Molecular and General Genetics MGG

, Volume 209, Issue 3, pp 481–488

Cloning and nucleotide sequencing of the genes rimI and rimJ which encode enzymes acetylating ribosomal proteins S18 and S5 of Escherichia coli K12


  • Akikazu Yoshikawa
    • Department of Biology, Faculty of ScienceKobe University
  • Setsuko Isono
    • Department of Biology, Faculty of ScienceKobe University
  • Abraham Sheback
    • Abteilung WittmannMax-Planck-Institut für Molekulare Genetik
  • Katsumi Isono
    • Department of Biology, Faculty of ScienceKobe University

DOI: 10.1007/BF00331153

Cite this article as:
Yoshikawa, A., Isono, S., Sheback, A. et al. Mol Gen Genet (1987) 209: 481. doi:10.1007/BF00331153


The rimI gene of Escherichia coli K12, which encodes an enzyme catalysing acetylation of the N-terminal alanine of ribosomal protein S18, has been cloned into a mini-F plasmid pRE432 and characterized at the molecular level. Similarly, the rimJ gene, which encodes another acetylating enzyme that is specific for ribosomal protein S5, has been cloned and characterized. From the nucleotide sequence data for the two genes the RimI enzyme was deduced to contain 161 amino acid residues with a calculated molecular weight (Mr) of 18232 and the RimJ enzyme contains 194 amino acid residues with a calculated Mr of 22687. The proteins produced from the two genes in maxi-cells were identified by electrophoresis on acrylamide gels and their operon structure was analysed by insertional mutagenesis with transposon γδ (Tn1000) and by measuring the size of their transcripts. Their structural homology was analysed by DNA hybridization and by calculation with computer programs. There is only a low level of overall homology between the two genes except for a 3′ terminal region in which a significant degree of homology was noticed.

Key words

N-terminal acetylationRibosomal proteinsMolecular cloningNucleotide sequencing

Copyright information

© Springer-Verlag 1987