Solution structure of a GAAG tetraloop in helix 6 of SRP RNA from Pyrococcus furiosus

Kiyoshi Okada, Mari Takahashi, Taiichi Sakamoto, Gota Kawai, Kouji Nakamura, Akio Kanai

Research output: Contribution to journalArticle

4 Citations (Scopus)


The NMR structure of a 12-mer RNA derived from the helix 6 of SRP RNA from Pyrococcus furiosus , whose loop-closing base pair is U:G, was determined, and the structural and thermodynamic properties of the RNA were compared with those of a mutant RNA with the C:G closing base pair. Although the structures of the two RNAs are similar to each other and adopt the GNRR motif, the conformational stabilities are significantly different to each other. It was suggested that weaker stacking interaction of the GAAG loop with the U:G closing base pair in 12-mer RNA causes the lower conformational stability.

Original languageEnglish
Pages (from-to)383-395
Number of pages13
JournalNucleosides, Nucleotides and Nucleic Acids
Issue number4-6
Publication statusPublished - 2006 Jun 1



  • GNRR motif
  • SRP

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Genetics

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