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            <date>2025-05-21</date>
            <code>REL</code>
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            <revision version="1.0" date="2022-02-09">
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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2022-01-24</deposition>
            <header_release>2022-02-09</header_release>
            <map_release>2022-02-09</map_release>
            <update>2025-05-21</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)</funding_body>
                <code>AI145687</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)</funding_body>
                <code>AI165147</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Delta (B.1.617.2) SARS-CoV-2 variant spike protein (S-GSAS-Delta) in the 3-RBD-down conformation; Subclassification D7 state</title>
        <authors_list>
            <author>Gobeil S</author>
            <author>Acharya P</author>
        </authors_list>
        <keywords>SARS-CoV-2 Spike Protein Trimer, VIRAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Gobeil SM</author>
                    <author order="2">Henderson R</author>
                    <author order="3">Stalls V</author>
                    <author order="4">Janowska K</author>
                    <author order="5">Huang X</author>
                    <author order="6">May A</author>
                    <author order="7">Speakman M</author>
                    <author order="8">Beaudoin E</author>
                    <author order="9">Manne K</author>
                    <author order="10">Li D</author>
                    <author order="11">Parks R</author>
                    <author order="12">Barr M</author>
                    <author order="13">Deyton M</author>
                    <author order="14">Martin M</author>
                    <author order="15">Mansouri K</author>
                    <author order="16">Edwards RJ</author>
                    <author order="17">Eaton A</author>
                    <author order="18">Montefiori DC</author>
                    <author order="19">Sempowski GD</author>
                    <author order="20">Saunders KO</author>
                    <author order="21">Wiehe K</author>
                    <author order="22">Williams W</author>
                    <author order="23">Korber B</author>
                    <author order="24">Haynes BF</author>
                    <author order="25">Acharya P</author>
                    <title>Structural diversity of the SARS-CoV-2 Omicron spike.</title>
                    <journal_abbreviation>Mol.Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>82</volume>
                    <first_page>2050</first_page>
                    <last_page>2068.e6</last_page>
                    <year>2022</year>
                    <external_references type="PUBMED">35447081</external_references>
                    <external_references type="DOI">doi:10.1016/j.molcel.2022.03.028</external_references>
                    <external_references type="ISSN">1097-2765</external_references>
                    <external_references type="CSD">2168</external_references>
                    <external_references type="ASTM">MOCEFL</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7toz</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Delta (B.1.617.2) SARS-CoV-2 variant spike protein (S-GSAS-Delta) in the 3-RBD-down conformation; Subclassification D7 state</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Delta (B.1.617.2) SARS-CoV-2 variant spike protein (S-GSAS-Delta) in the 3-RBD-down conformation; Subclassification D7 state</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Spike glycoprotein</name>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.142244328</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MFVFLVLLPLVSSQCVNLRTRTQLPPAYTNSFTRGVYYPDKVFRSSVLHSTQDLFLPFFSNVTWFHAIHVSGTNGTKRFD
NPVLPFNDGVYFASTEKSNIIRGWIFGTTLDSKTQSLLIVNNATNVVIKVCEFQFCNDPFLDVYYHKNNKSWMESGVYSS
ANNCTFEYVSQPFLMDLEGKQGNFKNLREFVFKNIDGYFKIYSKHTPINLVRDLPQGFSALEPLVDLPIGINITRFQTLL
ALHRSYLTPGDSSSGWTAGAAAYYVGYLQPRTFLLKYNENGTITDAVDCALDPLSETKCTLKSFTVEKGIYQTSNFRVQP
TESIVRFPNITNLCPFGEVFNATRFASVYAWNRKRISNCVADYSVLYNSASFSTFKCYGVSPTKLNDLCFTNVYADSFVI
RGDEVRQIAPGQTGKIADYNYKLPDDFTGCVIAWNSNNLDSKVGGNYNYRYRLFRKSNLKPFERDISTEIYQAGSKPCNG
VEGFNCYFPLQSYGFQPTNGVGYQPYRVVVLSFELLHAPATVCGPKKSTNLVKNKCVNFNFNGLTGTGVLTESNKKFLPF
QQFGRDIADTTDAVRDPQTLEILDITPCSFGGVSVITPGTNTSNQVAVLYQGVNCTEVPVAIHADQLTPTWRVYSTGSNV
FQTRAGCLIGAEHVNNSYECDIPIGAGICASYQTQTNSRGSASSVASQSIIAYTMSLGAENSVAYSNNSIAIPTNFTISV
TTEILPVSMTKTSVDCTMYICGDSTECSNLLLQYGSFCTQLNRALTGIAVEQDKNTQEVFAQVKQIYKTPPIKDFGGFNF
SQILPDPSKPSKRSFIEDLLFNKVTLADAGFIKQYGDCLGDIAARDLICAQKFNGLTVLPPLLTDEMIAQYTSALLAGTI
TSGWTFGAGAALQIPFAMQMAYRFNGIGVTQNVLYENQKLIANQFNSAIGKIQDSLSSTASALGKLQNVVNQNAQALNTL
VKQLSSNFGAISSVLNDILSRLDKVEAEVQIDRLITGRLQSLQTYVTQQLIRAAEIRASANLAATKMSECVLGQSKRVDF
CGKGYHLMSFPQSAPHGVVFLHVTYVPAQEKNFTTAPAICHDGKAHFPREGVFVSNGTHWFVTQRNFYEPQIITTDNTFV
SGNCDVVIGIVNNTVYDPLQPELDSFKEELDKYFKNHTSPDVDLGDISGINASVVNIQKEIDRLNEVAKNLNESLIDLQE
LGKYEQGSGYIPEAPRDGQAYVRKDGEWVLLSTFLGRSLEVLFQGPGHHHHHHHHSAWSHPQFEKGGGSGGGGSGGSAWS
HPQFEK</string>
                    <external_references type="UNIPROTKB">P0DTC2</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="3">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>32</number_of_copies>
                <formula>NAG</formula>
            </ligand>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">1.5</concentration>
                    <buffer>
                        <ph>8.0</ph>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
                    <illumination_mode>OTHER</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">0.75</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.5</nominal_defocus_max>
                    <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">55.0</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="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>7KDK</pdb_id>
                    </pdb_model>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">4.07</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>55198</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </final_angle_assignment>
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        </structure_determination>
    </structure_determination_list>
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        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>300</col>
            <row>300</row>
            <sec>300</sec>
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            <row>0</row>
            <sec>0</sec>
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            <x>300</x>
            <y>300</y>
            <z>300</z>
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        <cell>
            <a units="Å">324.0</a>
            <b units="Å">324.0</b>
            <c units="Å">324.0</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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            <minimum>-0.54000986</minimum>
            <maximum>2.529913</maximum>
            <average>-0.004062118</average>
            <std>0.13032952</std>
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        <pixel_spacing>
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            <y units="Å">1.08</y>
            <z units="Å">1.08</z>
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            <contour primary="true">
                <level>0.8</level>
                <source>AUTHOR</source>
            </contour>
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        <label>::::EMDATABANK.org::::EMD-26042::::</label>
        <annotation_details>Delta (B.1.617.2) SARS-CoV-2 variant spike protein (S-GSAS-Delta) in the 3-RBD-down conformation; Subclassification D7 state</annotation_details>
    </map>
    <interpretation>
        <modelling_list>
            <modelling>
                <initial_model>
                    <access_code>7KDK</access_code>
                    <chain>
                        <source_name>PDB</source_name>
                        <initial_model_type>experimental model</initial_model_type>
                    </chain>
                </initial_model>
                <refinement_protocol>AB INITIO MODEL</refinement_protocol>
            </modelling>
        </modelling_list>
    </interpretation>
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