Structure analysis of haloalkane dehalogenase DbeA ΔCl variant from Bradyrhizobium elkanii USDA94
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چکیده
منابع مشابه
Structure and activity of DmmA, a marine haloalkane dehalogenase.
DmmA is a haloalkane dehalogenase (HLD) identified and characterized from the metagenomic DNA of a marine microbial consortium. Dehalogenase activity was detected with 1,3-dibromopropane as substrate, with steady-state kinetic parameters typical of HLDs (K(m) = 0.24 ± 0.05 mM, k(cat) = 2.4 ± 0.1 s(-1) ). The 2.2-Å crystal structure of DmmA revealed a fold and active site similar to other HLDs...
متن کاملStereoselectivity and conformational stability of haloalkane dehalogenase DbjA from Bradyrhizobium japonicum USDA110: the effect of pH and temperature.
The effect of pH and temperature on structure, stability, activity and enantioselectivity of haloalkane dehalogenase DbjA from Bradyrhizobium japonicum USDA110 was investigated in this study. Conformational changes have been assessed by circular dichroism spectroscopy, functional changes by kinetic analysis, while quaternary structure was studied by gel filtration chromatography. Our study show...
متن کاملKinetic analysis and X-ray structure of haloalkane dehalogenase with a modified halide-binding site.
Haloalkane dehalogenase (DhlA) catalyzes the hydrolysis of haloalkanes via an alkyl-enzyme intermediate. Trp175 forms a halogen/halide-binding site in the active-site cavity together with Trp125. To get more insight in the role of Trp175 in DhlA, we mutated residue 175 and explored the kinetics and X-ray structure of the Trp175Tyr enzyme. The mutagenesis study indicated that an aromatic residue...
متن کاملDiscovery of Novel Haloalkane Dehalogenase Inhibitors.
Haloalkane dehalogenases (HLDs) have recently been discovered in a number of bacteria, including symbionts and pathogens of both plants and humans. However, the biological roles of HLDs in these organisms are unclear. The development of efficient HLD inhibitors serving as molecular probes to explore their function would represent an important step toward a better understanding of these interest...
متن کاملSpecificity and kinetics of haloalkane dehalogenase.
Haloalkane dehalogenase converts halogenated alkanes to their corresponding alcohols. The active site is buried inside the protein and lined with hydrophobic residues. The reaction proceeds via a covalent substrate-enzyme complex. This paper describes a steady-state and pre-steady-state kinetic analysis of the conversion of a number of substrates of the dehalogenase. The kinetic mechanism for t...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section A Foundations and Advances
سال: 2018
ISSN: 2053-2733
DOI: 10.1107/s2053273318091957