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Plant and Cell Physiology, 1996, Vol. 37, No. 6 889-893
© 1996

Rapid Report

Discovery of Natural Photosynthesis using Zn-Containing Bacteriochlorophyll in an Aerobic Bacterium Acidiphilium rubrum

Norio Wakao1,8, Naoto Yokoi1, Naohito Isoyama1, Akira Hiraishi2,7, Keizo Shimada3, Masami Kobayashi4, Hideo Kise4, Masayo Iwaki5, Shigeru Itoh5,8 and Shinichi Takaichi6

1Laboratory of Applied Microbiology Iwate University, Morioka, 020 Japan
2Laboratory of Environmental Biotechnology Konishi Co., Tokyo, 130 Japan
3Department of Biology, Tokyo Metropolitan University Tokyo, 192-03 Japan
4Institute of Materials Science, University of Tsukuba Tsukuba, 305 Japan
5National Institute for Basic Biology Okazaki, 444 Japan
6Biological Laboratory, Nippon Medical School Kawasaki, 211 Japan

8To whom correspondence should be addressed.

We discovered natural photosynthesis using Zn-containing bacteriochlorophyll {alpha} in an acidophilic bacterium Acidiphilium rubrum. Chemical analysis of the cell extracts gave a 13 : 2 :1 molar ratio of Zn-bacteriochlorophyll {alpha} : Mg-bacteriochlorophyll {alpha} : bacteriopheophytin {alpha}. Most of the pigments are associated with fully active reaction center and light-harvesting complexes analogous to those in purple photosynthetic bacteria. The finding indicates an unexpectedly wide variability of photosynthesis.

7Present address: Department of Ecological Engineering, Toyohashi University of Technology, Tenpaku-cho, Toyohashi, 441 Japan

(Received July 19, 1996; Accepted July 26, 1996)
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