<?xml version="1.0" encoding="UTF-8"?>
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    <admin>
        <current_status>
            <date>2024-11-13</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-09-17</deposition>
            <header_release>2021-11-24</header_release>
            <map_release>2021-11-24</map_release>
            <update>2024-11-13</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Biotechnology and Biological Sciences Research Council (BBSRC)</funding_body>
                <code>BB/M000265/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>European Research Council (ERC)</funding_body>
                <code>845126</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>209407/Z/17/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of the dimeric Rhodobacter sphaeroides RC-LH1 core complex at 2.9 A: the structural basis for dimerisation</title>
        <authors_list>
            <author>Qian P</author>
            <author>Hunter CN</author>
        </authors_list>
        <keywords>light harvesting complex, photosynthesis, Cryo-EM, purple bacteria, RC-LH1, RC-LH1-PufXYZ, dimer, dimeric core complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-5888-8546" order="1">Qian P</author>
                    <author ORCID="0000-0002-3514-8377" order="2">Croll TI</author>
                    <author ORCID="0000-0001-6572-434X" order="3">Hitchcock A</author>
                    <author ORCID="0000-0001-9671-2472" order="4">Jackson PJ</author>
                    <author ORCID="0000-0002-9527-0593" order="5">Salisbury JH</author>
                    <author ORCID="0000-0002-8991-9560" order="6">Castro-Hartmann P</author>
                    <author ORCID="0000-0002-8517-5410" order="7">Sader K</author>
                    <author ORCID="0000-0002-0754-0363" order="8">Swainsbury DJK</author>
                    <author ORCID="0000-0003-2533-9783" order="9">Hunter CN</author>
                    <title>Cryo-EM structure of the dimeric Rhodobacter sphaeroides RC-LH1 core complex at 2.9 angstrom : the structural basis for dimerisation.</title>
                    <journal_abbreviation>Biochem.J.</journal_abbreviation>
                    <country>UK</country>
                    <volume>478</volume>
                    <first_page>3923</first_page>
                    <last_page>3937</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34622934</external_references>
                    <external_references type="DOI">doi:10.1042/BCJ20210696</external_references>
                    <external_references type="ISSN">1470-8728</external_references>
                    <external_references type="CSD">0043</external_references>
                    <external_references type="ASTM">BIJOAK</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author order="10">Qian P</author>
                    <author order="11">Hunter CN</author>
                    <title>Real-space refinement in PHENIX for cryo-EM and crystallography</title>
                    <journal_abbreviation>Acta Crystallogr., Sect. D: Biol. Crystallogr.</journal_abbreviation>
                    <country>DK</country>
                    <volume>74</volume>
                    <first_page>531</first_page>
                    <last_page>544</last_page>
                    <year>2018</year>
                    <external_references type="ISSN">0907-4449</external_references>
                    <external_references type="CSD">0766</external_references>
                    <external_references type="ASTM">ABCRE6</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7pqd</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Light harvesting core complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Light harvesting core complex</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <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>
                        <macromolecule_id>7</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>8</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>LH1-alpha</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.00684418</theoretical>
                </molecular_weight>
                <number_of_copies>28</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>(FME)SKFYKIWMIFDPRRVFVAQGVFLFLLAVMIHLILLSTPSYNWLEISAAKYNRVAVAE</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>LH1-beta</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.005592361</theoretical>
                </molecular_weight>
                <number_of_copies>28</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MADKSDLGYTGLTDEQAQELHSVYMSGLWLFSAVAIVAHLAVYIWRPWF</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>RC-H</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.026544471</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MVGVTAFGNFDLASLAIYSFWIFLAGLIYYLQTENMREGYPLENEDGTPAANQGPFPLPKPKTFILPHGRGTLTVPGPES
EDRPIALARTAVSEGFPHAPTGDPMKDGVGPASWVARRDLPELDGHGHNKIKPMKAAAGFHVSAGKNPIGLPVRGCDLEI
AGKVVDIWVDIPEQMARFLEVELKDGSTRLLPMQMVKVQSNRVHVNALSSDLFAGIPTIKSPTEVTLLEEDKICGYVAGG
LMYAAP</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>RC-L</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.031346388999999995</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>ALLSFERKYRVPGGTLVGGNLFDFWVGPFYVGFFGVATFFFAALGIILIAWSAVLQGTWNPQLISVYPPALEYGLGGAPL
AKGGLWQIITICATGAFVSWALREVEICRKLGIGYHIPFAFAFAILAYLTLVLFRPVMMGAWGYAFPYGIWTHLDWVSNT
GYTYGNFHYNPAHMIAISFFFTNALALALHGALVLSAANPEKGKEMRTPDHEDTFFRDLVGYSIGTLGIHRLGLLLSLSA
VFFSALCMIITGTIWFDQWVDWWQWWVKLPWWANIPGGING</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Reaction center protein M chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.034398543</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AEYQNIFSQVQVRGPADLGMTEDVNLANRSGVGPFSTLLGWFGNAQLGPIYLGSLGVLSLFSGLMWFFTIGIWFWYQAGW
NPAVFLRDLFFFSLEPPAPEYGLSFAAPLKEGGLWLIASFFMFVAVWSWWGRTYLRAQALGMGKHTAWAFLSAIWLWMVL
GFIRPILMGSWSEAVPYGIFSHLDWTNNFSLVHGNLFYNPFHGLSIAFLYGSALLFAMHGATILAVSRFGGERELEQIAD
RGTAAERAALFWRWTMGFNATMEGIHRWAIWMAVLVTLTGGIGILLSGTVVDNWYVWGQNHGMAPLN</string>
                    <external_references type="UNIPROTKB">Q3J1A6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>PufZ</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0035173229999999997</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MAYMFGIIVFLAMLAVCWFGFMAAERQAGRL</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="7">
                <name>PufY</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.005126067</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>EVSEFAFRLMMAAVIFVGVGIMFAFAGGHWFVGLVVGGLVAAFFAATPN</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="8">
                <name>PufX</name>
                <natural_source database="NCBI">
                    <organism ncbi="272943">Cereibacter sphaeroides 2.4.1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.006024157</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>PKTNLRLWVAFQMMKGAGWAGGVFFGTLLLIGFFRVVGRMLPIQENQAPAPNITG</string>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="9">
                <name>BACTERIOCHLOROPHYLL A</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0009115039999999999</theoretical>
                </molecular_weight>
                <number_of_copies>64</number_of_copies>
                <formula>BCL</formula>
            </ligand>
            <ligand macromolecule_id="10">
                <name>3,4-DIHYDROSPHEROIDENE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0005709299999999999</theoretical>
                </molecular_weight>
                <number_of_copies>54</number_of_copies>
                <formula>SP2</formula>
            </ligand>
            <ligand macromolecule_id="11">
                <name>1,2-Distearoyl-sn-glycerophosphoethanolamine</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000748065</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>3PE</formula>
            </ligand>
            <ligand macromolecule_id="12">
                <name>(2R,5R,11R,14R)-5,8,11-trihydroxy-5,11-dioxido-17-oxo-2,14-bis(tetradecanoyloxy)-4,6,10,12,16-pentaoxa-5,11-diphosphatriacont-1-yl tetradecanoate</name>
                <molecular_weight>
                    <theoretical units="MDa">0.001241633</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>CD4</formula>
            </ligand>
            <ligand macromolecule_id="13">
                <name>UBIQUINONE-1</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00025028999999999996</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>UQ1</formula>
            </ligand>
            <ligand macromolecule_id="14">
                <name>UBIQUINONE-10</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0008633429999999999</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>U10</formula>
            </ligand>
            <ligand macromolecule_id="15">
                <name>BACTERIOPHEOPHYTIN A</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000889215</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>BPH</formula>
            </ligand>
            <ligand macromolecule_id="16">
                <name>1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0007951159999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>SQD</formula>
            </ligand>
            <ligand macromolecule_id="17">
                <name>DODECYL-BETA-D-MALTOSIDE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000510615</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>LMT</formula>
            </ligand>
            <ligand macromolecule_id="18">
                <name>FE (III) ION</name>
                <molecular_weight>
                    <theoretical units="MDa">5.5845e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>FE</formula>
            </ligand>
            <ligand macromolecule_id="19">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>144</number_of_copies>
                <formula>HOH</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">4.0</concentration>
                    <buffer>
                        <ph>7.8</ph>
                        <component>
                            <concentration units="mMol">20.0</concentration>
                            <formula>HEPES</formula>
                        </component>
                        <details>20 mM HEPES, pH 7.8, 0.03% beta-DDM</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>300</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">60</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">99</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <details>QF R1.2/1.3 300 mesh Cu grid. </details>
                    </vitrification>
                    <details>In 20 mM HEPES, pH 7.8,  0.03% beta-DDM buffer solution</details>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <c2_aperture_diameter units="µm">50.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.2</nominal_defocus_max>
                    <nominal_magnification>120000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <temperature>
                        <temperature_max units="K">80.0</temperature_max>
                    </temperature>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON IV (4k x 4k)</film_or_detector_model>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>5058</number_real_images>
                            <average_exposure_time units="s">12.21</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">45.36</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <particle_selection>
                    <number_selected>223786</number_selected>
                </particle_selection>
                <startup_model type_of_model="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>7PIL</pdb_id>
                    </pdb_model>
                </startup_model>
                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>C2</point_group>
                    </applied_symmetry>
                    <algorithm>BACK PROJECTION</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">2.9</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                    <number_images_used>58945</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <number_classes>4</number_classes>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </final_three_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="536871">
        <file>emd_13590.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>512</col>
            <row>512</row>
            <sec>512</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>512</x>
            <y>512</y>
            <z>512</z>
        </spacing>
        <cell>
            <a units="Å">332.8</a>
            <b units="Å">332.8</b>
            <c units="Å">332.8</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-0.11344796</minimum>
            <maximum>0.21005328</maximum>
            <average>0.00032892064</average>
            <std>0.004754529</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.65</x>
            <y units="Å">0.65</y>
            <z units="Å">0.65</z>
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        <contour_list>
            <contour primary="true">
                <level>0.0222</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-13590::::</label>
        <annotation_details>light harvesting core complex</annotation_details>
    </map>
</emd>
