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Photosystem I
Exploring the Structure
You can look at the many photosystem I cofactors of the electron transfer chain and the antenna in PDB entry 1jb0. Only one of the three subunits is included in the file, but you will find that this is complicated enough. If you display only the cofactors, you will get a picture like the one shown here. This picture shows the electron transfer chain at the center, drawn in spacefilling spheres. Two special chlorophyll molecules, residues 1140 and 1239, are also shown in spheres and colored green. These two chlorophyll molecules act as a bridge between the reaction center in the middle and the many molecules in the surrounding antenna. The many antenna cofactors are shown here in bond representation with small spheres for the magnesium ions at the center of each chlorophyll.This illustration was created with RasMol. You can create similar pictures by clicking on the accession code above and picking View Structure. The residue numbers for the electron transfer chain are 1011-1013 and 1021-1023 for the chlorophylls, 2001-2002 for the phylloquinones, and 3001-3003 for the iron sulfur clusters.
A list of all photosystem I structures in the PDB as of October, 2001 is available here. For suggestions for more information on photosystem I, click here.
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Last changed by: A.Honegger,