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Protein Expression and Purification
Article . 2012 . Peer-reviewed
License: Elsevier TDM
Data sources: Crossref
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Heterologous expression, purification and cofactor reconstitution of the reductive dehalogenase PceA from Dehalobacter restrictus

Authors: Sjuts H; Fisher K; Dunstan MS; Rigby SE; Leys D.;

Heterologous expression, purification and cofactor reconstitution of the reductive dehalogenase PceA from Dehalobacter restrictus

Abstract

Organohalide respiration is used by a limited set of anaerobic bacteria to derive energy from the reduction of halogenated organic compounds. The enzymes that catalyze the reductive dehalogenation reaction, the reductive dehalogenases, represent a novel and distinct class of cobalamin and Fe-S cluster dependent enzymes. Until now, biochemical studies on reductive dehalogenases have been hampered by the lack of a reliable protein source. Here we present an efficient and robust heterologous production system for the reductive dehalogenase PceA from Dehalobacter restrictus. Large quantities of Strep-tagged PceA fused to a cold-shock induced trigger factor could be obtained from Escherichia coli. The recombinant enzyme was conveniently purified in milligram quantities under anaerobic conditions by StrepTactin affinity chromatography, and the trigger factor could be removed through limited proteolysis. Characterization of the purified PceA by UV-Vis and electron paramagnetic resonance (EPR) spectroscopy reveal that the recombinant protein binds methylcobalamin in the base-on form after proteolytic cleavage of the trigger factor, and that 4Fe-4S clusters can be chemically reconstituted under anoxic conditions. This study demonstrates a novel PceA production platform that allows further study of this new enzyme class.

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Keywords

Recombinant Fusion Proteins, Coenzymes, Electron Spin Resonance Spectroscopy, Reproducibility of Results, Vitamin B 12, Bacterial Proteins, Peptococcaceae, Escherichia coli, Electrophoresis, Polyacrylamide Gel, Cloning, Molecular, Oxidoreductases

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
27
Top 10%
Top 10%
Top 10%
bronze