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    <admin>
        <current_status>
            <date>2025-03-19</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
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                            <category>citation</category>
                            <category>em_admin</category>
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                            <item>_citation.title</item>
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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2024-06-14</deposition>
            <header_release>2025-02-12</header_release>
            <map_release>2025-02-12</map_release>
            <update>2025-03-19</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>GM122510</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>CHE 2203937</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of the C1q A, B-crt, C peptide assembly narrow region</title>
        <authors_list>
            <author>Kreutzberger MA</author>
            <author>Yu LT</author>
            <author>Egelman EH</author>
            <author>Hartgerink JD</author>
        </authors_list>
        <keywords>C1q, complement, collagen, triple helix, IMMUNE SYSTEM</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Kreutzberger MAB</author>
                    <author order="2">Yu LT</author>
                    <author order="3">Bui TH</author>
                    <author order="4">Hancu MC</author>
                    <author order="5">Purdy MD</author>
                    <author order="6">Osinski T</author>
                    <author order="7">Kasson PM</author>
                    <author order="8">Egelman EH</author>
                    <author order="9">Hartgerink JD</author>
                    <title>A Collagen Triple Helix without the Superhelical Twist.</title>
                    <journal_abbreviation>Acs Cent.Sci.</journal_abbreviation>
                    <country>US</country>
                    <volume>11</volume>
                    <first_page>331</first_page>
                    <last_page>345</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40028357</external_references>
                    <external_references type="DOI">doi:10.1021/acscentsci.5c00018</external_references>
                    <external_references type="ISSN">2374-7951</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>9c9l</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Narrow region structure of the octadecameric C1q A, B-crt, C peptide assembly</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Narrow region structure of the octadecameric C1q A, B-crt, C peptide assembly</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI" synthetically_produced="true">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="kDa/nm">70</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Peptide from Complement C1q subcomponent subunit B</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0012504</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>P(HYP)AI(HYP)GI(HYP)GI(HYP)GT</string>
                    <external_references type="UNIPROTKB">P02746</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Peptide from Complement C1q subcomponent subunit A</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.001258363</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>APDGKKGEAGR(HYP)G</string>
                    <external_references type="UNIPROTKB">P02745</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Peptide from Complement C1q subcomponent subunit C</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0013135019999999998</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>GI(HYP)GM(HYP)GL(HYP)GA(HYP)GK</string>
                    <external_references type="UNIPROTKB">P02747</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>
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                <single_particle_preparation preparation_id="1">
                    <buffer>
                        <ph>7.4</ph>
                        <details>20 mM PBS</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">295</chamber_temperature>
                    </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>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">3.0</nominal_defocus_max>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">60.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
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                <image_recording_id>1</image_recording_id>
                <startup_model type_of_model="NONE"/>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.7</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>374558</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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            <space_group>1</space_group>
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        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
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            <row>289</row>
            <sec>289</sec>
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            <y>289</y>
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            <b units="Å">289.0</b>
            <c units="Å">289.0</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
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        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
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            <maximum>13.552288000000001</maximum>
            <average>0.003928212</average>
            <std>0.17507961</std>
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        <pixel_spacing>
            <x units="Å">1.0</x>
            <y units="Å">1.0</y>
            <z units="Å">1.0</z>
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        <contour_list>
            <contour primary="true">
                <level>5.4</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-45363::::</label>
        <annotation_details>This is the primary map that should be view for interpretation of our atomic modeling results. Achieved after filtering, masking out the uninterpretable density and then sharpening with EM ready.</annotation_details>
    </map>
    <interpretation>
        <segmentation_list>
            <segmentation>
                <file>emd_45363_msk_1.map</file>
            </segmentation>
        </segmentation_list>
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                    <space_group>1</space_group>
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                    <row>216</row>
                    <sec>216</sec>
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                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
                </origin>
                <spacing>
                    <x>216</x>
                    <y>216</y>
                    <z>216</z>
                </spacing>
                <cell>
                    <a units="Å">289.44</a>
                    <b units="Å">289.44</b>
                    <c units="Å">289.44</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>-14.355013</minimum>
                    <maximum>18.840197</maximum>
                    <average>-0.00087868056</average>
                    <std>0.19057065</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.34</x>
                    <y units="Å">1.34</y>
                    <z units="Å">1.34</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45363::::</label>
                <annotation_details>This is the initial sharpened map from cryoSPARC</annotation_details>
            </additional_map>
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                <file>emd_45363_additional_1.map.gz</file>
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                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
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                    <row>216</row>
                    <sec>216</sec>
                </dimensions>
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                <spacing>
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                    <y>216</y>
                    <z>216</z>
                </spacing>
                <cell>
                    <a units="Å">289.44</a>
                    <b units="Å">289.44</b>
                    <c units="Å">289.44</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>-1.2370802</minimum>
                    <maximum>2.5990033</maximum>
                    <average>0.0005442308</average>
                    <std>0.02241442</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.34</x>
                    <y units="Å">1.34</y>
                    <z units="Å">1.34</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45363::::</label>
                <annotation_details>This is the map prior to sharpening by EMReady. Achieved by low pass filtering the initial map and then cutting out the density with a mask generated from preliminary model.</annotation_details>
            </additional_map>
        </additional_map_list>
        <half_map_list>
            <half_map format="CCP4" size_kbytes="40311">
                <file>emd_45363_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>216</col>
                    <row>216</row>
                    <sec>216</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
                </origin>
                <spacing>
                    <x>216</x>
                    <y>216</y>
                    <z>216</z>
                </spacing>
                <cell>
                    <a units="Å">289.44</a>
                    <b units="Å">289.44</b>
                    <c units="Å">289.44</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>-1.2752342</minimum>
                    <maximum>2.3819807</maximum>
                    <average>-0.00009372769</average>
                    <std>0.03226806</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.34</x>
                    <y units="Å">1.34</y>
                    <z units="Å">1.34</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45363::::</label>
                <annotation_details>This is half map B from cryoSPARC</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="40311">
                <file>emd_45363_half_map_1.map.gz</file>
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                    <space_group>1</space_group>
                </symmetry>
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                    <col>216</col>
                    <row>216</row>
                    <sec>216</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
                </origin>
                <spacing>
                    <x>216</x>
                    <y>216</y>
                    <z>216</z>
                </spacing>
                <cell>
                    <a units="Å">289.44</a>
                    <b units="Å">289.44</b>
                    <c units="Å">289.44</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>-1.3051661</minimum>
                    <maximum>2.349223</maximum>
                    <average>-0.00007801546</average>
                    <std>0.032254837</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">1.34</x>
                    <y units="Å">1.34</y>
                    <z units="Å">1.34</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-45363::::</label>
                <annotation_details>This is the half map A from cryoSPARC</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
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