Abstract
Type I copper proteins, plastocyanin and rice blue protein, were reduced with O2 (-). The reduction rate constants of plastocyanins from several sources with O2 (-) are about 10(6) m(-1) sec(-1) (1.0 × 10(6) m(-1) sec(-1) for spinach and kidney bean plastocyanins and 6.7 × 10(5) m(-1)sec(-1) for Japanese radish plastocyanin) at pH 7.8 at 25°C and not significantly different from that observed for rice blue protein (7.3 × 10(5) m(-1)sec(-1)). Reduced plastocyanin was oxidized by H2O2 through the peroxidase-like reaction of Cu,Zn-superoxide dismutase.
Keywords
PlastocyaninChemistrySuperoxide dismutaseSpinachPhotochemistryBiochemistryEnzymePhotosystem IPhotosystem II
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Publication Info
- Year
- 1980
- Type
- article
- Volume
- 21
- Issue
- 8
- Pages
- 1431-1438
- Citations
- 29
- Access
- Closed
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Cite This
Masaaki Takahashi,
Y Kono,
Kozi Asada
(1980).
Reduction of plastocyanin with O2- and superoxide dismutase-dependent oxidation of plastocyanin by H2O2.
Plant and Cell Physiology
, 21
(8)
, 1431-1438.
https://doi.org/10.1093/pcp/21.8.1431
Identifiers
- DOI
- 10.1093/pcp/21.8.1431