Reaction centers in lipids (Articolo in rivista)

Type
Label
  • Reaction centers in lipids (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • Márta Dorogi, Francesco Milano, Kornélia Szebényi, György Váró, Livia Giotta, Massimo Trotta, Angela Agostiano, Péter Maróti and László Nagy (2005)
    Reaction centers in lipids
    in Acta biologica Szegediensis (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Márta Dorogi, Francesco Milano, Kornélia Szebényi, György Váró, Livia Giotta, Massimo Trotta, Angela Agostiano, Péter Maróti and László Nagy (literal)
Pagina inizio
  • 195 (literal)
Pagina fine
  • 197 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 49 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 1-2 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Department of Biophysics, University of Szeged CNR Istituto per i Processi Chimico-Fisici, Sez. Bari Institute of Biophysics, Biological Research Center, Hungarian Academy of Sciences, Szeged, Hungary Department of Material Science, Lecce University Department of Chemistry, University of Bari (literal)
Titolo
  • Reaction centers in lipids (literal)
Abstract
  • Specific functional role of physiologically important lipids of the photosynthetic membrane (phosphatidylcholine, cardiolipin and phosphatidylglycerol) was investigated on the thermodynamic and kinetic requirements of the charge movements in bacterial reaction centers. The major effect of these lipids is to increase the stabilization of the separated caharges induced by light excitation during the photosynthetic energy conversion. It can be achieved by (1) changing the redox midpoint potential of the QA/QA- and QB/QB- redox couples, which results in the increase of the free energy gap that drives the QA- to QB electron transfer or (2) by changing the quinone binding/unbinding equilibrium. This study provides evidence that from kinetic point of view the P+QA-QB -> P+QAQB- charge transfer is mainly driven by the change in the enthalpy in LDAO and PC, whereas the entropy contribution is larger if negatively charged lipids are introduced. (literal)
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