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Escherichia coli mRNAs with strong Shine/Dalgarno sequences also contain 5' end sequences complementary to domain # 17 on the 16S ribosomal RNA.

Abstract：

:A well-established feature of the translation initiation region, which attracts the ribosomes to the prokaryotic mRNAs, is a purine rich area called Shine/Dalgarno sequence (SD). There are examples of various other sequences, which despite having no similarity to an SD sequence are capable of enhancing and/or initiating translation. The mechanisms by which these sequences affect translation remain unclear, but a base pairing between mRNA and 16S ribosomal RNA (rRNA) is proposed to be the likely mechanism. In this study, using a computational approach, we identified a non-SD signal found specifically in the translation initiation regions of Escherichia coli mRNAs, which contain super strong SD sequences. Nine of the 11 E. coli translation initiation regions, which were previously identified for having super strong SD sequences, also contained six or more nucleotides complementary to box-17 on the 16S rRNA (nucleotides 418-554). Mutational analyses of those initiation sequences indicated that when complementarity to box-17 was eliminated, the efficiency of the examined sequences to mediate the translation of chloramphenicol acetyltransferase (CAT) mRNA was reduced. The results suggest that mRNA sequences with complementarity to box-17 of 16S rRNA may function as enhancers for translation in E. coli.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Golshani A,Krogan NJ,Xu J,Pacal M,Yang XC,Ivanov I,Providenti MA,Ganoza MC,Ivanov IG,AbouHaidar MG

doi

10.1016/j.bbrc.2004.02.169

subject

Has Abstract

pub_date

2004-04-16 00:00:00

pages

978-83

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006291X04004577

journal_volume

316

pub_type

杂志文章

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