Abstract
Data are presented which suggest that photosystem II dependent hydrogen ion accumulation and ATP synthesis can occur only after the lamellar membranes have undergone a conformational change. This membrane conformational change is detected by the electron transport dependent incorporation of diazonium benzene[35S]sulfonate into membrane components. Previously it was established that electron flux from the photosystem II primary acceptor to plastoquinone is a necessary event for the occurrence of the diazonium-detected conformational change. These studies indicate that the release of hydrogen ions during photosystem II oxidation of the primary reductant is also a necessary event for the diazonium-detected conformational change. When iodide ions were substituted for water (or other proton-releasing donors) as the primary reductant of system II the conformational change did not occur even though a substantial rate of electron flow from the primary acceptor to plastoquinone occurred.
Original language | English (US) |
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Pages (from-to) | 4392-4396 |
Number of pages | 5 |
Journal | Biochemistry |
Volume | 14 |
Issue number | 20 |
DOIs | |
State | Published - Oct 1 1975 |
Externally published | Yes |
ASJC Scopus subject areas
- Biochemistry