<emd emdb_id="EMD-6423" 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>2015-08-11</deposition>
            <header_release>2015-09-23</header_release>
            <map_release>2015-10-07</map_release>
            <update>2015-11-25</update>
        </key_dates>
        <title>The U4 antibody epitope on human papillomavirus 16 identified by cryo-EM</title>
        <authors_list>
            <author>Guan J</author>
            <author>Bywaters SM</author>
            <author>Brendle SA</author>
            <author>Lee H</author>
            <author>Ashley RE</author>
            <author>Christensen ND</author>
            <author>Hafenstein S</author>
        </authors_list>
        <keywords>HPV16, Cryo-EM, antibody, U4, neutralization, Fab</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Guan J</author>
                    <author order="2">Bywaters SM</author>
                    <author order="3">Brendle SA</author>
                    <author order="4">Lee H</author>
                    <author order="5">Ashley RE</author>
                    <author order="6">Christensen ND</author>
                    <author order="7">Hafenstein S</author>
                    <title>The U4 antibody epitope on human papillomavirus 16 identified by cryo-EM</title>
                    <journal>J.VIROL.</journal>
                    <volume>89</volume>
                    <first_page>12108</first_page>
                    <last_page>12117</last_page>
                    <year>2015</year>
                    <external_references type="PUBMED">26401038</external_references>
                    <external_references type="DOI">doi:10.1128/JVI.02020-15</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>Quasi-HPV16</name>
        <supramolecule_list>
            <sample_supramolecule supramolecule_id="1000">
                <name>Quasi-HPV16</name>
                <number_unique_components>1</number_unique_components>
                <molecular_weight>
                    <theoretical units="MDa">29.8</theoretical>
                </molecular_weight>
            </sample_supramolecule>
            <virus_supramolecule supramolecule_id="1">
                <name>Human papillomavirus type 16</name>
                <sci_species_name ncbi="333760">Human papillomavirus type 16</sci_species_name>
                <natural_host database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                    <synonym_organism>VERTEBRATES</synonym_organism>
                </natural_host>
                <host_system database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                    <recombinant_strain>HEK293TT</recombinant_strain>
                    <recombinant_plasmid>SV40</recombinant_plasmid>
                </host_system>
                <molecular_weight>
                    <theoretical units="MDa">29.8</theoretical>
                </molecular_weight>
                <virus_shell shell_id="1">
                    <name>L1 L2</name>
                    <diameter units="&#8491;">590</diameter>
                    <triangulation>7</triangulation>
                </virus_shell>
                <virus_type>VIRUS-LIKE PARTICLE</virus_type>
                <virus_isolate>SEROTYPE</virus_isolate>
                <virus_enveloped>false</virus_enveloped>
                <virus_empty>false</virus_empty>
                <sci_species_serotype>HPV16</sci_species_serotype>
            </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">1.0</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <details>1 M NaCl, 200 mM Tris</details>
                    </buffer>
                    <grid>
                        <details>glow-discharged holey carbon support grid</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">90</chamber_humidity>
                        <chamber_temperature units="K">102</chamber_temperature>
                        <instrument>GATAN CRYOPLUNGE 3</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>JEOL 2100</microscope>
                    <illumination_mode>SPOT SCAN</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>LAB6</electron_source>
                    <acceleration_voltage units="kV">200</acceleration_voltage>
                    <nominal_cs units="mm">2</nominal_cs>
                    <nominal_defocus_min units="&#181;m">0.84</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">3.05</nominal_defocus_max>
                    <nominal_magnification>80000.0</nominal_magnification>
                    <specimen_holder_model>GATAN LIQUID NITROGEN</specimen_holder_model>
                    <temperature>
                        <temperature_average units="K">95</temperature_average>
                    </temperature>
                    <date>2009-09-04</date>
                    <image_recording_list>
                        <image_recording>
                            <film_or_detector_model category="CCD">GATAN ULTRASCAN 4000 (4k x 4k)</film_or_detector_model>
                            <number_real_images>297</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 semi-automatic program e2boxer.py (EMAN2).</details>
                <ctf_correction>
                    <details>each particle</details>
                </ctf_correction>
                <final_reconstruction>
                    <algorithm>OTHER</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">13.0</resolution>
                    <resolution_method>OTHER</resolution_method>
                    <software_list>
                        <software>
                            <name>auto3dem, RELION, EMAN2</name>
                        </software>
                    </software_list>
                    <details>Semi-automatic particle selection was performed using e2boxer.py, followed by particle boxing, linearization, normalization, and apodization of the images using Robem. Defocus and astigmatism values for contrast transfer function (CTF) correction were assessed for the extracted particles using ctffind3. The icosahedrally-averaged reconstruction was initiated using a random model generated with setup_rmc and reached 13 A resolution (FSC 0.5, RELION).</details>
                    <number_images_used>1895</number_images_used>
                </final_reconstruction>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="432001">
        <file>emd_6423.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>480</col>
            <row>480</row>
            <sec>480</sec>
        </dimensions>
        <origin>
            <col>-240</col>
            <row>-240</row>
            <sec>-240</sec>
        </origin>
        <spacing>
            <x>480</x>
            <y>480</y>
            <z>480</z>
        </spacing>
        <cell>
            <a units="&#8491;">710.4</a>
            <b units="&#8491;">710.4</b>
            <c units="&#8491;">710.4</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>-2.01456308</minimum>
            <maximum>4.23273659</maximum>
            <average>0.00000001</average>
            <std>1.0</std>
        </statistics>
        <pixel_spacing>
            <x units="&#8491;">1.48</x>
            <y units="&#8491;">1.48</y>
            <z units="&#8491;">1.48</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>1.0</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <annotation_details>Quasi-HPV16</annotation_details>
        <details>::::EMDATABANK.org::::EMD-6423::::</details>
    </map>
</emd>