View source for 5kvc


==Thermostable mutant of halohydrin dehalogenase (HheC)==
<StructureSection load='5kvc' size='340' side='right'caption='[[5kvc]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5kvc]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Agrobacterium_tumefaciens Agrobacterium tumefaciens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5KVC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5KVC FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.501&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=IMD:IMIDAZOLE'>IMD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=5kvc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5kvc OCA], [https://pdbe.org/5kvc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5kvc RCSB], [https://www.ebi.ac.uk/pdbsum/5kvc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5kvc ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q93D82_RHIRD Q93D82_RHIRD] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
To improve the applicability of halohydrin dehalogenase as a catalyst for reactions in the presence of organic cosolvents, we explored a computational library design strategy (Framework for Rapid Enzyme Stabilization by Computational libraries) that involves discovery and in silico evaluation of stabilizing mutations. Energy calculations, disulfide bond predictions and molecular dynamics simulations identified 218 point mutations and 35 disulfide bonds with predicted stabilizing effects. Experiments confirmed 29 stabilizing point mutations, most of which were located in two distinct regions, whereas introduction of disulfide bonds was not effective. Combining the best mutations resulted in a 12-fold mutant (HheC-H12) with a 28 degrees C higher apparent melting temperature and a remarkable increase in resistance to cosolvents. This variant also showed a higher optimum temperature for catalysis while activity at low temperature was preserved. Mutant H12 was used as a template for the introduction of mutations that enhance enantioselectivity or activity. Crystal structures showed that the structural changes in the H12 mutant mostly agreed with the computational predictions and that the enhanced stability was mainly due to mutations that redistributed surface charges and improved interactions between subunits, the latter including better interactions of water molecules at the subunit interfaces.

A robust cosolvent-compatible halohydrin dehalogenase by computational library design.,Arabnejad H, Dal Lago M, Jekel PA, Floor RJ, Thunnissen AW, Terwisscha van Scheltinga AC, Wijma HJ, Janssen DB Protein Eng Des Sel. 2016 Dec 19. doi: 10.1093/protein/gzw068. PMID:27999093<ref>PMID:27999093</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5kvc" style="background-color:#fffaf0;"></div>

==See Also==
*[[Dehalogenase 3D structures|Dehalogenase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Agrobacterium tumefaciens]]
[[Category: Large Structures]]
[[Category: Dal Lago M]]
[[Category: Terwisscha van Scheltinga AC]]