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    <admin>
        <current_status>
            <date>2024-11-20</date>
            <code>REL</code>
            <processing_site>PDBe</processing_site>
        </current_status>
        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-12-20</deposition>
            <header_release>2022-04-13</header_release>
            <map_release>2022-04-13</map_release>
            <update>2024-11-20</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Medical Research Council (MRC, United Kingdom)</funding_body>
                <code>MR/L009609/1</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Medical Research Council (MRC, United Kingdom)</funding_body>
                <code>MC_UP_1201/15</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>1R01-GM135550</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>206171/Z/17/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Wellcome Trust</funding_body>
                <code>202905/Z/16/Z</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of human full-length extrasynaptic alpha4beta3delta GABA(A)R in complex with GABA, histamine and nanobody Nb25 in a pre-open/closed state</title>
        <authors_list>
            <author>Sente A</author>
            <author>Desai R</author>
        </authors_list>
        <keywords>pentameric ligand-gated ion channel, neurotransmitter receptor, GABA receptor, MEMBRANE PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Sente A</author>
                    <author order="2">Desai R</author>
                    <author order="3">Naydenova K</author>
                    <author order="4">Malinauskas T</author>
                    <author order="5">Jounaidi Y</author>
                    <author order="6">Miehling J</author>
                    <author order="7">Zhou X</author>
                    <author order="8">Masiulis S</author>
                    <author order="9">Hardwick SW</author>
                    <author order="10">Chirgadze DY</author>
                    <author order="11">Miller KW</author>
                    <author order="12">Aricescu AR</author>
                    <title>Differential assembly diversifies GABA A receptor structures and signalling.</title>
                    <journal_abbreviation>Nature</journal_abbreviation>
                    <country>UK</country>
                    <volume>604</volume>
                    <first_page>190</first_page>
                    <last_page>194</last_page>
                    <year>2022</year>
                    <external_references type="PUBMED">35355020</external_references>
                    <external_references type="DOI">doi:10.1038/s41586-022-04517-3</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>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7qn9</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Human full-length extrasynaptic alpha4beta3delta GABA(A)R in complex with histamine and nanobody Nb25</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Human full-length extrasynaptic alpha4beta3delta GABA(A)R in complex with histamine and nanobody Nb25</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>
                <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>Gamma-aminobutyric acid receptor subunit alpha-4</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.061696047</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MVSAKKVPAIALSAGVSFALLRFLCLAVCLNESPGQNQKEEKLCTENFTRILDSLLDGYDNRLRPGFGGPVTEVKTDIYV
TSFGPVSDVEMEYTMDVFFRQTWIDKRLKYDGPIEILRLNNMMVTKVWTPDTFFRNGKKSVSHNMTAPNKLFRIMRNGTI
LYTMRLTISAECPMRLVDFPMDGHACPLKFGSYAYPKSEMIYTWTKGPEKSVEVPKESSSLVQYDLIGQTVSSETIKSIT
GEYIVMTVYFHLRRKMGYFMIQTYIPCIMTVILSQVSFWINKESVPARTVFGITTVLTMTTLSISARHSLPKVSYATAMD
WFIAVCFAFVFSALIEFAAVNYFTNIQMEKAKRKTSKPPQEVPAAPVQREKHPEAPLQNTNANLNMRKRTNALVHSESDV
GNRTEVGNHSSKSSTVVQESSKGTPRSYLASSPNPFSRANAAETISAARALPSASPTSIRTGYMPRKASVGSASTRHVFG
SRLQRIKTTVNTIGATGKLSATPPPSAPPPSGSGTSKIDKYARILFPVTFGAFNMVYWVVYLSKDTMEKSESLM</string>
                    <external_references type="UNIPROTKB">P48169</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Gamma-aminobutyric acid receptor subunit beta-3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.054180347999999996</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>MWGLAGGRLFGIFSAPVLVAVVCCAQSVNDPGNMSFVKETVDKLLKGYDIRLRPDFGGPPVCVGMNIDIASIDMVSEVNM
DYTLTMYFQQYWRDKRLAYSGIPLNLTLDNRVADQLWVPDTYFLNDKKSFVHGVTVKNRMIRLHPDGTVLYGLRITTTAA
CMMDLRRYPLDEQNCTLEIESYGYTTDDIEFYWRGGDKAVTGVERIELPQFSIVEHRLVSRNVVFATGAYPRLSLSFRLK
RNIGYFILQTYMPSILITILSWVSFWINYDASAARVALGITTVLTMTTINTHLRETLPKIPYVKAIDMYLMGCFVFVFLA
LLEYAFVNYIFFGRGPQRQKKLAEKTAKAKNDRSKSESNRVDAHGNILLTSLEVHNEMNEVSGGIGDTRNSAISFDNSGI
QYRKQSMPREGHGRFLGDRSLPHKKTHLRRRSSQLKIKIPDLTDVNAIDRWSRIVFPFTFSLFNLVYWLYYVN</string>
                    <external_references type="UNIPROTKB">P28472</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Gamma-aminobutyric acid receptor subunit delta</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.052437925999999996</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDAPARLLAPLLLLCAQQLRGTRAMNDIGDYVGSNLEISWLPNLDGLIAGYARNFRPGIGGPPVNVALALEVASIDHISE
ANMEYTMTVFLHQSWRDSRLSYNHTNETLGLDSRFVDKLWLPDTFIVNAKSAWFHDVTVENKLIRLQPDGVILYSIRITS
TVACDMDLAKYPMDEQECMLDLESYGYSSEDIVYYWSESQEHIHGLDKLQLAQFTITSYRFTTELMNFKSAGQFPRLSLH
FHLRRNRGVYIIQSYMPSVLLVAMSWVSFWISQAAVPARVSLGITTVLTMTTLMVSARSSLPRASAIKALDVYFWICYVF
VFAALVEYAFAHFNADYRKKQKAKVKVSRPRAEMDVRNAIVLFSLSAAGVTQELAISRRQRRVPGNLMGSYRSVGVETGE
TKKEGAARSGGQGGIRARLRPIDADTIDIYARAVFPAAFAAVNVIYWAAYAMGGSGGSGGSGKTETSQVAPA</string>
                    <external_references type="UNIPROTKB">O14764</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Nanobody Nb25</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013341740999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>QVQLVESGGGLVQGSLRLSCAASGHTFNYPIMGWFRQAPGKEREFVGAISWSGGSTSYADSVKDRFTISRDNAKNTVYLE
MNNLKPEDTAVYYCAAKGRYSGGLYYPTNYDYWGQGTQVTV</string>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="8">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>NAG</formula>
            </ligand>
            <ligand macromolecule_id="9">
                <name>HISTAMINE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000111145</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>HSM</formula>
            </ligand>
            <ligand macromolecule_id="10">
                <name>HEXADECANE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000226441</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>R16</formula>
            </ligand>
            <ligand macromolecule_id="11">
                <name>DECANE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000142282</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>D10</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">
                    <buffer>
                        <ph>7.6</ph>
                        <component>
                            <concentration units="mM">300.0</concentration>
                            <formula>NaCl</formula>
                            <name>Sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">50.0</concentration>
                            <name>HEPES</name>
                        </component>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">287</chamber_temperature>
                        <instrument>LEICA PLUNGER</instrument>
                    </vitrification>
                </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">50.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.7000000000000001</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.1</nominal_defocus_max>
                    <nominal_magnification>130000.0</nominal_magnification>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <specialist_optics>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">20</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <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">40.0</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>
                <startup_model type_of_model="OTHER">
                    <details>AB INITIO MODEL</details>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">2.9</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                    <number_images_used>92694</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <software_list>
                        <software>
                            <name>RELION</name>
                            <version>3.1</version>
                        </software>
                    </software_list>
                </final_three_d_classification>
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        </structure_determination>
    </structure_determination_list>
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            <space_group>1</space_group>
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        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
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            <a units="Å">259.84</a>
            <b units="Å">259.84</b>
            <c units="Å">259.84</c>
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            <beta units="deg">90.0</beta>
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        <axis_order>
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            <minimum>-0.031287134</minimum>
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            <average>-0.00007518729</average>
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                <refinement_protocol>AB INITIO MODEL</refinement_protocol>
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