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            <update>2026-08-12</update>
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        <grant_support>
            <grant_reference>
                <funding_body>Royal Society</funding_body>
                <code>180030</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Biotechnology and Biological Sciences Research Council (BBSRC)</funding_body>
                <code>R003890</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
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                <code>JP20am0101082</code>
                <country>Japan</country>
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        <title>Structure of RC-LH1-PufX from Rhodobacter veldkampii</title>
        <authors_list>
            <author>Bracun L</author>
            <author>Yamagata A</author>
        </authors_list>
        <keywords>membrane protein, light-harvesting, reaction center, pufx, PHOTOSYNTHESIS</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-7698-3718" order="1">Bracun L</author>
                    <author order="2">Yamagata A</author>
                    <author order="3">Christianson BM</author>
                    <author ORCID="0000-0002-7091-0646" order="4">Terada T</author>
                    <author ORCID="0000-0002-5022-0437" order="5">Canniffe DP</author>
                    <author ORCID="0000-0002-7997-2149" order="6">Shirouzu M</author>
                    <author ORCID="0000-0002-8884-4819" order="7">Liu LN</author>
                    <title>Cryo-EM structure of the photosynthetic RC-LH1-PufX supercomplex at 2.8-angstrom resolution.</title>
                    <journal_abbreviation>Sci Adv</journal_abbreviation>
                    <country>US</country>
                    <volume>7</volume>
                    <year>2021</year>
                    <external_references type="PUBMED">34134992</external_references>
                    <external_references type="DOI">doi:10.1126/sciadv.abf8864</external_references>
                    <external_references type="ISSN">2375-2548</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
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                <pdb_id>7ddq</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
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                <db_name>EMDB</db_name>
                <accession_id>EMD-30656</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Structure of RC-LH1-PufX from Rhodobacter veldkampii</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Photosynthetic core complex featuring reaction center, LH1 and PufX</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Photosynthetic core complex featuring reaction center, LH1 and PufX</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>6</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Antenna pigment protein alpha chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0066990240000000005</theoretical>
                </molecular_weight>
                <number_of_copies>15</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSKFYKIWLIFDPRRVFVAQGVFLFLLAVMIHLMLLSNPGFNWLDISGVKYERVAAE</string>
                    <external_references type="UNIPROTKB">A0A2T4JIR4</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Antenna pigment protein beta chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.005551439</theoretical>
                </molecular_weight>
                <number_of_copies>15</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MADKDLSFTGLTDQQAQELHSVYLQGMWLFISVAIVAHLAVFIWRPWL</string>
                    <external_references type="UNIPROTKB">A0A2T4JIL7</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>PufX</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.008923259</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAEKHYLDGATKVGMATMGAAAMGKGMGITAVVFFGTVFFVVALAFIGQFLPDRSREAPYPNTIFQVNDIDGTVDGKYTR
FAN</string>
                    <external_references type="UNIPROTKB">A0A2T4JIP3</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Photosynthetic reaction center L subunit</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.030896776999999997</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MALLSFERKYRVPGGTLIGGNLFDFWVGPFYVGFFGVTSVFFAALGTLMILWGASLGDTWNPLLISINPPPLEYGLGAAP
LREGGIWQVVTLCAIGAFVSWAMREVEICRKLGIGLHIPFAFSFAIFAYITLVVIRPALMGAWGHGFQYGVFTHLEWVNN
VGYQYGNFHYNPLHMLGISLFFTTTLALGLHGALILSAANPETGKEMRTPDHEDTFFRDLVGYSVGTLGIHRLGLLLALN
AAFWSAMCILASGTVWFDQWVFWWDWWYNLPFWADL</string>
                    <external_references type="UNIPROTKB">A0A2T4JIS6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Reaction center protein M chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.034425746</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAEYQNIFTQVQVAGKPELGMVEGVNLENRTTGTTNWPILGWFGNAQLGPIYLGTLGTMSLIFGAFWFFLVGVSFIIQAD
YSPALFLRELFRAGLFPPAPEYGLSLSAPLMEGGLWLIASFFLMLSVLLWWARTYKRAADLGMGKHTAWAFAGALWLMFV
LSFFRPILMGSWSEAVPYGIFPHLDWTNNFSLTHGNLFYNPFHGLSIAFLYGSTMLFAMHGATILAVSRLGGERELEQIV
DRGTAAERAALFWRWTMGFNATMEGIHRWGWWFAVLTPVTGGIGILLSGTVVEDWSVWAQVHGYKALN</string>
                    <external_references type="UNIPROTKB">A0A2T4JIN0</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>Photosynthetic reaction center subunit H</name>
                <natural_source database="NCBI">
                    <organism ncbi="1185920">Rhodobacter veldkampii DSM 11550</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.027445557</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MVGVNFFGDFDLASLAIWSFWLFFALLVYYLQTENMREGYPLENEDGGPAVNQGPFPLPSQKTFKLPHGRGEVTVPDYKK
EARDVALARTAVNDGFPHAPTGNPMLDGVGPASWAPRRDIPELDGHGHAKVVPMSVASAFFVSAGRDPRGLPVIANDMKT
VGTVTEMWVDVAEHMVRYLEVDLASGGKCLVPMTMAIIKKHAVVVQSISSAAFASVPQTKSMTEISMLEEEKICAYFAGG
TMYCADAKPKLF</string>
                    <external_references type="UNIPROTKB">A0A2T4JIP4</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="7">
                <name>BACTERIOCHLOROPHYLL A</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0009115039999999999</theoretical>
                </molecular_weight>
                <number_of_copies>34</number_of_copies>
                <formula>BCL</formula>
            </ligand>
            <ligand macromolecule_id="8">
                <name>SPHEROIDENE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000568914</theoretical>
                </molecular_weight>
                <number_of_copies>15</number_of_copies>
                <formula>SPO</formula>
            </ligand>
            <ligand macromolecule_id="9">
                <name>UBIQUINONE-10</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0008633429999999999</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <formula>U10</formula>
            </ligand>
            <ligand macromolecule_id="10">
                <name>BACTERIOPHEOPHYTIN A</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000889215</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>BPH</formula>
            </ligand>
            <ligand macromolecule_id="11">
                <name>FE (III) ION</name>
                <molecular_weight>
                    <theoretical units="MDa">5.5845e-05</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>FE</formula>
            </ligand>
            <ligand macromolecule_id="12">
                <name>1,2-Distearoyl-sn-glycerophosphoethanolamine</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000748065</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>3PE</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                <single_particle_preparation preparation_id="1">
                    <buffer>
                        <ph>8.0</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil</model>
                        <material>COPPER</material>
                        <mesh>300</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                        </support_film>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
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                </single_particle_preparation>
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            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>DARK FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">48.0</average_electron_dose_per_image>
                        </image_recording>
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                <image_recording_id>1</image_recording_id>
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                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="PDB ENTRY"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">2.84</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>184921</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
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            <col>260</col>
            <row>260</row>
            <sec>260</sec>
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        <cell>
            <a units="Å">215.8</a>
            <b units="Å">215.8</b>
            <c units="Å">215.8</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
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            <x units="Å">0.83</x>
            <y units="Å">0.83</y>
            <z units="Å">0.83</z>
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            <contour primary="true">
                <level>0.0157</level>
                <source>AUTHOR</source>
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