Abstract
The relative midpoints of the cofactors in the reaction center protein (RC) from Rp. viridis were calculated by solving the Poisson-Boltzmann equation with a finite difference algorithm. This yields the electrostatic potential throughout the RC which can provide the energetic cost of oxidizing or reducing each site. For the 4 hemes of the bound cytochrome subunit the calculations are in quite good agreement with the experimentally determined relative heme midpoints. The success of the method allows the factors that generate the differences in their in situ electrochemistry to be identified. In order of importance these appear to be: (1) the distribution of charged residues throughout the protein; (2) the perturbation of the midpoint of the high potential hemes by the oxidized lower potential sites; (3) the nature of the axial ligands; (4) differences in the stabilization of the charged heme by solvent. Preliminary calculations were also carried out on the cofactors within the RC.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Jortner, J., (1980) Biochim. biophys. Acta. 594, 193–230.
Marcus, R. A., Sutin, N., (1985) Biochim. biophys. Acta. 811, 265–322.
Closs, G. L, Miller, J. M., (1988) Science 240, 440–447.
Gunner, M. R., Robertson, D. E., Dutton, P. L, (1986) J. Phys. Chem. 90, 3783–3795.
Gunner, M. R., Dutton, P. L., (1989) J. Am. Chem. Soc. 111, 3400–3412.
Deisenhofer, J., Epp, O., Miki, R., Michel, H., (1985) Nature 318, 618–624.
Michel, H., Epp, O., Deisenhofer, J., (1986) The EMBO Journal 5, 2445–2451.
Allen, J. P., Feher, G., Yeates, T. O., Komiya, H., Rees, D. C, (1987) Proc. Natl. Acad. Sci. USA 84, 5730–5734.
Chang, C. H., Tiede, D., Tang, J., Smith, U., Norris, J., Schiffer, M., (1986) FEBS Lett. 205, 82–86.
Plato, M., Mobius, K., Michel-Beyerle, M. E., Bixon, M., Jortner, J., (1988) J. Am. Chem. Soc. 110, 7279–7285.
Won, Y., Friesner, R. A., (1988) Biochim. Biophys. Acta 935, 9–18.
Creighton, S., Hwang, J.-K., Warshel, A., Parson, W. W., Norris, J., (1988) Biochem. 27, 774–781.
Warwicker, J., Watson, H. C, (1982) J. Mol. Biol. 157, 671–679.
Gilson, M. K., Rashin, A., Fine, R., Honig, B., (1985) J. Mol. Biol. 183, 503–516.
Gilson, M. K., Honig, B., (1988) Proteins 3, 32–52.
Gilson, M. K., Honig, B., (1988) Proteins 4, 7–18.
Warshel, A., Russell, S. T., (1984) Q. Rev. Biophys. 17, 283–422.
Klapper, I., Hagstrom, R., Fine, R., Sharp, K., Honig, B., (1986) Proteins 1, 47–59.
Gilson, M. K., Sharp, K. A., Honig, B. H., (1987) J. Comp. Chem. 9, 327–335.
Nicholls, A., B., H., (1989) manuscript in preperation
Brunger, A. T., Kuriyan, J., Karplus, M., (1987) Science 235, 458–460.
Brooks, B. R., Bruccoleri, R. E., Olafson, B. D., States, D.J., Swaminathan, S., Karplus, M., (1983) J.Comput. Chem 4, 187.
Gilson, M. K., Honig, B., (1986) Biopolymers 25, 2097–2199.
Kassner, R. J., (1972) Proc. Natl. Acad. Sci. USA 69, 2263–2267.
Kassner, R. J., (1973) J. Am. Chem. Soc. 95, 2674–2676.
Churg, A. K., Warshel, A., (1986) Biochemistry 25, 1675–1681.
Dracheva, S. M., Drachev, L. A., Konstantinov, A. A., Semenov, A. Y. S., V.P.,
Arutjunjan, A. M., Shulavlov, V. A., Zaberezhnaya, S. M., (1988) Eur. J. Biochem. 171, 253–264.
Alegria, G., Dutton, P. L., (1988) Biophys. J. 53, 615a.
Nitschke, W., Rutherford, A. W., (1989) Biochemistry 28, 3161–3168.
Bylina, E., Kirmaier, C, McDowell, L, Holten, D., Youvan, D. C, (1988) Nature 336, 182–184.
Schonfeld, M., Montai, M., Feher, G., (1980) Biochem. 19, 1535–1542.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1990 Springer Science+Business Media New York
About this chapter
Cite this chapter
Gunner, M.R., Honig, B. (1990). Electrostatic Analysis of the Midpoints of the Cofactors in the Reaction Center Protein of Rp. viridis . In: Baltscheffsky, M. (eds) Current Research in Photosynthesis. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0511-5_7
Download citation
DOI: https://doi.org/10.1007/978-94-009-0511-5_7
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6716-4
Online ISBN: 978-94-009-0511-5
eBook Packages: Springer Book Archive