Anno2012
AutoriSantabarbara S, Bailleul B, Redding K, Barber J, Rappaport F, Telfer A
AbstractLight-induced electron transfer reactions in the chlorophyll a/d-binding Photosystem I reaction centre of Acaryochloris marina were investigated in whole cells by pump-probe optical spectroscopy with a temporal resolution of ~5ns at room temperature. It is shown that phyllosemiquinone, the secondary electron transfer acceptor anion, is oxidised with bi-phasic kinetics characterised by lifetimes of 88±6ns and 345±10ns. These lifetimes, particularly the former, are significantly slower than those reported for chlorophyll a-binding Photosystem I, which typically range in the 5-30ns and 200-300ns intervals. The possible mechanism of electron transfer reactions in the chlorophyll a/d-binding Photosystem I and the slower oxidation kinetics of the secondary acceptors are discussed
RivistaBiochimica Et Biophysica Acta. Bioenergetics
ISSN0005-2728
Impact factor
Volume1817
Pagina inizio335
Pagina fine328
Autori IBFStefano SANTABARBARA
Linee di Ricerca IBFMD.P01.005.001
Sedi IBFIBF.MI