Properties of small rRNA methyltransferase RsmD: Mutational and kinetic study

Olga V. Sergeeva, Irina V. Prokhorova, Yerdos Ordabaev, Philipp O. Tsvetkov, Petr V. Sergiev, Alexey A. Bogdanov, Alexander A. Makarov, Olga A. Dontsova

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Ribosomal RNA modification is accomplished by a variety of enzymes acting on all stages of ribosome assembly. Among rRNA methyltransferases of Escherichia coli, RsmD deserves special attention. Despite its minimalistic domain architecture, it is able to recognize a single target nucleotide G966 of the 16S rRNA. RsmD acts late in the assembly process and is able to modify a completely assembled 30S subunit. Here, we show that it possesses superior binding properties toward the unmodified 30S subunit but is unable to bind a 30S subunit modified at G966. RsmD is unusual in its ability to withstand multiple amino acid substitutions of the active site. Such efficiency of RsmD may be useful to complete the modification of a 30S subunit ahead of the 30S subunit's involvement in translation. Published by Cold Spring Harbor Laboratory Press.

Original languageEnglish
Pages (from-to)1178-1185
Number of pages8
JournalRNA
Volume18
Issue number6
DOIs
Publication statusPublished - Jun 2012
Externally publishedYes

Keywords

  • Methylation
  • Modification
  • N2-methyl guanosine
  • rRNA
  • RsmD

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