Burning of a narrow spectral hole at 1.7 K in the absorbance band of the primary electron donor of Rhodopseudomonas viridis reaction centers with blocked electron transfer

FEBS Letters

Shkuropatov, A.Ya.¹  Klevanik, A.V.¹  Shuvalov, V.A.¹  Ganago, A.O.¹  Gubanov, V.S.¹ 

[1] Institute of Soil Science and Photosynthesis, USSR Academy of Sciences, Pushchino, Moscow Region 142292, USSR

关键词: Hole burning;    Reaction center;    Electron transfer;    Primary electron donor;    (Rhodopseudomonas viridis);   

DOI  :  10.1016/0014-5793(88)80171-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Burning of spectral holes within the absorption band of the primary electron donor P in reaction centers of Rhodopseudomonas viridis is studied using selective excitation at 1014 nm and 1.7 K. A narrow (≤ 1.0 cm⁻¹) spectral hole with relatively weak electron-phonon and vibronic coupling is burned if the intermediary electron acceptor I is pre-reduced. The hole is broadened up to ∼90–150 cm⁻¹ if I is neutral and the electron-transfer chain is open. Broadening of the hole is discussed in terms of the fast (∼70–110 fs) electron hopping between P* and P⁺BL⁻ (BL, bacteriochlorophyll monomer in L protein subunit).

【 授权许可】

Unknown