• Register
X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

X

Leaving Community

Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.

No
Yes

Three-dimensional structure of cyanobacterial photosystem I at 2.5 A resolution.

Life on Earth depends on photosynthesis, the conversion of light energy from the Sun to chemical energy. In plants, green algae and cyanobacteria, this process is driven by the cooperation of two large protein-cofactor complexes, photosystems I and II, which are located in the thylakoid photosynthetic membranes. The crystal structure of photosystem I from the thermophilic cyanobacterium Synechococcus elongatus described here provides a picture at atomic detail of 12 protein subunits and 127 cofactors comprising 96 chlorophylls, 2 phylloquinones, 3 Fe4S4 clusters, 22 carotenoids, 4 lipids, a putative Ca2+ ion and 201 water molecules. The structural information on the proteins and cofactors and their interactions provides a basis for understanding how the high efficiency of photosystem I in light capturing and electron transfer is achieved.

Pubmed ID: 11418848

Authors

  • Jordan P
  • Fromme P
  • Witt HT
  • Klukas O
  • Saenger W
  • Krauss N

Journal

Nature

Publication Data

June 21, 2001

Associated Grants

None

Mesh Terms

  • Carotenoids
  • Chlorophyll
  • Crystallography, X-Ray
  • Cyanobacteria
  • Electron Transport
  • Light-Harvesting Protein Complexes
  • Lipids
  • Macromolecular Substances
  • Models, Molecular
  • Peptides
  • Photosynthetic Reaction Center Complex Proteins
  • Photosystem I Protein Complex
  • Protein Conformation