电子隧穿过程与大分子的链段迁移率
Electron tunneling process and the segment mobility of macromolecules.
作者信息
Chernavskii D S, Frolov E N, Goldanskii V I, Kononenko A A, Rubin A B
出版信息
Proc Natl Acad Sci U S A. 1980 Dec;77(12):7218-21. doi: 10.1073/pnas.77.12.7218.
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.
新的实验数据[伯格，A. I.，诺克斯，P. P.，科诺年科，A. A.，弗罗洛夫，E. N.，赫里莫娃，I. N.，鲁宾，A. B.，利希滕斯坦，G. I.，戈尔丹斯基，V. I.，帕拉克，F.，布克尔，M. & 穆斯堡尔，R.（1979年）《分子生物学（苏联）》13卷，81 - 89页；伯格，A. I.，诺克斯，P. P.，科诺年科，A. A.，弗罗洛夫，E. N.，乌斯彭斯卡娅，N. Y.，赫里莫娃，I. N.，鲁宾，A. B.，利希滕斯坦，G. I. & 希德格，K.（1979年）《分子生物学（苏联）》13卷，469 - 477页]提供了证据，表明电子隧穿过程与光合膜中蛋白质大分子的一种特殊类型的构象转变（片段转变）有关。用一个简单的力学模型对这个问题进行了研究。结果表明，片段自由度可以在电子隧穿过程中起到强相互作用的接受模式的作用。计算了电子隧穿速率以及膜结合的57Fe的无反冲γ射线吸收（作为分子内流动性的指标）的温度依赖性。还讨论了蛋白质中的能量储存问题。
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