Download MendeleyA recurrent RNA-binding domain is appended to eukaryotic aminoacyl-tRNA synthetases.
Cahuzac, B., Berthonneau, E., Birlirakis, N., Guittet, E., Mirande, M.(2000) EMBO J 19: 445-452
- PubMed: 10654942
- DOI: https://doi.org/10.1093/emboj/19.3.445
- Primary Citation of Related Structures:
1D2D, 1R1B - PubMed Abstract:
Aminoacyl-tRNA synthetases of higher eukaryotes possess polypeptide extensions in contrast to their prokaryotic counterparts. These extra domains of poorly understood function are believed to be involved in protein-protein or protein-RNA interactions. Here we showed by gel retardation and filter binding experiments that the repeated units that build the linker region of the bifunctional glutamyl-prolyl-tRNA synthetase had a general RNA-binding capacity. The solution structure of one of these repeated motifs was also solved by NMR spectroscopy. One repeat is built around an antiparallel coiled-coil. Strikingly, the conserved lysine and arginine residues form a basic patch on one side of the structure, presenting a suitable docking surface for nucleic acids. Therefore, this repeated motif may represent a novel type of general RNA-binding domain appended to eukaryotic aminoacyl-tRNA synthetases to serve as a cis-acting tRNA-binding cofactor.
Organizational Affiliation:
Laboratoire de RMN, ICSN-CNRS, Gif-sur-Yvette, France.
