Stabilities of iron-sulfur centers and reaction center chlorophyll P-700 in Photosystem I reaction center complex (CP1-a), isolated by sodium dodecyl sulfate treatment from the thermophilic cyanobacterium Synechococcus elongatus, were studied by EPR and optical spectroscopy. P-700 was destroyed by treatment at temperatures above 80°C for 5 minutes with a half inactivation temperature of 93°C. The three iron-sulfur centers FA, FB and FX showed similar thermal stabilities and were half inactivated at about 70°C. Thus, the isolated Photosystem I reaction center complexes of S. elongatus are still highly resistant to heat.
|ジャーナル||Plant and Cell Physiology|
|出版ステータス||Published - 1990|
ASJC Scopus subject areas
- Plant Science
- Cell Biology