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| == Function == | | == Function == |
| [https://www.uniprot.org/uniprot/W8PFD2_KLEOX W8PFD2_KLEOX] Catalyzes the hydrolytic dehalogenation of small (S)-2-haloalkanoic acids to yield the corresponding (R)-2-hydroxyalkanoic acids.[RuleBase:RU368077] | | [https://www.uniprot.org/uniprot/W8PFD2_KLEOX W8PFD2_KLEOX] Catalyzes the hydrolytic dehalogenation of small (S)-2-haloalkanoic acids to yield the corresponding (R)-2-hydroxyalkanoic acids.[RuleBase:RU368077] |
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| == Publication Abstract from PubMed ==
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| Microbial epoxide hydrolases, cis-Epoxysuccinate hydrolases (CESHs) have been utilized for commercial production of enantiomerically pure L(+)- and D(-)-tartaric acids for decades. However, the stereo-catalytic mechanism of CESH producing L(+)-tartaric acid (CESH[L]) remains unclear. Herein, the crystal structures of two CESH[L]s in ligand-free, product-complexed, and catalytic intermediate forms were determined. These structures revealed the unique specific binding mode for the mirror-symmetric substrate, an active catalytic triad consisting of Asp-His-Glu, and an arginine providing a proton to the oxirane oxygen to facilitate the epoxide ring-opening reaction, which has been pursued for decades. These results provide the structural basis for the rational engineering of these industrial biocatalysts.
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| Deciphering the stereo-specific catalytic mechanisms of cis-epoxysuccinate hydrolases producing L(+)-tartaric acid.,Dong S, Xuan J, Feng Y, Cui Q J Biol Chem. 2024 Jan 8:105635. doi: 10.1016/j.jbc.2024.105635. PMID:38199576<ref>PMID:38199576</ref>
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| From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
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| </div>
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| <div class="pdbe-citations 8wbr" style="background-color:#fffaf0;"></div>
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| == References ==
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| <references/>
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| __TOC__ | | __TOC__ |
| </StructureSection> | | </StructureSection> |
