<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-2488" version="3.0.1.1" 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>PDBe</processing_site>
      </current_status>
      <sites>
         <deposition>PDBe</deposition>
         <last_processing>PDBe</last_processing>
      </sites>
      <key_dates>
         <deposition>2013-10-18</deposition>
         <header_release>2013-11-13</header_release>
         <map_release>2013-11-13</map_release>
         <update>2013-12-11</update>
      </key_dates>
      <title>Determination of protein structure at 8.5 Angstrom resolution using cryo-electron microscopy and subtomogram averaging</title>
      <authors_list>
         <author>Schur FKM</author>
         <author>Hagen W</author>
         <author>de Marco A</author>
         <author>Briggs JAG</author>
      </authors_list>
      <keywords>Cryo-electron Tomography, Sub-tomogram Averaging, Retrovirus, Capsid</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Schur FKM</author>
               <author order="2">Hagen W</author>
               <author order="3">de Marco A</author>
               <author order="4">Briggs JAG</author>
               <title>Determination of protein structure at 8.5 Angstrom resolution using cryo-electron microscopy and subtomogram averaging</title>
               <journal>J.STRUCT.BIOL.</journal>
               <volume>184</volume>
               <first_page>394</first_page>
               <last_page>400</last_page>
               <year>2013</year>
               <external_references type="PUBMED">24184468</external_references>
               <external_references type="DOI">doi:10.1016/j.jsb.2013.10.015</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
   </crossreferences>
   <sample>
      <name>M-MPV CANC Gag dimer</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>M-MPV CANC Gag dimer</name>
            <oligomeric_state>helical</oligomeric_state>
            <number_unique_components>1</number_unique_components>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name>M-MPV dPro CANC protein</name>
            <natural_source database="NCBI">
               <organism ncbi="11855">Mason-Pfizer monkey virus</organism>
            </natural_source>
            <oligomeric_state>helical</oligomeric_state>
            <recombinant_exp_flag>true</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
            </recombinant_expression>
            <sequence>
               </sequence>
         </protein_or_peptide>
      </macromolecule_list>
   </sample>
   <structure_determination_list>
      <structure_determination structure_determination_id="1">
         <method>subtomogramAveraging</method>
         <aggregation_state>helicalArray</aggregation_state>
         <specimen_preparation_list>
            <subtomogram_averaging_preparation preparation_id="1">
               <buffer>
                  <ph>7.7</ph>
                  <details>50mM Tris, 100mM NaCl,1uM Zn</details>
               </buffer>
               <grid>
                  <details>300mesh copper, glow discharged</details>
               </grid>
               <vitrification>
                  <cryogen_name>ETHANE</cryogen_name>
                  <instrument>OTHER</instrument>
               </vitrification>
            </subtomogram_averaging_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <subtomogram_averaging_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">200</acceleration_voltage>
               <nominal_cs units="mm">2.7</nominal_cs>
               <nominal_defocus_min units="&#181;m">1.5</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">3.3</nominal_defocus_max>
               <nominal_magnification>42000.0</nominal_magnification>
               <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
               <specialist_optics>
                  <energy_filter>
                     <name>GIF2002 postcolumn energy filter</name>
                  </energy_filter>
               </specialist_optics>
               <date>2013-05-21</date>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="CCD">GENERIC GATAN (2k x 2k)</film_or_detector_model>
                     <average_electron_dose_per_image units="e/&#8491;^2">40</average_electron_dose_per_image>
                  </image_recording>
               </image_recording_list>
               <specimen_holder>Liquid nitrogen cooled</specimen_holder>
               <tilt_series>
                  <axis1>
                     <min_angle units="deg">-45</min_angle>
                     <max_angle units="deg">60</max_angle>
                  </axis1>
               </tilt_series>
            </subtomogram_averaging_microscopy>
         </microscopy_list>
         <subtomogram_averaging_processing image_processing_id="1">
            <details>Subtomogram averaging was performed using scripts derived from the TOM (Nickell et al, 2005) and AV3 (Foerster et al, 2005) packages.</details>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>C2</point_group>
               </applied_symmetry>
               <resolution res_type="BY AUTHOR" units="&#8491;">8.3</resolution>
               <resolution_method>OTHER</resolution_method>
               <software_list>
                  <software>
                     <name>TOM, AV3</name>
                  </software>
               </software_list>
               <details>Reconstruction carried out using sub-tomogram averaging</details>
               <number_subtomograms_used>121346</number_subtomograms_used>
            </final_reconstruction>
            <ctf_correction>
               <details>Phase flipping of individual tilts</details>
            </ctf_correction>
         </subtomogram_averaging_processing>
      </structure_determination>
   </structure_determination_list>
   <map format="CCP4" size_kbytes="2001">
      <file>emd_2488.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>80</col>
         <row>80</row>
         <sec>80</sec>
      </dimensions>
      <origin>
         <col>0</col>
         <row>0</row>
         <sec>0</sec>
      </origin>
      <spacing>
         <x>80</x>
         <y>80</y>
         <z>80</z>
      </spacing>
      <cell>
         <a units="&#8491;">162.0</a>
         <b units="&#8491;">162.0</b>
         <c units="&#8491;">162.0</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>-11.20072365</minimum>
         <maximum>13.58435822</maximum>
         <average>0.04363221</average>
         <std>1.54642045</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">2.025</x>
         <y units="&#8491;">2.025</y>
         <z units="&#8491;">2.025</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>5.28</level>
            <source>AUTHOR</source>
         </contour>
      </contour_list>
      <annotation_details>Reconstruction of the immature retroviral CANC Gag dimer</annotation_details>
      <details>::::EMDATABANK.org::::EMD-2488::::</details>
   </map>
   <interpretation>
      <figure_list>
         <figure>
            <file>emd_2488.tif</file>
         </figure>
      </figure_list>
   </interpretation>
</emd>