5tki | pdb_00005tki

Neurospora crassa polysaccharide monooxygenase 2 resting state joint X-ray/neutron refinement

spinqualitylabelsall models 5tki, resolution 1.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5tki is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, NAG Related: 5tkh, 5tkf, 5tkg Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Lytic polysaccharide monooxygenases have attracted vast attention owing to their abilities to disrupt glycosidic bonds via oxidation instead of hydrolysis and to enhance enzymatic digestion of recalcitrant substrates including chitin and cellulose. We have determined high-resolution X-ray crystal structures of an enzyme from Neurospora crassa in the resting state and of a copper(II) dioxo intermediate complex formed in the absence of substrate. X-ray crystal structures also revealed "pre-bound" molecular oxygen adjacent to the active site. An examination of protonation states enabled by neutron crystallography and density functional theory calculations identified a role for a conserved histidine in promoting oxygen activation. These results provide a new structural description of oxygen activation by substrate free lytic polysaccharide monooxygenases and provide insights that can be extended to reactivity in the enzyme-substrate complex. Oxygen Activation at the Active Site of a Fungal Lytic Polysaccharide Monooxygenase.,O'Dell WB, Agarwal PK, Meilleur F Angew Chem Int Ed Engl. 2017 Jan 16;56(3):767-770. doi: 10.1002/anie.201610502., Epub 2016 Dec 22. PMID:28004877 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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