6rhx

Single crystal serial study of the inhibition of laccases from Steccherinum murashkinskyi by chloride anions at sub-atomic resolution. Third structure of the series with 315 KGy dose.

spinqualitylabelsall models 6rhx, resolution 0.96Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6rhx is a 1 chain structure with sequence from Steccherinum murashkinskyi. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 0.96Å Ligands: CL, CU, NAG, OXY Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Laccases are enzymes that catalyze the oxidation of a wide range of organic and inorganic substrates accompanied by the reduction of molecular oxygen to water. Here, a subatomic resolution X-ray crystallographic study of the mechanism of inhibition of the laccase from the basidiomycete fungus Steccherinum murashkinskyi by chloride and fluoride ions is presented. Three series of X-ray diffraction data sets were collected with increasing doses of absorbed X-ray radiation from a native S. murashkinskyi laccase crystal and from crystals of complexes of the laccase with chloride and fluoride ions. The data for the native laccase crystal confirmed the previously deduced enzymatic mechanism of molecular oxygen reduction. The structures of the complexes allowed the localization of chloride and fluoride ions in the channel near the T2 copper ion. These ions replace the oxygen ligand of the T2 copper ion in this channel and can play the role of this ligand in the enzymatic reaction. As follows from analysis of the structures from the increasing dose series, the inhibition of laccases by chloride and fluoride anions can be explained by the fact that the binding of these negatively charged ions at the position of the oxygen ligand of the T2 copper ion impedes the reduction of the T2 copper ion. The subatomic resolution study of laccase inhibition by chloride and fluoride anions using single-crystal serial crystallography: insights into the enzymatic reaction mechanism.,Polyakov KM, Gavryushov S, Fedorova TV, Glazunova OA, Popov AN Acta Crystallogr D Struct Biol. 2019 Sep 1;75(Pt 9):804-816. doi: , 10.1107/S2059798319010684. Epub 2019 Aug 22. PMID:31478903 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Laccase 3D structures

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