InterPro domain: IPR041844

Plantacyanins belong to the phytocyanin family of blue copper proteins, a ubiquitous family of plant cupredoxins [ 1 ]. Plantacyanin is involved in electron transfer reactions with the Cu centre transitioning between the oxidized Cu(II) form and the reduced Cu(I) form. The exact function of plantacyanin is unknown. Plantacyanins may also be stress-related proteins and be involved in plant defense responses [ 2 , 3 , 4 , 5 ]. Plantacyanin is shown to play a role in reproduction in Arabidopsis [ 6 ].

1. Uclacyanins, stellacyanins, and plantacyanins are distinct subfamilies of phytocyanins: plant-specific mononuclear blue copper proteins. Protein Sci. 7, 1915-29
2. Preliminary crystallographic data for a basic copper-containing protein from cucumber seedlings. J. Mol. Biol. 112, 649-50
3. Studies on plantacyanin. I. Distribution in the plant kingdom, subcellular localization and physicochemical properties. Biochim. Biophys. Acta 667, 421-32
4. Plantacyanin from spinach. FEBS Lett. 55, 272-4
5. The structure of a phytocyanin, the basic blue protein from cucumber, refined at 1.8 A resolution. J. Mol. Biol. 262, 686-705
6. Plantacyanin plays a role in reproduction in Arabidopsis. Plant Physiol. 138, 778-89