BrvH, a flavin-dependent halogenase from Brevundimonas sp. BAL3

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


A flavin-dependent halogenase from metagenomic analysis prefers bromination over chlorination.

Neubauer, P.R.Widmann, C.Wibberg, D.Schroder, L.Frese, M.Kottke, T.Kalinowski, J.Niemann, H.H.Sewald, N.

(2018) PLoS One 13: e0196797-e0196797

  • DOI: https://doi.org/10.1371/journal.pone.0196797
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Flavin-dependent halogenases catalyse halogenation of aromatic compounds. In most cases, this reaction proceeds with high regioselectivity and requires only the presence of FADH2, oxygen, and halide salts. Since marine habitats contain high concentrations of halides, organisms populating the oceans might be valuable sources of yet undiscovered halogenases. A new Hidden-Markov-Model (HMM) based on the PFAM tryptophan halogenase model was used for the analysis of marine metagenomes. Eleven metagenomes were screened leading to the identification of 254 complete or partial putative flavin-dependent halogenase genes. One predicted halogenase gene (brvH) was selected, codon optimised for E. coli, and overexpressed. Substrate screening revealed that this enzyme represents an active flavin-dependent halogenase able to convert indole to 3-bromoindole. Remarkably, bromination prevails also in a large excess of chloride. The BrvH crystal structure is very similar to that of tryptophan halogenases but reveals a substrate binding site that is open to the solvent instead of being covered by a loop.

  • Organizational Affiliation

    Organic and Bioorganic Chemistry (OCIII), Bielefeld University, Bielefeld, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tryptophan halogenase superfamily
A, B
511Brevundimonas sp. BAL3Mutation(s): 0 
Gene Names: BBAL3_2452
Find proteins for B4WBL8 (Brevundimonas sp. BAL3)
Explore B4WBL8 
Go to UniProtKB:  B4WBL8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB4WBL8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 180.62α = 90
b = 88.35β = 99.07
c = 70.11γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Data collection, Database references, Refinement description