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Cell Press, Trends in Biochemical Sciences, 12(26), p. 705-709

DOI: 10.1016/s0968-0004(01)02024-2

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Engaging the ribosome: Universal IFs of translation

Journal article published in 2001 by Antonina Roll-Mecak ORCID, Byung-Sik Shin, Thomas E. Dever, Stephen K. Burley
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Eukaryotic initiation factor 1A (eIF1A) and the GTPase IF2/eIF5B are the only universally conserved translation initiation factors. Recent structural, biochemical and genetic data indicate that these two factors form an evolutionarily conserved structural and functional unit in translation initiation. Based on insights gathered from studies of the translation elongation factor GTPases, we propose that these factors occupy the aminoacyl-tRNA site (A site) on the ribosome, and promote initiator tRNA binding and ribosomal subunit joining. These processes yield a translationally competent ribosome with Met-tRNA in the ribosomal peptidyl-tRNA site (P site), base-paired to the AUG start codon of a mRNA.