Electron Transfer, Proton Translocation, and ATP Synthesis in Bacterial Chromatophores
1981; Elsevier BV; Linguagem: Inglês
10.1016/b978-0-12-152512-5.50010-5
ISSN0070-2129
AutoresA. Baccarini-Melandri, Rita Casadio, Bruno Andrea Melandri,
Tópico(s)Spectroscopy and Quantum Chemical Studies
ResumoThis chapter discusses electron transfer, proton translocation, and ATP synthesis in bacterial chromatophores. The study of bacterial photosynthesis, although dealing with a unique process confined to a relatively small group of organisms, offers the possibility of tackling experimentally many of the most critical problems in the field of membrane bioenergetics. This is because of the essentiality of the system, which combines features common to photosynthetic and respiratory electron-transfer apparatuses, that is a photosynthetic reaction center and aubiquinone–cytochromec oxidoreductase complex, and to the experimental advantages that this system offers for the studies of fast steps of oxidoreduction reactions, activated by single-turnover flashes of actinic light. The energy of light, captured by the reaction center and converted into redox energy of a cyclic electron-transfer system, is utilized for the synthesis of ATP by a proton-translocating ATP synthetase, which has many chemical and physical properties common to the ATP synthetase present in other photosynthetic and respiratory membranes
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