Artículo
An evolutionary analysis of the reaction mechanisms of photosystem I reduction by cytochrome c6 and plastocyanin
Autor/es | Rosa Acosta, Miguel Ángel de la
Navarro Carruesco, José Antonio Díaz Quintana, Antonio Jesús Cerda Haynes, Berta de la Molina Heredia, Fernando Publio Balme, Alexis Murdoch, Piedad del Socorro Díaz Moreno, Irene Durán Díaz, Raúl V. Hervás Morón, Manuel |
Departamento | Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular |
Fecha de publicación | 2002 |
Fecha de depósito | 2019-03-29 |
Publicado en |
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Resumen | Photosystem I reduction by the soluble metalloproteins cytochrome c6 and plastocyanin, which are alternatively synthesized by some photosynthetic organisms depending on the relative availability of copper and iron, has ... Photosystem I reduction by the soluble metalloproteins cytochrome c6 and plastocyanin, which are alternatively synthesized by some photosynthetic organisms depending on the relative availability of copper and iron, has been investigated in cyanobacteria, green algae and plants. The reaction mechanism is classified in three different types on the basis of the affinity of the membrane complex towards its electron donor protein. The role of electrostatic interactions in forming an intermediate transient complex, as well as the structural and functional similarities of cytochrome c6 and plastocyanin are analysed from an evolutionary point of view. The proposal made is that the heme protein was first “discovered” by nature, when iron was much more abundant on the Earth's surface, and replaced by plastocyanin when copper became available because of the oxidizing conditions of the new atmosphere. |
Identificador del proyecto | ERB-FMRX-CT98-0218
HPRN-CT1999-00095 BMC2000-0444 PAI CVI-0198 |
Cita | Rosa Acosta, M.Á.d.l., Navarro Carruesco, J.A., Díaz Quintana, A.J., Cerda Haynes, B.d.l., Molina Heredia, F.P., Balme, A.,...,Hervás Morón, M. (2002). An evolutionary analysis of the reaction mechanisms of photosystem I reduction by cytochrome c6 and plastocyanin. Bioelectrochemistry, 55 (1-2), 41-45. |
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