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    <admin>
        <current_status>
            <date>2022-02-16</date>
            <code>REL</code>
            <processing_site>PDBj</processing_site>
        </current_status>
        <sites>
            <deposition>PDBj</deposition>
            <last_processing>PDBj</last_processing>
        </sites>
        <key_dates>
            <deposition>2021-07-02</deposition>
            <header_release>2021-10-13</header_release>
            <map_release>2021-10-13</map_release>
            <update>2022-02-16</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>21704064</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>81773792</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>81973373</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>31800621</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>31770796</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>31971178</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>81872915</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>82073904</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>31825010</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Science Foundation (NSF, China)</funding_body>
                <code>81525024</code>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of the cholecystokinin receptor CCKBR in complex with gastrin-17 and Gi</title>
        <authors_list>
            <author>Zhang X</author>
            <author>He C</author>
            <author>Wang M</author>
            <author>Zhou Q</author>
            <author>Yang D</author>
            <author>Zhu Y</author>
            <author>Wu B</author>
            <author>Zhao Q</author>
        </authors_list>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Zhang X</author>
                    <author order="2">He C</author>
                    <author order="3">Wang M</author>
                    <author order="4">Zhou Q</author>
                    <author order="5">Yang D</author>
                    <author order="6">Zhu Y</author>
                    <author order="7">Feng W</author>
                    <author order="8">Zhang H</author>
                    <author order="9">Dai A</author>
                    <author order="10">Chu X</author>
                    <author order="11">Wang J</author>
                    <author order="12">Yang Z</author>
                    <author order="13">Jiang Y</author>
                    <author order="14">Sensfuss U</author>
                    <author order="15">Tan Q</author>
                    <author order="16">Han S</author>
                    <author order="17">Reedtz-Runge S</author>
                    <author order="18">Xu HE</author>
                    <author order="19">Zhao S</author>
                    <author order="20">Wang MW</author>
                    <author order="21">Wu B</author>
                    <author order="22">Zhao Q</author>
                    <title>Structures of the human cholecystokinin receptors bound to agonists and antagonists.</title>
                    <journal_abbreviation>Nat.Chem.Biol.</journal_abbreviation>
                    <country>US</country>
                    <volume>17</volume>
                    <first_page>1230</first_page>
                    <last_page>1237</last_page>
                    <year>2021</year>
                    <external_references type="PUBMED">34556863</external_references>
                    <external_references type="DOI">doi:10.1038/s41589-021-00866-8</external_references>
                    <external_references type="ISSN">1552-4469</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-31493</emdb_id>
                <relationship>
                    <other>associated EM volume</other>
                </relationship>
                <details>Cryo-EM structure of the cholecystokinin receptor CCKBR in complex with gastrin-17 and Gi</details>
            </emdb_reference>
            <emdb_reference>
                <emdb_id>EMD-31494</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
            </emdb_reference>
        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7f8v</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Cholecystokinin recetor CCKBR in complex with gastrin-17 and Gi</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>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>Guanine nucleotide-binding protein G(i) subunit</name>
                <parent>1</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>5</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="3">
                <name>Gastrin-17</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="4">
                <name>cholecystokinin type B receptor</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Guanine nucleotide-binding protein G(i) subunit alpha-2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.04050286299999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MGCTVSAEDKAAAERSKMIDKNLREDGEKAAREVKLLLLGAGESGKNTIVKQMKIIHEDGYSEEECRQYRAVVYSNTIQS
IMAIVKAMGNLQIDFADPSRADDARQLFALSCTAEEQGVLPDDLSGVIRRLWADHGVQACFGRSREYQLNDSAAYYLNDL
ERIAQSDYIPTQQDVLRTRVKTTGIVETHFTFKDLHFKMFDVGAQRSERKKWIHCFEGVTAIIFCVALSAYDLVLAEDEE
MNRMHASMKLFDSICNNKWFTDTSIILFLNKKDLFEEKITHSPLTICFPEYTGANKYDEAASYIQSKFEDLNKRKDTKEI
YTHFTCSTDTKNVQFVFDAVTDVIIKNNLKDCGLF</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.038744371</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MHHHHHHGSLLQSELDQLRQEAEQLKNQIRDARKACADATLSQITNNIDPVGRIQMRTRRTLRGHLAKIYAMHWGTDSRL
LVSASQDGKLIIWDSYTTNKVHAIPLRSSWVMTCAYAPSGNYVACGGLDNICSIYNLKTREGNVRVSRELAGHTGYLSCC
RFLDDNQIVTSSGDTTCALWDIETGQQTTTFTGHTGDVMSLSLAPDTRLFVSGACDASAKLWDVREGMCRQTFTGHESDI
NAICFFPNGNAFATGSDDATCRLFDLRADQELMTYSHDNIICGITSVSFSKSGRLLLAGYDDFNCNVWDALKADRAGVLA
GHDNRVSCLGVTDDGMAVATGSWDSFLKIWN</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.007861143</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MASNNTASIAQARKLVEQLKMEANIDRIKVSKAAADLMAYCEAHAKEDPLLTPVPASENPFREKKFFCAIL</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Gastrin-17</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.002098203</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>(PCA)GPWLEEEEEAYGWMD(NFA)</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Gastrin/cholecystokinin type B receptor</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.05052492199999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="274590">Baculovirus expression vector pFastBac1-HM</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>DYKDDDDGAPELLKLNRSVQGTGPGPGASLCRPGAPLLNSSSVGNLSCEPPRIRGAGTRELELAIRITLYAVIFLMSVGG
NMLIIVVLGLSRRLRTVTNAFLLSLAVSDLLLAVACMPFTLLPNLMGTFIFGTVICKAVSYLMGVSVSVSTLSLVAIALE
RYSAICRPLQARVWQTRSHAARVIVATWLLSGLLMVPYPVYTVVQPVGPRVLQCVHRWPSARVRQTWSVLLLLLLFFIPG
VVMAVAYGLISRELYLGLRFDGDSDSDSQSRVRNQGGLPGAVHQNGRCRPETGAVGEDSDGCYVQLPRSRPALELTALTA
PGPGSGSRPTQAKLLAKKRVVRMLLVIVVLFFLCWLPVYSANTWRAFDGPGAHRALSGAPISFIHLLSYASACVNPLVYC
FMHRRFRQACLETCARCCPRPPRARPREFLEVLFQGPWSHPQFEKGGGSGGGSGGSAWSHPQFEK</string>
                </sequence>
            </protein_or_peptide>
        </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>7.5</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>SPOT SCAN</illumination_mode>
                    <imaging_mode>BRIGHT FIELD</imaging_mode>
                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 BIOQUANTUM (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">1.75</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>
                <final_reconstruction>
                    <resolution res_type="BY AUTHOR" units="Å">3.3</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>1338153</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <file>emd_31493.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>256</col>
            <row>256</row>
            <sec>256</sec>
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            <y>256</y>
            <z>256</z>
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        <cell>
            <a units="Å">267.52</a>
            <b units="Å">267.52</b>
            <c units="Å">267.52</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
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        <statistics>
            <minimum>-0.1435475</minimum>
            <maximum>0.19958228</maximum>
            <average>0.00021801518</average>
            <std>0.003145358</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">1.045</x>
            <y units="Å">1.045</y>
            <z units="Å">1.045</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.035</level>
                <source>AUTHOR</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-31493::::</label>
        <annotation_details>CCKBR-Gi complex</annotation_details>
    </map>
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