<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" emdb_id="EMD-2513" 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>2013-11-21</deposition>
         <header_release>2013-12-18</header_release>
         <map_release>2014-02-26</map_release>
         <update>2016-02-17</update>
      </key_dates>
      <title>Electron cryo-microscopy of F420-reducing [NiFe] hydrogenase Frh</title>
      <authors_list>
         <author>Allegretti M</author>
         <author>Mills DJ</author>
         <author>McMullan G</author>
         <author>Kuehlbrandt W</author>
         <author>Vonck J</author>
      </authors_list>
      <keywords>hydrogenase, flavoprotein, [NiFe] hydrogenase, electron transfer, ferredoxin</keywords>
   </admin>
   <crossreferences>
      <citation_list>
         <primary_citation>
            <journal_citation published="true">
               <author order="1">Allegretti M</author>
               <author order="2">Mills DJ</author>
               <author order="3">McMullan G</author>
               <author order="4">Kuehlbrandt W</author>
               <author order="5">Vonck J</author>
               <title>Atomic model of the F420-reducing [NiFe] hydrogenase by electron cryo-microscopy using a direct electron detector.</title>
               <journal>ELIFE</journal>
               <volume>3</volume>
               <first_page>e01963</first_page>
               <last_page>e01963</last_page>
               <year>2014</year>
               <external_references type="PUBMED">24569482</external_references>
               <external_references type="DOI">doi:10.7554/eLife.01963</external_references>
            </journal_citation>
         </primary_citation>
      </citation_list>
      <pdb_list>
         <pdb_reference>
            <pdb_id>4ci0</pdb_id>
            <relationship>
               <in_frame>FULLOVERLAP</in_frame>
            </relationship>
         </pdb_reference>
      </pdb_list>
   </crossreferences>
   <sample>
      <name>F420 reducing hydrogenase</name>
      <supramolecule_list>
         <sample_supramolecule supramolecule_id="1000">
            <name>F420 reducing hydrogenase</name>
            <oligomeric_state>a dodecamer of the heterotrimer FrhA, FrhB, FrhG</oligomeric_state>
            <number_unique_components>3</number_unique_components>
            <molecular_weight>
               <experimental units="MDa">1.2</experimental>
               <theoretical units="MDa">1.2</theoretical>
            </molecular_weight>
         </sample_supramolecule>
      </supramolecule_list>
      <macromolecule_list>
         <protein_or_peptide macromolecule_id="1">
            <name synonym="FrhA">F420-reducing hydrogenase, subunit alpha</name>
            <natural_source database="NCBI">
               <organism ncbi="145263">Methanothermobacter marburgensis</organism>
               <strain>DSM 2133</strain>
               <cellular_location>cytoplasm</cellular_location>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.44</experimental>
               <theoretical units="MDa">0.44</theoretical>
            </molecular_weight>
            <number_of_copies>12</number_of_copies>
            <oligomeric_state>dodecamer</oligomeric_state>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">D9PYF9</external_references>
               <external_references type="INTERPRO">IPR017682</external_references>
               <external_references type="INTERPRO">IPR017679</external_references>
               <external_references type="INTERPRO">IPR017681</external_references>
            </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="2">
            <name synonym="FrhB">F420-reducing hydrogenase, subunit beta</name>
            <natural_source database="NCBI">
               <organism ncbi="145263">Methanothermobacter marburgensis</organism>
               <strain>DSM 2133</strain>
               <cellular_location>cytoplasm</cellular_location>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.30</experimental>
               <theoretical units="MDa">0.30</theoretical>
            </molecular_weight>
            <number_of_copies>12</number_of_copies>
            <oligomeric_state>dodecamer</oligomeric_state>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">D9PYF6</external_references>
               <external_references type="INTERPRO">IPR017682</external_references>
               <external_references type="INTERPRO">IPR017679</external_references>
               <external_references type="INTERPRO">IPR017681</external_references>
            </sequence>
         </protein_or_peptide>
         <protein_or_peptide macromolecule_id="3">
            <name synonym="FrhG">F420-reducing hydrogenase, subunit gamma</name>
            <natural_source database="NCBI">
               <organism ncbi="145263">Methanothermobacter marburgensis</organism>
               <strain>DSM 2133</strain>
               <cellular_location>cytoplasm</cellular_location>
            </natural_source>
            <molecular_weight>
               <experimental units="MDa">0.30</experimental>
               <theoretical units="MDa">0.30</theoretical>
            </molecular_weight>
            <number_of_copies>12</number_of_copies>
            <oligomeric_state>dodecamer</oligomeric_state>
            <recombinant_exp_flag>false</recombinant_exp_flag>
            <recombinant_expression database="NCBI">
               </recombinant_expression>
            <sequence>
               <external_references type="UNIPROTKB">D9PYF6</external_references>
               <external_references type="INTERPRO">IPR017682</external_references>
               <external_references type="INTERPRO">IPR017679</external_references>
               <external_references type="INTERPRO">IPR017681</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">0.7</concentration>
               <buffer>
                  <ph>7.6</ph>
                  <details>50mM Tris-HCl, 0.025mM FAD</details>
               </buffer>
               <grid>
                  <details>freshly glow discharged Quantifoil holey grid (1 micrometer holes)</details>
               </grid>
               <vitrification>
                  <cryogen_name>ETHANE</cryogen_name>
                  <chamber_humidity units="percentage">70</chamber_humidity>
                  <chamber_temperature units="K">103</chamber_temperature>
                  <instrument>FEI VITROBOT MARK I</instrument>
                  <method>blotting 2.5 seconds before plunging</method>
               </vitrification>
            </single_particle_preparation>
         </specimen_preparation_list>
         <microscopy_list>
            <single_particle_microscopy microscopy_id="1">
               <microscope>FEI POLARA 300</microscope>
               <illumination_mode>FLOOD BEAM</illumination_mode>
               <imaging_mode>BRIGHT FIELD</imaging_mode>
               <electron_source>FIELD EMISSION GUN</electron_source>
               <acceleration_voltage units="kV">300</acceleration_voltage>
               <nominal_cs units="mm">2.2</nominal_cs>
               <nominal_defocus_min units="&#181;m">0.8</nominal_defocus_min>
               <nominal_defocus_max units="&#181;m">2.5</nominal_defocus_max>
               <nominal_magnification>78000.0</nominal_magnification>
               <calibrated_magnification>106000.0</calibrated_magnification>
               <specimen_holder_model>OTHER</specimen_holder_model>
               <temperature>
                  <temperature_min units="K">77</temperature_min>
                  <temperature_max units="K">80</temperature_max>
                  <temperature_average units="K">79</temperature_average>
               </temperature>
               <alignment_procedure>
                  <legacy>
                     <astigmatism>Objective lens astigmatism was corrected at 120,000 times magnification</astigmatism>
                  </legacy>
               </alignment_procedure>
               <details>data was collected in movie mode</details>
               <date>2013-05-27</date>
               <image_recording_list>
                  <image_recording>
                     <film_or_detector_model category="CCD">FEI FALCON II (4k x 4k)</film_or_detector_model>
                     <number_real_images>235</number_real_images>
                     <average_electron_dose_per_image units="e/&#8491;^2">22</average_electron_dose_per_image>
                     <details>Every image is the average of six frames recorded by the direct electron detector aligned to each other</details>
                     <bits_per_pixel>16.</bits_per_pixel>
                  </image_recording>
               </image_recording_list>
            </single_particle_microscopy>
         </microscopy_list>
         <singleparticle_processing image_processing_id="1">
            <ctf_correction>
               <details>each image</details>
            </ctf_correction>
            <final_reconstruction>
               <applied_symmetry>
                  <point_group>T</point_group>
               </applied_symmetry>
               <algorithm>OTHER</algorithm>
               <resolution res_type="BY AUTHOR" units="&#8491;">3.36</resolution>
               <resolution_method>OTHER</resolution_method>
               <software_list>
                  <software>
                     <name>RELION</name>
                  </software>
               </software_list>
               <number_images_used>26000</number_images_used>
            </final_reconstruction>
         </singleparticle_processing>
      </structure_determination>
   </structure_determination_list>
   <map format="CCP4" size_kbytes="43905">
      <file>emd_2513.map.gz</file>
      <symmetry>
         <space_group>1</space_group>
      </symmetry>
      <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
      <dimensions>
         <col>224</col>
         <row>224</row>
         <sec>224</sec>
      </dimensions>
      <origin>
         <col>0</col>
         <row>0</row>
         <sec>0</sec>
      </origin>
      <spacing>
         <x>224</x>
         <y>224</y>
         <z>224</z>
      </spacing>
      <cell>
         <a units="&#8491;">295.68002</a>
         <b units="&#8491;">295.68002</b>
         <c units="&#8491;">295.68002</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>-0.19804479</minimum>
         <maximum>0.62828296</maximum>
         <average>0.0022398</average>
         <std>0.02294438</std>
      </statistics>
      <pixel_spacing>
         <x units="&#8491;">1.32</x>
         <y units="&#8491;">1.32</y>
         <z units="&#8491;">1.32</z>
      </pixel_spacing>
      <contour_list>
         <contour primary="true">
            <level>0.09</level>
            <source>AUTHOR</source>
         </contour>
      </contour_list>
      <annotation_details>FrhABG dodecamer</annotation_details>
      <details>::::EMDATABANK.org::::EMD-2513::::</details>
   </map>
   <interpretation>
      <modelling_list>
         <modelling>
            <initial_model>
               <access_code>3zfs</access_code>
               <chain>
                  <chain_id>A</chain_id>
               </chain>
               <chain>
                  <chain_id>B</chain_id>
               </chain>
               <chain>
                  <chain_id>C</chain_id>
               </chain>
            </initial_model>
            <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
            <software_list>
               <software>
                  <name>Coot</name>
               </software>
            </software_list>
            <details>The structure was built using Coot based on an earlier model built into a lower resolution EM map</details>
            <refinement_space>REAL</refinement_space>
         </modelling>
      </modelling_list>
      <figure_list>
         <figure>
            <file>emd_2513.tif</file>
         </figure>
      </figure_list>
   </interpretation>
</emd>