1JB0

Crystal Structure of Photosystem I: a Photosynthetic Reaction Center and Core Antenna System from Cyanobacteria

Summary for 1JB0

• Entry DOI: 10.2210/pdb1jb0/pdb
• Related: 1C51
• Descriptor: PHOTOSYSTEM I P700 CHLOROPHYLL A APOPROTEIN A1, PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT XI, PHOTOSYSTEM 1 REACTION CENTRE SUBUNIT XII, ... (20 entities in total)
• Functional Keywords: membrane protein, multiprotein-pigment complex, photosynthesis
• Biological source: Synechococcus elongatus; More
• Total number of polymer chains: 12
• Total formula weight: 359700.13

Authors

Jordan, P.,Fromme, P.,Witt, H.T.,Klukas, O.,Saenger, W.,Krauss, N. (deposition date: 2001-06-01, release date: 2001-08-01, Last modification date: 2024-10-30)

Primary citation

Jordan, P.,Fromme, P.,Witt, H.T.,Klukas, O.,Saenger, W.,Krauss, N.
Three-dimensional Structure of Cyanobacterial Photosystem I at 2.5 A Resolution
NATURE, 411:909-917, 2001

PubMed Abstract: 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: 11418848
DOI: 10.1038/35082000

Experimental method

X-RAY DIFFRACTION (2.5 Å)