Global Changes of Chlorophyll Excitonic Interactions in Photosystem II During Thermal Denaturation

Author(s): Qiang Xu, Xiaolan Ding, Yandao Gong, Tingyun Kuang, Nanming Zhao

Journal Name: Protein & Peptide Letters

Volume 12 , Issue 6 , 2005

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Photosystem II (PSII) is a multisubunit chlorophyll-binding enzyme that absorbs light to catalyze water oxidation and plastoquinone reduction. Chlorophyll excitonic interaction changes in PSII were studied by absorption and circular dichroism spectra from 25°C to 80°C, and protein subunit denaturation was monitored by differential scanning calorimetry. A four-stage process of chlorophyll excitonic interaction change was observed being correlated with the denaturation of protein subunits.

Keywords: photosystem II, thermal denaturation, chlorophyll excitonic interaction, circular dichroism, absorption spectrum, differential scanning calorimetry

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Article Details

Year: 2005
Page: [573 - 578]
Pages: 6
DOI: 10.2174/0929866054395815
Price: $65

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