ISDA

Entry Detail

PDB ID:

1DT9

Keywords:

Title:

THE CRYSTAL STRUCTURE OF HUMAN EUKARYOTIC RELEASE FACTOR ERF1-MECHANISM OF STOP CODON RECOGNITION AND PEPTIDYL-TRNA HYDROLYSIS

Biological Source:

Source Organism:

Homo sapiens

PDB Version:

Deposition Date:

2000-01-12

Release Date:

2000-02-02

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.70 Å

R-Value Free:

0.31

R-Value Work:

0.24

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:PROTEIN (EUKARYOTIC PEPTIDE CHAIN RELEASE FACTOR SUBUNIT 1)
Chain IDs:A
Chain Length:437
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P62495 Pfam ID:PF03463, PF03464, PF03465

Primary Citation

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, Frolova, L.Y, Tsivkovskii, R.Y, Sivolobova, G.F, Oparina, N.Y, Serpinsky, O.I, Blinov, V.M, Tatkov, S.I, Kisselev, L.L, 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.Show

Cell(Cambridge,Mass.) 100 311 321 (2000)

PMID: 10676813 DOI: 10.1016/S0092-8674(00)80667-4

Abstact

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.

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