PMID:15710381

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Citation

Croitoru, VV, Bucheli-Witschel, M and Isaksson, LA (2005) In vivo involvement of mutated initiation factor IF1 in gene expression control at the translational level. FEBS Lett. 579:995-1000

Abstract

The influence in vivo of mutated forms of translation initiation factor (IF1) on the expression of the lacZ or 3A' reporter genes, with different initiation and/or +2 codons, has been investigated. Reporter gene expression in these infA(IF1) mutants is similar to the wild-type strain. The results do not support the longstanding hypothesis that IF1 could perform discriminatory functions while blocking the aminoacyl-tRNA acceptor site (A-site) of the ribosome. One cold-sensitive IF1 mutant shows a general overexpression, in particular at low temperatures, of both reporter genes at the protein but not mRNA level.

Links

PubMed Online version:10.1016/j.febslet.2004.12.072

Keywords

Codon/genetics; Escherichia coli/genetics; Escherichia coli/metabolism; Gene Expression Regulation/genetics; Genes, Reporter/genetics; Genetic Variation/genetics; Lac Operon/genetics; Mutation/genetics; Prokaryotic Initiation Factor-1/genetics; Prokaryotic Initiation Factor-1/metabolism; Protein Biosynthesis/genetics; RNA, Messenger/genetics; RNA, Messenger/metabolism; Temperature

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