3c75 | pdb_00003c75

Paracoccus versutus methylamine dehydrogenase in complex with amicyanin

spinqualitylabelsall models 3c75, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3c75 is a 6 chain structure with sequence from Paracoccus versutus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CU NonStd Res: TRQ Activity: Amine dehydrogenase, with EC number 1.4.99.3 Resources: FirstGlance, OCA, RCSB, PDBsum 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 Methylamine can be used as the sole carbon source of certain methylotrophic bacteria. Methylamine dehydrogenase catalyzes the conversion of methylamine into formaldehyde and donates electrons to the electron transfer protein amicyanin. The crystal structure of the complex of methylamine dehydrogenase and amicyanin from Paracoccus versutus has been determined, and the rate of electron transfer from the tryptophan tryptophylquinone cofactor of methylamine dehydrogenase to the copper ion of amicyanin in solution has been determined. In the presence of monovalent ions, the rate of electron transfer from the methylamine-reduced TTQ is much higher than in their absence. In general, the kinetics are similar to those observed for the system from Paracoccus denitrificans. The complex in solution has been studied using nuclear magnetic resonance. Signals of perdeuterated, (15)N-enriched amicyanin bound to methylamine dehydrogenase are observed. Chemical shift perturbation analysis indicates that the dissociation rate constant is approximately 250 s (-1) and that amicyanin assumes a well-defined position in the complex in solution. The most affected residues are in the interface observed in the crystal structure, whereas smaller chemical shift changes extend to deep inside the protein. These perturbations can be correlated to small differences in the hydrogen bond network observed in the crystal structures of free and bound amicyanin. This study indicates that chemical shift changes can be used as reliable indicators of subtle structural changes even in a complex larger than 100 kDa. Structural Comparison of Crystal and Solution States of the 138 kDa Complex of Methylamine Dehydrogenase and Amicyanin from Paracoccus versutus.,Cavalieri C, Biermann N, Vlasie MD, Einsle O, Merli A, Ferrari D, Rossi GL, Ubbink M Biochemistry. 2008 May 31. PMID:18512962 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Methylamine dehydrogenase

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