1eqr

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[[Image:1eqr.gif|left|200px]]
[[Image:1eqr.gif|left|200px]]
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{{Structure
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<!--
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|PDB= 1eqr |SIZE=350|CAPTION= <scene name='initialview01'>1eqr</scene>, resolution 2.70&Aring;
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The line below this paragraph, containing "STRUCTURE_1eqr", creates the "Structure Box" on the page.
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|SITE=
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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|LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Aspartate--tRNA_ligase Aspartate--tRNA ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.1.1.12 6.1.1.12] </span>
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|GENE=
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{{STRUCTURE_1eqr| PDB=1eqr | SCENE= }}
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|RELATEDENTRY=[[1c0a|1C0A]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1eqr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1eqr OCA], [http://www.ebi.ac.uk/pdbsum/1eqr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1eqr RCSB]</span>
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}}
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'''CRYSTAL STRUCTURE OF FREE ASPARTYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI'''
'''CRYSTAL STRUCTURE OF FREE ASPARTYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI'''
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[[Category: Rees, B.]]
[[Category: Rees, B.]]
[[Category: Webster, G.]]
[[Category: Webster, G.]]
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[[Category: anti-parallel beta strand]]
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[[Category: Anti-parallel beta strand]]
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[[Category: beta barrel]]
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[[Category: Beta barrel]]
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[[Category: domain]]
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[[Category: Domain]]
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[[Category: oligomer binding fold]]
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[[Category: Oligomer binding fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 15:25:09 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 20:07:58 2008''
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Revision as of 12:25, 2 May 2008

Image:1eqr.gif

Template:STRUCTURE 1eqr

CRYSTAL STRUCTURE OF FREE ASPARTYL-TRNA SYNTHETASE FROM ESCHERICHIA COLI


Overview

The crystal structure of aspartyl-tRNA synthetase from Escherichia coli has been determined to a resolution of 2.7 A. The structure is compared to the same enzyme co-crystallized with tRNA(Asp) and containing aspartyl adenylate or ATP. The asymmetric unit contains three monomers of the enzyme. While most parts of the protein show no significant differences in the three monomers, a few regions cannot be superimposed. Those regions are characterized by a high B-factor, and consist mostly of loops that make contacts with the tRNA in the complexes. The flexibility of the protein is seen at a global level, by the observation of a 10 to 15 degrees rotation of the N-terminal and insertion domains upon tRNA binding, and at the level of the individual amino acid residues, by main-chain and side-chain rearrangements. In contrast to these induced-fit conformational changes, a few residues essential for the tRNA anticodon or aspartyl-adenylate recognition exist in a predefined conformation, ensured by specific interactions within the protein.

About this Structure

1EQR is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Aspartyl tRNA-synthetase from Escherichia coli: flexibility and adaptability to the substrates., Rees B, Webster G, Delarue M, Boeglin M, Moras D, J Mol Biol. 2000 Jun 23;299(5):1157-64. PMID:10873442 Page seeded by OCA on Fri May 2 15:25:09 2008

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