<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-1881" 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>2011-02-21</deposition>
         <header_release>2011-05-13</header_release>
         <map_release>2011-05-13</map_release>
         <update>2012-09-26</update>
      </key_dates>
      <title>Mutually-induced conformational switching of RNA and coat protein underpins efficient assembly of a viral capsid.</title>
      <authors_list>
         <author>Rolfsson O</author>
         <author>Toropova K</author>
         <author>Ranson NA</author>
         <author>Stockley PG</author>
      </authors_list>
      <keywords>Bacteriophage MS2, virus assembly, quasi-equivalence, ssRNA virus</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Rolfsson O</author>
               <author order="2">Toropova K</author>
               <author order="3">Ranson NA</author>
               <author order="4">Stockley PG</author>
               <title>Mutually-induced conformational switching of RNA and coat protein underpins efficient assembly of a viral capsid.</title>
               <journal>J.MOL.BIOL.</journal>
               <volume>401</volume>
               <first_page>309</first_page>
               <last_page>322</last_page>
               <year>2010</year>
               <external_references type="PUBMED">20684044</external_references>
               <external_references type="DOI">doi:10.1016/j.jmb.2010.05.058</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
   </crossreferences>
   <sample>
      <name>Bacteriophage MS2 virus-like particles assembled in vitro from purified MS2 coat protein and internal genomic RNA fragments (nts 1419-2346)</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>Bacteriophage MS2 virus-like particles assembled in vitro from purified MS2 coat protein and internal genomic RNA fragments (nts 1419-2346)</name>
            <oligomeric_state>One capsid to one RNA</oligomeric_state>
            <number_unique_components>2</number_unique_components>
         </sample_supramolecule>
         <virus_supramolecule supramolecule_id="1">
            <name synonym="MS2">Enterobacterio phage MS2</name>
            <sci_species_name ncbi="12022">Enterobacterio phage MS2</sci_species_name>
            <natural_host database="NCBI">
               <organism ncbi="562">Escherichia coli</organism>
               <synonym_organism>BACTERIA(EUBACTERIA)</synonym_organism>
            </natural_host>
            <host_system database="NCBI">
               </host_system>
            <virus_shell shell_id="1">
               <diameter units="&#8491;">280</diameter>
               <triangulation>3</triangulation>
            </virus_shell>
            <virus_type>VIRUS-LIKE PARTICLE</virus_type>
            <virus_isolate>STRAIN</virus_isolate>
            <virus_enveloped>false</virus_enveloped>
            <virus_empty>false</virus_empty>
            <syn_species_name>MS2</syn_species_name>
         </virus_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <rna macromolecule_id="1">
            <name synonym="Single stranded MS2 RNA">Single stranded MS2 RNA</name>
            <natural_source database="NCBI">
               <organism ncbi="329852">Enterobacteria phage MS2</organism>
               <synonym_organism>MS2</synonym_organism>
            </natural_source>
            <details>1419-2346 was made by in vitro transcription from a cDNA template of the MS2 genome.</details>
            <classification>OTHER</classification>
            <structure>SINGLE STRANDED</structure>
            <synthetic_flag>true</synthetic_flag>
         </rna>
      </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>7.6</ph>
                  <details>50mM Tris-acetate, 1mM magnesium acetate, 40mM ammonium acetate</details>
               </buffer>
               <grid>
                  <details>Quantifoil R2/1 200 mesh holly carbon grid</details>
               </grid>
               <vitrification>
                  <cryogen_name>ETHANE</cryogen_name>
                  <instrument>HOMEMADE PLUNGER</instrument>
                  <details>Vitrification instrument: Double-sided custom pneumatic blotter</details>
                  <method>1.6s blot</method>
               </vitrification>
            </single_particle_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <single_particle_microscopy microscopy_id="1">
               <microscope>FEI TECNAI F20</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">2.0</nominal_cs>
               <nominal_magnification>50000.0</nominal_magnification>
               <calibrated_magnification>52750.0</calibrated_magnification>
               <specimen_holder_model>GATAN LIQUID NITROGEN</specimen_holder_model>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="FILM">KODAK SO-163 FILM</film_or_detector_model>
                     <digitization_details>
                        <scanner>OTHER</scanner>
                        <sampling_interval units="&#181;m">9.88</sampling_interval>
                     </digitization_details>
                     <average_electron_dose_per_image units="e/&#8491;^2">18</average_electron_dose_per_image>
                     <bits_per_pixel>16.</bits_per_pixel>
                  </image_recording>
               </image_recording_list>
               <specimen_holder>Side entry</specimen_holder>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <ctf_correction>
               <details>Phase flip each particle</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>I</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">16.0</resolution>
               <resolution_method>FSC 0.5 CUT-OFF</resolution_method>
               <software_list>
                  <software>
                     <name>Spider</name>
                  </software>
               </software_list>
               <number_images_used>1697</number_images_used>
            </final_reconstruction>
            <final_two_d_classification>
               <number_classes>53</number_classes>
            </final_two_d_classification>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
   <map format="CCP4" size_kbytes="31251">
      <file>emd_1881.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>200</col>
         <row>200</row>
         <sec>200</sec>
      </dimensions>
      <origin>
         <col>0</col>
         <row>0</row>
         <sec>0</sec>
      </origin>
      <spacing>
         <x>200</x>
         <y>200</y>
         <z>200</z>
      </spacing>
      <cell>
         <a units="&#8491;">374</a>
         <b units="&#8491;">374</b>
         <c units="&#8491;">374</c>
         <alpha units="deg">90</alpha>
         <beta units="deg">90</beta>
         <gamma units="deg">90</gamma>
      </cell>
      <axis_order>
         <fast>X</fast>
         <medium>Y</medium>
         <slow>Z</slow>
      </axis_order>
      <statistics>
         <minimum>-2.88696</minimum>
         <maximum>5.02921</maximum>
         <average>-0.00000000206313</average>
         <std>1.0</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">1.87</x>
         <y units="&#8491;">1.87</y>
         <z units="&#8491;">1.87</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>0.9</level>
            <source>AUTHOR</source>
         </contour>
      </contour_list>
      <annotation_details>This is a surface rendered view of a Bacteriophage MS2 virus-like particle composed of purified coat protein and internal genomic RNA fragments (nts 1419 -2346)</annotation_details>
      <details>::::EMDATABANK.org::::EMD-1881::::</details>
   </map>
</emd>