4ob3: Difference between revisions
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''' | ==Crystal Structure of Nitrile Hydratase from Pseudonocardia thermophila : A Reference Structure to Boronic Acid Inhibition of Nitrile Hydratase== | ||
<StructureSection load='4ob3' size='340' side='right' caption='[[4ob3]], [[Resolution|resolution]] 1.92Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4ob3]] is a 2 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4OB3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4OB3 FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO:COBALT+(II)+ION'>CO</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene></td></tr> | |||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=CSD:3-SULFINOALANINE'>CSD</scene>, <scene name='pdbligand=CSO:S-HYDROXYCYSTEINE'>CSO</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4ob0|4ob0]], [[4ob1|4ob1]], [[4ob2|4ob2]]</td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Nitrile_hydratase Nitrile hydratase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.2.1.84 4.2.1.84] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ob3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ob3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4ob3 RCSB], [http://www.ebi.ac.uk/pdbsum/4ob3 PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Nitrile hydratase (NHase) catalyzes the hydration of nitriles to their corresponding commercially valuable amides at ambient temperatures and physiological pH. Several reaction mechanisms have been proposed for NHase enzymes; however, the source of the nucleophile remains a mystery. Boronic acids have been shown to be potent inhibitors of numerous hydrolytic enzymes due to the open shell of boron, which allows it to expand from a trigonal planar (sp(2)) form to a tetrahedral form (sp(3)). Therefore, we examined the inhibition of the Co-type NHase from Pseudonocardia thermophila JCM 3095 (PtNHase) by boronic acids via kinetics and X-ray crystallography. Both 1-butaneboronic acid (BuBA) and phenylboronic acid (PBA) function as potent competitive inhibitors of PtNHase. X-ray crystal structures for BuBA and PBA complexed to PtNHase were solved and refined at 1.5, 1.6, and 1.2 A resolution. The resulting PtNHase-boronic acid complexes represent a "snapshot" of reaction intermediates and implicate the cysteine-sulfenic acid ligand as the catalytic nucleophile, a heretofore unknown role for the alphaCys(113)-OH sulfenic acid ligand. Based on these data, a new mechanism of action for the hydration of nitriles by NHase is presented. | |||
The | The active site sulfenic acid ligand in nitrile hydratases can function as a nucleophile.,Martinez S, Wu R, Sanishvili R, Liu D, Holz R J Am Chem Soc. 2014 Jan 29;136(4):1186-9. doi: 10.1021/ja410462j. Epub 2014 Jan, 13. PMID:24383915<ref>PMID:24383915</ref> | ||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Nitrile hydratase]] | |||
[[Category: Dali, L]] | |||
[[Category: Richard, H]] | |||
[[Category: Rui, W]] | |||
[[Category: Ruslan, S]] | |||
[[Category: Salette, M]] | |||
[[Category: Lyase]] | |||
[[Category: Nulceophile]] | |||
Revision as of 07:52, 26 November 2014
Crystal Structure of Nitrile Hydratase from Pseudonocardia thermophila : A Reference Structure to Boronic Acid Inhibition of Nitrile Hydratase
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