Related Experiment Video
Updated: Feb 8, 2026

Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
Published on: February 28, 2017
Preparation and Characterization of Tetrabromopyrrole Debrominase From Marine Proteobacteria
Jonathan R Chekan1, Bradley S Moore2
1Scripps Institution of Oceanography, University of California at San Diego, La Jolla, CA, United States.
Abstract:
While halogenases have been studied for decades, the first natural product dehalogenase was only recently described. This bacterial enzyme, Bmp8, catalyzes the reductive debromination of 2,3,4,5-tetrabromopyrrole to form 2,3,4-tribromopyrrole as part of the biosynthesis of pentabromopseudilin, a marine natural product. Bmp8 is hypothesized to utilize a catalytic mechanism analogous to the important human thyroid hormone deiodinase enzyme family, potentially enabling Bmp8 to serve as model system to study this conserved mechanism. Herein, we describe a method for the soluble expression and purification of Bmp8. Furthermore, we detail activity assay protocols to quantify both consumption of the tetrabromopyrrole substrate and formation of the tribromopyrrole product. These methods will enable further study of this unusual enzyme and its catalytic mechanism.
Related Concept Videos
Bacterial Phylum Proteobacteria
Preparation of Epoxides
Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization.
Epoxidation with Peroxy Acids
Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
Preparation of Amides
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
Preparation of Nitriles
Preparation and Reactions of Thiols
Preparation of Acid Anhydrides
The carboxylate ion acts as a nucleophile that attacks the carbonyl carbon of the acid chloride to form a tetrahedral intermediate. Subsequently, the re-formation of the carbonyl group with the loss of the chloride ion as a leaving group leads to the formation of an acid...

