1PYH

Crystal structure of RC-LH1 core complex from Rhodopseudomonas palustris

Summary for 1PYH

• Entry DOI: 10.2210/pdb1pyh/pdb
• Descriptor: Reaction center protein L chain, Reaction center protein M chain, Reaction center protein H chain, ... (8 entities in total)
• Functional Keywords: bacterial photosynthetic core complex, integral membrane proteins, light harvesting complex, reaction centre, photosynthesis
• Biological source: Rhodopseudomonas palustris; More
• Total number of polymer chains: 34
• Total formula weight: 177264.83

Authors

Roszak, A.W.,Howard, T.D.,Southall, J.,Gardiner, A.T.,Law, C.J.,Isaacs, N.W.,Cogdell, R.J. (deposition date: 2003-07-08, release date: 2004-03-02, Last modification date: 2024-04-03)

Primary citation

Roszak, A.W.,Howard, T.D.,Southall, J.,Gardiner, A.T.,Law, C.J.,Isaacs, N.W.,Cogdell, R.J.
Crystal structure of the RC-LH1 core complex from Rhodopseudomonas palustris.
Science, 302:1969-1972, 2003

PubMed Abstract: The crystal structure at 4.8 angstrom resolution of the reaction center-light harvesting 1 (RC-LH1) core complex from Rhodopseudomonas palustris shows the reaction center surrounded by an oval LH1 complex that consists of 15 pairs of transmembrane helical alpha- and beta-apoproteins and their coordinated bacteriochlorophylls. Complete closure of the RC by the LH1 is prevented by a single transmembrane helix, out of register with the array of inner LH1 alpha-apoproteins. This break, located next to the binding site in the reaction center for the secondary electron acceptor ubiquinone (UQB), may provide a portal through which UQB can transfer electrons to cytochrome b/c1.

PubMed: 14671305
DOI: 10.1126/science.1088892

Experimental method

X-RAY DIFFRACTION (4.8 Å)