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In situ high-resolution structure of the baseplate antenna complex in Chlorobaculum tepidum.

Nielsen, Jakob Toudahl (författare)
Center for Insoluble Protein Structures (inSPIN), and Interdisciplinary Nanoscience Center (iNANO) Department of Chemistry and Department of Chemistry, Aarhus C DK-8000, Denmark
Kulminskaya, Natalia V (författare)
Center for Insoluble Protein Structures (inSPIN), and Interdisciplinary Nanoscience Center (iNANO) Department of Chemistry and Department of Chemistry, Aarhus C DK-8000, Denmark
Bjerring, Morten (författare)
Center for Insoluble Protein Structures (inSPIN), and Interdisciplinary Nanoscience Center (iNANO) Department of Chemistry and Department of Chemistry, Aarhus C DK-8000, Denmark
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Linnanto, Juha M (författare)
Institute of Physics, University of Tartu, Estonia
Rätsep, Margus (författare)
Institute of Physics, University of Tartu, Estonia
Pedersen, Marie Østergaard (författare)
Center for Insoluble Protein Structures (inSPIN), and Novo Nordisk a/s, Novo Nordisk Park, Denmark
Lambrev, Petar H (författare)
Hungarian Academy of Sciences, Biological Research Centre, Szeged, Hungary
Dorogi, Márta (författare)
Hungarian Academy of Sciences, Biological Research Centre, Szeged, Hungary
Garab, Győző (författare)
Hungarian Academy of Sciences, Biological Research Centre, Szeged, Hungary
Thomsen, Karen (författare)
Interdisciplinary Nanoscience Center (iNANO), Aarhus University
Jegerschöld, Caroline (författare)
Karolinska Institutet
Frigaard, Niels-Ulrik (författare)
Section for Marine Biology, Department of Biology, University of Copenhagen
Lindahl, Martin (författare)
Karolinska Institutet, Biovetenskaper och Nutrition, samt Strukturell Bioteknik, KTH
Nielsen, Niels Chr (författare)
Center for Insoluble Protein Structures (inSPIN), and Interdisciplinary Nanoscience Center (iNANO) Department of Chemistry and Department of Chemistry, Aarhus C DK-8000, Denmark
Pedersen, MO (författare)
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 (creator_code:org_t)
2016-08-18
2016
Engelska.
Ingår i: Nature Communications. - : Springer Science+Business Media B.V.. - 2041-1723. ; 7
Relaterad länk:
https://doi.org/10.1...
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https://www.nature.c...
https://urn.kb.se/re...
https://doi.org/10.1...
http://kipublication...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Photosynthetic antenna systems enable organisms harvesting light and transfer the energy to the photosynthetic reaction centre, where the conversion to chemical energy takes place. One of the most complex antenna systems, the chlorosome, found in the photosynthetic green sulfur bacterium Chlorobaculum (Cba.) tepidum contains a baseplate, which is a scaffolding super-structure, formed by the protein CsmA and bacteriochlorophyll a. Here we present the first high-resolution structure of the CsmA baseplate using intact fully functional, light-harvesting organelles from Cba. tepidum, following a hybrid approach combining five complementary methods: solid-state NMR spectroscopy, cryo-electron microscopy, isotropic and anisotropic circular dichroism and linear dichroism. The structure calculation was facilitated through development of new software, GASyCS for efficient geometry optimization of highly symmetric oligomeric structures. We show that the baseplate is composed of rods of repeated dimers of the strongly amphipathic CsmA with pigments sandwiched within the dimer at the hydrophobic side of the helix.

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Biological Physics
Biologisk fysik

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