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  Light-induced changes in the chemical bond structure of light harvesting complex II probed by FTIR spectroscopy.

Rogl, H., Kühlbrandt, W., & Barth, A. (2003). Light-induced changes in the chemical bond structure of light harvesting complex II probed by FTIR spectroscopy. Biochemistry, 42(34): doi: 10.1021/bi034114+, pp. 10223-10228. doi:10.1021/bi034114+.

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 Urheber:
Rogl, Hans1, Autor           
Kühlbrandt, Werner1, Autor                 
Barth, Andreas2, Autor
Affiliations:
1Department of Structural Biology, Max Planck Institute of Biophysics, Max Planck Society, ou_2068291              
2nstitut für Biophysik, Johann Wolfgang Goethe-Universität, D-60590 Frankfurt am Main, Germany, ou_persistent22              

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Schlagwörter: Amides; Absorption; Oscillation; Infrared light; Conformational transitions
 Zusammenfassung: Light-harvesting complex II (LHC-II) regulates the light energy distribution between photosystem I and II in plants. This process is mediated by phosphorylation of the LHC-II protein, which depends on the oxidation state of photosynthetic electron carriers. In addition to this regulatory mechanism, it has recently been proposed that light can directly induce a conformational change in isolated LHC-II. To provide biophysical evidence for such a conformational change in the protein, we studied infrared absorbance changes in isolated LHC-II upon exposure to light flashes. Compared to the signals obtained with other proteins that exhibit well-characterized conformational changes, the signal in the LHC-II difference spectra is very weak. The position of the difference bands coincides with the main IR absorption bands of chlorophyll. We conclude that there are no detectable light-induced changes in the LHC protein structure and attribute the observed IR signals to light-induced chlorophyll degradation.

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Sprache(n): eng - English
 Datum: 2003-06-262003-01-212003-08-092003-09-01
 Publikationsstatus: Erschienen
 Seiten: 6
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1021/bi034114+
PMID: 12939150
 Art des Abschluß: -

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Titel: Biochemistry
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Columbus, Ohio : American Chemical Society
Seiten: - Band / Heft: 42 (34) Artikelnummer: doi: 10.1021/bi034114+ Start- / Endseite: 10223 - 10228 Identifikator: ISSN: 0006-2960
CoNE: https://pure.mpg.de/cone/journals/resource/954925384103