<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-1699" 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>2010-02-05</deposition>
         <header_release>2010-03-10</header_release>
         <map_release>2010-03-10</map_release>
         <update>2010-06-01</update>
      </key_dates>
      <title>Structure of Lactococcal Phage p2 Baseplate and its Mechanism of Activation</title>
      <authors_list>
         <author>Sciara G</author>
         <author>Bebeacua C</author>
         <author>Bron P</author>
         <author>Tremblay D</author>
         <author>Ortiz-Lombardia M</author>
         <author>Lichiere J</author>
         <author>van Heel M</author>
         <author>Campanacci V</author>
         <author>Moineau S</author>
         <author>Cambillau C</author>
      </authors_list>
      <keywords>p2, baseplate, phage, EM</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Sciara G</author>
               <author order="2">Bebeacua C</author>
               <author order="3">Bron P</author>
               <author order="4">Tremblay D</author>
               <author order="5">Ortiz-Lombardia M</author>
               <author order="6">Lichiere J</author>
               <author order="7">van Heel M</author>
               <author order="8">Campanacci V</author>
               <author order="9">Moineau S</author>
               <author order="10">Cambillau C</author>
               <title>Structure of lactococcal phage p2 baseplate and its mechanism of activation.</title>
               <journal>PROC.NAT.ACAD.SCI.USA</journal>
               <volume>107</volume>
               <first_page>6852</first_page>
               <last_page>6857</last_page>
               <year>2010</year>
               <external_references type="PUBMED">20351260</external_references>
               <external_references type="DOI">doi:10.1073/pnas.1000232107</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
   </crossreferences>
   <sample>
      <name>P2 baseplate wild-type</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>P2 baseplate wild-type</name>
            <oligomeric_state>Homohexamer</oligomeric_state>
            <number_unique_components>1</number_unique_components>
            <molecular_weight>
               <experimental units="MDa">1</experimental>
               <theoretical units="MDa">1</theoretical>
            </molecular_weight>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name synonym="P2 baseplate">P2 baseplate</name>
            <natural_source database="NCBI">
               <organism ncbi="254252">Lactococcus phage p2</organism>
            </natural_source>
            <number_of_copies>6</number_of_copies>
            <oligomeric_state>Hexamer</oligomeric_state>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               </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">
               <staining>
                  <type>NEGATIVE</type>
                  <details>Sample was incubated on glow-discharged grid for approximately one minute. 2% uranyl acetate was applied onto the sample and left for about 30 seconds.</details>
               </staining>
               <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/PHILIPS CM200FEG/UT</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">2.2</nominal_cs>
               <nominal_defocus_min units="&#181;m">0.5</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">1.5</nominal_defocus_max>
               <nominal_magnification>38000.0</nominal_magnification>
               <specimen_holder_model>OTHER</specimen_holder_model>
               <alignment_procedure>
                  <legacy>
                     <astigmatism>corrected at 200,000 times magnification</astigmatism>
                  </legacy>
               </alignment_procedure>
               <image_recording_list>
                  <image_recording>
                     <digitization_details>
                        <sampling_interval units="&#181;m">2.32</sampling_interval>
                     </digitization_details>
                     <number_real_images>1000</number_real_images>
                     <average_electron_dose_per_image units="e/&#8491;^2">10</average_electron_dose_per_image>
                  </image_recording>
               </image_recording_list>
               <specimen_holder>Room Temperature</specimen_holder>
               <tilt_angle_min>0</tilt_angle_min>
               <tilt_angle_max>0</tilt_angle_max>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <ctf_correction>
               <details>CCD Images</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>C6</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">22.0</resolution>
               <resolution_method>OTHER</resolution_method>
               <software_list>
                  <software>
                     <name>IMAGIC-5</name>
                  </software>
               </software_list>
               <details>Initial map calculated with class averages. Final map calculated after projection matching refinement.</details>
               <number_images_used>9486</number_images_used>
            </final_reconstruction>
            <final_angle_assignment>
               <details>IMAGIC</details>
            </final_angle_assignment>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
   <map format="CCP4" size_kbytes="8193">
      <file>emd_1699.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>128</col>
         <row>128</row>
         <sec>128</sec>
      </dimensions>
      <origin>
         <col>-63</col>
         <row>-64</row>
         <sec>-64</sec>
      </origin>
      <spacing>
         <x>128</x>
         <y>128</y>
         <z>128</z>
      </spacing>
      <cell>
         <a units="&#8491;">593.92</a>
         <b units="&#8491;">593.92</b>
         <c units="&#8491;">593.92</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>-7.12447</minimum>
         <maximum>15.0054</maximum>
         <average>0.0791262</average>
         <std>0.812704</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">4.64</x>
         <y units="&#8491;">4.64</y>
         <z units="&#8491;">4.64</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>1.5</level>
            <source>AUTHOR</source>
         </contour>
      </contour_list>
      <annotation_details>This is the ccp4 file of the EM 3D reconstruction of the baseplate of the wild-type p2 bacteriophage.

The map is associated to the following PDB entries:
PDB: 2WZP: BP closed form 
PDB: 2X53: BP Activated form C2 
PDB:  2X54 + 2X5A: BP Activated form P2</annotation_details>
      <details>::::EMDATABANK.org::::EMD-1699::::</details>
   </map>
</emd>