Novel essential gene involved in 16S rRNA processing in escherichia coli

Tatsuaki Kurata, Shinobu Nakanishi, Masayuki Hashimoto, Masato Taoka, Yukiko Yamazaki, Toshiaki Isobe, Jun Ichi Kato

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


Biogenesis of ribosomes is a complex process mediated by many factors. While its transcription proceeds, ribosomal RNA (rRNA) folds itself into a characteristic three-dimensional structure through interaction with ribosomal proteins, during which its ends are processed. Here, we show that the essential protein YqgF, a RuvC family protein with an RNase-H-like motif, is involved in the processing of pre-16S rRNA during ribosome maturation. Indeed, pre-16S rRNA accumulated in cells of a temperature-sensitive yqgF mutant (yqgFts) cultured at a non-permissive temperature. In addition, purified YqgF was shown to process the 5′ end of pre-16S rRNA within 70S ribosomes in vitro. Mass spectrometry analysis of the total proteins in the yqgFts mutant cells showed that the expression of genes containing multiple Shine-Dalgarno-like sequences was observed to be lower than in wild type. These results are interpreted to indicate that YqgF is involved in a novel enzymic activity necessary for the processing of pre-16S rRNA, thereby affecting elongation of translation.

Original languageEnglish
Pages (from-to)955-965
Number of pages11
JournalJournal of Molecular Biology
Issue number4
Publication statusPublished - 2015 Feb 27

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Molecular Biology


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