doi:

DOI: 10.3724/SP.J.1145.2011.00138

Chinese Journal of Appplied Environmental Biology (应用与环境生物学报) 2011/17:1 PP.138-143

Molecular Mechanism of Solar Energy Harvesting by Purple Photosynthetic Bacteria*


Abstract:
Photosynthesis is arguably the most important biological process, biology harvests solar energy and transfers it into chemical energy for the growth and reproduction of organisms. The photosynthetic bacteria were the earliest microbe with photosynthesis being found on earth. The photosynthetic apparatus of purple bacteria is a nanometric assembly in the intracytoplasmic membranes and consists of pigment-protein complexes, the photosynthetic RC (Reaction center) and LH (Light harvesting). The primary processes of photosynthesis involve absorption of photons by LH complexes, transfer of excitation energy from the LH complexes to the photosynthetic RC, where the primary energy conversion takes place. The researches on molecular structure and mechanism of purple photosynthetic bacteria harvesting solar energy were summarized. Molecular biology techniques and spectroscopic analysis were applied to research the expression and function of puc2BA and pucsBA by the authors, it was concluded that the puc2BA gene was normally expressed and functional in Rhodobacter sphaeroides, the pucsBA gene of Rhodovulum sulfidophilum and the pufBA gene of Rhodobacter sphaeroides were expressed in Rhodobacter sphaeroides, the heterologous LHII and native LHI were produced and assembled in the membrane. Fig 3, Ref 48

Key words:purple photosynthetic bacteria,solar energy,light-harvesting protein,molecular mechanism

ReleaseDate:2014-07-21 15:54:05

Funds:Supported by the “863” Program of the Ministry of Science and Technology of China (No. 2006AA02Z138), the National Natural Science Foundation of China (Nos. 30600044,30771464), and the Natural Science Foundation of Chongqing, China (Nos. 2006BB1193, 2007BB5414)



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