title: Unique photosystems in Acaryochloris marina.
abstract: A short overview is given on the discovery of the chlorophyll d-dominated cyanobacterium Acaryochloris marina and the minor pigments that function as key components therein. In photosystem I, chlorophyll d', chlorophyll a, and phylloquinone function as the primary electron donor, the primary electron acceptor and the secondary electron acceptor, respectively. In photosystem II, pheophytin a serves as the primary electron acceptor. The oxidation potential of chlorophyll d was higher than that of chlorophyll a in vitro, while the oxidation potential of P740 was almost the same as that of P700. These results help us to broaden our view on the questions about the unique photosystems in Acaryochloris marina.
authors.affiliation: Institute of Materials Science, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Ohashi
authors.forename: Hideaki
authors.initials: H
authors.lastname: Miyashita
authors.forename: Naoki
authors.initials: N
authors.lastname: Okada
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Iemura
authors.forename: Tadashi
authors.initials: T
authors.lastname: Watanabe
authors.forename: Masami
authors.initials: M
authors.lastname: Kobayashi
mesh_terms: D002734:Chlorophyll / Q000378:metabolism; D000458:Cyanobacteria / Q000378:metabolism*; D010788:Photosynthesis; D045322:Photosynthetic Reaction Center Complex Proteins / Q000378:metabolism*
chemical_list: D045322:Photosynthetic Reaction Center Complex Proteins; D002734:Chlorophyll