Abstract
Excitation migration in the light-harvesting bacteriochlorophyll complexes LH1 and LH2 of purple bacteria has been studied in many experimental and theoretical works. According to the widely accepted notions, it proceeds along the descending energy stairway, B800* → 850* → 875* → P870*, where symbol * stands for excitations in the corresponding BChl fraction. In this paper we demonstrate the existence of one more way of direct excitation delivery from B800 to B875, bypassing the main route via B850. The comparative modeling enables the estimation of the mean portion of excitation that uses this minor migration way. In some real cases it may reach 9–9.5%. The values of the critical distances for excitation migration from B800 to B850 and from B800 to B875, as well as their values for arbitrary spectral shifts in BChl molecules, are determined.
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Abbreviations
- BChl:
-
bacteriochlorophyll
- RC:
-
reaction center
References
Borisov, A.Y., Transfer of Excitation Energy in Photosynthesis. Some Thoughts, Photosynth. Res., 1989, vol. 20, pp. 35–58.
Robert, B., Cogdell, R., and van Grondelle, R., Light-Harvesting Antennas in Photosynthesis, The Light-Harvesting System of Purple Bacteria, Green, B.R. and Parson, W.W., Eds., The Netherlands, Kluwer Acad. Publ., 2003, pp. 170–194.
Brunisholz, R.A.and Zuber, H., Primary Structural Analysis of Bacterial Antenna Polypeptides., J. Photochem. Photobiol., 1992, vol. 15, pp. 113–140.
McDermot, G., Prince, S.M., Freer, A.A., Hawthornthwaite-Lawless, A.M., Papiz, M.S., Cogdell, R.J., and Isaaks, N.W., Crystal Structure of an Integral Membrane Light-Harvesting Complex from Photosynthetic Bacteria, Nature, 1995, vol. 374, pp. 517–521.
Koepke, J., Hu, X., Muenke, C., Schulten, K., and Michel, H., The Crystal Structure of the Light-Harvesting Complex B800–B850 from Rhodospirillum molishianum, Structure, 1996, vol. 4, pp. 591–597.
Papiz, M.Z., Prince, S.M., Howard, T., Cogdell, R.J., and Isaaks, N.W., A Model for Photosynthretic Apparatus for Purple Bacteria, J. Mol. Biol., 2003, vol. 326, pp. 1523–1538.
Borisov, A.Y. and Vinogradov, A.V., Modeling of Picosecond Processes of Bacterial Photosynthesis, Biol. Membr., 1992, vol. 6, pp. 569–585.
Förster, T.H., Intermolecular Energy Transfer and Fluorescence, Naturwissenschaften, 1948, vol. 6, pp. 166–175.
Agranowich, M.V. and Galanin, M.D., Excitation Transfer in Condensed Matter, Modern Problems in Condensed Matter Science, vol. 3, The Netherlands, Amsterdam, North-Holland Publ. Co., 1982.
Einstein, A., Phys. Zeit, 1917, vol. 18, pp. 121–127.
Zankel, K.N., Reed, D.W., and Clayton, R.K., Effect of Redox Potential on P870 Fluorescence in Reaction Centers, Proc. Natl. Acad. Sci. USA, 1968, vol. 61, pp. 1243–1249.
Campillo, A.J., Hyer, R.C., Monger, T.G., Parson, W.W., and Shapiro, S.L., Light Collection and Harvesting Processes in Bacterial Photosynthesis Investigated on a Picosecond Time Scale, Proc. Natl. Acad. Sci. USA, 1977, vol. 74, pp. 1997–2001.
Connolly, J.S., Samuel, E.B., and Janzen, A.F., Effects of Solvents on Optical Properties of Bacteriochlorophyll-A, Photochem. Photobiol., 1982, vol. 36, pp. 565–574.
Borisov, A.Y., The Discrepancy between Experimental and Theoretical Excitation Transfer Rates in LH2 Bacteriochlorophyll-Protein Complexes of Purple Bacteria, Eur. Biophys J., 2008, vol. 37, no. 2, pp. 443–451.
Bahatyreva, S., Frese, R.N., Seibert, C.A., Olsen, J.D., van der Wert, K.O., van Grondelle, R., Niederman, R.A., Bullough, P.A., Otto, C., and Hunter, C.N., Flexibility and Size Heterogeneity of the LH1 Light-Harvesting Complex Revealed by Atomic Force Microscopy: Functional Significance for Bacterial Photosynthesis, J. Biol. Chem., 2004, vol. 279, pp. 21327–21333.
Kramer, H.J.M., van Grondelle, R., Hunter, C.N., Westerhuis, W., and Amesz, J., Pigment Organization of B800-850 Antenna Complex of Rhodopseudomonas sphaeroides, Biochim. Biophys. Acta, 1984, vol. 765, pp. 156–165.
van Grondelle, R. and Somsen, O.J.G., Resonance Energy Transfer, Andrews, D.L. and Demidov, A.A., Eds., Chichester, New York, Brisbein, Singapore, Toronto, John Wiley and Sons, 1999, pp. 366–391.
Godik, V.I. and Borisov, A.Y., Excitation Trapping by Different States of Reaction Centers, FEBS Lett., 1977, vol. 82, no. 3, pp. 355–358.
Shuvalov, V.A., Preobrazovanie solnechnoi energii v pervichnom akte razdelenia zariadov v reaktsionoom tsentre fotosinteza (Solar Energy Conversion in the Primary Act of Charge Separation in Photosynthetic Reaction Centers), Moscow, Nauka, 2000.
Rutkauskas, D.V., Novoderejkin, V.I., Cogdell, R.J., and van Grondelle, R., Fluorescence Spatial Fluctuations of Single LH2 Complexes, Biochemistry, 2004, vol. 43, pp. 4431–4438.
Borisov, A.Y., Discrepancy between Experimental and Theoretical Excitation Transfer Rates in LH2 Bchl-Protein Complexes of Purple Bacteria, Eur. Biophys. J., 2008, vol. 37, no. 3, pp. 443–451.
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Original Russian Text © A.Y. Borisov, A.P. Gaydukova, 2009, published in Biologicheskie Membrany, 2009, Vol. 26, No. 5, pp. 370–378.
The article was translated by the authors.
The numerals in designations of BChl fractions B800, B850, B875, and B870 correspond to approximate positions of absorption peaks.
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Borisov, A.Y., Gaydukova, A.P. Quantum efficiency of the minor channel for excitation migration from B800 to B875 bacteriochlorophyll fractions in purple bacteria. Biochem. Moscow Suppl. Ser. A 3, 488–495 (2009). https://doi.org/10.1134/S1990747809040175
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DOI: https://doi.org/10.1134/S1990747809040175