Photosystem I

Photosystem I (PSI) is the second photosystem in the light harvesting systems of plants, algae and some bacteria. PSI is composed of 11 protein subunits, cytochrome b6, ferredoxin, plastocyanin, 4 phospholipids, 5 chlorophys and carotenoid pigments, 3 coenzymes, Ca+2 and Mg+2 ions.

3D Structures of photosystem I3D Structures of photosystem I

3pcq, 1jb0, 1c51, 2pps – TePSI – Thermosynechococcus elongatus
3lw5, 2wsc, 2wse, 2wsf, 2o01, 1qzv – PSI – pea
1gxi – SyPSI subunit IV – Synechocystis - NMR
1k0t - SyPSI subunit I – NMR
1pse, 1psf - SyPSI subunit V – NMR