Publication details

The tetrameric structure of the novel haloalkane dehalogenase DpaA from Paraglaciecola agarilytica NO2

Authors

MAZUR Andrii PRUDNIKOVA Tanyana GRINKEVICH Pavel MESTERS Jeroen R. MRAZOVA Daria CHALOUPKOVÁ Radka DAMBORSKÝ Jiří KUTY Michal KOLENKO Petr KUTA SMATANOVA Ivana

Year of publication 2021
Type Article in Periodical
Magazine / Source Acta Crystallographica Section D: Structural Biology
MU Faculty or unit

Faculty of Science

Citation
Web https://scripts.iucr.org/cgi-bin/paper?S2059798321000486
Doi http://dx.doi.org/10.1107/S2059798321000486
Keywords DpaA; crystallization; haloalkane dehalogenases; halogenated pollutants; tetrameric structure; oligomerization
Description Haloalkane dehalogenases (EC 3.8.1.5) are microbial enzymes that catalyse the hydrolytic conversion of halogenated compounds, resulting in a halide ion, a proton and an alcohol. These enzymes are used in industrial biocatalysis, bioremediation and biosensing of environmental pollutants or for molecular tagging in cell biology. The novel haloalkane dehalogenase DpaA described here was isolated from the psychrophilic and halophilic bacterium Paraglaciecola agarilytica NO2, which was found in marine sediment collected from the East Sea near Korea. Gel-filtration experiments and size-exclusion chromatography provided information about the dimeric composition of the enzyme in solution. The DpaA enzyme was crystallized using the sitting-drop vapour-diffusion method, yielding rod-like crystals that diffracted X-rays to 2.0 angstrom resolution. Diffraction data analysis revealed a case of merohedral twinning, and subsequent structure modelling and refinement resulted in a tetrameric model of DpaA, highlighting an uncommon multimeric nature for a protein belonging to haloalkane dehalogenase subfamily I.
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