Ribosome-messenger recognition in the absence of the Shine-Dalgarno interactions.
FEBS Lett
; 337(2): 189-94, 1994 Jan 10.
Article
em En
| MEDLINE
| ID: mdl-8287975
ABSTRACT
In an attempt to understand how Escherichia coli ribosomes recognize the initiator codon on mRNAs lacking the Shine-Dalgarno (SD) sequence, we have studied 30S initiation complex formation in extension inhibition (toeprinting) experiments using (-SD)mRNAs which are known to be reliably translated in E. coli the plant viral messenger A1MV RNA 4 and two chimaeric mRNAs coding for beta-glucuronidase (GUS) and bearing the 5'-untranslated sequence of TMV RNA (omega) or the omega-derived sequence (CAA)n as 5'-leaders. Ribosomal protein S1 and IF3 have been found to be indispensable for translational initiation. Protein S1 appears to be a key recognition element. S1 binds to sequences within the leaders of (-SD)mRNAs thus providing their affinity to E. coli ribosomes.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Ribossômicas
/
Ribossomos
/
RNA Mensageiro
/
Escherichia coli
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
1994
Tipo de documento:
Article