5O3N image
Entry Detail
PDB ID:
5O3N
Keywords:
Title:
Crystal structure of E. cloacae 3,4-dihydroxybenzoic acid decarboxylase (AroY) reconstituted with prFMN
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2017-05-24
Release Date:
2017-09-13
Method Details:
Experimental Method:
Resolution:
2.05 Å
R-Value Free:
0.20
R-Value Work:
0.18
Space Group:
H 3 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:3,4-dihydroxybenzoate decarboxylase
Chain IDs:A, B
Chain Length:515
Number of Molecules:2
Biological Source:Enterobacter cloacae
Primary Citation
Regioselective para-Carboxylation of Catechols with a Prenylated Flavin Dependent Decarboxylase.
Angew. Chem. Int. Ed. Engl. 56 13893 13897 (2017)
PMID: 28857436 DOI: 10.1002/anie.201708091

Abstact

The utilization of CO2 as a carbon source for organic synthesis meets the urgent demand for more sustainability in the production of chemicals. Herein, we report on the enzyme-catalyzed para-carboxylation of catechols, employing 3,4-dihydroxybenzoic acid decarboxylases (AroY) that belong to the UbiD enzyme family. Crystal structures and accompanying solution data confirmed that AroY utilizes the recently discovered prenylated FMN (prFMN) cofactor, and requires oxidative maturation to form the catalytically competent prFMNiminium species. This study reports on the in vitro reconstitution and activation of a prFMN-dependent enzyme that is capable of directly carboxylating aromatic catechol substrates under ambient conditions. A reaction mechanism for the reversible decarboxylation involving an intermediate with a single covalent bond between a quinoid adduct and cofactor is proposed, which is distinct from the mechanism of prFMN-associated 1,3-dipolar cycloadditions in related enzymes.

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