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An oxygen‐evolving complex with a simple subunit structure ‐ ‘a water‐plastoquinone oxidoreductase” ‐ from the thermophilic cyanobacterium Synechococcus sp.
Author(s) -
Satoh Kazuhiko,
Ohno Takashi,
Katoh Sakae
Publication year - 1985
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(85)81096-6
Subject(s) - thermophile , plastoquinone , cyanobacteria , synechococcus , photosynthesis , oxygen , polyacrylamide gel electrophoresis , oxidoreductase , oxygen evolution , protein subunit , biochemistry , chemistry , photosystem ii , biology , thylakoid , chloroplast , bacteria , enzyme , genetics , organic chemistry , electrode , electrochemistry , gene
An oxygen‐evolving complex has been highly purified from the thermophilic cyanobacterium Synechococcus sp. The complex, which reproducibly showed 5 major polypeptide bands of 47, 40, 35, 30 and 9 kDa on SDS‐polyacrylamide gel electrophoresis and contained 3.2 Mn per Q A , had an oxygen‐evolving activity of 300–400 chl per h in the presence of 5 mM MnCl 2 ; or CaCl 2 . The complex most likely represents a minimum functional unit of the photosynthetic oxygen evolution.