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    <admin>
        <current_status>
            <date>2025-06-25</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2024-11-11</deposition>
            <header_release>2024-12-11</header_release>
            <map_release>2024-12-11</map_release>
            <update>2025-06-25</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>206422/Z/17/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM density map of the mature HIV-1 MA trimer of wild type</title>
        <authors_list>
            <author ORCID="0000-0001-5595-3026">Chen L</author>
            <author ORCID="0000-0003-1803-691X">Zhang P</author>
        </authors_list>
        <keywords>Matrix protein, Trimeric assembly, Virus-like particle, HIV Structural Biology, STRUCTURAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-5595-3026" order="1">Chen L</author>
                    <author ORCID="0000-0002-6762-3179" order="2">Hikichi Y</author>
                    <author ORCID="0000-0003-2274-3748" order="3">Rey JS</author>
                    <author ORCID="0000-0002-9464-1903" order="4">Akil C</author>
                    <author order="5">Zhu Y</author>
                    <author ORCID="0009-0007-8733-5258" order="6">Veler H</author>
                    <author ORCID="0000-0002-0278-0771" order="7">Shen Y</author>
                    <author ORCID="0000-0003-1171-6816" order="8">Perilla JR</author>
                    <author ORCID="0000-0003-3345-022X" order="9">Freed EO</author>
                    <author ORCID="0000-0003-1803-691X" order="10">Zhang P</author>
                    <title>Structural maturation of the matrix lattice is not required for HIV-1 particle infectivity.</title>
                    <journal_abbreviation>Sci Adv</journal_abbreviation>
                    <country>US</country>
                    <volume>11</volume>
                    <first_page>eadv4356</first_page>
                    <last_page>eadv4356</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40344051</external_references>
                    <external_references type="DOI">doi:10.1126/sciadv.adv4356</external_references>
                    <external_references type="ISSN">2375-2548</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <emdb_id>EMD-52051</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
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            <emdb_reference>
                <emdb_id>EMD-52052</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-52059</emdb_id>
                <relationship>
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            <emdb_reference>
                <emdb_id>EMD-52060</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
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        </emdb_list>
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    <sample>
        <name>Human immunodeficiency virus 1</name>
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            <virus_supramolecule supramolecule_id="1">
                <name>Human immunodeficiency virus 1</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <sci_species_name ncbi="11676">Human immunodeficiency virus 1</sci_species_name>
                <sci_species_strain>pNL4-3</sci_species_strain>
                <virus_type>VIRUS-LIKE PARTICLE</virus_type>
                <virus_isolate>STRAIN</virus_isolate>
                <virus_enveloped>true</virus_enveloped>
                <virus_empty>false</virus_empty>
            </virus_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>HIV-1 Matrix Protein</name>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MGARASVLSGGELDKWEKIRLRPGGKKQYKLKHIVWASRELERFAVNPGLLETSEGCRQILGQLQPSLQTGSEELRSLYNTIAVLYCVHQRIDVKDTKEALDKIEEEQNKSKKKAQQAAADTGNNSQVSQNYPIVQNLQGQMVHQAISPRTLNAWVKVVEEKAFSPEVIPMFSALSEGATPQDLNTMLNTVGGHQAAMQMLKETINEEAAEWDRLHPVHAGPIAPGQMREPRGSDIAGTTSTLQEQIGWMTHNPPIPVGEIYKRWIILGLNKIVRMYSPTSILDIRQGPKEPFRDYVDRFYKTLRAEQASQEVKNWMTETLLVQNANPDCKTILKALGPGATLEEMMTACQGVGGPGHKARVLAEAMSQVTNPATIMIQKGNFRNQRKTVKCFNCGKEGHIAKNCRAPRKKGCWKCGKEGHQMKDCTERQANFLGKIWPSHKGRPGNFLQSRPEPTAPPEESFRFGEETTTPSQKQEPIDKELYPLASLRSLFGSDPSSQ</string>
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            </protein_or_peptide>
        </macromolecule_list>
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            <method>subtomogramAveraging</method>
            <aggregation_state>particle</aggregation_state>
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                <subtomogram_averaging_preparation preparation_id="1">
                    <buffer>
                        <ph>7.4</ph>
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                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </subtomogram_averaging_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <subtomogram_averaging_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">1.5</nominal_defocus_min>
                    <nominal_defocus_max units="µm">5.5</nominal_defocus_max>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON IV (4k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">3.0</average_electron_dose_per_image>
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                    <resolution units="Å" res_type="BY AUTHOR">7.3</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
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                    <type>MAXIMUM LIKELIHOOD</type>
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        <label>::::EMDATABANK.org::::EMD-47842::::</label>
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