The crystal structure of human eukaryotic release factor eRF1--mechanism of stop codon recognition and peptidyl-tRNA hydrolysis.Song, H., Mugnier, P., Das, A.K., Webb, H.M., Evans, D.R., Tuite, M.F., Hemmings, B.A., Barford, D.
(2000) Cell 100: 311-321
- PubMed: 10676813
- PubMed Abstract:
- A Highly Conserved Eukaryotic Protein Family Possesing Properties of Polypeptide Chain Release Factor
Frolova, L.,Le Goff, X.,Rasmussen, H.H.,Cheperegin, S.,Drugeon, G.,Kress, M.,Arman, I.,Haenni, A.L.,Celis, J.E.,Philippe, M.,Justesen, J.,Kisselev, L.
(1994) Nature 372: 701
- Mutations in the Highly Conserved GGQ Motif of Class 1 Polypeptide Release Factors Abolish Ability of Human eRF1 to Trigger Peptidyl-tRNA Hydrolysis.
Frolova, L.Y.,Tsivkovskii, R.Y.,Sivolobova, G.F.,Oparina, N.Y.,Serpinsky, O.I.,Blinov, V.M.,Tatkov, S.I.,Kisselev, L.L.
(1999) RNA 5: 1014
The release factor eRF1 terminates protein biosynthesis by recognizing stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase center. The crystal structure of human eRF1 to 2.8 A resolution ...
The release factor eRF1 terminates protein biosynthesis by recognizing stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase center. The crystal structure of human eRF1 to 2.8 A resolution, combined with mutagenesis analyses of the universal GGQ motif, reveals the molecular mechanism of release factor activity. The overall shape and dimensions of eRF1 resemble a tRNA molecule with domains 1, 2, and 3 of eRF1 corresponding to the anticodon loop, aminoacyl acceptor stem, and T stem of a tRNA molecule, respectively. The position of the essential GGQ motif at an exposed tip of domain 2 suggests that the Gln residue coordinates a water molecule to mediate the hydrolytic activity at the peptidyl transferase center. A conserved groove on domain 1, 80 A from the GGQ motif, is proposed to form the codon recognition site.
Section of Structural Biology, Institute of Cancer Research, London, United Kingdom.