A theoretical model for electron transport through chlorophyll-containing bileaflet membranes

Ilani, Asher; Berns, Donald S.

doi:10.1007/bf01184686

Cited by 24 publications

(31 citation statements)

References 14 publications

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“…An electronic process as opposed to an ionic one has been proposed to explain the photoelectric effect of the chloroplast extract membranes (9,11,14,22). One proposal for the electronic process (14) considers in detail the nature of both the interfacial electron transfer process and the transmembrane movement (15) of the electron.…”

Section: Resultsmentioning

confidence: 99%

“…The major problem in the use of these membranes as models is that, in general, the photoelectric effect simply represents a dissipation of a preexisting electrochemical gradient. Ideally, model membrane processes involving electron flow across the membrane should lead to storage of some of the quantal energy absorbed by the membrane in the form of a chemical redox potential.The use of an extrinsic protein to modify the photoelectric behavior of chloroplast extract membranes (11,14) in a manner similar to the energy storage qualities of photosynthesis and solar energy cells has been reported. The purpose of this investigation is to present experiments with a number of biliproteins to expand the original observations and to demonstrate the specific electron-directing properties of these proteins.…”

mentioning

confidence: 99%

“…Photoelectric effects of bilayer lipid membranes (BLM) have been a subject of increasing interest in recent years (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15). Such membranes containing the appropriate pigments are photosensitive if a gradient in redox potential, pH, or electric potential is created across the membrane (10).…”

mentioning

confidence: 99%

“…The use of an extrinsic protein to modify the photoelectric behavior of chloroplast extract membranes (11,14) in a manner similar to the energy storage qualities of photosynthesis and solar energy cells has been reported. The purpose of this investigation is to present experiments with a number of biliproteins to expand the original observations and to demonstrate the specific electron-directing properties of these proteins.…”

mentioning

confidence: 99%

“…These biliproteins are the accessory pigments involved in energy transfer during photosynthesis (19). The function of C-phycocyanin as an electrondirecting agent in transmembrane migration of electrons has been studied (11,14). Chroomonas phycocyanin from Cryptophycean algae is distinctly different from C-phycocyanin in its aggregation properties, spectral characteristics, and cellular location, but apparently performs the same energy transfer function (18,20).…”

mentioning

confidence: 99%

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Modification of intensity and direction of electron flow across bileaflet membranes.

Chen¹,

Berns²

1975

Proc. Natl. Acad. Sci. U.S.A.

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The intensity and the direction of electron flow across chloroplast extract bilayer membranes are modified by the presence of biliproteins. Biliproteins including C-phycocyanin, phycoerythrin, aliophycocyanin, and Chroomonas phycocyanin enhance the photosensitivity of the membranes. The photoelectric spectra of the membranes in the presence of biliproteins correlate with the absorption spectra of these biliproteins. Experiments are presented to demonstrate the specific character of the electron-directing ability of biliproteins. A possible mechanism involving the interaction between the biliproteins and the membranes is proposed.Photoelectric effects of bilayer lipid membranes (BLM) have been a subject of increasing interest in recent years (1-15). Such membranes containing the appropriate pigments are photosensitive if a gradient in redox potential, pH, or electric potential is created across the membrane (10). The photoelectric spectrum of BLM has been correlated with the absorption spectrum of the pigment in the membrane-forming solution (7).Studies of membranes containing photosynthetic pigments, such as chlorophyll and ,8-carotene (5, 9, 15), chlorophyll and xanthophyll (1, 2), and chloroplast extract from spinach (1, 3, 7, 10, 16), have generated a great deal of interest because of their potential as model systems for the investigation of photosynthesis and solar energy conversion (17). The major problem in the use of these membranes as models is that, in general, the photoelectric effect simply represents a dissipation of a preexisting electrochemical gradient. Ideally, model membrane processes involving electron flow across the membrane should lead to storage of some of the quantal energy absorbed by the membrane in the form of a chemical redox potential.The use of an extrinsic protein to modify the photoelectric behavior of chloroplast extract membranes (11,14) in a manner similar to the energy storage qualities of photosynthesis and solar energy cells has been reported. The purpose of this investigation is to present experiments with a number of biliproteins to expand the original observations and to demonstrate the specific electron-directing properties of these proteins.Phycocyanin and phycoerythrin, algal biliproteins, are localized in the stromal area between the thylakoid membranes and exist in the form of large discrete aggregates

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Modification of intensity and direction of electron flow across bileaflet membranes.

Chen¹,

Berns²

1975

Proc. Natl. Acad. Sci. U.S.A.

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Electron Transfer Effects and the Mechanism of the Membrane Potential

Boguslavsky

1986

Reviews of Physiology, Biochemistry and Pharmacology

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Simulation of Photosynthesis, a Resource for Energy

Willner

Ford

Otvos

et al. 1980

Bioelectrochemistry

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This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor the Regents of the University of California. nor any of their employees. makes any warranty. express or implied. or assumes any legal responsibility for the accuracy. completeness. or usefulness of any information. apparatus. product. or process disclosed. or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process. or service by its trade name, trademark. manufacturer, or otherwise, does not necessarily constitute or imply its endorsement. recommendation. or favoring by the United States Government or any agency thereof. or the Regents of the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof or the Regents of the University of California.

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A theoretical model for electron transport through chlorophyll-containing bileaflet membranes

Cited by 24 publications

References 14 publications

Modification of intensity and direction of electron flow across bileaflet membranes.

Modification of intensity and direction of electron flow across bileaflet membranes.

Electron Transfer Effects and the Mechanism of the Membrane Potential

Simulation of Photosynthesis, a Resource for Energy

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