Structural highlights
1tkg is a 1 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | |
| Related: | 1qf6, 1tje, 1tke, 1tky |
| Gene: | THRS, B1719, C2116, SF1512, S1630 ("Bacillus coli" Migula 1895) |
| Activity: | Threonine--tRNA ligase, with EC number 6.1.1.3 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Function
[SYT_ECOLI] ThrS is also a translational repressor protein, it controls the translation of its own gene by binding to its mRNA.[HAMAP-Rule:MF_00184]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The fidelity of aminoacylation of tRNA(Thr) by the threonyl-tRNA synthetase (ThrRS) requires the discrimination of the cognate substrate threonine from the noncognate serine. Misacylation by serine is corrected in a proofreading or editing step. An editing site has been located 39 A away from the aminoacylation site. We report the crystal structures of this editing domain in its apo form and in complex with the serine product, and with two nonhydrolyzable analogs of potential substrates: the terminal tRNA adenosine charged with serine, and seryl adenylate. The structures show how serine is recognized, and threonine rejected, and provide the structural basis for the editing mechanism, a water-mediated hydrolysis of the mischarged tRNA. When the adenylate analog binds in the editing site, a phosphate oxygen takes the place of one of the catalytic water molecules, thereby blocking the reaction. This rules out a correction mechanism that would occur before the binding of the amino acid on the tRNA.
Achieving error-free translation; the mechanism of proofreading of threonyl-tRNA synthetase at atomic resolution.,Dock-Bregeon AC, Rees B, Torres-Larios A, Bey G, Caillet J, Moras D Mol Cell. 2004 Nov 5;16(3):375-86. PMID:15525511[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Dock-Bregeon AC, Rees B, Torres-Larios A, Bey G, Caillet J, Moras D. Achieving error-free translation; the mechanism of proofreading of threonyl-tRNA synthetase at atomic resolution. Mol Cell. 2004 Nov 5;16(3):375-86. PMID:15525511 doi:http://dx.doi.org/10.1016/j.molcel.2004.10.002
