<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-3391" 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>2016-03-16</deposition>
         <header_release>2016-03-23</header_release>
         <map_release>2016-07-13</map_release>
         <update>2018-06-06</update>
      </key_dates>
      <title>Negative-stain electron microscopy structure of human cytomegalovirus gHgLgO trimer</title>
      <authors_list>
         <author>Kabanova A</author>
         <author>Marcandalli J</author>
         <author>Zhou T</author>
         <author>Bianchi S</author>
         <author>Baxa U</author>
         <author>Tsybovsky Y</author>
         <author>Lilleri D</author>
         <author>Silacci-Fregni C</author>
         <author>Foglierini M</author>
         <author>Fernandez-Rodriguez BM</author>
         <author>Druz A</author>
         <author>Zhang B</author>
         <author>Geiger R</author>
         <author>Pagani M</author>
         <author>Sallusto F</author>
         <author>Kwong PD</author>
         <author>Corti D</author>
         <author>Lanzavecchia A</author>
         <author>Perez L</author>
      </authors_list>
      <keywords>gHgLgO, human cytomegalovirus</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Kabanova A</author>
               <author order="2">Marcandalli J</author>
               <author order="3">Zhou T</author>
               <author order="4">Bianchi S</author>
               <author order="5">Baxa U</author>
               <author order="6">Tsybovsky Y</author>
               <author order="7">Lilleri D</author>
               <author order="8">Silacci-Fregni C</author>
               <author order="9">Foglierini M</author>
               <author order="10">Fernandez-Rodriguez BM</author>
               <author order="11">Druz A</author>
               <author order="12">Zhang B</author>
               <author order="13">Geiger R</author>
               <author order="14">Pagani M</author>
               <author order="15">Sallusto F</author>
               <author order="16">Kwong PD</author>
               <author order="17">Corti D</author>
               <author order="18">Lanzavecchia A</author>
               <author order="19">Perez L</author>
               <title>Platelet-derived growth factor-alpha receptor is the cellular receptor for human cytomegalovirus gHgLgO trimer</title>
               <journal>Nature Microbiology</journal>
               <volume>2016</volume>
               <first_page>16082</first_page>
               <year>2016</year>
               <external_references type="PUBMED">27573107</external_references>
               <external_references type="DOI">doi:10.1038/nmicrobiol.2016.82</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
   </crossreferences>
   <sample>
      <name>Human cytomegalovirus gHgLgO trimer</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>Human cytomegalovirus gHgLgO trimer</name>
            <oligomeric_state>Heterotrimer (one gH + one gL + one gO)</oligomeric_state>
            <number_unique_components>3</number_unique_components>
            <molecular_weight>
               <experimental units="MDa">0.39</experimental>
               <theoretical units="MDa">0.17</theoretical>
               <method>Size exclusion chromatography</method>
            </molecular_weight>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name synonym="gH, UL75">Envelope glycoprotein H</name>
            <natural_source database="NCBI">
               <organism ncbi="10359">Human herpesvirus 5</organism>
               <strain>VR1814</strain>
               <synonym_organism>HCMV</synonym_organism>
            </natural_source>
            <molecular_weight>
               <theoretical units="MDa">0.085</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <oligomeric_state>Heterotrimeric with gL and gO</oligomeric_state>
            <recombinant_exp_flag>true</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               <recombinant_organism>Chinese Hamster Ovary cells</recombinant_organism>
               <recombinant_cell>CHO K1SV</recombinant_cell>
               <recombinant_plasmid>PEE.12.4 and PEE6.4</recombinant_plasmid>
            </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">D2K4W8</external_references>
               <external_references type="GO">GO:0016020</external_references>
               <external_references type="GO">GO:0016021</external_references>
               <external_references type="GO">GO:0019031</external_references>
               <external_references type="INTERPRO">IPR003493</external_references>
            </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="2">
            <name synonym="gO, UL74">Envelope glycoprotein O</name>
            <natural_source database="NCBI">
               <organism ncbi="10359">Human herpesvirus 5</organism>
               <strain>VR1814</strain>
               <synonym_organism>HCMV</synonym_organism>
            </natural_source>
            <molecular_weight>
               <theoretical units="MDa">0.054</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <oligomeric_state>Heterotrimeric with gL and gH</oligomeric_state>
            <recombinant_exp_flag>true</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               <recombinant_organism>Chinese Hamster Ovary cells</recombinant_organism>
               <recombinant_cell>CHO K1SV</recombinant_cell>
               <recombinant_plasmid>PEE.12.4 and PEE6.4</recombinant_plasmid>
            </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">Q8BCU3</external_references>
               <external_references type="GO">GO:0019031</external_references>
               <external_references type="INTERPRO">IPR012564</external_references>
            </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="3">
            <name synonym="gL, UL115">Envelope glycoprotein L</name>
            <natural_source database="NCBI">
               <organism ncbi="10359">Human herpesvirus 5</organism>
               <strain>VR1814</strain>
               <synonym_organism>HCMV</synonym_organism>
            </natural_source>
            <molecular_weight>
               <theoretical units="MDa">0.03</theoretical>
            </molecular_weight>
            <number_of_copies>1</number_of_copies>
            <oligomeric_state>Heterotrimeric with gH and gO</oligomeric_state>
            <recombinant_exp_flag>true</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               <recombinant_organism>Chinese Hamster Ovary cells</recombinant_organism>
               <recombinant_cell>CHO K1SV</recombinant_cell>
               <recombinant_plasmid>PEE.12.4 and PEE6.4</recombinant_plasmid>
            </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">A8T7J6</external_references>
               <external_references type="GO">GO:0016032</external_references>
               <external_references type="GO">GO:0019031</external_references>
               <external_references type="INTERPRO">IPR002689</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">0.01</concentration>
               <buffer>
                  <ph>7.5</ph>
                  <details>20 mM HEPES, 150 mM NaCl</details>
               </buffer>
               <staining>
                  <type>NEGATIVE</type>
                  <details>The complex was adsorbed to freshly glow-discharged carbon-coated grids for 15 s,
washed with a buffer containing 20 mM HEPES, pH 7.5, and 150 mM NaCl, and
stained in several drops of 0.7% uranyl formate</details>
               </staining>
               <grid>
                  <details>200 mesh copper grid with carbon support, glow discharged</details>
               </grid>
               <vitrification>
                  <cryogen_name>NONE</cryogen_name>
                  <instrument>OTHER</instrument>
               </vitrification>
            </single_particle_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <single_particle_microscopy microscopy_id="1">
               <microscope>FEI TECNAI 20</microscope>
               <illumination_mode>FLOOD BEAM</illumination_mode>
               <imaging_mode>BRIGHT FIELD</imaging_mode>
               <electron_source>LAB6</electron_source>
               <acceleration_voltage units="kV">200</acceleration_voltage>
               <nominal_cs units="mm">2.0</nominal_cs>
               <nominal_defocus_min units="&#181;m">0.4</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">0.9</nominal_defocus_max>
               <nominal_magnification>100000.0</nominal_magnification>
               <specimen_holder_model>SIDE ENTRY, EUCENTRIC</specimen_holder_model>
               <alignment_procedure>
                  <legacy>
                     <astigmatism>Objective lens astigmatism was corrected at 100,000 times magnification</astigmatism>
                  </legacy>
               </alignment_procedure>
               <date>2015-06-18</date>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="CCD">FEI EAGLE (2k x 2k)</film_or_detector_model>
                     <number_real_images>304</number_real_images>
                  </image_recording>
               </image_recording_list>
               <specimen_holder>Room temperature</specimen_holder>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <details>The dataset was subjected to iterative stable alignment and clustering (ISAC) in SPARX. The
ISAC classes were then used to generate an initial 3D map in EMAN2, which was
used as the initial model for three-dimensional reconstruction and refinement using
reference projections in SPIDER.</details>
            <ctf_correction>
               <details>Each defocus group</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>C1</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">19.3</resolution>
               <resolution_method>OTHER</resolution_method>
               <software_list>
                  <software>
                     <name>SPARX, EMAN2, SPIDER</name>
                  </software>
               </software_list>
               <number_images_used>10356</number_images_used>
            </final_reconstruction>
            <final_two_d_classification>
               <number_classes>37</number_classes>
            </final_two_d_classification>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
   <map format="CCP4" size_kbytes="16001">
      <file>emd_3391.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>160</col>
         <row>160</row>
         <sec>160</sec>
      </dimensions>
      <origin>
         <col>0</col>
         <row>0</row>
         <sec>0</sec>
      </origin>
      <spacing>
         <x>160</x>
         <y>160</y>
         <z>160</z>
      </spacing>
      <cell>
         <a units="&#8491;">355.2</a>
         <b units="&#8491;">355.2</b>
         <c units="&#8491;">355.2</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>-0.03685422</minimum>
         <maximum>0.09676909</maximum>
         <average>-0.00000286</average>
         <std>0.00604573</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">2.22</x>
         <y units="&#8491;">2.22</y>
         <z units="&#8491;">2.22</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>0.027</level>
            <source>AUTHOR</source>
         </contour>
      </contour_list>
      <annotation_details>The correct handedness for this complex was unknown at the time of deposition</annotation_details>
      <details>::::EMDATABANK.org::::EMD-3391::::</details>
   </map>
</emd>