Exciton levels structure of antenna bacteriochlorophyll c aggregates in the green bacterium Chloroflexus aurantiacus as probed by 1.8–293 K fluorescence spectroscopy

FEBS Letters

Mauring, K.²  Novoderezhkin, V.¹  Taisova, A.¹  Fetisova, Z.¹ 

[1] Moscow State University, Belozersky Inst. of Phys-Chem. Biol., Building A, 119899 Moscow, Russia;Institute of Physics, Est. Acad. Sci., 202400 Tartu, Estonia

关键词: Bacterial photosynthesis;    Antenna pigment organization;    Bacteriochlorophyll c;    Green bacterium;    BChl;    bacteriochlorophyll;    ZPH;    zero phonon hole;   

DOI  :  10.1016/S0014-5793(99)00953-9

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

We have demonstrated temperature-dependence of the steady-state fluorescence lineshape of the bacteriochlorophyll (BChl) c band measured for intact cells of the green bacterium Chloroflexus aurantiacus over the 1.8–293 K range. The measured temperature-dependence has been shown to be in good agreement with the theoretical one, calculated for our original model of pigment organization in the chlorosomal oligomeric antenna of green photosynthetic bacteria based on spectral hole-burning studies (Fetisova, Z.G. et al. (1996) Biophys. J. 71, 995–1010). This model implies that the BChl c antenna unit is a tubular aggregate of six exciton-coupled linear pigment chains having the exciton level structure with strongly allowed higher levels.

【 授权许可】

Unknown