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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>2023-05-16</deposition>
            <header_release>2024-06-12</header_release>
            <map_release>2024-06-12</map_release>
            <update>2024-11-20</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>UK Research and Innovation (UKRI)</funding_body>
                <code>BB/V018051/1</code>
                <country>United Kingdom</country>
            </grant_reference>
        </grant_support>
        <title>Structure of human SIT1:ACE2 complex (open PD conformation) bound to L-pipecolate</title>
        <authors_list>
            <author>Li HZ</author>
            <author>Pike ACW</author>
            <author>Chi G</author>
            <author>Hansen JS</author>
            <author>Lee SG</author>
            <author>Rodstrom KEJ</author>
            <author>Bushell SR</author>
            <author>Speedman D</author>
            <author>Evans A</author>
            <author>Wang D</author>
            <author>He D</author>
            <author>Shrestha L</author>
            <author>Nasrallah C</author>
            <author>Chalk R</author>
            <author>Moreira T</author>
            <author>MacLean EM</author>
            <author>Marsden B</author>
            <author>Bountra C</author>
            <author>Burgess-Brown NA</author>
            <author>Dafforn TR</author>
            <author>Carpenter EP</author>
            <author>Sauer DB</author>
        </authors_list>
        <keywords>amino acid transporter, proline, SLC6A20, ACE2, MEMBRANE PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-5482-9936" order="1">Li HZ</author>
                    <author ORCID="0000-0001-9661-2607" order="2">Pike ACW</author>
                    <author ORCID="0000-0001-5627-9897" order="3">Lotsaris I</author>
                    <author ORCID="0000-0001-9910-0965" order="4">Chi G</author>
                    <author order="5">Hansen JS</author>
                    <author order="6">Lee SC</author>
                    <author order="7">Rodstrom KEJ</author>
                    <author order="8">Bushell SR</author>
                    <author order="9">Speedman D</author>
                    <author order="10">Evans A</author>
                    <author ORCID="0000-0002-7379-357X" order="11">Wang D</author>
                    <author order="12">He D</author>
                    <author order="13">Shrestha L</author>
                    <author order="14">Nasrallah C</author>
                    <author order="15">Burgess-Brown NA</author>
                    <author ORCID="0000-0003-1523-4814" order="16">Vandenberg RJ</author>
                    <author order="17">Dafforn TR</author>
                    <author order="18">Carpenter EP</author>
                    <author ORCID="0000-0001-9291-4640" order="19">Sauer DB</author>
                    <title>Structure and function of the SIT1 proline transporter in complex with the COVID-19 receptor ACE2.</title>
                    <journal_abbreviation>Nat Commun</journal_abbreviation>
                    <country>UK</country>
                    <volume>15</volume>
                    <first_page>5503</first_page>
                    <last_page>5503</last_page>
                    <year>2024</year>
                    <external_references type="PUBMED">38951531</external_references>
                    <external_references type="DOI">doi:10.1038/s41467-024-48921-x</external_references>
                    <external_references type="ISSN">2041-1723</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>8p30</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>SIT1:ACE2 complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>SIT1:ACE2 complex</name>
                <parent>0</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="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.34</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Processed angiotensin-converting enzyme 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.09342557</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>MSSSSWLLLSLVAVTAADYKDDDDKSTIEEQAKTFLDKFNHEAEDLFYQSSLASWNYNTNITEENVQNMNNAGDKWSAFL
KEQSTLAQMYPLQEIQNLTVKLQLQALQQNGSSVLSEDKSKRLNTILNTMSTIYSTGKVCNPDNPQECLLLEPGLNEIMA
NSLDYNERLWAWESWRSEVGKQLRPLYEEYVVLKNEMARANHYEDYGDYWRGDYEVNGVDGYDYSRGQLIEDVEHTFEEI
KPLYEHLHAYVRAKLMNAYPSYISPIGCLPAHLLGDMWGRFWTNLYSLTVPFGQKPNIDVTDAMVDQAWDAQRIFKEAEK
FFVSVGLPNMTQGFWENSMLTDPGNVQKAVCHPTAWDLGKGDFRILMCTKVTMDDFLTAHHEMGHIQYDMAYAAQPFLLR
NGANEGFHEAVGEIMSLSAATPKHLKSIGLLSPDFQEDNETEINFLLKQALTIVGTLPFTYMLEKWRWMVFKGEIPKDQW
MKKWWEMKREIVGVVEPVPHDETYCDPASLFHVSNDYSFIRYYTRTLYQFQFQEALCQAAKHEGPLHKCDISNSTEAGQK
LFNMLRLGKSEPWTLALENVVGAKNMNVRPLLNYFEPLFTWLKDQNKNSFVGWSTDWSPYADQSIKVRISLKSALGDKAY
EWNDNEMYLFRSSVAYAMRQYFLKVKNQMILFGEEDVRVANLKPRISFNFFVTAPKNVSDIIPRTEVEKAIRMSRSRIND
AFRLNDNSLEFLGIQPTLGPPNQPPVSIWLIVFGVVMGVIVVGIVILIFTGIRDRKKKNKARSGENPYASIDISKGENNP
GFQNTDDVQTSF</string>
                    <external_references type="UNIPROTKB">Q9BYF1</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Sodium- and chloride-dependent transporter XTRP3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.071376258</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>MEKARPLWANSLQFVFACISYAVGLGNVWRFPYLCQMYGGGSFLVPYIIMLIVEGMPLLYLELAVGQRMRQGSIGAWRTI
SPYLSGVGVASVVVSFFLSMYYNVINAWAFWYLFHSFQDPLPWSVCPLNGNHTGYDEECEKASSTQYFWYRKTLNISPSL
QENGGVQWEPALCLLLAWLVVYLCILRGTESTGKVVYFTASLPYCVLIIYLIRGLTLHGATNGLMYMFTPKIEQLANPKA
WINAATQIFFSLGLGFGSLIAFASYNEPSNNCQKHAIIVSLINSFTSIFASIVTFSIYGFKATFNYENCLKKVSLLLTNT
FDLEDGFLTASNLEQVKGYLASAYPSKYSEMFPQIKNCSLESELDTAVQGTGLAFIVYTEAIKNMEVSQLWSVLYFFMLL
MLGIGSMLGNTAAILTPLTDSKIISSHLPKEAISGLVCLVNCAIGMVFTMEAGNYWFDIFNDYAATLSLLLIVLVETIAV
CYVYGLRRFESDLKAMTGRAVSWYWKVMWAGVSPLLIVSLFVFYLSDYILTGTLKYQAWDASQGQLVTKDYPAYALAVIG
LLVASSTMCIPLAALGTFVQRRLKRGDADPVAAENLYFQSHHHHHHHHHHGSAWSHPQFEKGGGSGGGSGGSAWSHPQFE
K</string>
                    <external_references type="UNIPROTKB">Q9NP91</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="5">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>ZN</formula>
            </ligand>
            <ligand macromolecule_id="6">
                <name>2-acetamido-2-deoxy-alpha-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>NDG</formula>
            </ligand>
            <ligand macromolecule_id="7">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>12</number_of_copies>
                <formula>NAG</formula>
            </ligand>
            <ligand macromolecule_id="8">
                <name>(2S)-piperidine-2-carboxylic acid</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000129157</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>YCP</formula>
            </ligand>
            <ligand macromolecule_id="9">
                <name>CHLORIDE ION</name>
                <molecular_weight>
                    <theoretical units="MDa">3.5453e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>CL</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">4</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">25.0</concentration>
                            <name>Tris</name>
                        </component>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="w/v">0.02</concentration>
                            <name>glyco-diosgenin (GDN)</name>
                        </component>
                        <component>
                            <concentration units="mM">10.0</concentration>
                            <name>pipecolic acid</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <mesh>200</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">30</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>grid blotted for 4sec after a 20sec wait time. </details>
                    </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">1.2</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.4</nominal_defocus_max>
                    <nominal_magnification>105000.0</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>
                    <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 BIOQUANTUM (6k x 4k)</film_or_detector_model>
                            <detector_mode>COUNTING</detector_mode>
                            <digitization_details>
                                <frames_per_image>1-50</frames_per_image>
                            </digitization_details>
                            <number_grids_imaged>1</number_grids_imaged>
                            <number_real_images>13194</number_real_images>
                            <average_exposure_time units="s">1.77</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">50.0</average_electron_dose_per_image>
                            <details>Images were collected in super-resolution mode EPU bin2</details>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <particle_selection>
                    <number_selected>808912</number_selected>
                    <details>particles from template and TOPAZ trained picking after initial 2D classification to remove junk</details>
                </particle_selection>
                <startup_model type_of_model="NONE">
                    <details>Ab initio</details>
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                <final_reconstruction>
                    <applied_symmetry>
                        <point_group>C2</point_group>
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                    <algorithm>FOURIER SPACE</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">3.29</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                        <software>
                            <name>cryoSPARC</name>
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                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
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                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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                        <software>
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                    <details>Masked local refinement</details>
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                </contour_list>
                <label>::::EMDATABANK.org::::EMD-17381::::</label>
                <annotation_details>half map2</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
