NMR structure of the Aquifex aeolicus tmRNA pseudoknot PK1: new insights into the recoding event of the ribosomal trans-translation.
Nonin-Lecomte, S., Felden, B., Dardel, F.(2006) Nucleic Acids Res 34: 1847-1853
- PubMed: 16595798 
- DOI: https://doi.org/10.1093/nar/gkl111
- Primary Citation of Related Structures:  
2G1W - PubMed Abstract: 
The transfer-messenger RNA (tmRNA) pseudoknot PK1 is essential for bacterial trans-translation, a ribosomal rescue mechanism. We report the solution structure of PK1 from Aquifex aeolicus, which despite an unprecedented small number of nucleotides and thus an unprecented compact size, displays a very high thermal stability. Several unusual structural features account for these properties and indicate that PK1 belongs to the class of ribosomal frameshift pseudoknots. This suggests a similarity between the mechanism of programmed ribosomal frameshifting and trans-translation.
Organizational Affiliation: 
Université Descartes Paris V-Faculté de Pharmacie, Laboratoire de Cristallographie et RMN Biologiques, CNRS UMR 8015, 4, av. de l'Observatoire-75006 Paris, France. sylvie.nonin@univ-paris5.fr