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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2025-12-19</deposition>
            <header_release>2026-07-29</header_release>
            <map_release>2026-07-29</map_release>
            <update>2026-09-16</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>MCB-1934291</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>DBI-2018942</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, United States)</funding_body>
                <code>MCB 2048095</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Composite map of the bGDH di-hexamer in liganded form</title>
        <authors_list>
            <author>Shan Z</author>
            <author>Lyumkis D</author>
        </authors_list>
        <keywords>Glutamate dehydrogenase Amino acid metabolism filament allosteric regulation, UNKNOWN FUNCTION</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0003-4983-3575" order="1">Shan Z</author>
                    <author order="2">Darwish NI</author>
                    <author ORCID="0000-0002-3430-5641" order="3">Rivero-Gamez A</author>
                    <author order="4">Strutzenberg TS</author>
                    <author ORCID="0000-0002-8124-7472" order="5">Lyumkis D</author>
                    <author ORCID="0000-0003-2710-8284" order="6">Horton NC</author>
                    <title>Structural Mechanism of Filamentation Induced Dampening of GTP Inhibition of Glutamate Dehydrogenase.</title>
                    <journal_abbreviation>Biorxiv</journal_abbreviation>
                    <country>US</country>
                    <year>2026</year>
                    <external_references type="PUBMED">42465363</external_references>
                    <external_references type="DOI">doi:10.64898/2026.07.06.736867</external_references>
                    <external_references type="ISSN">2692-8205</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-74578</emdb_id>
                <relationship>
                    <other>consensus EM volume</other>
                </relationship>
                <details>Consensus map of the bGDH di-hexamer in liganded form</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-74579</emdb_id>
                <relationship>
                    <other>focused EM volume</other>
                </relationship>
                <details>Constituent map A of the bGDH di-hexamer in liganded form</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-74580</emdb_id>
                <relationship>
                    <other>focused EM volume</other>
                </relationship>
                <details>Constituent map B of the bGDH di-hexamer in liganded form</details>
            </emdb_reference>
        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>9zqt</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
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                <accession_id>EMD-74578</accession_id>
                <content_type>consensus EM volume</content_type>
                <details>Consensus map of the bGDH di-hexamer in liganded form</details>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-74579</accession_id>
                <content_type>focused EM volume</content_type>
                <details>Constituent map A of the bGDH di-hexamer in liganded form</details>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-74580</accession_id>
                <content_type>focused EM volume</content_type>
                <details>Constituent map B of the bGDH di-hexamer in liganded form</details>
            </db_reference>
            <db_reference>
                <db_name>EMDB</db_name>
                <accession_id>EMD-74581</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Composite map of the bGDH di-hexamer in liganded form</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Bovine glutamate dehydrogenase</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Bovine glutamate dehydrogenase</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus (Bovine)</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.78</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Glutamate dehydrogenase 1, mitochondrial</name>
                <natural_source database="NCBI">
                    <organism ncbi="9913">Bos taurus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.061593832</theoretical>
                </molecular_weight>
                <number_of_copies>12</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MYRYLGEALLLSRAGPAALGSASADSAALLGWARGQPAAAPQPGLVPPARRHYSEAAADREDDPNFFKMVEGFFDRGASI
VEDKLVEDLKTRETEEQKRNRVRSILRIIKPCNHVLSLSFPIRRDDGSWEVIEGYRAQHSQHRTPCKGGIRYSTDVSVDE
VKALASLMTYKCAVVDVPFGGAKAGVKINPKNYTDNELEKITRRFTMELAKKGFIGPGVDVPAPDMSTGEREMSWIADTY
ASTIGHYDINAHACVTGKPISQGGIHGRISATGRGVFHGIENFINEASYMSILGMTPGFGDKTFVVQGFGNVGLHSMRYL
HRFGAKCITVGESDGSIWNPDGIDPKELEDFKLQHGTILGFPKAKIYEGSILEVDCDILIPAASEKQLTKSNAPRVKAKI
IAEGANGPTTPEADKIFLERNIMVIPDLYLNAGGVTVSYFEWLNNLNHVSYGRLTFKYERDSNYHLLMSVQESLERKFGK
HGGTIPIVPTAEFQDRISGASEKDIVHSGLAYTMERSARQIMRTAMKYNLGLDLRTAAYVNAIEKVFRVYNEAGVTFT</string>
                    <external_references type="UNIPROTKB">P00366</external_references>
                </sequence>
                <ec_number>1.4.1.3</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>GUANOSINE-5'-TRIPHOSPHATE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0005231799999999999</theoretical>
                </molecular_weight>
                <number_of_copies>12</number_of_copies>
                <formula>GTP</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000665441</theoretical>
                </molecular_weight>
                <number_of_copies>24</number_of_copies>
                <formula>NAI</formula>
            </ligand>
            <ligand macromolecule_id="4">
                <name>GAMMA-L-GLUTAMIC ACID</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000147129</theoretical>
                </molecular_weight>
                <number_of_copies>6</number_of_copies>
                <formula>GGL</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>filament</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">0.5</concentration>
                    <buffer>
                        <ph>7.5</ph>
                    </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>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">90</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>HOMEMADE PLUNGER</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>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.6</nominal_defocus_max>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_exposure_time units="s">3.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">44.8</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>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="OTHER">
                    <details>An atomic bGDH model derived from AlphaFold3 prediction</details>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.5</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>UCSF Chimera</name>
                        </software>
                    </software_list>
                    <number_images_used>97554</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>
    <map format="CCP4" size_kbytes="131073">
        <file>emd_74581.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>320</col>
            <row>320</row>
            <sec>320</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>320</x>
            <y>320</y>
            <z>320</z>
        </spacing>
        <cell>
            <a units="Å">420.86398</a>
            <b units="Å">420.86398</b>
            <c units="Å">420.86398</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>-0.09447529</minimum>
            <maximum>0.67673844</maximum>
            <average>0.004099136</average>
            <std>0.014880528</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.3152</x>
            <y units="Å">1.3152</y>
            <z units="Å">1.3152</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.08</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-74581::::</label>
        <annotation_details>The composite map of dimer-of-hexameric bovine glutamate dehydrogenase in liganded form</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <refinement_protocol>FLEXIBLE FIT</refinement_protocol>
                <refinement_space>REAL</refinement_space>
            </modelling>
        </modelling_list>
    </interpretation>
</emd>
