1dt9
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(New page: 200px<br /> <applet load="1dt9" size="450" color="white" frame="true" align="right" spinBox="true" caption="1dt9, resolution 2.7Å" /> '''THE CRYSTAL STRUCTUR...)
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Revision as of 14:29, 12 November 2007
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THE CRYSTAL STRUCTURE OF HUMAN EUKARYOTIC RELEASE FACTOR ERF1-MECHANISM OF STOP CODON RECOGNITION AND PEPTIDYL-TRNA HYDROLYSIS
Overview
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.
About this Structure
1DT9 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
The crystal structure of human eukaryotic release factor eRF1--mechanism of stop codon recognition and peptidyl-tRNA hydrolysis., Song H, Mugnier P, Das AK, Webb HM, Evans DR, Tuite MF, Hemmings BA, Barford D, Cell. 2000 Feb 4;100(3):311-21. PMID:10676813
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