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    <admin>
        <current_status>
            <date>2024-10-16</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2018-05-14</deposition>
            <header_release>2018-06-06</header_release>
            <map_release>2019-11-06</map_release>
            <update>2024-10-16</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>UM1 AI100663</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Bill &amp; Melinda Gates Foundation</funding_body>
                <code>OPP1115782</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Bill &amp; Melinda Gates Foundation</funding_body>
                <code>OPP1084519</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>BG505 MD39 SOSIP trimer in complex with mature BG18 fragment antigen binding</title>
        <authors_list>
            <author>Ozorowski G</author>
            <author>Steichen JM</author>
        </authors_list>
        <keywords>HIV-1, HIV Envelope, SOSIP, germline targeting, antibody, VIRAL PROTEIN, VIRAL PROTEIN-IMMUNE SYSTEM complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Steichen JM</author>
                    <author order="2">Lin YC</author>
                    <author order="3">Havenar-Daughton C</author>
                    <author order="4">Pecetta S</author>
                    <author order="5">Ozorowski G</author>
                    <author order="6">Willis JR</author>
                    <author order="7">Toy L</author>
                    <author order="8">Sok D</author>
                    <author order="9">Liguori A</author>
                    <author order="10">Kratochvil S</author>
                    <author order="11">Torres JL</author>
                    <author order="12">Kalyuzhniy O</author>
                    <author order="13">Melzi E</author>
                    <author order="14">Kulp DW</author>
                    <author order="15">Raemisch S</author>
                    <author order="16">Hu X</author>
                    <author order="17">Bernard SM</author>
                    <author order="18">Georgeson E</author>
                    <author order="19">Phelps N</author>
                    <author order="20">Adachi Y</author>
                    <author order="21">Kubitz M</author>
                    <author order="22">Landais E</author>
                    <author order="23">Umotoy J</author>
                    <author order="24">Robinson A</author>
                    <author order="25">Briney B</author>
                    <author order="26">Wilson IA</author>
                    <author order="27">Burton DR</author>
                    <author order="28">Ward AB</author>
                    <author order="29">Crotty S</author>
                    <author order="30">Batista FD</author>
                    <author order="31">Schief WR</author>
                    <title>A generalized HIV vaccine design strategy for priming of broadly neutralizing antibody responses.</title>
                    <journal_abbreviation>Science</journal_abbreviation>
                    <country>US</country>
                    <volume>366</volume>
                    <year>2019</year>
                    <external_references type="PUBMED">31672916</external_references>
                    <external_references type="DOI">doi:10.1126/science.aax4380</external_references>
                    <external_references type="ISSN">1095-9203</external_references>
                    <external_references type="CSD">0038</external_references>
                    <external_references type="ASTM">SCIEAS</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
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                <emdb_id>EMD-7876</emdb_id>
                <relationship>
                    <other>other EM volume</other>
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        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>6dfg</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
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            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>BG505 MD39 SOSIP trimer in complex with mature BG18 fragment antigen binding</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>BG505 MD39 SOSIP trimer in complex with mature BG18 fragment antigen binding</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>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <molecular_weight>
                    <theoretical units="MDa">0.57</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>SOSIP trimer</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="3">
                <name>BG18 fragment</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </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">
                <name>Envelope glycoprotein gp160</name>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.053302312</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>AENLWVTVYYGVPVWKDAETTLFCASDAKAYETEKHNVWATHACVPTDPNPQEIHLENVTEEFNMWKNNMVEQMHEDIIS
LWDQSLKPCVKLTPLCVTLQCTNVTNNITDDMRGELKNCSFNMTTELRDKKQKVYSLFYRLDVVQINENQGNRSNNSNKE
YRLINCNTSAITQACPKVSFEPIPIHYCAPAGFAILKCKDKKFNGTGPCPSVSTVQCTHGIKPVVSTQLLLNGSLAEEEV
IIRSENITNNAKNILVQLNTPVQINCTRPNNNTVKSIRIGPGQAFYYTGDIIGDIRQAHCNVSKATWNETLGKVVKQLRK
HFGNNTIIRFAQSSGGDLEVTTHSFNCGGEFFYCNTSGLFNSTWISNTSVQGSNSTGSNDSITLPCRIKQIINMWQRIGQ
AMYAPPIQGVIRCVSNITGLILTRDGGSTNSTTETFRPGGGDMRDNWRSELYKYKVVKIEPLGVAPTRCKRRVVGR</string>
                    <external_references type="UNIPROTKB">Q2N0S6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Envelope glycoprotein gp160</name>
                <natural_source database="NCBI">
                    <organism ncbi="11676">Human immunodeficiency virus 1</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.018250541</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>AVGIGAVSLGFLGAAGSTMGAASMTLTVQARNLLSGIVQQQSNLLRAPEPQQHLLKDTHWGIKQLQARVLAVEHYLRDQQ
LLGIWGCSGKLICCTNVPWNSSWSNRNLSEIWDNMTWLQWDKEISNYTQIIYGLLEESQNQQEKNEQDLLALDGTKHHHH
HH</string>
                    <external_references type="UNIPROTKB">Q2N0S8</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>mature BG18 fragment antigen binding heavy chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.025043186000000002</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>QVQLRESGPGLVKPSETLSLSCTVSNDSRPSDHSWTWVRQSPGKALEWIGDIHYNGATTYNPSLRSRVRIELDQSIPRFS
LKMTSMTAADTGMYYCARNAIRIYGVVALGEWFHYGMDVWGQGTAVTVSSASTKGPSVFPLAPSSKSTSGGTAALGCLVK
DYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSVVTVPSSSLGTQTYICNVNHKPSNTKVDKKVEPKSC</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>mature BG18 fragment antigen binding light chain</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.022937351999999998</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>SSELTQPPSVSVSPGQTARITCSGAPLTSRFTYWYRQKPGQAPVLIISRSSQRSSGWSGRFSASWSGTTVTLTIRGVQAD
DEADYYCQSSDTSDSYKMFGGGTKLTVLGQPKAAPSVTLFPPSSEELQANKATLVCLISDFYPGAVTVAWKADSSPVKAG
VETTTPSKQSNNKYAASSYLSLTPEQWKSHRSYSCQVTHEGSTVEKTVAPTECS</string>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="11">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>18</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">4.75</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <name>Tris</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <formula>NaCl</formula>
                            <name>Sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">0.06</concentration>
                            <name>n-Dodecyl-B-D-Maltopyranoside</name>
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                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
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                        <pretreatment>
                            <type>PLASMA CLEANING</type>
                            <time units="s">10</time>
                            <atmosphere>OTHER</atmosphere>
                        </pretreatment>
                        <details>Gatan Model 950 Advanced Plasma System</details>
                    </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>
                        <details>3.5 second blot time. </details>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
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                <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">100.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
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                        <coma_free/>
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                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
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                                    <width units="pixel">3710</width>
                                    <height units="pixel">3838</height>
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                            </digitization_details>
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                            <average_exposure_time units="s">12.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">62.0</average_electron_dose_per_image>
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                        <pdb_id>4ZMJ</pdb_id>
                    </pdb_model>
                    <details>PDB converted to MRC map and low pass filtered to 60 A</details>
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