Download MendeleyWeak Activity of Haloalkane Dehalogenase Linb with 1,2,3-Trichloropropane Revealed by X-Ray Crystallography and Microcalorimetry
Minincova, M., Prokop, Z., Vevodova, J., Nagata, Y., Damborsky, J.(2007) Appl Environ Microbiol 73: 2005
- PubMed: 17259360
- DOI: https://doi.org/10.1128/AEM.02416-06
- Primary Citation of Related Structures:
2BFN - PubMed Abstract:
1,2,3-Trichloropropane (TCP) is a highly toxic and recalcitrant compound. Haloalkane dehalogenases are bacterial enzymes that catalyze the cleavage of a carbon-halogen bond in a wide range of organic halogenated compounds. Haloalkane dehalogenase LinB from Sphingobium japonicum UT26 has, for a long time, been considered inactive with TCP, since the reaction cannot be easily detected by conventional analytical methods. Here we demonstrate detection of the weak activity (k(cat) = 0.005 s(-1)) of LinB with TCP using X-ray crystallography and microcalorimetry. This observation makes LinB a useful starting material for the development of a new biocatalyst toward TCP by protein engineering. Microcalorimetry is proposed to be a universal method for the detection of weak enzymatic activities. Detection of these activities is becoming increasingly important for engineering novel biocatalysts using the scaffolds of proteins with promiscuous activities.
- Loschmidt Laboratories, Masaryk University, Kamenice 5/A4, 625 00 Brno, Czech Republic.
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