1qf6: Difference between revisions

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[[Image:1qf6.gif|left|200px]]
[[Image:1qf6.png|left|200px]]


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==Overview==
{{ABSTRACT_10319817}}
E. coli threonyl-tRNA synthetase (ThrRS) is a class II enzyme that represses the translation of its own mRNA. We report the crystal structure at 2.9 A resolution of the complex between tRNA(Thr) and ThrRS, whose structural features reveal novel strategies for providing specificity in tRNA selection. These include an amino-terminal domain containing a novel protein fold that makes minor groove contacts with the tRNA acceptor stem. The enzyme induces a large deformation of the anticodon loop, resulting in an interaction between two adjacent anticodon bases, which accounts for their prominent role in tRNA identity and translational regulation. A zinc ion found in the active site is implicated in amino acid recognition/discrimination.


==About this Structure==
==About this Structure==
1QF6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The following page contains interesting information on the relation of 1QF6 with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb16_1.html Aminoacyl-tRNA Synthetases]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QF6 OCA].  
1QF6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. The following page contains interesting information on the relation of 1QF6 with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb16_1.html Aminoacyl-tRNA Synthetases]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QF6 OCA].  
==Reference==
The structure of threonyl-tRNA synthetase-tRNA(Thr) complex enlightens its repressor activity and reveals an essential zinc ion in the active site., Sankaranarayanan R, Dock-Bregeon AC, Romby P, Caillet J, Springer M, Rees B, Ehresmann C, Ehresmann B, Moras D, Cell. 1999 Apr 30;97(3):371-81. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10319817 10319817]
[[Category: Aminoacyl-tRNA Synthetases]]
[[Category: Aminoacyl-tRNA Synthetases]]
[[Category: Escherichia coli]]
[[Category: Escherichia coli]]
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[[Category: Translational regulation]]
[[Category: Translational regulation]]
[[Category: Zinc]]
[[Category: Zinc]]
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