4UIR: Structure Of Oleate Hydratase From Elizabethkingia Meningoseptica

Citation:
Abstract
Hydratases provide access to secondary and tertiary alcohols by regio- and/or stereospecifically adding water to carbon-carbon double bonds. Thereby, hydroxy groups are introduced without the need for costly cofactor recycling, and that makes this approach highly interesting on an industrial scale. Here we present the first crystal structure of a recombinant oleate hydratase originating from Elizabethkingia meningoseptica in the presence of flavin adenine dinucleotide (FAD). A structure-based mutagenesis study targeting active site residues identified E122 and Y241 as crucial for the activation of a water molecule and for protonation of the double bond, respectively. Moreover, we also observed that two-electron reduction of FAD results in a sevenfold increase in the substrate hydration rate. We propose the first reaction mechanism for this enzyme class that explains the requirement for the flavin cofactor and the involvement of conserved amino acid residues in this regio- and stereoselective hydration.
PDB ID: 4UIRDownload
MMDB ID: 130500
PDB Deposition Date: 2015/4/2
Updated in MMDB: 2015/08
Experimental Method:
x-ray diffraction
Resolution: 2.75  Å
Source Organism:
Similar Structures:
Biological Unit for 4UIR: dimeric; determined by software (PISA)
Molecular Components in 4UIR
Label Count Molecule
Proteins (2 molecules)
2
Oleate Hydratase
Molecule annotation
Chemicals (5 molecules)
1
1
2
2
3
1
4
1
* Click molecule labels to explore molecular sequence information.

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