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  Photoelectric signals generated by bovine rod outer segment disk membranes attached to a lecithin bilayer

Bauer, P. J., Bamberg, E., & Fahr, A. (1984). Photoelectric signals generated by bovine rod outer segment disk membranes attached to a lecithin bilayer. Biophysical Journal, 46(1), 111-116. doi:10.1016/S0006-3495(84)84003-5.

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 Urheber:
Bauer, Paul J.1, Autor
Bamberg, Ernst2, Autor           
Fahr, Alfred3, Autor
Affiliations:
1Institute of Neurobiology, Kernforschungsanlage (KFA), 5170 Jülich, Germany, ou_persistent22              
2Transport Proteins Group, Max Planck Institute of Biophysics, Max Planck Society, ou_3273415              
3Department of Physics, Biophysics Group, Free University (FU) Berlin, 1000 Berlin 33, Germany, ou_persistent22              

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 Zusammenfassung: Purified bovine rod outer segment disk membranes were attached to a lecithin bilayer membrane. After photoexcitation with a 500-nm flash delivered by a dye laser, a negative photovoltage was observed on the bilayer under normal ionic strengths (100 mM KCl), which had a rise phase of 1-3 ms at 20 degrees C. The photoresponse was obviously due to bleaching of rhodopsin as it decreased for successive flashes of light. It originated most probably during the metarhodopsin-I metarhodopsin-II (meta-I-II) transition of rhodopsin because it was pH dependent at 2 degrees C but not at 20 degrees C. At 10 mM KCl, i.e., under hypotonic conditions, a positive photovoltage with slower kinetics than at high salt was observed. As the disk membranes were merely attached to the bilayer membrane, the photovoltage was apparently due to a light-induced transmembrane potential change in the disk membranes. Possible electrogenic mechanisms underlying the photosignal will be discussed.

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Sprache(n): eng - English
 Datum: 1984-02-271983-05-101984-07-01
 Publikationsstatus: Erschienen
 Seiten: 6
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/S0006-3495(84)84003-5
PMID: 6743754
 Art des Abschluß: -

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Titel: Biophysical Journal
  Andere : Biophys. J.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Cambridge, Mass. : Cell Press
Seiten: - Band / Heft: 46 (1) Artikelnummer: - Start- / Endseite: 111 - 116 Identifikator: ISSN: 0006-3495
CoNE: https://pure.mpg.de/cone/journals/resource/954925385117