Crystal Structure of the RC-LH1 Core Complex from Rhodopseudomonas palustris
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- 12 December 2003
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 302 (5652) , 1969-1972
- https://doi.org/10.1126/science.1088892
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 α- and β-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 α-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.Keywords
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