Biochimica et Biophysica Acta (BBA) - Bioenergetics
Measurement by a flow dialysis technique of the steady-state proton-motive force in chromatophores from Rhodospirillum rubrum. Comparison with phosphorylation potential
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Cited by (48)
A protet-based, protonic charge transfer model of energy coupling in oxidative and photosynthetic phosphorylation
2021, Advances in Microbial PhysiologyCitation Excerpt :Thus, in chromatophores of Rhodospirillum rubrum, we found a membrane potential of just 100 mV with no pH gradient (nor any effects of the K+/H+ exchanger nigericin), despite the fact that chromatophores can and do make ATP at high rates (Hitchens & Kell, 1982a, 1982b, 1983a, 1983b; Nishimura et al., 1962) and to a high extent (phosphorylation potential) (Kell, Ferguson, & John, 1978). Although at the time (Kell, Ferguson, & John, 1978) we suggested that possibly a high ➔H+/ATP ratio could account for this (and see Petronilli, Pietrobon, Zoratti, & Azzone, 1986), we now recognize (see above and Kell, 1986) that the threshold demonstrably required in ‘acid-bath’-type experiments means that such an explanation is not tenable. Many artificial cations are accumulated by mitochondria (e.g. Battogtokh et al., 2018; Brenner, 1953; Chen et al., 1982, 2019; Cottet-Rousselle, Ronot, Leverve, & Mayol, 2011; Duchen, Surin, & Jacobson, 2003; Emaus, Grunwald, & Lemasters, 1986; Fantin, Berardi, Scorrano, Korsmeyer, & Leder, 2002; Finichiu, James, Larsen, Smith, & Murphy, 2013; Fulda, Galluzzi, & Kroemer, 2010; Johnson, Walsh, & Chen, 1980; Kalyanaraman et al., 2018; Kurtoglu & Lampidis, 2009; Momcilovic et al., 2019; Murphy, 1997, 2008; Nicholls, 2018; Porteous et al., 2010; Rideout, Bustamante, & Patel, 1994; Ross et al., 2005; Šarić et al., 2017; Zielonka et al., 2017), and a common assumption is that this accumulation is driven by a chemiosmotic membrane potential, as per Eq. (6), together with implicit assumptions that such cations pass freely through any bilayer that may be present, and that the binding to it is negligible.
On the dielectric properties of cell suspensions at high volume fractions
1992, Journal of Electroanalytical ChemistryOn the dielectric properties of cell suspensions at high volume fractions
1992, Bioelectrochemistry and Bioenergetics<sup>31</sup>P-NMR studies of photophosphorylation in chromatophores from Chromatium vinosum
1989, BBA - Molecular Cell ResearchTransport of Carbohydrates into Cyanobacteria
1988, Methods in Enzymology