Structural highlights
5v8k is a 2 chain structure with sequence from Helmi and Heliobacterium modesticaldum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | , , , , , , , |
| Related: | 1jb0 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT |
Publication Abstract from PubMed
Reaction centers are pigment-protein complexes that drive photosynthesis by converting light into chemical energy. It is believed that they arose once from a homodimeric protein. The symmetry of a homodimer is broken in heterodimeric reaction center structures, such as those reported previously. The 2.2-A resolution X-ray structure of the homodimeric reaction center/photosystem from the phototroph, Heliobacterium modesticaldum, exhibits perfect C2 symmetry. The core polypeptide dimer and two small subunits coordinate 54 (bacterio)chlorophylls and 2 carotenoids that capture and transfer energy to the electron transfer chain at the center, which performs charge separation and consists of 6 (bacterio)chlorophylls and an iron-sulfur cluster; unlike other reaction centers, it lacks a bound quinone. This structure preserves characteristics of the ancestral reaction center, providing insight into evolution of photosynthesis.
Structure of a symmetric photosynthetic reaction center-photosystem.,Gisriel C, Sarrou I, Ferlez B, Golbeck JH, Redding KE, Fromme R Science. 2017 Jul 27. pii: eaan5611. doi: 10.1126/science.aan5611. PMID:28751471[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Gisriel C, Sarrou I, Ferlez B, Golbeck JH, Redding KE, Fromme R. Structure of a symmetric photosynthetic reaction center-photosystem. Science. 2017 Jul 27. pii: eaan5611. doi: 10.1126/science.aan5611. PMID:28751471 doi:http://dx.doi.org/10.1126/science.aan5611
