5w2f

Structural highlights

Function

EIF2D_HUMAN Translation initiation factor that is able to deliver tRNA to the P-site of the eukaryotic ribosome in a GTP-independent manner. The binding of Met-tRNA(I) occurs after the AUG codon finds its position in the P-site of 40S ribosomes, the situation that takes place during initiation complex formation on some specific RNAs. Its activity in tRNA binding with 40S subunits does not require the presence of the aminoacyl moiety. Possesses the unique ability to deliver non-Met (elongator) tRNAs into the P-site of the 40S subunit. In addition to its role in initiation, can promote release of deacylated tRNA and mRNA from recycled 40S subunits following ABCE1-mediated dissociation of post-termination ribosomal complexes into subunits.^{[1] [2]}

See Also

• Eukaryotic initiation factor 3D structures

References

1. ↑ Dmitriev SE, Terenin IM, Andreev DE, Ivanov PA, Dunaevsky JE, Merrick WC, Shatsky IN. GTP-independent tRNA delivery to the ribosomal P-site by a novel eukaryotic translation factor. J Biol Chem. 2010 Aug 27;285(35):26779-87. doi: 10.1074/jbc.M110.119693. Epub, 2010 Jun 21. PMID:20566627 doi:http://dx.doi.org/10.1074/jbc.M110.119693
2. ↑ Skabkin MA, Skabkina OV, Dhote V, Komar AA, Hellen CU, Pestova TV. Activities of Ligatin and MCT-1/DENR in eukaryotic translation initiation and ribosomal recycling. Genes Dev. 2010 Aug 15;24(16):1787-801. doi: 10.1101/gad.1957510. PMID:20713520 doi:http://dx.doi.org/10.1101/gad.1957510