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    <admin>
        <current_status>
            <date>2026-03-04</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <revision_history>
            <revision version="1.0" date="2026-03-04">
                <change_list>
                    <metadata>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </metadata>
                    <fsc>
                        <revision_type>INITIAL_RELEASE</revision_type>
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                        <provider>REPOSITORY</provider>
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                    <half_map part="2">
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                    <image>
                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2026-01-22</deposition>
            <header_release>2026-03-04</header_release>
            <map_release>2026-03-04</map_release>
            <update>2026-03-04</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Knut and Alice Wallenberg Foundation</funding_body>
                <code>2022.0241</code>
                <country>Sweden</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Novo Nordisk Foundation</funding_body>
                <code>NNF18OC0032828</code>
                <country>Denmark</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Swedish Research Council</funding_body>
                <code>2025-03943</code>
                <country>Sweden</country>
            </grant_reference>
        </grant_support>
        <title>Escherichia coli ribosome arrested on a chimeric, 130-residue construct featuring a firefly-luciferase truncation followed by SecM(3W)</title>
        <authors_list>
            <author ORCID="0000-0002-3937-5833">Westerfield JM</author>
            <author ORCID="0000-0002-4490-8569">von Heijne G</author>
        </authors_list>
        <keywords>Firefly luciferase, cotranslational folding, Rossmann fold, multi-domain protein, Ribosome-nascent chain, RIBOSOME</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Mitsikosta S</author>
                    <author ORCID="0000-0002-3937-5833" order="2">Westerfield JM</author>
                    <author order="3">Pardo-Avila F</author>
                    <author ORCID="0000-0002-8414-7397" order="4">Levitt M</author>
                    <author ORCID="0000-0002-4490-8569" order="5">von Heijne G</author>
                    <author ORCID="0000-0002-2885-7634" order="6">Metola A</author>
                    <title>Quasi-continuous cotranslational compaction and folding of a multidomain protein.</title>
                    <journal_abbreviation>Biorxiv</journal_abbreviation>
                    <country>US</country>
                    <year>2026</year>
                    <external_references type="PUBMED">41676707</external_references>
                    <external_references type="DOI">doi:10.64898/2026.02.04.703729</external_references>
                    <external_references type="ISSN">2692-8205</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <other_db_list>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-56453</accession_id>
                <content_type>associated EM volume</content_type>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Escherichia coli ribosome arrested on chimaeric nascent chain composed of truncated firefly luciferase and the SecM(3W) arrest peptide, N=130</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Escherichia coli ribosome arrested on chimaeric nascent chain composed of truncated firefly luciferase and the SecM(3W) arrest peptide, N=130</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="469008">Escherichia coli BL21(DE3)</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>FLuc SecM(3W) N = 130</name>
                <natural_source database="NCBI">
                    <organism ncbi="469008">Escherichia coli BL21(DE3)</organism>
                </natural_source>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MHHHHHHEDAKNIKKGPAPFYPLEDGTAGEQLHKAMKRYALVPGTIAFTDAHIEVDITYAEYFEMSVRLAEAMKRYGLNTNHRIVVCSENSLQFFMPVLGALFIGVAVAPANDIYNSGSFSTPVWIWWWPPIRGSPGSSDKQEGEWPTGLRLSRIGGIH</string>
                </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">
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <name>HEPES-KOH, pH 7.5</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <name>KOAc</name>
                        </component>
                        <component>
                            <concentration units="mM">10.0</concentration>
                            <name>Mg(OAc)2</name>
                        </component>
                        <component>
                            <concentration units="mM">750.0</concentration>
                            <name>Sucrose</name>
                        </component>
                        <component>
                            <concentration units="g/L">1.0</concentration>
                            <name>DDM</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>Quantifoil R3.5/1</model>
                        <material>COPPER</material>
                        <mesh>200</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">30</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                        <details>The grid was ultrathin carbon coated by flotation.</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277.15</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">1.67</nominal_cs>
                    <nominal_defocus_min units="µm">0.6</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.4</nominal_defocus_max>
                    <nominal_magnification>105000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON IV (4k x 4k)</film_or_detector_model>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>8723</number_real_images>
                            <average_exposure_time units="s">1.74</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">40.0</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>
                            <version>4.3.0</version>
                        </software>
                    </software_list>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="NONE"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">2.29</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>4.3.0</version>
                        </software>
                    </software_list>
                    <number_images_used>770654</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>4.3.0</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>4.3.0</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <number_classes>4</number_classes>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>4.3.0</version>
                        </software>
                    </software_list>
                </final_three_d_classification>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <file>emd_56453.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
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            <col>550</col>
            <row>550</row>
            <sec>550</sec>
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        <cell>
            <a units="Å">455.4</a>
            <b units="Å">455.4</b>
            <c units="Å">455.4</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>
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        <statistics>
            <minimum>-0.4000936</minimum>
            <maximum>1.0048639</maximum>
            <average>-0.0009933535</average>
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        </statistics>
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        <contour_list>
            <contour primary="true">
                <level>0.1</level>
                <source>AUTHOR</source>
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        <label>::::EMDATABANK.org::::EMD-56453::::</label>
        <annotation_details>Main map</annotation_details>
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    <interpretation>
        <half_map_list>
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                <file>emd_56453_half_map_1.map.gz</file>
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                    <b units="Å">455.4</b>
                    <c units="Å">455.4</c>
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                    <beta units="deg">90.0</beta>
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                <label>::::EMDATABANK.org::::EMD-56453::::</label>
                <annotation_details>Half map A</annotation_details>
            </half_map>
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                <file>emd_56453_half_map_2.map.gz</file>
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                    <b units="Å">455.4</b>
                    <c units="Å">455.4</c>
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                    <beta units="deg">90.0</beta>
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                    <medium>Y</medium>
                    <slow>Z</slow>
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                    <minimum>-0.6325231</minimum>
                    <maximum>1.1869763</maximum>
                    <average>0.0010641634</average>
                    <std>0.07795403</std>
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                    <y units="Å">0.828</y>
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                        <source>AUTHOR</source>
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                <label>::::EMDATABANK.org::::EMD-56453::::</label>
                <annotation_details>Half map B</annotation_details>
            </half_map>
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