1cq1

Soluble Quinoprotein Glucose Dehydrogenase from Acinetobacter Calcoaceticus in Complex with PQQH2 and Glucose

spinqualitylabelsall models 1cq1, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1cq1 is a 2 chain structure with sequence from Acinetobacter calcoaceticus. The May 2006 RCSB PDB Molecule of the Month feature on Glucose Oxidase by David S. Goodsell is 10.2210/rcsb_pdb/mom_2006_5. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: BGC, CA, PQQ Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function DHGB_ACICA Oxidizes glucose to gluconolactone. 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 Soluble glucose dehydrogenase (s-GDH; EC 1.1.99.17) is a classical quinoprotein which requires the cofactor pyrroloquinoline quinone (PQQ) to oxidize glucose to gluconolactone. The reaction mechanism of PQQ-dependent enzymes has remained controversial due to the absence of comprehensive structural data. We have determined the X-ray structure of s-GDH with the cofactor at 2.2 A resolution, and of a complex with reduced PQQ and glucose at 1.9 A resolution. These structures reveal the active site of s-GDH, and show for the first time how a functionally bound substrate interacts with the cofactor in a PQQ-dependent enzyme. Twenty years after the discovery of PQQ, our results finally provide conclusive evidence for a reaction mechanism comprising general base-catalyzed hydride transfer, rather than the generally accepted covalent addition-elimination mechanism. Thus, PQQ-dependent enzymes use a mechanism similar to that of nicotinamide- and flavin-dependent oxidoreductases. Structure and mechanism of soluble quinoprotein glucose dehydrogenase.,Oubrie A, Rozeboom HJ, Kalk KH, Olsthoorn AJ, Duine JA, Dijkstra BW EMBO J. 1999 Oct 1;18(19):5187-94. PMID:10508152 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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