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    <admin>
        <current_status>
            <date>2021-01-27</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2020-02-20</deposition>
            <header_release>2020-03-18</header_release>
            <map_release>2021-01-27</map_release>
            <update>2021-01-27</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01-67167</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)</funding_body>
                <code>R01-AI062520</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Helical reconstruction of HIV capsid protein</title>
        <authors_list>
            <author>Zhao H</author>
            <author>Iqbal N</author>
            <author>Vanblerkom P</author>
            <author>Asturias F</author>
            <author>Kvaratskhelia M</author>
        </authors_list>
    </admin>
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        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Bester SM</author>
                    <author order="2">Wei G</author>
                    <author order="3">Zhao H</author>
                    <author order="4">Adu-Ampratwum D</author>
                    <author order="5">Iqbal N</author>
                    <author order="6">Courouble VV</author>
                    <author order="7">Francis AC</author>
                    <author order="8">Annamalai AS</author>
                    <author order="9">Singh PK</author>
                    <author order="10">Shkriabai N</author>
                    <author order="11">Van Blerkom P</author>
                    <author order="12">Morrison J</author>
                    <author order="13">Poeschla EM</author>
                    <author order="14">Engelman AN</author>
                    <author order="15">Melikyan GB</author>
                    <author order="16">Griffin PR</author>
                    <author order="17">Fuchs JR</author>
                    <author order="18">Asturias FJ</author>
                    <author order="19">Kvaratskhelia M</author>
                    <title>Structural and mechanistic bases for a potent HIV-1 capsid inhibitor.</title>
                    <journal_abbreviation>Science</journal_abbreviation>
                    <country>US</country>
                    <volume>370</volume>
                    <first_page>360</first_page>
                    <last_page>364</last_page>
                    <year>2020</year>
                    <external_references type="PUBMED">33060363</external_references>
                    <external_references type="DOI">doi:10.1126/science.abb4808</external_references>
                    <external_references type="ISSN">1095-9203</external_references>
                    <external_references type="CSD">0038</external_references>
                    <external_references type="ASTM">SCIEAS</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-21424</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
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    </crossreferences>
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        <name>HIV capsid protein hexamer</name>
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                <name>HIV capsid protein hexamer</name>
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                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
            </complex_supramolecule>
        </supramolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>helical</method>
            <aggregation_state>helicalArray</aggregation_state>
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                <helical_preparation preparation_id="1">
                    <concentration units="mg/mL">3</concentration>
                    <buffer>
                        <ph>8.0</ph>
                        <details>1M NaCl, 50mM Tris pH 8.0</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">298</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                </helical_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <helical_microscopy microscopy_id="1">
                    <microscope>FEI TALOS ARCTICA</microscope>
                    <illumination_mode>FLOOD BEAM</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">200</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">1.2</nominal_defocus_min>
                    <calibrated_defocus_min units="µm">0.7</calibrated_defocus_min>
                    <nominal_defocus_max units="µm">2.5</nominal_defocus_max>
                    <calibrated_defocus_max units="µm">2.0</calibrated_defocus_max>
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                    <calibrated_magnification>28000.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <temperature>
                        <temperature_min units="K">70.0</temperature_min>
                        <temperature_max units="K">80.0</temperature_max>
                    </temperature>
                    <alignment_procedure>
                        <coma_free/>
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                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
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                                <dimensions>
                                    <width units="pixel">5760</width>
                                    <height units="pixel">4092</height>
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                            <number_grids_imaged>4</number_grids_imaged>
                            <number_real_images>4246</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">47.36</average_electron_dose_per_image>
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                        <helical_parameters>
                            <delta_z units="Å">7.61</delta_z>
                            <delta_phi units="deg">150.32</delta_phi>
                            <axial_symmetry>C1</axial_symmetry>
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                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">6.3</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                        </software>
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                    <number_images_used>24505</number_images_used>
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                        <software>
                            <name>CTFFIND</name>
                        </software>
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                </ctf_correction>
                <final_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </final_angle_assignment>
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            <a units="Å">560.0</a>
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            <beta units="deg">90.0</beta>
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                <level>0.01</level>
                <source>AUTHOR</source>
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        <label>::::EMDATABANK.org::::EMD-21424::::</label>
        <annotation_details>Helical reconstruction of HIV capsid protein</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <refinement_protocol>AB INITIO MODEL</refinement_protocol>
            </modelling>
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