4eir | pdb_00004eir

Structural basis for substrate targeting and catalysis by fungal polysaccharide monooxygenases (PMO-2)

spinqualitylabelsall models 4eir, resolution 1.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4eir is a 2 chain structure with sequence from Neurospora crassa OR74A. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU, GOL, HIC, NAG, OXY Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [Q1K8B6_NEUCR] Publication Abstract from PubMed The use of cellulases remains a major cost in the production of renewable fuels and chemicals from lignocellulosic biomass. Fungi secrete copper-dependent polysaccharide monooxygenases (PMOs) that oxidatively cleave crystalline cellulose and improve the effectiveness of cellulases. However, the means by which PMOs recognize and cleave their substrates in the plant cell wall remain unclear. Here, we present structures of Neurospora crassa PMO-2 and PMO-3 at 1.10 and 1.37 A resolution, respectively. In the structures, dioxygen species are found in the active sites, consistent with the proposed cleavage mechanism. Structural and sequence comparisons between PMOs also reveal that the enzyme substrate-binding surfaces contain highly varied aromatic amino acid and glycosylation positions. The structures reported here provide evidence for a wide range of PMO substrate recognition patterns in the plant cell wall, including binding modes that traverse multiple glucan chains. Structural Basis for Substrate Targeting and Catalysis by Fungal Polysaccharide Monooxygenases.,Li X, Beeson WT 4th, Phillips CM, Marletta MA, Cate JH Structure. 2012 May 9. PMID:22578542 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Monooxygenase 3D structures

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