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1q4w

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[[Image:1q4w.jpg|left|200px]]
[[Image:1q4w.jpg|left|200px]]
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{{Structure
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<!--
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|PDB= 1q4w |SIZE=350|CAPTION= <scene name='initialview01'>1q4w</scene>, resolution 1.93&Aring;
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The line below this paragraph, containing "STRUCTURE_1q4w", 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=DQU:2,6-DIAMINO-3H-QUINAZOLIN-4-ONE'>DQU</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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/Queuine_tRNA-ribosyltransferase Queuine tRNA-ribosyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.4.2.29 2.4.2.29] </span>
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or leave the SCENE parameter empty for the default display.
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|GENE= TGT ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=542 Zymomonas mobilis])
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-->
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|DOMAIN=
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{{STRUCTURE_1q4w| PDB=1q4w | SCENE= }}
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|RELATEDENTRY=[[1pud|1pud]], [[1k4g|1k4g]], [[1k4h|1k4h]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q4w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q4w OCA], [http://www.ebi.ac.uk/pdbsum/1q4w PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1q4w RCSB]</span>
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}}
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'''CRYSTAL STRUCTURE OF TGT IN COMPLEX WITH 2,6-DIAMINO-3H-QUINAZOLIN-4-ONE'''
'''CRYSTAL STRUCTURE OF TGT IN COMPLEX WITH 2,6-DIAMINO-3H-QUINAZOLIN-4-ONE'''
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[[Category: Reuter, K.]]
[[Category: Reuter, K.]]
[[Category: Stubbs, M T.]]
[[Category: Stubbs, M T.]]
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[[Category: transferase]]
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[[Category: Transferase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 05:52:09 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 23:08:55 2008''
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Revision as of 02:52, 3 May 2008

Image:1q4w.jpg

Template:STRUCTURE 1q4w

CRYSTAL STRUCTURE OF TGT IN COMPLEX WITH 2,6-DIAMINO-3H-QUINAZOLIN-4-ONE


Overview

The enzyme tRNA-guanine transglycosylase (TGT) is involved in the pathogenicity of Shigellae. As the crystal structure of this protein is known, it is a putative target for the structure-based design of inhibitors. Here we report a crystallographic study of several new ligands exhibiting a 2,6-diamino-3H-quinazolin-4-one scaffold, which has been shown recently to be a promising template for TGT-inhibitors. Crystal structure analysis of these complexes has revealed an unexpected movement of the side-chain of Asp102. A detailed analysis of the water network disrupted by this rotation has lead to the derivation of a new composite pharmacophore. A virtual screening has been performed based on this pharmacophore hypothesis and several new inhibitors of micromolar binding affinity with new skeletons have been discovered.

About this Structure

1Q4W is a Single protein structure of sequence from Zymomonas mobilis. Full crystallographic information is available from OCA.

Reference

Crystallographic study of inhibitors of tRNA-guanine transglycosylase suggests a new structure-based pharmacophore for virtual screening., Brenk R, Meyer EA, Reuter K, Stubbs MT, Garcia GA, Diederich F, Klebe G, J Mol Biol. 2004 Apr 16;338(1):55-75. PMID:15050823 Page seeded by OCA on Sat May 3 05:52:09 2008

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