Investigation of spatial relationships and energy transfer between complexes B800‐850 and B890‐RC from Chromatium minutissimum reconstituted into liposomes

FEBS Letters

Timpmann, Kou¹  Moskalenko, Andrey A.³  Godik, Valentina I.²  Toropygina, Olga³  Freiberg, Arvi¹ 

[1] Institute of Physics, Estonian Academy of Sciences, 202400 Tarta, Estonia;A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, 119899 Moscow, Russia;Institute of Soil Scienice and Photosynthesis, Russian Academy of Science, 142292 Puschino, Russia

关键词: Chromatium minutissimum;    Pigment-protein complex: liposome: Chemical cross-linking;    Excitation transfer;    Picosecond kinetics;    LHC;    light-harvesting complex;    RC;    reaction center;    C;    Chromatium;    BChl;    bacteriochlorophyll;    DSP;    dithiobissuccinimidyl propionate;   

DOI  :  10.1016/0014-5793(92)81260-S

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Spatial relationships between difterent pigment-protein complexes in the membranes of the purple photosynthetic bacterium, Chromatium minutissimum, have been studied. The possibility of restoring the function of efficient excitation energy transfer from bacteriochlorephyll molecules to the reaction centers in the system of soybean liposomes, reconstituted with pigment-protein complexes B800-850 and B890-RC from C. minutissimum, has been explored. The chemical cross-linking method, together with stationary and picosecond spectrally resolved fluoresence measurements were employed. It has been shown that after the incorporation of the complexes into the liposame membranes conditions for directed excitation energy transfer from the light-harvesting pigments to the reaction centers are created, which are less optimal, however, than those in the native state. Possible reasons are considered.

【 授权许可】

Unknown