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    <admin>
        <current_status>
            <date>2025-08-13</date>
            <code>REL</code>
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                        <revision_type>INITIAL_RELEASE</revision_type>
                        <provider>REPOSITORY</provider>
                    </model>
                </change_list>
            </revision>
        </revision_history>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2024-11-27</deposition>
            <header_release>2025-08-13</header_release>
            <map_release>2025-08-13</map_release>
            <update>2025-08-13</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Bill &amp; Melinda Gates Foundation</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>NCS.1.1 Fab in complex with the sNAp of A/California/04/2009 (CA09, H1N1) -- 4 Fabs [C4 Reconstruction]</title>
        <authors_list>
            <author>Borst AJ</author>
        </authors_list>
        <keywords>Neuraminidase, NCS.1.1, Tetramer, Antibody, Fab, N1, H1N5, CA09, VIRAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-9096-9701" order="1">Lederhofer J</author>
                    <author ORCID="0000-0003-4297-7824" order="2">Borst AJ</author>
                    <author order="3">Nguyen L</author>
                    <author ORCID="0000-0001-5741-3699" order="4">Gillespie RA</author>
                    <author order="5">Williams CJ</author>
                    <author ORCID="0009-0007-6867-211X" order="6">Walker EL</author>
                    <author order="7">Raab JE</author>
                    <author order="8">Yap C</author>
                    <author order="9">Ellis D</author>
                    <author ORCID="0000-0002-3087-8397" order="10">Creanga A</author>
                    <author order="11">Tan HX</author>
                    <author order="12">Do THT</author>
                    <author ORCID="0009-0005-9600-0551" order="13">Ravichandran M</author>
                    <author ORCID="0000-0003-0616-9117" order="14">McDermott AB</author>
                    <author order="15">Le Sage V</author>
                    <author ORCID="0000-0002-2583-1949" order="16">Andrews SF</author>
                    <author order="17">Graham BS</author>
                    <author ORCID="0000-0002-5593-9387" order="18">Wheatley AK</author>
                    <author ORCID="0000-0003-0076-9023" order="19">Reed DS</author>
                    <author ORCID="0000-0002-2978-4692" order="20">King NP</author>
                    <author ORCID="0000-0001-5767-1532" order="21">Kanekiyo M</author>
                    <title>Structural convergence and water-mediated substrate mimicry enable broad neuraminidase inhibition by human antibodies.</title>
                    <journal_abbreviation>Nat Commun</journal_abbreviation>
                    <country>UK</country>
                    <volume>16</volume>
                    <first_page>7068</first_page>
                    <last_page>7068</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40750617</external_references>
                    <external_references type="DOI">doi:10.1038/s41467-025-62339-z</external_references>
                    <external_references type="ISSN">2041-1723</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
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                <pdb_id>9ejf</pdb_id>
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                <accession_id>EMD-48102</accession_id>
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                <details>NCS.1.1 Fab in complex with the sNAp of A/California/04/2009 (CA09, H1N1) -- 4 Fabs</details>
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    </crossreferences>
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                <name>NCS.1.1 Fab in complex with the sNAp of A/California/04/2009 (CA09, H1N1) -- 4 Fabs</name>
                <parent>0</parent>
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                    <macromolecule>
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                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
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                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
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                <natural_source database="NCBI">
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                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
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VRIGSKGDVFVIREPFISCSPLECRTFFLTQGALLNDKHSNGTIKDRSPYRTLMSVPIGSVPSPYNARFESIAWSASACH
DGINWLTIGITGPDNGAVAILKYNGIITDTIKSWRNNILRTQESECACVNGSCFTVMTDGPSNGQASYKIFRIEKGKIVK
SVEMNAPNYHYEECSCYPDSSEITCVCRDNWHGSNRPWVSFNQNLEYQIGYICSGIFGDNPRPNDKTGSCGPVSSNGANG
VKGFSFKYGNGVWIGRTKSISSRNGFEMIWDPNGWTGTDNNFSIKQDIVGINEWSGYSGSFVMHPELTGLDCIVPCFWVE
LIRGRPKENTIWTSGSSISFCGVNSDTTGWSWPDGAELPFTIDK</string>
                    <external_references type="UNIPROTKB">A0A024D2C1</external_references>
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                <ec_number>3.2.1.18</ec_number>
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                <natural_source database="NCBI">
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                <number_of_copies>4</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>QVQLQESGPRLVKPSETLSLTCSVSGESISSGGYYWTWIRQHPGKGLEWIGNIFDTGSTDYSPSLKTRLTISIDTSKNQF
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                <natural_source database="NCBI">
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                <molecular_weight>
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                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>DIVMTQSPLSLPVTPGEPASISCRSSQSLLHSNGYTYLDWYLQKPGQSPQLLISFTSNRASGVPDRFSGSGSGTYFTLKI
SRVEAEDVGVYYCMQAVQTPWTFGQGTKVEIK</string>
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                </molecular_weight>
                <number_of_copies>8</number_of_copies>
                <formula>NAG</formula>
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            <ligand macromolecule_id="6">
                <name>CALCIUM ION</name>
                <molecular_weight>
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                <formula>CA</formula>
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                <number_of_copies>918</number_of_copies>
                <formula>HOH</formula>
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