Effect of oxidation state of plastocyanin on the remote binding site pK a
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 9,p. 2011-2012
- https://doi.org/10.1039/dt9860002011
Abstract
The variation of rate constants for the [Co(phen)3]2+[phen = 1,1 0-phenanthroline), [Co(terpy)2]2+(terpy = 2,2′;6′,2″-terpyridine), and [Ru(NH3)5(py)]2+(py = pyridine) reductions of parsley plastocyanin PCu(II) with pH indicate an acid dissociation pKa at the remote east face of 5.05, whereas for the oxidant [Co(phen)3]3+ with PCu(I) the value is 5.8. Implications of this change and the relevance to the reaction with cytochrome f are considered.Keywords
This publication has 1 reference indexed in Scilit:
- Structure of oxidized poplar plastocyanin at 1·6 Å resolutionJournal of Molecular Biology, 1983