3fbw

Structure of Rhodococcus rhodochrous haloalkane dehalogenase DhaA mutant C176Y

spinqualitylabelsall models 3fbw, resolution 1.23Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3fbw is a 1 chain structure with sequence from "bacterium_mycoides_roseum"_grotenfelt_1889 "bacterium mycoides roseum" grotenfelt 1889. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: BEZ, CL, MG Related: 3g9x, 3fwh Gene: dhaA ("Bacterium mycoides roseum" Grotenfelt 1889) Activity: Haloalkane dehalogenase, with EC number 3.8.1.5 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [DHAA_RHORH] Catalyzes hydrolytic cleavage of carbon-halogen bonds in halogenated aliphatic compounds, leading to the formation of the corresponding primary alcohols, halide ions and protons. Expresses halogenase activity against 1-chloroalkanes of chain length C3 to C10, and also shows a very weak activity with 1,2-dichloroethane. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The haloalkane dehalogenase DhaA from Rhodococcus rhodochrous NCIMB 13064 is a bacterial enzyme that shows catalytic activity for the hydrolytic degradation of the highly toxic industrial pollutant 1,2,3-trichloropropane (TCP). Mutagenesis focused on the access tunnels of DhaA produced protein variants with significantly improved activity towards TCP. Three mutants of DhaA named DhaA04 (C176Y), DhaA14 (I135F) and DhaA15 (C176Y + I135F) were constructed in order to study the functional relevance of the tunnels connecting the buried active site of the protein with the surrounding solvent. All three protein variants were crystallized using the sitting-drop vapour-diffusion technique. The crystals of DhaA04 belonged to the orthorhombic space group P2(1)2(1)2(1), while the crystals of DhaA14 and DhaA15 had triclinic symmetry in space group P1. The crystal structures of DhaA04, DhaA14 and DhaA15 with ligands present in the active site were solved and refined using diffraction data to 1.23, 0.95 and 1.22 A, resolution, respectively. Structural comparisons of the wild type and the three mutants suggest that the tunnels play a key role in the processes of ligand exchange between the buried active site and the surrounding solvent. Atomic resolution studies of haloalkane dehalogenases DhaA04, DhaA14 and DhaA15 with engineered access tunnels.,Stsiapanava A, Dohnalek J, Gavira JA, Kuty M, Koudelakova T, Damborsky J, Kuta Smatanova I Acta Crystallogr D Biol Crystallogr. 2010 Sep;66(Pt 9):962-9. Epub 2010, Aug 13. PMID:20823547 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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