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Updated: Jul 30, 2026
Analysis of Translation Initiation During Stress Conditions by Polysome Profiling
Published on: May 19, 2014
Eukaryotic translation initiation: there are (at least) two sides to every story
1Department of Molecular and Cell Biology, University of California, Berkeley 94720, USA. asachs@uclink4.berkeley.edu
Abstract:
The eukaryotic cap and poly(A) tail binding proteins, eIF4E and Pab1p, play important roles in the initiation of protein synthesis. The recent structures of the complex of eIF4E bound to the methylated guanosine (cap) found at the 5'end of messenger RNA (mRNA), the complex of eIF4E bound to peptide fragments of two related translation factors (eIF4G and 4E-BP1), and the complex of the N-terminal fragment of Pab1p bound to polyadenylate RNA have revealed that eIF4E and Pab1p contain at least two distinct functional surfaces. One surface is used for binding mRNA, and the other for binding proteins involved in translation initiation.
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01:31Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
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