Department of Biology, Tokyo Metropolitan University, Minamiohsawa 1-1, Hachioji, 192-03, Tokyo, Japan.
Photosynth Res. 1993 Jun;36(3):185-91. doi: 10.1007/BF00033037.
Nucleotide sequences of the genes coding for the M and cytochrome subunits of the photosynthetic reaction center of Rhodocyclus gelatinosus, a purple bacterium in the β subdivision, were determined. The deduced amino acid sequences of these proteins were compared with those of other photosynthetic bacteria. Based on the homology of these two photosynthetic proteins, Rc. gelatinosus was placed in the α subdivision of purple bacteria, which disagrees with the phylogenetic trees based on 16S rRNA and soluble cytochrome c 2. Horizontal transfer of the genes which code for the photosynthetic apparatus in purple bacteria can be postulated if the phylogenetic trees based on 16S rRNA and soluble cytochrome c 2 reflect the real history of purple bacteria.
测定了β亚群紫细菌胶红杆菌光合反应中心 M 亚基和细胞色素亚基编码基因的核苷酸序列。比较了这些蛋白质的推导氨基酸序列与其他光合细菌的序列。基于这两种光合蛋白的同源性，将胶红杆菌置于紫细菌的α亚群中，如果基于 16S rRNA 和可溶性细胞色素 c2 的系统发育树反映了紫细菌的真实历史，那么可以推测光合器官的基因在紫细菌中发生了水平转移。
