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    <admin>
        <current_status>
            <date>2024-07-10</date>
            <code>REL</code>
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            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-04-10</deposition>
            <header_release>2021-05-19</header_release>
            <map_release>2021-05-19</map_release>
            <update>2024-07-10</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>European Union (EU)</funding_body>
                <code>766970</code>
                <country>European Union</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Netherlands Organisation for Scientific Research (NWO)</funding_body>
                <code>184.034.014</code>
                <country>Netherlands</country>
            </grant_reference>
        </grant_support>
        <title>2.12 A cryo-EM structure of Mycobacterium tuberculosis Ferritin</title>
        <authors_list>
            <author>Gijsbers A</author>
            <author>Zhang Y</author>
        </authors_list>
        <keywords>Iron storage; Ferroxidase; Bacterial Ferritin; Octahedral symmetry., METAL TRANSPORT</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-6622-3686" order="1">Gijsbers A</author>
                    <author ORCID="0000-0003-4482-1866" order="2">Zhang Y</author>
                    <author order="3">Gao Y</author>
                    <author ORCID="0000-0002-2964-5684" order="4">Peters PJ</author>
                    <author ORCID="0000-0001-6056-5888" order="5">Ravelli RBG</author>
                    <title>Mycobacterium tuberculosis ferritin: a suitable workhorse protein for cryo-EM development.</title>
                    <journal_abbreviation>Acta Crystallogr D Struct Biol</journal_abbreviation>
                    <volume>77</volume>
                    <first_page>1077</first_page>
                    <last_page>1083</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34342280</external_references>
                    <external_references type="DOI">doi:10.1107/S2059798321007233</external_references>
                    <external_references type="ISSN">2059-7983</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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            <pdb_reference>
                <pdb_id>7o6e</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Mycobacterium tuberculosis ferritin</name>
        <supramolecule_list>
            <organelle_or_cellular_component_supramolecule supramolecule_id="1">
                <name>Mycobacterium tuberculosis ferritin</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Mycobacterium tuberculosis ferritin</details>
                <natural_source database="NCBI">
                    <organism ncbi="83332">Mycobacterium tuberculosis H37Rv</organism>
                    <strain>H37Rv</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.490</theoretical>
                </molecular_weight>
            </organelle_or_cellular_component_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Ferritin BfrB</name>
                <natural_source database="NCBI">
                    <organism ncbi="83332">Mycobacterium tuberculosis H37Rv</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.020463936000000002</theoretical>
                </molecular_weight>
                <number_of_copies>24</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MTEYEGPKTKFHALMQEQIHNEFTAAQQYVAIAVYFDSEDLPQLAKHFYSQAVEERNHAMMLVQHLLDRDLRVEIPGVDT
VRNQFDRPREALALALDQERTVTDQVGRLTAVARDEGDFLGEQFMQWFLQEQIEEVALMATLVRVADRAGANLFELENFV
AREVDVAPAASGAPHAAGGRL</string>
                    <external_references type="UNIPROTKB">P9WNE5</external_references>
                </sequence>
                <ec_number>1.16.3.1</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>1392</number_of_copies>
                <formula>HOH</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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        <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">11</concentration>
                    <buffer>
                        <ph>8.0</ph>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <formula>(HOCH2)3CNH2</formula>
                            <name>Tris</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <formula>NaCl</formula>
                            <name>Sodium Chloride</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>UltrAuFoil</model>
                        <material>GOLD</material>
                        <mesh>300</mesh>
                        <support_film film_type_id="1">
                            <film_material>GOLD</film_material>
                            <film_topology>HOLEY ARRAY</film_topology>
                            <film_thickness>2000.0</film_thickness>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">40</time>
                            <atmosphere>AIR</atmosphere>
                            <pressure units="kPa">0.01</pressure>
                        </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>
                    </vitrification>
                    <details>This sample was monodisperse.</details>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN 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">0.4</nominal_defocus_min>
                    <calibrated_defocus_min units="µm">0.2</calibrated_defocus_min>
                    <nominal_defocus_max units="µm">1.4000000000000001</nominal_defocus_max>
                    <calibrated_defocus_max units="µm">2.0</calibrated_defocus_max>
                    <nominal_magnification>130000.0</nominal_magnification>
                    <calibrated_magnification>76757.0</calibrated_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
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                        <temperature_min units="K">93.0</temperature_min>
                        <temperature_max units="K">105.0</temperature_max>
                    </temperature>
                    <alignment_procedure>
                        <other/>
                    </alignment_procedure>
                    <specialist_optics>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <details>Basic direct alignments were done as well as astigmatism and coma alignment using AutoCTF</details>
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                            <film_or_detector_model>GATAN K3 BIOQUANTUM (6k x 4k)</film_or_detector_model>
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                                    <width units="pixel">5760</width>
                                    <height units="pixel">4092</height>
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                            <average_electron_dose_per_image units="e/Å^2">40.0</average_electron_dose_per_image>
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                    </image_recording_list>
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            </microscopy_list>
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                        <point_group>O</point_group>
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                    <resolution units="Å" res_type="BY AUTHOR">2.1</resolution>
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                <refinement_protocol>OTHER</refinement_protocol>
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