Mutation at position 791 in Escherichia coli 16S ribosomal RNA affects processes involved in the initiation of protein synthesis

W. E. Tapprich, D. J. Goss, A. E. Dahlberg

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

Abstract

A single base was mutated from guanine to adenine at position 791 in 16S rRNA in the Escherichia coli rrnB operon on the multicopy plasmid pKK3535. The plasmid-coded rRNA was processed and assembled into 30S ribosomal subunits in E. coli and caused a retardation of cell growth. The mutation affected crucial functional roles of the 30S subunit in the initiation of protein synthesis. The affinity of the mutant 30S subunits for 50S subunits was reduced and the association equilibrium constant for initiation factor 3 was decreased by a factor of 10 compared to wild-type 30S subunits. The interrelationship among the region of residue 790 in 16S rRNA, subunit association, and initiation factor 3 binding during initiation complex formation, as revealed by this study, offers insights into the functional role of rRNA in protein synthesis.

Original languageEnglish (US)
Pages (from-to)4927-4931
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Volume86
Issue number13
DOIs
StatePublished - 1989

ASJC Scopus subject areas

  • General

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