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    <admin>
        <current_status>
            <date>2024-11-13</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2019-04-25</deposition>
            <header_release>2019-06-12</header_release>
            <map_release>2020-10-21</map_release>
            <update>2024-11-13</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Other private</funding_body>
                <code>109718-63-RKNT</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01GM069832</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>CD4- and 17-bound HIV-1 Env B41 SOSIP in complex with small molecule GO35</title>
        <authors_list>
            <author>Ozorowski G</author>
            <author>Torres JL</author>
        </authors_list>
        <keywords>HIV-1, Env, CD4, receptor-bound state, small molecule, fusion inhibitor, VIRAL PROTEIN, VIRAL PROTEIN-Immune System complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Ozorowski G</author>
                    <author order="2">Torres JL</author>
                    <author order="3">Santos-Martins D</author>
                    <author order="4">Forli S</author>
                    <author order="5">Ward AB</author>
                    <title>A Strain-Specific Inhibitor of Receptor-Bound HIV-1 Targets a Pocket near the Fusion Peptide.</title>
                    <journal_abbreviation>Cell Rep</journal_abbreviation>
                    <country>US</country>
                    <volume>33</volume>
                    <first_page>108428</first_page>
                    <last_page>108428</last_page>
                    <year>2020</year>
                    <external_references type="PUBMED">33238117</external_references>
                    <external_references type="DOI">doi:10.1016/j.celrep.2020.108428</external_references>
                    <external_references type="ISSN">2211-1247</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-9695-8138" order="6">Ozorowski G</author>
                    <author ORCID="0000-0003-0137-8497" order="7">Torres JL</author>
                    <author order="8">Santos-Martins D</author>
                    <author order="9">Forli S</author>
                    <author ORCID="0000-0001-7153-3769" order="10">Ward AB</author>
                    <title>A strain-specific inhibitor of receptor-bound HIV-1 targets a pocket near the fusion peptide and offers a template for drug design</title>
                    <journal_abbreviation>Biorxiv</journal_abbreviation>
                    <country>US</country>
                    <year>2020</year>
                    <external_references type="DOI">doi:10.1101/2020.06.11.146654v1</external_references>
                    <external_references type="ISSN">2692-8205</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>6opn</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>CD4- and 17b-bound HIV-1 Env B41 SOSIP in complex with small molecule GO35</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>CD4- and 17b-bound HIV-1 Env B41 SOSIP in complex with small molecule GO35</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.05</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>17b fragment antigen binding</name>
                <parent>1</parent>
                <details>17b Fab added to aid in particle tumbling and initial alignments. Most of the Fab was masked out during final refinements to increase resolution of particle core and small molecule binding pocket.</details>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Envelope glycoprotein gp160</name>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.058872902</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>MDAMKRGLCCVLLLCGAVFVSPSQEIHARFRRGARAAKKWVTVYYGVPVWKEATTTLFCASDAKAYDTEVHNVWATHACV
PTDPNPQEIVLGNVTENFNMWKNNMVEQMHEDIISLWDQSLKPCVKLTPLCVTLNCNNVNTNNTNNSTNATISDWEKMET
GEMKNCSFNVTTSIRDKIKKEYALFYKLDVVPLENKNNINNTNITNYRLINCNTSVITQACPKVSFEPIPIHYCAPAGFA
ILKCNSKTFNGSGPCTNVSTVQCTHGIRPVVSTQLLLNGSLAEEEIVIRSENITDNAKTIIVQLNEAVEINCTRPNNNTR
KSIHIGPGRAFYATGDIIGNIRQAHCNISKARWNETLGQIVAKLEEQFPNKTIIFNHSSGGDPEIVTHSFNCGGEFFYCN
TTPLFNSTWNNTRTDDYPTGGEQNITLQCRIKQIINMWQGVGKAMYAPPIRGQIRCSSNITGLLLTRDGGRDQNGTETFR
PGGGNMRDNWRSELYKYKVVKIEPLGIAPTACKRRVVQRRRRRR</string>
                    <external_references type="UNIPROTKB">B3UES2</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Envelope glycoprotein gp41</name>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                    <strain>B41</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.017357824</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>AVGLGAFILGFLGAAGSTMGAASMALTVQARLLLSGIVQQQNNLLRAPEAQQHMLQLTVWGIKQLQARVLAVERYLRDQQ
LLGIWGCSGKIICCTNVPWNDSWSNKTINEIWDNMTWMQWEKEIDNYTQHIYTLLEVSQIQQEKNEQELLELD</string>
                    <external_references type="UNIPROTKB">B3UEZ6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>T-cell surface glycoprotein CD4</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.023039171999999997</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>METDTLLLWVLLLWVPGSTGKKVVLGKKGDTVELTCTASQKKSIQFHWKNSNQIKILGNQGSFLTKGPSKLNDRADSRRS
LWDQGNFPLIIKNLKIEDSDTYICEVEDQKEEVQLLVFGLTANSDTHLLQGQSLTLTLESPPGSSPSVQCRSPRGKNIQG
GKTLSVSQLELQDSGTWTCTVLQNQKKVEFKIDIVVLAGGSGHHHHHH</string>
                    <external_references type="UNIPROTKB">P01730</external_references>
                </sequence>
            </protein_or_peptide>
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                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>27</number_of_copies>
                <formula>NAG</formula>
            </ligand>
            <ligand macromolecule_id="7">
                <name>[3'-(5-methyl-1,3,4-oxadiazol-2-yl)[1,1'-biphenyl]-3-yl](piperidin-1-yl)methanone</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00034741</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>N07</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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        <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">6</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <name>Tris</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <name>NaCl</name>
                        </component>
                        <component>
                            <concentration units="%(v/v)">1.0</concentration>
                            <name>dimethyl sulfoxide</name>
                        </component>
                        <component>
                            <concentration units="mM">0.005</concentration>
                            <name>lauryl maltose neopentyl glycol</name>
                        </component>
                        <details>Detergent (LMNG) added shortly (&lt;5 minutes) prior to grid freezing using an 8X concentrated stock.</details>
                    </buffer>
                    <grid>
                        <model>C-flat-2/2</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>PLASMA CLEANING</type>
                            <time units="s">10</time>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">283</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </vitrification>
                    <details>Complex of CD4- and 17b-bound B41 SOSIP was SEC purified and GO35 was diluted 1:100 into the complex and incubated for 1 hr prior to grid freezing.</details>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN 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>
                    <c2_aperture_diameter units="µm">70.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.6</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.2</nominal_defocus_max>
                    <nominal_magnification>29000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <detector_mode>COUNTING</detector_mode>
                            <digitization_details/>
                            <number_real_images>1285</number_real_images>
                            <average_exposure_time units="s">12.5</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">60.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
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                <image_recording_id>1</image_recording_id>
                <startup_model type_of_model="EMDB MAP">
                    <emdb_id>EMD-8715</emdb_id>
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                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>C3</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">3.5</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2</version>
                            <processing_details>Non-uniform refinement</processing_details>
                        </software>
                    </software_list>
                    <details>FSC resolution estimation calculated using CryoSparc 2 and Relion 3.0</details>
                    <number_images_used>30415</number_images_used>
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                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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                        <software>
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                            <version>2</version>
                        </software>
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                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2</version>
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