Structural highlights
4w2e is a 56 chain structure with sequence from [1] and Thermus thermophilus. This structure supersedes the now removed PDB entries and 4qjt. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , |
| NonStd Res: | , , , , , |
| Related: | 4qjt, 4qjs |
| Resources: | FirstGlance, OCA, RCSB, PDBsum |
Publication Abstract from PubMed
Elongation factor 4 (EF4/LepA) is a highly conserved guanosine triphosphatase translation factor. It was shown to promote back-translocation of tRNAs on posttranslocational ribosome complexes and to compete with elongation factor G for interaction with pretranslocational ribosomes, inhibiting the elongation phase of protein synthesis. Here, we report a crystal structure of EF4-guanosine diphosphate bound to the Thermus thermophilus ribosome with a P-site tRNA at 2.9 angstroms resolution. The C-terminal domain of EF4 reaches into the peptidyl transferase center and interacts with the acceptor stem of the peptidyl-tRNA in the P site. The ribosome is in an unusual state of ratcheting with the 30S subunit rotated clockwise relative to the 50S subunit, resulting in a remodeled decoding center. The structure is consistent with EF4 functioning either as a back-translocase or a ribosome sequester.
Ribosome structure. Crystal structure of elongation factor 4 bound to a clockwise ratcheted ribosome.,Gagnon MG, Lin J, Bulkley D, Steitz TA Science. 2014 Aug 8;345(6197):684-7. doi: 10.1126/science.1253525. PMID:25104389[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Gagnon MG, Lin J, Bulkley D, Steitz TA. Ribosome structure. Crystal structure of elongation factor 4 bound to a clockwise ratcheted ribosome. Science. 2014 Aug 8;345(6197):684-7. doi: 10.1126/science.1253525. PMID:25104389 doi:http://dx.doi.org/10.1126/science.1253525
