Abstract
The iron-sulfur protein of the cytochromebc 1 complex oxidizes ubiquinol at center P in the protonmotive Q cycle mechanism, transferring one electron to cytochromec 1 and generating a low-potential ubisemiquinone anion which reduces the low-potential cytochromeb-566 heme group. In order to catalyze this divergent transfer of two reducing equivalents from ubiquinol, the iron-sulfur protein must be structurally integrated into the cytochromebc 1 complex in a manner which facilitates electron transfer from the iron-sulfur cluster to cytochromec 1 and generates a strongly reducing ubisemiquinone anion radical which is proximal to theb-566 heme group. This radical must also be sequestered from spurious reactivities with oxygen and other high-potential oxidants. Experimental approaches are described which are aimed at understanding how the iron-sulfur protein is inserted into center P, and how the iron-sulfur cluster is inserted into the apoprotein.
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Beckmann, J. D., Ljungdahl, P. O., Lopez, J. L., and Trumpower, B. L. (1987).J. Biol. Chem. 262, 8901–8909.
Beckmann, J. D., Ljungdahl, P. O., and Trumpower, B. L. (1989).J. Biol. Chem. 264, 3713–3722.
Bowyer, J. R., and Trumpower, B. L. (1981).J. Biol. Chem. 256, 2245–2251.
Bowyer, J. R., Edwards, C. A., and Trumpower, B. L. (1981).FEBS Lett. 126, 93–97.
Brandt, U., Schägger, H., and Von Jagow, G. (1988).Eur. J. Biochem. 173, 499–506.
Brandt, U., Yu, L., Yu, C.-A., Trumpower, B. L. (1993).J. Biol. Chem. 268, 8387–8390.
Britt, R. D., Sauer, K., Klein, M. P., Knaff, D. B., Kriauciunas, A., Yu, C. A., Yu, L., and Malkin, R. (1991).Biochemistry 30, 1892–1901.
Cheng, M. Y., Hartl, F. U., Martin, J., Pollock, R. A., Kalousek, F., Neupert, W., Hallberg, E. M., Hallberg, R. I., and Horwich, A. L. (1989).Nature (London) 337, 620–625.
Davidson, E., and Daldal, F. (1987).J. Mol. Biol. 195, 13–24.
Davidson, E., Ohnishi, T., Atta-Asafo-Adjei, E., Daldal, F. (1992).Biochemistry 31, 3342–3351.
Edwards, C. A., Bowyer, J. R., and Trumpower, B. L. (1982).J. Biol. Chem. 257, 3705–3713.
Graham, L., and Trumpower, B. L. (1991).J. Biol. Chem. 266, 22485–22492.
Graham, L. A., Phillips, J. D., and Trumpower, B. L. (1992).FEBS Lett. 313, 251–254.
Gurbiel, R. J., Batie, C. J., Sivaraja, M., True, A. E., Fee, J. A., Hoffman, B. M., and Ballou, D. P. (1989).Biochemistry 28, 4861–4871.
Harnisch, U., Weiss, H., and Sebald, W. (1985).Eur. J. Biochem. 149, 95–99.
Hartl, F. U., Schmidt, B., Wachter, E., Weiss, H., and Neupert, W. (1986).Cell 47, 939–951.
Hendrick, J. P., Hodges, P. E., and Rosenberg, L. I. (1989).Proc. Natl. Acad. Sci. USAS 86, 4056–4060.
Huang, J., Struck, F., Matzinger, D. F., and Levings, C. S. (1991).Proc. Natl. Acad. Sci. USA 88, 10716–10720.
Japa, S., and Beattie, D. S. (1989).Arch. Biochem. Biophys. 268, 716–720.
Kallas, T., Spiller, S., and Malkin, R. (1989).Proc. Natl. Acad. Sci. USA 85, 5794–5798.
Kuila, D., Fee, J. A., Schoonover, J. R., Woodruff, W. H., Batie, C. J., and Ballou, D. P. (1987).J. Am. Chem. Soc. 109, 1559–1561.
Kurowski, B., and Ludwig, B. (1987).J. Biol. Chem. 262, 13805–13811.
Ljungdahl, P. O., Beckmann, J. D., and Trumpower, B. L. (1989).J. Biol. Chem. 264, 3723–3731.
Majewski, C., and Trebst, A. (1990).Mol. Gen. Genet. 224, 373–382.
Nishikimi, M., Hosokawa, Y., Toda, H., Suzuki, H., and Ozawa, T. (1989).Biochem. Biophys. Res. Commun. 159, 19–25.
Nishikimi, M., Hosokawa, Y., Toda, H., Suzuki, H., and Ozawa, T. (1990).Biochem. Int. 20, 155–160.
Phillips, J. D., Schmitt, M. E., Brown, T. A., Beckmann, J. D., and Trumpower, B. L. (1990).J. Biol. Chem. 265, 20813–20821.
Rich, P. R. (1983).Biochim. Biophys. Acta 722, 271–280.
Rieske, J. S. (1976).Biochim. Biophys. Acta 456, 195–247.
Rieske, J. S., Baum, H., Stoner, C. D., and Lipton, S. HJ. (1967).J. Biol. Chem. 242, 4854–4866.
Schägger, H., Borchart, U., Machleidt, W., Link, T. A., and Von Jagow, G. (1987).FEBS Lett. 219, 161–168.
Steppuhn, J., Rother, C., Hermans, J., Jansen, T., Salnikow, J., Hauska, G., and Hermann, R. G. (1987).Mol. Gen. Genet. 210, 171–177.
Thoeny-Meyer, L., Stax, D., and Hennecke, H. (1989).Cell 57, 683–697.
Trumpower, B. L. (1981).Biochim. Biophys. Acta 639, 129–155.
Trumpower, B. L. (1990a).Microbiol. Rev. 54, 102–129.
Trumpower, B. L. (1990b).J. Biol. Chem. 265, 11409–11412.
Usui, S., Yu, L., and Yu, C. A. (1990).Biochem. Biophys. Res. Commun. 167, 575–579.
Verbist, J., Lang, F., Gabellini, N., and Oesterhelt, D. (1989).Mol. Gen. Genet. 219, 445–452.
Widger, W. R., GenBank Accession No. M74514.
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Graham, L.A., Brandt, U., Sargent, J.S. et al. Mutational analysis of assembly and function of the iron-sulfur protein of the cytochromebc 1 complex inSaccharomyces cerevisiae . J Bioenerg Biomembr 25, 245–257 (1993). https://doi.org/10.1007/BF00762586
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DOI: https://doi.org/10.1007/BF00762586