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            <deposition>2021-08-13</deposition>
            <header_release>2021-11-03</header_release>
            <map_release>2021-11-03</map_release>
            <update>2025-05-21</update>
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            <grant_reference>
                <funding_body>National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)</funding_body>
                <code>AI094386/DE028583/DE025567</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of bluetongue virus capsid protein VP5 at low endosomal pH</title>
        <authors_list>
            <author>Xia X</author>
            <author>Wu WN</author>
        </authors_list>
        <keywords>Bluetongue virus, capsid, membrane penetration, VP5, VIRAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-9833-5017" order="1">Xia X</author>
                    <author order="2">Wu W</author>
                    <author order="3">Cui Y</author>
                    <author ORCID="0000-0001-6535-6911" order="4">Roy P</author>
                    <author ORCID="0000-0002-8373-4717" order="5">Zhou ZH</author>
                    <title>Bluetongue virus capsid protein VP5 perforates membranes at low endosomal pH during viral entry.</title>
                    <journal_abbreviation>Nat Microbiol</journal_abbreviation>
                    <country>UK</country>
                    <volume>6</volume>
                    <first_page>1424</first_page>
                    <last_page>1432</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34702979</external_references>
                    <external_references type="DOI">doi:10.1038/s41564-021-00988-8</external_references>
                    <external_references type="ISSN">2058-5276</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-24685</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>IMS2</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-24686</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>IMS1</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-24687</emdb_id>
                <relationship>
                    <other>other EM volume</other>
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                <details>IMS3</details>
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        <name>Bluetongue virus (serotype 1 / isolate South Africa)</name>
        <supramolecule_list>
            <virus_supramolecule supramolecule_id="1">
                <name>Bluetongue virus (serotype 1 / isolate South Africa)</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>The virus was generated from BHK-21 cell and purified by sucrose gradient.</details>
                <sci_species_name ncbi="10905">Bluetongue virus (serotype 1 / isolate South Africa)</sci_species_name>
                <sci_species_strain>BTV-1</sci_species_strain>
                <natural_host database="NCBI">
                    <organism>sheep</organism>
                </natural_host>
                <virus_shell shell_id="1">
                    <diameter units="Å">880.0</diameter>
                </virus_shell>
                <virus_type>VIRION</virus_type>
                <virus_isolate>SPECIES</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>true</virus_empty>
            </virus_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Outer capsid protein VP5</name>
                <natural_source database="NCBI">
                    <organism ncbi="10905">Bluetongue virus (serotype 1 / isolate South Africa)</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.059070370999999997</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MGKVIRSLNRFGKKVGNALTSNTAKKIYSTIGKAAERFAESEIGSAAIDGLVQGSVHSIITGESYGESVKQAVLLNVLGS
GEEIPDPLSPGERGIQAKLKELEDEQRNELVRLKYNDKIKEKFGKELEEVYNFMNGEANAEIEDEKQFDILNKAVTSYNK
ILTEEDLQMRRLATALQKEIGERTHAETVMVKEYRDKIDALKNAIEVERDGMQEEAIQEIAGMTADVLEAASEEVPLIGA
GMATAVATGRAIEGAYKLKKVINALSGIDLTHLRTPKIEPSVVSTILEYRAKEIPDNALAVSVLSKNRAIQENHKELMHI
KNEILPRFKKAMDEEKEICGIEDKVIHPKVMMKFKIPRAQQPQIHVYSAPWDSDDVFFFHCISHHHANESFFLGFDLSID
LVHYEDLTAHWHALGAAQTAAGRTLTEAYREFLNLAISNAFGTQMHTRRLVRSKTVHPIYLGSLHYDISFSDLRGNAQRI
VYDDELQMHILRGPIHFQRRAILGALKFGCKVLGDRLDVPLFLRNA</string>
                    <external_references type="UNIPROTKB">K7QP12</external_references>
                </sequence>
            </protein_or_peptide>
        </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">
                    <buffer>
                        <ph>5.5</ph>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <name>sodium citrate</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>PELCO Ultrathin Carbon with Lacey Carbon</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>CONTINUOUS</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">30</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                </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>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_magnification>105000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
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                        <energy_filter>
                            <name>GIF Quantum LS</name>
                            <slit_width units="eV">20</slit_width>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <detector_mode>SUPER-RESOLUTION</detector_mode>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>3609</number_real_images>
                            <average_exposure_time units="s">8.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">50.0</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>913440</number_selected>
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                <ctf_correction>
                    <type>PHASE FLIPPING ONLY</type>
                </ctf_correction>
                <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">3.4</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>572331</number_images_used>
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                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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                <final_three_d_classification>
                    <number_classes>5</number_classes>
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                            <version>3.1</version>
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        <dimensions>
            <col>300</col>
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        <cell>
            <a units="Å">408.0</a>
            <b units="Å">408.0</b>
            <c units="Å">408.0</c>
            <alpha units="deg">90.0</alpha>
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        <annotation_details>Cryo-EM structure of Bluetongue virus at low endosomal pH</annotation_details>
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                <initial_model>
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                <refinement_protocol>OTHER</refinement_protocol>
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