<emd emdb_id="EMD-5465" version="3.0.1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://github.com/emdb-empiar/emdb-schemas/blob/master/v3/v3_0_1_1/emdb_relaxed.xsd">
    <admin>
        <current_status>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2012-08-09</deposition>
            <header_release>2013-04-03</header_release>
            <map_release>2013-04-03</map_release>
            <update>2013-04-17</update>
        </key_dates>
        <title>Cryo-electron microscopy reconstruction of the Enterovirus 71 A-particle</title>
        <authors_list>
            <author>Shingler KL</author>
            <author>Yoder JL</author>
            <author>Carnegie MS</author>
            <author>Ashley RE</author>
            <author>Makhov AM</author>
            <author>Conway JF</author>
            <author>Hafenstein S</author>
        </authors_list>
        <keywords>Enterovirus 71, EV71, A-particle, 135S</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Shingler KL</author>
                    <author order="2">Yoder JL</author>
                    <author order="3">Carnegie MS</author>
                    <author order="4">Ashley RE</author>
                    <author order="5">Makhov AM</author>
                    <author order="6">Conway JF</author>
                    <author order="7">Hafenstein S</author>
                    <title>The enterovirus 71 A-particle forms a gateway to allow genome release: a cryoEM study of picornavirus uncoating.</title>
                    <journal>PLOS PATHOG.</journal>
                    <volume>9</volume>
                    <first_page>e1003240</first_page>
                    <last_page>e1003240</last_page>
                    <year>2013</year>
                    <external_references type="PUBMED">23555253</external_references>
                    <external_references type="DOI">doi:10.1371/journal.ppat.1003240</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>3j22</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Enterovirus 71 A-Particle</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Enterovirus 71 A-Particle</name>
                <details>The sample was purified mature virus heated in solution.</details>
                <oligomeric_state>icosahedral virus</oligomeric_state>
                <number_unique_components>1</number_unique_components>
                <molecular_weight>
                    <experimental units="MDa">7</experimental>
                    <theoretical units="MDa">7</theoretical>
                    <method>Calculation</method>
                </molecular_weight>
            </sample_supramolecule>
            <virus_supramolecule supramolecule_id="1">
                <name synonym="EV71, Hand foot and mouth disease virus">Human enterovirus 71</name>
                <details>purified virus in solution</details>
                <sci_species_name ncbi="39054">Human enterovirus 71</sci_species_name>
                <natural_host database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                    <synonym_organism>VERTEBRATES</synonym_organism>
                </natural_host>
                <host_system database="NCBI" />
                <molecular_weight>
                    <experimental units="MDa">7</experimental>
                    <theoretical units="MDa">7</theoretical>
                </molecular_weight>
                <virus_shell shell_id="1">
                    <name>single capsid shell</name>
                    <diameter units="&#8491;">300</diameter>
                    <triangulation>1</triangulation>
                </virus_shell>
                <virus_type>VIRION</virus_type>
                <virus_isolate>SEROTYPE</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>false</virus_empty>
                <syn_species_name>EV71, Hand foot and mouth disease virus</syn_species_name>
            </virus_supramolecule>
        </supramolecule_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">0.1</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <details>10 mM Tris-HCl, 20 mM NaCl, 5 mM MgCl2</details>
                    </buffer>
                    <grid>
                        <details>glow discharged holey carbon Quantifoil electron microscopy grids</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE-PROPANE MIXTURE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">76</chamber_temperature>
                        <instrument>FEI VITROBOT MARK III</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TECNAI F20</microscope>
                    <illumination_mode>SPOT SCAN</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">200</acceleration_voltage>
                    <nominal_cs units="mm">2</nominal_cs>
                    <nominal_defocus_min units="&#181;m">1.73</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">4.28</nominal_defocus_max>
                    <nominal_magnification>50000.0</nominal_magnification>
                    <calibrated_magnification>50000.0</calibrated_magnification>
                    <specimen_holder_model>GATAN LIQUID NITROGEN</specimen_holder_model>
                    <temperature>
                        <temperature_average units="K">95</temperature_average>
                    </temperature>
                    <alignment_procedure>
                        <legacy>
                            <astigmatism>CTFFIND3 (EMAN)</astigmatism>
                        </legacy>
                    </alignment_procedure>
                    <date>2012-04-17</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="FILM">KODAK SO-163 FILM</film_or_detector_model>
                            <digitization_details>
                                <scanner>NIKON SUPER COOLSCAN 9000</scanner>
                                <sampling_interval units="&#181;m">6.35</sampling_interval>
                            </digitization_details>
                            <number_real_images>40</number_real_images>
                            <average_electron_dose_per_image units="e/&#8491;^2">15</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <details>The particles were selected using an automatic selection program (EMAN).</details>
                <ctf_correction>
                    <details>auto3DEM</details>
                </ctf_correction>
                <final_reconstruction>
                    <algorithm>OTHER</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">6.3</resolution>
                    <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>EMAN2, auto3DEM</name>
                        </software>
                    </software_list>
                    <details>A single data set was used for the reconstruction</details>
                    <number_images_used>11436</number_images_used>
                </final_reconstruction>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="168922">
        <file>emd_5465.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>351</col>
            <row>351</row>
            <sec>351</sec>
        </dimensions>
        <origin>
            <col>-175</col>
            <row>-175</row>
            <sec>-175</sec>
        </origin>
        <spacing>
            <x>351</x>
            <y>351</y>
            <z>351</z>
        </spacing>
        <cell>
            <a units="&#8491;">445.77</a>
            <b units="&#8491;">445.77</b>
            <c units="&#8491;">445.77</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>-4.72561073</minimum>
            <maximum>6.55992079</maximum>
            <average>0.0</average>
            <std>0.99999994</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">1.27</x>
            <y units="&#8491;">1.27</y>
            <z units="&#8491;">1.27</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>1.0</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>Reconstruction of the Enterovirus 71 A-particle, produced by heat treating mature capsids in isotonic solution.</annotation_details>
        <details>::::EMDATABANK.org::::EMD-5465::::</details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>3VBU</access_code>
                    <chain>
                        <chain_id>A</chain_id>
                    </chain>
                    <chain>
                        <chain_id>B</chain_id>
                    </chain>
                    <chain>
                        <chain_id>C</chain_id>
                    </chain>
                </initial_model>
                <refinement_protocol>RIGID BODY FIT</refinement_protocol>
                <software_list>
                    <software>
                        <name>Chimera, Situs</name>
                    </software>
                </software_list>
                <details>Protocol: rigid body. One protomer was fit in Chimera, used to generate a full crystal map, then docked as a rigid body using Situs into the cryoEM density map.</details>
                <target_criteria>correlation coefficient</target_criteria>
                <refinement_space>REAL</refinement_space>
            </modelling>
        </modelling_list>
        <figure_list>
            <figure>
                <file>emd_5465.tif</file>
            </figure>
        </figure_list>
    </interpretation>
</emd>