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    <admin>
        <current_status>
            <date>2023-12-13</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2023-04-07</deposition>
            <header_release>2023-08-02</header_release>
            <map_release>2023-08-02</map_release>
            <update>2023-12-13</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Netherlands Organisation for Scientific Research (NWO)</funding_body>
                <code>VI.Veni.202.271</code>
                <country>Netherlands</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Chinese Scholarship Council</funding_body>
                <code>2014-03250042</code>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>Human Coronavirus HKU1 W89A spike glycoprotein incubated with an alpha2,8-linked 9-O-acetylated disialoside (closed state)</title>
        <authors_list>
            <author ORCID="0000-0003-1117-7699">Drulyte I</author>
            <author ORCID="0000-0003-3834-5808">Hurdiss DL</author>
        </authors_list>
        <keywords>Virus, Coronavirus, HKU1, Spike, Glycoprotein, Membrane fusion, viral protein</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0001-5268-7690" order="1">Pronker MF</author>
                    <author ORCID="0000-0002-5998-2171" order="2">Creutznacher R</author>
                    <author order="3">Drulyte I</author>
                    <author order="4">Hulswit RJG</author>
                    <author ORCID="0000-0002-8358-3162" order="5">Li Z</author>
                    <author ORCID="0000-0001-5800-749X" order="6">van Kuppeveld FJM</author>
                    <author ORCID="0000-0002-9310-8226" order="7">Snijder J</author>
                    <author order="8">Lang Y</author>
                    <author ORCID="0000-0002-3864-232X" order="9">Bosch BJ</author>
                    <author order="10">Boons GJ</author>
                    <author ORCID="0000-0002-1006-6746" order="11">Frank M</author>
                    <author ORCID="0000-0002-2207-9472" order="12">de Groot RJ</author>
                    <author ORCID="0000-0003-3834-5808" order="13">Hurdiss DL</author>
                    <title>Sialoglycan binding triggers spike opening in a human coronavirus.</title>
                    <journal_abbreviation>Nature</journal_abbreviation>
                    <country>UK</country>
                    <volume>624</volume>
                    <first_page>201</first_page>
                    <last_page>206</last_page>
                    <year>2023</year>
                    <external_references type="PUBMED">37794193</external_references>
                    <external_references type="DOI">doi:10.1038/s41586-023-06599-z</external_references>
                    <external_references type="ISSN">1476-4687</external_references>
                    <external_references type="CSD">0006</external_references>
                    <external_references type="ASTM">NATUAS</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
    </crossreferences>
    <sample>
        <name>Trimeric spike glycoprotein</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Trimeric spike glycoprotein</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="290028">Human coronavirus HKU1</organism>
                    <strain>Caen1</strain>
                    <cellular_location>membrane</cellular_location>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.44</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Spike glycoprotein</name>
                <natural_source database="NCBI">
                    <organism ncbi="290028">Human coronavirus HKU1</organism>
                    <strain>Caen1</strain>
                </natural_source>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MPMGSLQPLATLYLLGMLVASVLAVIGDFNCTNFAINDLNTTIPRISEYVVDVSYGLGTYYILDRVYLNTTILFTGYFPKSGANFRDLSLKGTTKLSTLAYQKPFLSDFNNGIFSRVKNTKLYVNKTLYSEFSTIVIGSVFINNSYTIVVQPHNGVLEITACQYTMCEYPHTICKSIGSSRNESWHFDKSEPLCLFKKNFTYNVSTDWLYFHFYQERGTFYAYYADSGMPTTFLFSLYLGTLLSHYYVLPLTCNAISSNTDNETLQYWVTPLSKRQYLLKFDDRGVITNAVDCSSSFFSEIQCKTKSLLPNTGVYDLSGFTVKPVATVHRRIPDLPDCDIDKWLNNFNVPSPLNWERKIFSNCNFNLSTLLRLVHTDSFSCNNFDESKIYGSCFKSIVLDKFAIPNSRRSDLQLGSSGFLQSSNYKIDTTSSSCQLYYSLPAINVTINNYNPSSWNRRYGFNNFNLSSHSVVYSRYCFSVNNTFCPCAKPSFASSCKSHKPPSASCPIGTNYRSCESTTVLDHTDWCRCSCLPDPITAYDPRSCSQKKSLVGVGEHCAGFGVDEEKCGVLDGSYNVSCLCSTDAFLGWSYDTCVSNNRCNIFSNFILNGINSGTTCSNDLLQPNTEVFTDVCVDYDLYGITGQGIFKEVSAVYYNSWQNLLYDFNGNIIGFKDFVTNKTYNIFPCYAGRVSAAFHQNASSLALLYRNLKCSYVLNNISLATQPYFDSYLGCVFNADNLTDYSVSSCALRMGSGFCVDYNSPSSSSSGGSGSSISASYRFVTFEPFNVSFVNDSIESVGGLYEIKIPTNFTIVGQEEFIQTNSPKVTIDCSLFVCSNYAACHDLLSEYGTFCDNINSILDEVNGLLDTTQLHVADTLMQGVTLSSNLNTNLHFDVDNINFKSLVGCLGPHCGSSSRSFFEDLLFDKVKLSDVGFVEAYNNCTGGSEIRDLLCVQSFNGIKVLPPILSESQISGYTTAATVAAMFPPWSAAAGIPFSLNVQYRINGLGVTMDVLNKNQKLIATAFNNALLSIQNGFSATNSALAKIQSVVNSNAQALNSLLQQLFNKFGAISSSLQEILSRLDALEAQVQIDRLINGRLTALNAYVSQQLSDISLVKLGAALAMEKVNECVKSQSPRINFCGNGNHILSLVQNAPYGLLFMHFSYKPISFKTVLVSPGLCISGDVGIAPKQGYFIKHNDHWMFTGSSYYYPEPISDKNVVFMNTCSVNFTKAPLVYLNHSVPKLSDFESELSHWFKNQTSIAPNLTLNLHTINATFLDLLIKRMKQIEDKIEEIESKQKKIENEIARIKKIKLVPRGSLEWSHPQFEK</string>
                    <external_references type="UNIPROTKB">E0YJ44</external_references>
                </sequence>
            </protein_or_peptide>
        </macromolecule_list>
    </sample>
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                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <name>Tris-HCl</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <name>EDTA</name>
                        </component>
                        <component>
                            <concentration units="mM">2.5</concentration>
                            <name>D-biotin</name>
                        </component>
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                        <material>COPPER</material>
                        <mesh>200</mesh>
                        <pretreatment>
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                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                    <details>Concentration of protein (N-linked glycans not included due to glycan heterogeneity).</details>
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                                    <height units="pixel">4096</height>
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                            <number_grids_imaged>1</number_grids_imaged>
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                            <average_exposure_time units="s">5.85</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">41.7</average_electron_dose_per_image>
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            <singleparticle_processing image_processing_id="1">
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