Photo-oxidation of water in phospholipid bilayer membranes containing chlorophyll a

Toyoshima, Yoshinori; Morino, M.; Motoki, Hiroaki; Sukigara, Mitsunori

doi:10.1038/265187a0

Cited by 62 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note, that the rate of the second step in curve 2 is found to be proportional to the square of the viologen local concentration in the membrane, as expected for reaction (42).…”

Section: Viologen-containing Membranesmentioning

confidence: 91%

See 1 more Smart Citation

Photoinduced electron transfer across membranes

Lymar

Parmon

Zamaraev

1991

Topics in Current Chemistry

View full text Add to dashboard Cite

“…Note, that the rate of the second step in curve 2 is found to be proportional to the square of the viologen local concentration in the membrane, as expected for reaction (42).…”

Section: Viologen-containing Membranesmentioning

confidence: 91%

“…The first communication about the Chl-sensitized water oxidation to O2 on the outer vesicle interface conjugated with Fe(CN)~-reduction at the inner interface appeared in 1977 [42] (see System 2 in Table 1). However an attempt to reproduce this result was a failure [273].…”

Section: Photocatalytic Oxidation Of Watermentioning

confidence: 98%

Photoinduced electron transfer across membranes

Lymar

Parmon

Zamaraev

1991

Topics in Current Chemistry

View full text Add to dashboard Cite

“…chlorophyll in vesicles, see Hurley and Tollin, 1982). During the past decade it has been established that dyes that are dissolved in lipid bilayer membranes can photosensitize electron transfer across the bilayers, but the details of electron transport are not well understood (Hong and Mauzerall, 1974;Tien, 1976;Mangel, 1976;Tien and Karvaly, 1976;Toyoshima et al, 1977;Ford et al, 1978;Kurihara et al, 1979a, b;Sudo and Toda, 1979;Ford et al, 1979;Matsuo et al, 1980a, b;Feldberg et al, 1981;Tunuli and Fendler, 1981;Leblanc et a/., 1981; Laane et a/., 1981;Katagi et al, 1981;Ilani and Mauzerall, 1981).…”

Section: Introductionmentioning

confidence: 99%

Direct Observation of Electron Transfer Across a Lipid Bilayer: Pulsed Laser Photolysis of an Asymmetric Vesicle System Containing Chlorophyll, Methyl Viologen and Edta*

Ford

Tollin

1982

Photochem & Photobiology

View full text Add to dashboard Cite

Abstract— Suspensions of vesicles composed of chlorophyll a (Chi) and phospholipid that were asymmetric with respect to aqueous solutions of methyl viologen (MV2+), an electron acceptor, and EDTA, an electron donor, were investigated using both flash and steady‐state photolysis techniques. It was shown that Chl‐photosensitized electron transfer occurred across the walls of the vesicles from EDTA to MV2+. Flash photolysis indicated that MV2+ dissolved in the interior aqueous compartments of the vesicles oxidized only those triplet excited state Chi molecules that were dissolved in the inner monolayers of the vesicle walls. The resultant radical products, Chi+ and MV+, recombined with a halftime of the order of 10‐4s. EDTA, added externally to the vesicles, competed effectively with MV+ as a reducing agent for Chl+. This places a lower limit of 104 s‐1 on the rate constant for transmembrane electron transfer. Compartmentalization by the vesicle wall of the competing pathways for the reduction of Chi+ resulted in a nonlinear dependence of the rate constant of Chl+ decay on EDTA concentration. The magnitude of the rate constant of electron transfer through the membrane and the way that the kinetics of Chl+ decay depended on the concentration of Chi in the membrane strongly suggest that the electron transfer occurred by electron exchange between Chi and Chl+.

show abstract

“…Since lipids are requisite for the photo-oxidation of water by chloroplasts (17,18), as well as oxidative phosphorylation in mitochondria, this requirement for lipids in …”

Section: Complex Lipid Synthesismentioning

confidence: 99%

Physiological Response of Lipid Components to Thiocarbamates and Antidotes

Wilkinson

1978

Chemistry and Action of Herbicide Antidotes

View full text Add to dashboard Cite

Photo-oxidation of water in phospholipid bilayer membranes containing chlorophyll a

Cited by 62 publications

References 8 publications

Photoinduced electron transfer across membranes

Photoinduced electron transfer across membranes

Direct Observation of Electron Transfer Across a Lipid Bilayer: Pulsed Laser Photolysis of an Asymmetric Vesicle System Containing Chlorophyll, Methyl Viologen and Edta*

Physiological Response of Lipid Components to Thiocarbamates and Antidotes

Contact Info

Product

Resources

About