Evidence for localisation of accumulated chlorophyll cation on the D1-accessory chlorophyll in the reaction centre of Photosystem II

Absorption and circular dichroism spectra of Photosystem II (PS II) reaction centres (RC) were studied and compared with spectra calculated on the basis of point-dipole approximation. Chlorophyll cation was accumulated during a light treatment of PS II RC in the presence of artificial electron accep...

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Veröffentlicht in:	Photosynthesis research 2005-06, Vol.84 (1-3), p.297-302
Hauptverfasser:	Vacha, F, Psencik, J, Kuty, M, Durchan, M, Siffel, P
Format:	Artikel
Sprache:	eng
Schlagworte:	cations Cations - chemistry Cations - metabolism Chlorophyll Chlorophyll - chemistry Chlorophyll - metabolism Circular Dichroism D1 protein D2 protein Energy Transfer Light Models, Biological peas photosynthetic reaction centers photosystem II Photosystem II Protein Complex - chemistry Photosystem II Protein Complex - metabolism Pisum sativum Pisum sativum - chemistry Pisum sativum - metabolism plant biochemistry Plant Proteins - chemistry Plant Proteins - metabolism spectral analysis Spectrophotometry, Atomic Temperature
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Beschreibung
Zusammenfassung:	Absorption and circular dichroism spectra of Photosystem II (PS II) reaction centres (RC) were studied and compared with spectra calculated on the basis of point-dipole approximation. Chlorophyll cation was accumulated during a light treatment of PS II RC in the presence of artificial electron acceptor silicomolybdate. Light-induced difference spectra and their calculated counterparts revealed the location of accumulated cation at the accessory chlorophyll of the D1 protein subunit.
ISSN:	0166-8595 1573-5079
DOI:	10.1007/s11120-004-6817-2