Yeast ribosomal protein S3 possesses a β-lyase activity on damaged DNA

Ki Moon Seong, Sang Oun Jung, Hag Dong Kim, Hee Ju Kim, You Jin Jung, Soo Young Choi, Joon Kim

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


Yeast ribosomal protein S3 has multifunctional activities that are involved in both protein translation and DNA repair. Here, we report that yeast Rps3p cleaves variously damaged DNA that contains not only AP sites and pyrimidine dimers but also 7,8-hydro-8-oxoguanine. This study also revealed that Rps3p has a β-lyase activity with a broad range of substrate specificity which cleaves phosphodiester bonds of UV or oxidatively damaged DNA substrates. Mutation analysis of the yeast Rps3 protein including introduction of domain deletions and residue replacements identified the residues Asp154 and Lys200 are important for the catalytic activity. In addition, the repair enzyme activity of yeast Rps3p was confirmed by complementation in xth, nfo Escherichia coli cells in which the DNA repair process is defective.

Original languageEnglish
Pages (from-to)356-361
Number of pages6
JournalFEBS Letters
Issue number4
Publication statusPublished - 2012 Feb 17


  • 8-Oxo-G
  • AP sites
  • DNA repair
  • Lyase
  • Pyrimidine dimer
  • Yeast Rps3p

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology


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