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    <admin>
        <current_status>
            <date>2025-10-01</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2024-10-08</deposition>
            <header_release>2024-12-11</header_release>
            <map_release>2024-12-11</map_release>
            <update>2025-10-01</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Swiss National Science Foundation</funding_body>
                <code>213773</code>
                <country>Switzerland</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM map conventional T20S proteasome</title>
        <authors_list>
            <author ORCID="0000-0002-7721-5048">Straub MS</author>
            <author ORCID="0000-0002-5742-9217">Harder OF</author>
            <author ORCID="0000-0001-8635-7075">Mowry NJ</author>
            <author ORCID="0000-0001-7319-6268">Barrass SV</author>
            <author ORCID="0000-0002-5837-9119">Hruby J</author>
            <author ORCID="0000-0001-8611-2684">Drabbels M</author>
            <author ORCID="0000-0002-8869-5999">Lorenz UJ</author>
        </authors_list>
        <keywords>Protein degradation, UNKNOWN FUNCTION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-7721-5048" order="1">Straub MS</author>
                    <author order="2">Harder OF</author>
                    <author order="3">Mowry NJ</author>
                    <author ORCID="0000-0001-7319-6268" order="4">Barrass SV</author>
                    <author ORCID="0000-0002-5837-9119" order="5">Hruby J</author>
                    <author ORCID="0000-0001-8611-2684" order="6">Drabbels M</author>
                    <author ORCID="0000-0002-8869-5999" order="7">Lorenz UJ</author>
                    <title>Laser flash melting cryo-EM samples to overcome preferred orientation.</title>
                    <journal_abbreviation>Nat.Methods</journal_abbreviation>
                    <country>US</country>
                    <volume>22</volume>
                    <first_page>1880</first_page>
                    <last_page>1886</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40877464</external_references>
                    <external_references type="DOI">doi:10.1038/s41592-025-02796-y</external_references>
                    <external_references type="ISSN">1548-7105</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-7721-5048" order="8">Straub MS</author>
                    <author ORCID="0000-0002-5742-9217" order="9">Harder OF</author>
                    <author ORCID="0000-0001-8635-7075" order="10">Mowry NJ</author>
                    <author ORCID="0000-0001-7319-6268" order="11">Barrass SV</author>
                    <author ORCID="0000-0002-5837-9119" order="12">Hruby J</author>
                    <author ORCID="0000-0001-8611-2684" order="13">Drabbels M</author>
                    <author ORCID="0000-0002-8869-5999" order="14">Lorenz UJ</author>
                    <title>Laser Flash Melting Cryo-EM Samples to Overcome Preferred Orientation.</title>
                    <journal_abbreviation>Biorxiv</journal_abbreviation>
                    <country>US</country>
                    <year>2024</year>
                    <external_references type="PUBMED">39605560</external_references>
                    <external_references type="DOI">doi:10.1101/2024.11.21.624652</external_references>
                    <external_references type="ISSN">2692-8205</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-51745</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-51746</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
        </emdb_list>
        <other_db_list>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-51744</accession_id>
                <content_type>associated EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-51745</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-51746</accession_id>
                <content_type>other EM volume</content_type>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>T20S Proteasome</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>T20S Proteasome</name>
                <parent>0</parent>
                <details>conventional sample</details>
                <natural_source database="NCBI">
                    <organism ncbi="2303">Thermoplasma acidophilum</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.75</theoretical>
                </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">3.7</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <formula>HEPES</formula>
                            <name>HEPES</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>UltrAuFoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <mesh>300</mesh>
                        <support_film film_type_id="1">
                            <film_material>GOLD</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">60</time>
                            <atmosphere>AIR</atmosphere>
                            <pressure units="kPa">0.025</pressure>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">293</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>TFS KRIOS</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>
                    <c2_aperture_diameter units="µm">50.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.6</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.0</nominal_defocus_max>
                    <nominal_magnification>130000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <specialist_optics>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 BIOQUANTUM (6k x 4k)</film_or_detector_model>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>3479</number_real_images>
                            <average_exposure_time units="s">1.3</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">67.0</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>
                <ctf_correction>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                        </software>
                    </software_list>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="NONE"/>
                <final_reconstruction>
                    <applied_symmetry>
                        <point_group>D7</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">2.6</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>50000</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="536871">
        <file>emd_51744.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>512</col>
            <row>512</row>
            <sec>512</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>512</x>
            <y>512</y>
            <z>512</z>
        </spacing>
        <cell>
            <a units="Å">333.312</a>
            <b units="Å">333.312</b>
            <c units="Å">333.312</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>-0.7459829</minimum>
            <maximum>1.1337612</maximum>
            <average>-0.00025815843</average>
            <std>0.042855542</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.651</x>
            <y units="Å">0.651</y>
            <z units="Å">0.651</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.214</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-51744::::</label>
        <annotation_details>map of the conventional T20S sample</annotation_details>
    </map>
    <interpretation>
        <segmentation_list>
            <segmentation>
                <file>emd_51744_msk_1.map</file>
            </segmentation>
        </segmentation_list>
        <half_map_list>
            <half_map format="CCP4" size_kbytes="536871">
                <file>emd_51744_half_map_2.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>512</col>
                    <row>512</row>
                    <sec>512</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
                </origin>
                <spacing>
                    <x>512</x>
                    <y>512</y>
                    <z>512</z>
                </spacing>
                <cell>
                    <a units="Å">333.312</a>
                    <b units="Å">333.312</b>
                    <c units="Å">333.312</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>-0.4532769</minimum>
                    <maximum>0.43309692</maximum>
                    <average>0.00014500327</average>
                    <std>0.053910095</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">0.651</x>
                    <y units="Å">0.651</y>
                    <z units="Å">0.651</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-51744::::</label>
                <annotation_details>half map B to the conventional T20S map</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="536871">
                <file>emd_51744_half_map_1.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>512</col>
                    <row>512</row>
                    <sec>512</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
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                <spacing>
                    <x>512</x>
                    <y>512</y>
                    <z>512</z>
                </spacing>
                <cell>
                    <a units="Å">333.312</a>
                    <b units="Å">333.312</b>
                    <c units="Å">333.312</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>-0.450239</minimum>
                    <maximum>0.46027598</maximum>
                    <average>0.00014443618</average>
                    <std>0.054033875</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">0.651</x>
                    <y units="Å">0.651</y>
                    <z units="Å">0.651</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-51744::::</label>
                <annotation_details>half map A to the conventional T20S map</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
