Dissecting the low catalytic capability of flavin-dependent halogenases.
QM/MM calculations
X-ray structures
flavin monooxygenase
halogenase
kinetics
stopped-flow
Journal
The Journal of biological chemistry
ISSN: 1083-351X
Titre abrégé: J Biol Chem
Pays: United States
ID NLM: 2985121R
Informations de publication
Date de publication:
Historique:
received:
10
09
2020
revised:
11
11
2020
accepted:
13
11
2020
pubmed:
20
1
2021
medline:
15
9
2021
entrez:
19
1
2021
Statut:
ppublish
Résumé
Although flavin-dependent halogenases (FDHs) are attractive biocatalysts, their practical applications are limited because of their low catalytic efficiency. Here, we investigated the reaction mechanisms and structures of tryptophan 6-halogenase (Thal) from Streptomyces albogriseolus using stopped-flow, rapid-quench flow, quantum/mechanics molecular mechanics calculations, crystallography, and detection of intermediate (hypohalous acid [HOX]) liberation. We found that the key flavin intermediate, C4a-hydroperoxyflavin (C4aOOH-FAD), formed by Thal and other FDHs (tryptophan 7-halogenase [PrnA] and tryptophan 5-halogenase [PyrH]), can react with I
Identifiants
pubmed: 33465708
pii: S0021-9258(20)00055-1
doi: 10.1074/jbc.RA120.016004
pmc: PMC7948982
pii:
doi:
Substances chimiques
Flavins
0
Flavin-Adenine Dinucleotide
146-14-5
Hydrogen Peroxide
BBX060AN9V
Oxidoreductases
EC 1.-
tryptophan halogenase
EC 1.-
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
100068Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/L01386X/1
Pays : United Kingdom
Informations de copyright
Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Conflict of interest The authors declare that they have no conflict of interest with the contents of this article.
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