Molecule of the Month: Photosynthetic Supercomplexes
Light is captured by huge supercomplexes of photosystems and antenna systems.
Adjusting the Antenna
Exploring the Structure
Photosystem II Supercomplex
Light-harvesting complexes are filled with light-absorbing cofactors, with just barely enough protein to hold them all together. In this image (PDB entry 5xnl), the protein chains are shown with a backbone representation to make it easier to see all the cofactors arrayed inside. Chlorophylls are shown in bright green, and other colored cofactor molecules, like lutein and beta-carotene, are shown in pink. To explore this structure in more detail, click on the image for an interactive jmol.
Topics for Further Discussion
- You can explore the structures of the many cofactors in these complexes in the "Small Molecules" section of each PDB entry page.
- Take a look at the cryoEM data for these structures at the EMDataResource--there is a link at the top of each PDB entry page.
April 2020, David Goodsellhttp://doi.org/10.2210/rcsb_pdb/mom_2020_4