Structure of the cytochrome b6f complex of oxygenic photosynthesis: tuning the cavity.
Article Details
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Kurisu G, Zhang H, Smith JL, Cramer WA
Structure of the cytochrome b6f complex of oxygenic photosynthesis: tuning the cavity.
Science. 2003 Nov 7;302(5647):1009-14. Epub 2003 Oct 2.
- PubMed ID
- 14526088 [ View in PubMed]
- Abstract
The cytochrome b6f complex provides the electronic connection between the photosystem I and photosystem II reaction centers of oxygenic photosynthesis and generates a transmembrane electrochemical proton gradient for adenosine triphosphate synthesis. A 3.0 angstrom crystal structure of the dimeric b6f complex from the thermophilic cyanobacterium Mastigocladus laminosus reveals a large quinone exchange cavity, stabilized by lipid, in which plastoquinone, a quinone-analog inhibitor, and a novel heme are bound. The core of the b6f complex is similar to the analogous respiratory cytochrome bc1 complex, but the domain arrangement outside the core and the complement of prosthetic groups are strikingly different. The motion of the Rieske iron-sulfur protein extrinsic domain, essential for electron transfer, must also be different in the b6f complex.
DrugBank Data that Cites this Article
- Polypeptides
Name UniProt ID Cytochrome b6 P83791 Details Cytochrome b6-f complex subunit 4 P83792 Details Cytochrome b6-f complex iron-sulfur subunit P83794 Details Cytochrome f P83793 Details Cytochrome b6-f complex subunit 5 P83797 Details Cytochrome b6-f complex subunit 6 P83795 Details Cytochrome b6-f complex subunit 7 P83796 Details Cytochrome b6-f complex subunit 8 P83798 Details