Abstract
New experimental data [Berg, A. I., Noks, P. P., Kononenko, A. A., Frolov, E. N., Khrymova, I. N., Rubin A. B., Likhtenstein, G. I., Goldanskii, V. I., Parak, F., Bukl, M. & Mössbauer, R. (1979) Mol. Biol. (USSR) 13, 81-89; Berg, A. I., Noks, P. P., Kononenko, A. A., Frolov, E. N., Uspenskaya, N. Y., Khrymova, I. N., Rubin, A. B., Likhtenstein, G. I. & Hideg, K. (1979) Mol. Biol (USSR) 13, 469-477] provide evidence that the electron tunneling process is connected to a special type of conformational transition (segmental transition) protein macromolecules in photosynthetic membranes. This problem is investigated with a simple mechanical model. It is shown that the segmental degree of freedom can play the role of the strongly interacting accepting mode for the electron tunneling process. The temperature dependences of the electron tunneling rate and the recoilless gamma-ray absorption of membrane-bound 57Fe, as an indicator of the intramolecular mobility, are calculated. The problem of energy storage in proteins is also discussed.
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Selected References
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- Blumenfeld L. A., Chernavskii D. S. Tunnelling of electrons in biological processes. J Theor Biol. 1973 Apr;39(1):1–7. doi: 10.1016/0022-5193(73)90201-4. [DOI] [PubMed] [Google Scholar]
- Blumenfeld L. A. The physical aspects of energy transduction in biological systems. Q Rev Biophys. 1978 Aug;11(3):251–308. doi: 10.1017/s0033583500002286. [DOI] [PubMed] [Google Scholar]
- Cartling B., Ehrenberg A. A molecular mechanism of the energetic coupling of a sequence of electron transfer reactions to endergonic reactions. Biophys J. 1978 Sep;23(3):451–461. doi: 10.1016/S0006-3495(78)85461-7. [DOI] [PMC free article] [PubMed] [Google Scholar]
- DeVault D., Chance B. Studies of photosynthesis using a pulsed laser. I. Temperature dependence of cytochrome oxidation rate in chromatium. Evidence for tunneling. Biophys J. 1966 Nov;6(6):825–847. doi: 10.1016/s0006-3495(66)86698-5. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Grigorov L. N., Chernavskii D. S. Kvantovo-mekhanicheskaia model' perenosa élektrona ot tsitokhroma k khlorofillu v fotosinteze. Biofizika. 1972 Mar-Apr;17(2):195–202. [PubMed] [Google Scholar]
- Hales B. J. Temperature dependency of the rate of electron transport as a monitor of protein motion. Biophys J. 1976 May;16(5):471–480. doi: 10.1016/S0006-3495(76)85702-5. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hopfield J. J. Electron transfer between biological molecules by thermally activated tunneling. Proc Natl Acad Sci U S A. 1974 Sep;71(9):3640–3644. doi: 10.1073/pnas.71.9.3640. [DOI] [PMC free article] [PubMed] [Google Scholar]
- McCammon J. A., Wolynes P. G., Karplus M. Picosecond dynamics of tyrosine side chains in proteins. Biochemistry. 1979 Mar 20;18(6):927–942. doi: 10.1021/bi00573a001. [DOI] [PubMed] [Google Scholar]