6IX2 image
Deposition Date 2018-12-09
Release Date 2019-12-11
Last Version Date 2023-11-29
Entry Detail
PDB ID:
6IX2
Keywords:
HYDROLASE
Title:
Structure of the A214C/A250I mutant of an epoxide hydrolase from Aspergillus usamii E001 (AuEH2) at 1.48 Angstroms resolution
Biological Source:
Source Organism:
Aspergillus usamii (Taxon ID: 186680)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.48 Å
R-Value Free:
0.17
R-Value Work:
0.15
R-Value Observed:
0.16
Space Group:
P 1 21 1
6IX2 validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Microsomal epoxide hyddrolase
Gene (Uniprot):EH2
Mutations:A214C, A250I
Chain IDs:A, B
Chain Length:431
Number of Molecules:2
Biological Source:Aspergillus usamii
UniProt ID:T2B4K5 Pfam ID:PF06441
Ligand Molecules
GOL
Primary Citation
Structure-Guided Regulation in the Enantioselectivity of an Epoxide Hydrolase to Produce Enantiomeric Monosubstituted Epoxides and Vicinal Diols via Kinetic Resolution.
Org.Lett. 24 1757 1761 (2022)
PMID: 35229602 DOI: 10.1021/acs.orglett.1c04348

Abstact

Structure-guided microtuning of an Aspergillus usamii epoxide hydrolase was executed. One mutant, A214C/A250I, displayed a 12.6-fold enhanced enantiomeric ratio (E = 202) toward rac-styrene oxide, achieving its nearly perfect kinetic resolution at 0.8 M in pure water or 1.6 M in n-hexanol/water. Several other beneficial mutants also displayed significantly improved E values, offering promising biocatalysts to access 19 structurally diverse chiral monosubstituted epoxides (97.1 - ≥ 99% ees) and vicinal diols (56.2-98.0% eep) with high yields.

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Primary Citation of related structures
6IX2