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    <admin>
        <current_status>
            <date>2016-11-30</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2016-08-15</deposition>
            <header_release>2016-10-19</header_release>
            <map_release>2016-10-19</map_release>
            <update>2016-11-30</update>
        </key_dates>
        <title>Structural basis for dynamic regulation of the human 26S proteasome</title>
        <authors_list>
            <author>Chen S</author>
            <author>Wu J</author>
            <author>Lu Y</author>
            <author>Ma YB</author>
            <author>Lee BH</author>
            <author>Yu Z</author>
            <author>Ouyang Q</author>
            <author>Finley D</author>
            <author>Kirschner MW</author>
            <author>Mao Y</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Chen S</author>
                    <author order="2">Wu J</author>
                    <author order="3">Lu Y</author>
                    <author order="4">Ma YB</author>
                    <author order="5">Lee BH</author>
                    <author order="6">Yu Z</author>
                    <author order="7">Ouyang Q</author>
                    <author order="8">Finley DJ</author>
                    <author order="9">Kirschner MW</author>
                    <author order="10">Mao Y</author>
                    <title>Structural basis for dynamic regulation of the human 26S proteasome.</title>
                    <journal_abbreviation>Proc.Natl.Acad.Sci.USA</journal_abbreviation>
                    <country>US</country>
                    <volume>113</volume>
                    <first_page>12991</first_page>
                    <last_page>12996</last_page>
                    <year>2016</year>
                    <external_references type="PUBMED">27791164</external_references>
                    <external_references type="DOI">doi:10.1073/pnas.1614614113</external_references>
                    <external_references type="ISSN">1091-6490</external_references>
                    <external_references type="ASTM">PNASA6</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-8335</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-8332</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-8333</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-8334</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-8336</emdb_id>
                <relationship>
                    <other>other EM volume</other>
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            <emdb_reference>
                <emdb_id>EMD-8337</emdb_id>
                <relationship>
                    <other>other EM volume</other>
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        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>5t0h</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>26S proteasome holoenzyme</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>26S proteasome holoenzyme</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <experimental units="MDa">2.5</experimental>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_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">1.5</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <formula>C4H12ClNO3</formula>
                            <name>Tris-HCl</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <formula>MgCl2</formula>
                            <name>magnesium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">3.0</concentration>
                            <name>ATP</name>
                        </component>
                        <component>
                            <concentration units="mM">0.5</concentration>
                            <name>TCEP</name>
                        </component>
                        <component>
                            <concentration units="%">0.005</concentration>
                            <name>NP-40</name>
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                    <grid>
                        <model>C-Flat R1/1</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY ARRAY</film_topology>
                            <film_thickness units="nm">50.0</film_thickness>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>blotted for 2 seconds, blotting force 3. </details>
                    </vitrification>
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            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TECNAI ARCTICA</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>
                    <c2_aperture_diameter units="&#181;m">50.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="&#181;m">-1.0</nominal_defocus_min>
                    <nominal_defocus_max units="&#181;m">-3.0</nominal_defocus_max>
                    <nominal_magnification>21000.</nominal_magnification>
                    <calibrated_magnification>28736.</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free />
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <detector_mode>SUPER-RESOLUTION</detector_mode>
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                                <dimensions>
                                    <width units="pixel">7420</width>
                                    <height units="pixel">7676</height>
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                                <sampling_interval units="&#181;m">5.0</sampling_interval>
                                <frames_per_image>3-20</frames_per_image>
                            </digitization_details>
                            <number_grids_imaged>12</number_grids_imaged>
                            <number_real_images>10367</number_real_images>
                            <average_exposure_time units="s">9.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/&#8491;^2">30.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <particle_selection>
                    <number_selected>528196</number_selected>
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                <ctf_correction>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>1.3</version>
                        </software>
                    </software_list>
                </ctf_correction>
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                    <algorithm>BACK PROJECTION</algorithm>
                    <resolution res_type="BY AUTHOR" units="&#8491;">6.8</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>1.3</version>
                        </software>
                    </software_list>
                    <number_images_used>18443</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
                    <software_list>
                        <software>
                            <name>EMAN</name>
                            <version>2</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>PROJECTION MATCHING</type>
                    <projection_matching_processing />
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>1.3</version>
                        </software>
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                </final_angle_assignment>
                <final_three_d_classification>
                    <number_classes>4</number_classes>
                </final_three_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <file>emd_8335.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>360</col>
            <row>360</row>
            <sec>360</sec>
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            <a units="&#8491;">309.6</a>
            <b units="&#8491;">309.6</b>
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            <beta units="deg">90.0</beta>
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            <fast>X</fast>
            <medium>Y</medium>
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            <minimum>-0.0024096896</minimum>
            <maximum>0.005274156</maximum>
            <average>-0.000008824916</average>
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            <y units="&#8491;">0.86</y>
            <z units="&#8491;">0.86</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.0015</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-8335::::</label>
        <annotation_details>The half 26S proteasome reconstruction in the SB state focusing on the regulatory particle from 18443 particles of half 26S</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
                <refinement_space>REAL</refinement_space>
                <overall_bvalue>150.</overall_bvalue>
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        </modelling_list>
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