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== Function == | == Function == | ||
[[http://www.uniprot.org/uniprot/LHB_BLAVI LHB_BLAVI]] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers. [[http://www.uniprot.org/uniprot/RCEH_BLAVI RCEH_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/CYCR_BLAVI CYCR_BLAVI]] The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.<ref>PMID:10736158</ref> [[http://www.uniprot.org/uniprot/RCEM_BLAVI RCEM_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/LHG_BLAVI LHG_BLAVI]] One of the components of the bacteriochlorophyll-protein complex in the chromatophore membrane. [[http://www.uniprot.org/uniprot/RCEL_BLAVI RCEL_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/LHA_BLAVI LHA_BLAVI]] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers. | [[http://www.uniprot.org/uniprot/LHB_BLAVI LHB_BLAVI]] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers. [[http://www.uniprot.org/uniprot/RCEH_BLAVI RCEH_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/CYCR_BLAVI CYCR_BLAVI]] The reaction center of purple bacteria contains a tightly bound cytochrome molecule which re-reduces the photo oxidized primary electron donor.<ref>PMID:10736158</ref> [[http://www.uniprot.org/uniprot/RCEM_BLAVI RCEM_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/LHG_BLAVI LHG_BLAVI]] One of the components of the bacteriochlorophyll-protein complex in the chromatophore membrane. [[http://www.uniprot.org/uniprot/RCEL_BLAVI RCEL_BLAVI]] The reaction center is a membrane-bound complex that mediates the initial photochemical event in the electron transfer process of photosynthesis. [[http://www.uniprot.org/uniprot/LHA_BLAVI LHA_BLAVI]] Antenna complexes are light-harvesting systems, which transfer the excitation energy to the reaction centers. | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The light-harvesting 1-reaction centre (LH1-RC) complex is a key functional component of bacterial photosynthesis. Here we present a 2.9 A resolution cryo-electron microscopy structure of the bacteriochlorophyll b-based LH1-RC complex from Blastochloris viridis that reveals the structural basis for absorption of infrared light and the molecular mechanism of quinone migration across the LH1 complex. The triple-ring LH1 complex comprises a circular array of 17 beta-polypeptides sandwiched between 17 alpha- and 16 gamma-polypeptides. Tight packing of the gamma-apoproteins between beta-polypeptides collectively interlocks and stabilizes the LH1 structure; this, together with the short Mg-Mg distances of bacteriochlorophyll b pairs, contributes to the large redshift of bacteriochlorophyll b absorption. The 'missing' 17th gamma-polypeptide creates a pore in the LH1 ring, and an adjacent binding pocket provides a folding template for a quinone, Q P, which adopts a compact, export-ready conformation before passage through the pore and eventual diffusion to the cytochrome bc 1 complex. | ||
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| + | Cryo-EM structure of the Blastochloris viridis LH1-RC complex at 2.9 A.,Qian P, Siebert CA, Wang P, Canniffe DP, Hunter CN Nature. 2018 Apr;556(7700):203-208. doi: 10.1038/s41586-018-0014-5. Epub 2018 Apr, 4. PMID:29618818<ref>PMID:29618818</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 6et5" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 06:46, 18 April 2018
Reaction centre light harvesting complex 1 from Blc. viridian
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