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                        <revision_type>INITIAL_RELEASE</revision_type>
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        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2022-07-04</deposition>
            <header_release>2022-12-28</header_release>
            <map_release>2022-12-28</map_release>
            <update>2026-03-18</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Biotechnology and Biological Sciences Research Council (BBSRC)</funding_body>
                <code>BB/L014130/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Biotechnology and Biological Sciences Research Council (BBSRC)</funding_body>
                <code>BBS/E/J/000PR9794</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>108466/Z/15/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Nudaurelia capensis omega virus maturation intermediate captured at pH5.6 (insect cell expressed VLPs): small class from symmetry expansion</title>
        <authors_list>
            <author>Castells-Graells R</author>
            <author>Hesketh EL</author>
            <author>Johnson JE</author>
            <author>Ranson NA</author>
            <author>Lawson DM</author>
            <author>Lomonossoff GP</author>
        </authors_list>
        <keywords>ICOSAHEDRAL VIRUS, AUTO-CATALYTIC CLEAVAGE, VIRUS MATURATION, VIRUS-LIKE PARTICLE, VIRUS LIKE PARTICLE</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Castells-Graells R</author>
                    <author order="2">Hesketh EL</author>
                    <author order="3">Matsui T</author>
                    <author ORCID="0000-0001-9782-3721" order="4">Johnson JE</author>
                    <author ORCID="0000-0002-3640-5275" order="5">Ranson NA</author>
                    <author ORCID="0000-0002-7637-4303" order="6">Lawson DM</author>
                    <author order="7">Lomonossoff GP</author>
                    <title>Unraveling the maturation pathway of a eukaryotic virus through cryo-EM.</title>
                    <journal_abbreviation>Proc.Natl.Acad.Sci.USA</journal_abbreviation>
                    <country>US</country>
                    <volume>123</volume>
                    <first_page>e2420493123</first_page>
                    <last_page>e2420493123</last_page>
                    <year>2026</year>
                    <external_references type="PUBMED">41739563</external_references>
                    <external_references type="DOI">doi:10.1073/pnas.2420493123</external_references>
                    <external_references type="ISSN">1091-6490</external_references>
                    <external_references type="CSD">0040</external_references>
                    <external_references type="ASTM">PNASA6</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>8aay</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
        <other_db_list>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-15307</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Nudaurelia capensis omega virus maturation intermediate captured at pH5.6 (insect cell expressed VLPs): small class from symmetry expansion</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Nudaurelia capensis omega virus</name>
        <supramolecule_list>
            <virus_supramolecule supramolecule_id="1">
                <name>Nudaurelia capensis omega virus</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>expressed in Spodoptera frugiperda Sf21 cells</details>
                <sci_species_name ncbi="12541">Nudaurelia capensis omega virus</sci_species_name>
                <natural_host database="NCBI">
                    <organism ncbi="2059211">Gonimbrasia cytherea</organism>
                </natural_host>
                <molecular_weight>
                    <theoretical units="MDa">16.76</theoretical>
                </molecular_weight>
                <virus_shell shell_id="1">
                    <name>coat</name>
                    <diameter units="Å">415.0</diameter>
                    <triangulation>4</triangulation>
                </virus_shell>
                <virus_type>VIRUS-LIKE PARTICLE</virus_type>
                <virus_isolate>OTHER</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>false</virus_empty>
            </virus_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>p70</name>
                <natural_source database="NCBI">
                    <organism ncbi="12541">Nudaurelia capensis omega virus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.06989195299999999</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7108">Spodoptera frugiperda</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDSNSASGKRRSRNVRIAANTVNVAPKQRQARGRRARSRANNIDNVTAAAQELGQSLDANVITFPTNVATMPEFRSWARG
KLDIDQDSIGWYFKYLDPAGATESARAVGEYSKIPDGLVKFSVDAEIREIYNEECPTVSDASIPLDGAQWSLSIISYPMF
RTAYFAVANVDNKEISLDVTNDLIVWLNNLASWRDVVDSGQWFTFSDDPTWFVRIRVLHPTYDLPDPTEGLLRTVSDYRL
TYKSITCEANMPTLVDQGFWIGGHYALTPIATTQNAVEGSGFVHPFNVTRPGIAAGVTLTWASMPPGGSAPSGDPAWIPD
STTQFQWRHGGFDAPTGVITYTIPRGYTMQYFDTTTNEWNGFANPDDVVTFGQTGGAAGTNATITITAPTVTLTILATTT
SAANVINFRNLDAETTAASNRSEVPLPPLTFGQTAPNNPKIEQTLVKDTLGSYLVHSKMRNPVFQLTPASSFGAISFTNP
GFDRNLDLPGFGGIRDSLDVNMSTAVCHFRSLSKSCSIVTKTYQGWEGVTNVNTPFGQFAHSGLLKNDEILCLADDLATR
LTGVYGATDNFAAAVLAFAANMLTSVLKSEATTSVIKELGNQATGLANQGLARLPGLLASIPGKIAARVRARRDRRRAAR
MNNN</string>
                    <external_references type="UNIPROTKB">Q4TVS9</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">
                    <concentration units="mg/mL">0.3</concentration>
                    <buffer>
                        <ph>5.6</ph>
                    </buffer>
                    <grid>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </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>
                    <c2_aperture_diameter units="µm">70.0</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">2.5</nominal_defocus_max>
                    <nominal_magnification>75000.0</nominal_magnification>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON III (4k x 4k)</film_or_detector_model>
                            <detector_mode>INTEGRATING</detector_mode>
                            <number_grids_imaged>2</number_grids_imaged>
                            <number_real_images>16478</number_real_images>
                            <average_exposure_time units="s">1.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">49.1</average_electron_dose_per_image>
                            <details>Reconstructed from 2 datasets collected at doses of 48.7 and 50.4 electrons per Angstrom squared, respectively. The average of these two values is given.</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <ctf_correction>
                    <software_list>
                        <software>
                            <name>Gctf</name>
                            <version>1.06</version>
                        </software>
                    </software_list>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>7ANM</pdb_id>
                    </pdb_model>
                </startup_model>
                <final_reconstruction>
                    <applied_symmetry>
                        <point_group>C1</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">3.39</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0.3</version>
                        </software>
                    </software_list>
                    <details>Particles from an I1 icosahedral consensus map (EMD-15266) were symmetry expanded to C1 and further 3D classified without alignment using a soft mask covering the icosahedral asymmetric unit. The particles for this class were randomly split into half sets for the subsequent reconstruction and postprocessing steps. Note that the symmetry expansion step generates a 60-fold larger particle stack.</details>
                    <number_images_used>353898</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0.3</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0.3</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.0.3</version>
                        </software>
                    </software_list>
                </final_three_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <symmetry>
            <space_group>1</space_group>
        </symmetry>
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        <dimensions>
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            <row>512</row>
            <sec>512</sec>
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        <spacing>
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            <y>512</y>
            <z>512</z>
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            <a units="Å">766.80194</a>
            <b units="Å">766.80194</b>
            <c units="Å">766.80194</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>
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        <statistics>
            <minimum>-0.11339517</minimum>
            <maximum>0.21590076</maximum>
            <average>-0.00043386282</average>
            <std>0.00838166</std>
        </statistics>
        <pixel_spacing>
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                <level>0.025</level>
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            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-15307::::</label>
        <annotation_details>Postprocessed map from Relion</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>7ANM</access_code>
                    <chain>
                        <source_name>PDB</source_name>
                        <initial_model_type>experimental model</initial_model_type>
                    </chain>
                </initial_model>
                <refinement_protocol>OTHER</refinement_protocol>
                <target_criteria>Correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
                <overall_bvalue>78.0</overall_bvalue>
            </modelling>
        </modelling_list>
        <segmentation_list>
            <segmentation>
                <file>emd_15307_msk_1.map</file>
            </segmentation>
        </segmentation_list>
        <half_map_list>
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                <file>emd_15307_half_map_1.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>
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                    <row>0</row>
                    <sec>0</sec>
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                    <y>512</y>
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                    <a units="Å">766.80194</a>
                    <b units="Å">766.80194</b>
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                    <gamma units="deg">90.0</gamma>
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                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
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                    <maximum>0.10485804</maximum>
                    <average>-0.00043406326</average>
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                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-15307::::</label>
                <annotation_details>Refine3D half map 1 from Relion</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="536871">
                <file>emd_15307_half_map_2.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>
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                    <row>0</row>
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                    <x>512</x>
                    <y>512</y>
                    <z>512</z>
                </spacing>
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                    <a units="Å">766.80194</a>
                    <b units="Å">766.80194</b>
                    <c units="Å">766.80194</c>
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                    <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>-0.04514629</minimum>
                    <maximum>0.10151253</maximum>
                    <average>-0.00043366238</average>
                    <std>0.0059410227</std>
                </statistics>
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                    <x units="Å">1.49766</x>
                    <y units="Å">1.49766</y>
                    <z units="Å">1.49766</z>
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                <contour_list>
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                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-15307::::</label>
                <annotation_details>Refine3D half map 2 from Relion</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
