The crystal structure of a ternary protein complex has been determined at 2.4 angstrom resolution. The complex is composed of three electron transfer proteins from Paracoccus denitrificans, the quinoprotein methylamine dehydrogenase, the blue copper protein amicyanin, and the cytochrome c551i ...
The crystal structure of a ternary protein complex has been determined at 2.4 angstrom resolution. The complex is composed of three electron transfer proteins from Paracoccus denitrificans, the quinoprotein methylamine dehydrogenase, the blue copper protein amicyanin, and the cytochrome c551i. The central region of the c551i is folded similarly to several small bacterial c-type cytochromes; there is a 45-residue extension at the amino terminus and a 25-residue extension at the carboxyl terminus. The methylamine dehydrogenase-amicyanin interface is largely hydrophobic, whereas the amicyanin-cytochrome interface is more polar, with several charged groups present on each surface. Analysis of the simplest electron transfer pathways between the redox partners points out the importance of other factors such as energetics in determining the electron transfer rates.
Related Citations:
Crystal Structure Analysis of Amicyanin and Apoamicyanin from Paraccus Denitrificans at 2.0 Angstroms and 1.8 Angstroms Resolution Durley, R., Chen, L., Lim, L.W., Mathews, F.S., Davidson, V.L. (1993) Protein Sci 2: 739
Preliminary Crystal Structure Studies of a Ternary Electron Transfer Complex between a Quinoprotein, a Blue Copper Protein, and a C-Type Cytochrome Chen, L., Mathews, F.S., Davidson, V.L., Tegoni, M., Rivetti, C., Rossi, G.L. (1993) Protein Sci 2: 147
Crystal Structure of an Electron-Transfer Complex between Methylamine Dehydrogenase and Amicyanin Chen, L., Durley, R., Poliks, B.J., Hamada, K., Chen, Z., Mathews, F.S., Davidson, V.L., Satow, Y., Huizinga, E., Vellieux, F.M.D., Hol, W.G.J. (1992) Biochemistry 31: 4959
Three-Dimensional Structure of the Quinoprotein Methylamine Dehydrogenase from Paracoccus Denitrificans Determined by Molecular Replacement at 2.8 Angstroms Resolution Chen, L., Mathews, F.S., Davidson, V.L., Huizinga, E.G., Vellieux, F.M.D., Hol, W.G.J. (1992) Proteins 14: 288
Organizational Affiliation:
Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine, St. Louis, MO 63110.
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