1efw

Crystal structure of aspartyl-tRNA synthetase from Thermus thermophilus complexed to tRNAasp from Escherichia coli

spinqualitylabelsall models 1efw, resolution 3.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1efw is a 4 chain structure with sequence from Escherichia coli and Thermus thermophilus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3Å Ligands: 2MA, 4SU, 5MU, G7M, H2U, PSU, QUO Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function SYD_THETH 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 crystal structures of aspartyl-tRNA synthetase (AspRS) from Thermus thermophilus, a prokaryotic class IIb enzyme, complexed with tRNA(Asp) from either T. thermophilus or Escherichia coli reveal a potential intermediate of the recognition process. The tRNA is positioned on the enzyme such that it cannot be aminoacylated but adopts an overall conformation similar to that observed in active complexes. While the anticodon loop binds to the N-terminal domain of the enzyme in a manner similar to that of the related active complexes, its aminoacyl acceptor arm remains at the entrance of the active site, stabilized in its intermediate conformational state by non-specific interactions with the insertion and catalytic domains. The thermophilic nature of the enzyme, which manifests itself in a very low kinetic efficiency at 17 degrees C, the temperature at which the crystals were grown, is in agreement with the relative stability of this non-productive conformational state. Based on these data, a pathway for tRNA binding and recognition is proposed. An intermediate step in the recognition of tRNA(Asp) by aspartyl-tRNA synthetase.,Briand C, Poterszman A, Eiler S, Webster G, Thierry J, Moras D J Mol Biol. 2000 Jun 16;299(4):1051-60. PMID:10843857 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Aminoacyl tRNA synthetase 3D structures Transfer RNA (tRNA)

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