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    <admin>
        <current_status>
            <date>2024-11-06</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2023-08-22</deposition>
            <header_release>2024-06-12</header_release>
            <map_release>2024-06-12</map_release>
            <update>2024-11-06</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Medical Research Council (MRC, United Kingdom)</funding_body>
                <code>MR/P010393/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Leverhulme Trust</funding_body>
                <code>RPG-2015-090</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of Cx26 solubilised in LMNG: classification on subunit A; NFlex conformation</title>
        <authors_list>
            <author ORCID="0000-0001-8750-8496">Brotherton DH</author>
            <author ORCID="0000-0003-3354-6483">Savva CG</author>
            <author ORCID="0000-0001-8776-3518">Cameron AD</author>
        </authors_list>
        <keywords>Gap junction Large Pore Channel Carbon dioxide sensitive, MEMBRANE PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Brotherton DH</author>
                    <author order="2">Nijjar S</author>
                    <author order="3">Savva CG</author>
                    <author ORCID="0000-0003-2196-2949" order="4">Dale N</author>
                    <author ORCID="0000-0001-8776-3518" order="5">Cameron AD</author>
                    <title>Structures of wild-type and a constitutively closed mutant of connexin26 shed light on channel regulation by CO 2.</title>
                    <journal_abbreviation>Elife</journal_abbreviation>
                    <country>US</country>
                    <volume>13</volume>
                    <year>2024</year>
                    <external_references type="PUBMED">38829031</external_references>
                    <external_references type="DOI">doi:10.7554/eLife.93686</external_references>
                    <external_references type="ISSN">2050-084X</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author order="6">Brotherton DH</author>
                    <author order="7">Nijjar S</author>
                    <author order="8">Savva CG</author>
                    <author order="9">Dale N</author>
                    <author order="10">Cameron AD</author>
                    <title>Structures of wild-type and a constitutively closed mutant of connexin26 shed light on channel regulation by CO2</title>
                    <journal_abbreviation>Elife</journal_abbreviation>
                    <country>US</country>
                    <volume>13:RP93686</volume>
                    <year>2024</year>
                    <external_references type="DOI">doi:10.1101/2023.08.22.554292</external_references>
                    <external_references type="ISSN">2050-084X</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>8qa3</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Connexin 26, 90mmHg PCO2, pH7.4, solubilised in LMNG.</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Connexin 26, 90mmHg PCO2, pH7.4, solubilised in LMNG.</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Gap junction beta-2 protein</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.026713673999999996</theoretical>
                </molecular_weight>
                <details>connexin 26 subunit</details>
                <number_of_copies>12</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7108">Spodoptera frugiperda</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDWGTLQTILGGVNKHSTSIGKIWLTVLFIFRIMILVVAAKEVWGDEQADFVCNTLQPGCKNVCYDHYFPISHIRLWALQ
LIFVSTPALLVAMHVAYRRHEKKRKFIKGEIKSEFKDIEEIKTQKVRIEGSLWWTYTSSIFFRVIFEAAFMYVFYVMYDG
FSMQRLVKCNAWPCPNTVDCFVSRPTEKTVFTVFMIAVSGICILLNVTELCYLLIRYCSGKSKKPVLVPR</string>
                    <external_references type="UNIPROTKB">P29033</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>PHOSPHATIDYLETHANOLAMINE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0007340389999999999</theoretical>
                </molecular_weight>
                <number_of_copies>12</number_of_copies>
                <formula>PTY</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>254</number_of_copies>
                <formula>HOH</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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        <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">3.7</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <component>
                            <concentration units="mM">70.0</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="%">5.0</concentration>
                            <formula>C3H8O3</formula>
                            <name>glycerol</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <formula>C4H10O2S2</formula>
                            <name>DTT</name>
                        </component>
                        <component>
                            <concentration units="%">0.003</concentration>
                            <formula>C47H88O22</formula>
                            <name>LMNG</name>
                        </component>
                        <component>
                            <concentration units="mM">80.0</concentration>
                            <formula>NaH2P04</formula>
                            <name>sodium hydrogen carbonate</name>
                        </component>
                        <component>
                            <concentration units="mM">3.0</concentration>
                            <formula>KCl</formula>
                            <name>potassium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <formula>MgSO4</formula>
                            <name>magnesium sulphate</name>
                        </component>
                        <component>
                            <concentration units="mM">4.0</concentration>
                            <formula>MgCl2</formula>
                            <name>magnesium chloride</name>
                        </component>
                        <details>The buffer, except LMNG and DTT, was prepared fresh from 10x stock on day of used. The basal buffer was filtered and degassed and DDM and DTT added. The buffer was pH corrected at point of use to pH 7.4 using 15% CO2 in 85% N2.</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE-PROPANE</cryogen_name>
                        <instrument>FEI VITROBOT MARK I</instrument>
                        <details>Blot 3 seconds, force 10, 1 blot, skip transfer. 3ul sample, in 15% CO2/85%N2 atmosphere. </details>
                    </vitrification>
                </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>
                    <nominal_defocus_min units="µm">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.3000000000000003</nominal_defocus_max>
                    <nominal_magnification>105000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <specialist_optics>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                        </energy_filter>
                    </specialist_optics>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <number_real_images>11362</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">43.0</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>7652471</number_selected>
                </particle_selection>
                <startup_model type_of_model="OTHER"/>
                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>C1</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">2.3</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>4</version>
                        </software>
                    </software_list>
                    <details>Particles were symmetry expanded before classification</details>
                    <number_images_used>357859</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>PROJECTION MATCHING</type>
                    <projection_matching_processing/>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>PROJECTION MATCHING</type>
                    <projection_matching_processing/>
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                    <number_classes>8</number_classes>
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                        <software>
                            <name>RELION</name>
                            <version>4</version>
                        </software>
                    </software_list>
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    </structure_determination_list>
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