1bs1

DETHIOBIOTIN SYNTHETASE COMPLEXED WITH DETHIOBIOTIN, ADP , INORGANIC PHOSPHATE AND MAGNESIUM

spinqualitylabelsall models 1bs1, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1bs1 is a 1 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.8Å Ligands: ADP, DAA, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function BIOD1_ECOLI Catalyzes a mechanistically unusual reaction, the ATP-dependent insertion of CO2 between the N7 and N8 nitrogen atoms of 7,8-diaminopelargonic acid (DAPA) to form an ureido ring. Only CTP can partially replace ATP while diaminobiotin is only 37% as effective as 7,8-diaminopelargonic acid. 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 The crystal structures of two complexes of dethiobiotin synthetase, enzyme-diaminopelargonic acid-MgADP-AlF3 and enzyme-dethiobiotin-MgADP-Pi, respectively, have been determined to 1.8 A resolution. In dethiobiotin synthetase, AlF3 together with carbamylated diaminopelargonic acid mimics the phosphorylated reaction intermediate rather than the transition state complex for phosphoryl transfer. Observed differences in the binding of substrate, diaminopelargonic acid, and the product, dethiobiotin, suggest considerable displacements of substrate atoms during the ring closure step of the catalytic reaction. In both complexes, two metal ions are observed at the active site, providing evidence for a two-metal mechanism for this enzyme. Crystal structure of two quaternary complexes of dethiobiotin synthetase, enzyme-MgADP-AlF3-diaminopelargonic acid and enzyme-MgADP-dethiobiotin-phosphate; implications for catalysis.,Kack H, Sandmark J, Gibson KJ, Schneider G, Lindqvist Y Protein Sci. 1998 Dec;7(12):2560-6. PMID:9865950 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dethiobiotin synthetase 3D structures

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