Energy Transduction in Biological Membranes
A Textbook of Bioenergetics
Chapter
Starting with a discussion of the dependence of the activation energy of electron transport on reorganization energy, conclusions that apply to charge transfer in photosynthetic membrane proteins are: (i) a re...
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Chapter
It was shown in Chap. 1 that a free energy change ΔG p,T can be associated with a change of electrical potential. In the present case, we consider the application to oxidation-...
Chapter
Cytochromes a—d were classified on the basis of characteristic absorbance maxima (Keilin and Keilin, 1966). The heme can be attached to the protein noncovalently (cytochromes a, b, and d) or covalently (cytochrom...
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Most of the chlorophyll or bacteriochlorophyll molecules in the photosynthetic organelle serve as an antenna for light gathering. Approximately one chlorophyll molecule out of 500, and one bacteriochlorophyll ...
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Proton pum** ATPases can be divided into three classes (Pedersen and Carafoli, 1987a,b; Nelson, 1988): (1) The eubacterial “F-type” that is present in bacteria such as E. coli, mitochondria, and chloroplasts, d...
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Thermodynamics describes physical and chemical phenomena in terms of macroscopic properties of matter that are obvious to our senses such as pressure, temperature, and volume. These phenomena are divided into ...
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Chloroplasts, mitochondria, and Gram-negative bacteria all share the property of being bounded by a pair of membranes (Keegstra et al, 1984). The two membranes differ in passive permeability properties, the ou...
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The concept that the long-chain quinones in energy-transducing membranes (Fig. 5.1 A and B) act as mobile carriers of electrons and protons is partly based on the high concentration of quinone in all energy-tr...
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Two mechanisms of H+ translocation have been discussed thus far, the uptake and release of H+ by ubi- and plastoquinone (Chap. 5), and the release of H+ in the photosynthetic water splitting reaction (Chap. 6.8)....
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All living organisms must exchange material with the surrounding environment across their cell membranes, exporting waste materials and importing useful metabolites. The transport of such materials is catalyze...
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The dependence of colicin channel activity on membrane potential and peptide concentration was studied in large unilamellar vesicles using colicin E1, its COOH-terminal thermolytic peptide and other channel-fo...
Chapter
The cytochrome b/c 1 complex (ubiquinol: cytochrome c oxidoreductase) and the cytochrome b 6 /f complex (plastoquinol:plastocyanin oxidoreductase) occur in energy transdu...
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It is well-known that the functional activity of proteins can be altered by post-translational modification, perhaps most notably by reversible phosphorylation (1,2). One such modification is the incorporation...
Chapter
The amino acid sequences and distribution of hydrophobic amino acids have been compared (1–3) for the b cytochromes from seven mitochondrial sources (A. nidulans. yeast, trypanosomes, maize, mouse, bovine, and hu...
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The gene for cytochromeb-559, associated with the photosystem II reaction center, has been located on the spinach plastid chromosome by cell-free coupled transcription-translation and RNA-programmed hybrid select...
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