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The ferredoxin-dependent nitrite reductase from the green alga Chlamydomonas reinhardtii has been cloned, expressed in Escherichia coli as a His-tagged recombinant protein, and purified to homogeneity. The spectra, kinetic properties and substrate-binding parameters of the C. reinhardtii enzyme are quite similar to those of the ferredoxin-dependent spinach chloroplast nitrite reductase. Computer modeling,...
Thioredoxin-mediated light regulation in plant chloroplasts involves a unique class of disulfide reductases that catalyze disulfide reduction in two one-electron steps using a [2Fe–2S] ferredoxin as the electron donor and an active site comprising a [4Fe–4S] cluster and a redox-active disulfide. This review summarizes structural and spectroscopic studies of ferredoxin:thioredoxin reductase (FTR) and...
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