Purification and characterization of oxygen-evolving photosystem II core complexes from the green alga Chlamydomonas reinhardtii.
Oxygen-evolving photosystem II complexes were isolated from the green alga Chlamydomonas reinhardtii by selective solubilization of thylakoid membranes with dodecyl maltoside followed by density gradient centrifugation and anion-exchange chromatography. In the presence of CaCl2 and K3[Fe(CN)6] the complexes evolved oxygen at rates exceeding 1000 mumol (mg of chl)-1 h-1. The particles contained 40 chlorophylls a and had properties very similar to those of PSII isolated from higher plants. Chlamydomonas reinhardtii is now the first organism which can be used for both site-directed mutagenesis and detailed biochemical and biophysical characterization of oxygen-evolving photosystem II. It seems therefore to be an ideal model organism for investigation of structure-function relationships in photosynthetic oxygen evolution.[1]References
- Purification and characterization of oxygen-evolving photosystem II core complexes from the green alga Chlamydomonas reinhardtii. Bumann, D., Oesterhelt, D. Biochemistry (1994) [Pubmed]
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