Download MendeleyStructural basis for nucleotide exchange and competition with tRNA in the yeast elongation factor complex eEF1A:eEF1Balpha.
Andersen, G.R., Pedersen, L., Valente, L., Chatterjee, I., Kinzy, T.G., Kjeldgaard, M., Nyborg, J.(2000) Mol Cell 6: 1261-1266
- PubMed: 11106763
- DOI: https://doi.org/10.1016/s1097-2765(00)00122-2
- Primary Citation of Related Structures:
1F60 - PubMed Abstract:
The crystal structure of a complex between the protein biosynthesis elongation factor eEF1A (formerly EF-1alpha) and the catalytic C terminus of its exchange factor, eEF1Balpha (formerly EF-1beta), was determined to 1.67 A resolution. One end of the nucleotide exchange factor is buried between the switch 1 and 2 regions of eEF1A and destroys the binding site for the Mg(2+) ion associated with the nucleotide. The second end of eEF1Balpha interacts with domain 2 of eEF1A in the region hypothesized to be involved in the binding of the CCA-aminoacyl end of the tRNA. The competition between eEF1Balpha and aminoacylated tRNA may be a central element in channeling the reactants in eukaryotic protein synthesis. The recognition of eEF1A by eEF1Balpha is very different from that observed in the prokaryotic EF-Tu:EF-Ts complex. Recognition of the switch 2 region in nucleotide exchange is, however, common to the elongation factor complexes and those of Ras:Sos and Arf1:Sec7.
Organizational Affiliation:
Institute of Molecular and Structural Biology University of Aarhus Gustav Wieds Vej 10C DK8000, Arhus, Denmark.
