4lbi

5-chloro-2-hydroxyhydroquinone dehydrochlorinase (TftG) from Burkholderia phenoliruptrix AC1100: Selenomethionyl Apo-form

spinqualitylabelsall models 4lbi, resolution 2.21Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4lbi is a 4 chain structure with sequence from Burkholderia cepacia. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.21Å Ligands: MSE Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q45075_BURCE Publication Abstract from PubMed TftG, 5-chloro-2-hydroxyhydroquinone (5-CHQ) dehydrochlorinase, is involved in the biodegradation of 2,4,5-trichlorophenoxyacetate by Burkholderia phenoliruptrix AC1100. It belongs to the YCII superfamily, a group of proteins with largely unknown function. In this work, we utilized structural and functional studies, including the apo-form and 2,5-dihydroxybenzoquinone binary complex crystal structures, computational analysis, and site-directed mutagenesis, to determine the dehydrochlorination mechanism. The His-Asp dyad, which initiates catalysis, is strongly conserved in YCII-like proteins. In addition, other catalytically important residues such as Pro-76, which orients the His-Asp catalytic dyad; Arg-17 and Ser-56, which form an oxyanion hole; and Asp-9, which stabilizes the oxyanion hole, are among the most highly conserved residues across the YCII superfamily members. The comprehensive characterization of TftG helps not only for identifying effective mechanisms for chloroaromatic dechlorination but also for understanding the functions of YCII superfamily members, which we propose to be lyases. Catalytic Mechanism of 5-Chlorohydroxyhydroquinone Dehydrochlorinase from the YCII Superfamily of Largely Unknown Function.,Hayes RP, Lewis KM, Xun L, Kang C J Biol Chem. 2013 Oct 4;288(40):28447-28456. Epub 2013 Aug 16. PMID:23955343 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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