNP is an EF-1alpha-like polypeptide essential for the formation of the above complexes.
Assuntos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ribonucleoproteínas / Ribossomos / Saccharomyces cerevisiae / RNA Mensageiro / Proteínas de Ligação a RNA Idioma: En Revista: Arch Biochem Biophys Ano de publicação: 1997 Tipo de documento: Article País de afiliação: Venezuela País de publicação: Estados Unidos
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Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ribonucleoproteínas / Ribossomos / Saccharomyces cerevisiae / RNA Mensageiro / Proteínas de Ligação a RNA Idioma: En Revista: Arch Biochem Biophys Ano de publicação: 1997 Tipo de documento: Article País de afiliação: Venezuela País de publicação: Estados Unidos