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    <admin>
        <current_status>
            <date>2024-11-13</date>
            <code>REL</code>
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        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2022-02-07</deposition>
            <header_release>2022-09-21</header_release>
            <map_release>2022-09-21</map_release>
            <update>2024-11-13</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01GM137421</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>U24GM129547</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>American Heart Association</funding_body>
                <code>20PRE35210058</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of the human reduced folate carrier in complex with methotrexate</title>
        <authors_list>
            <author>Wright NJ</author>
            <author>Fedor JG</author>
            <author>Lee S-Y</author>
        </authors_list>
        <keywords>transporter, reduced folate carrier, SLC19A1, TRANSPORT PROTEIN, anion exchanger</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Wright NJ</author>
                    <author order="2">Fedor JG</author>
                    <author order="3">Zhang H</author>
                    <author order="4">Jeong P</author>
                    <author order="5">Suo Y</author>
                    <author order="6">Yoo J</author>
                    <author order="7">Hong J</author>
                    <author order="8">Im W</author>
                    <author order="9">Lee SY</author>
                    <title>Methotrexate recognition by the human reduced folate carrier SLC19A1.</title>
                    <journal_abbreviation>Nature</journal_abbreviation>
                    <country>UK</country>
                    <volume>609</volume>
                    <first_page>1056</first_page>
                    <last_page>1062</last_page>
                    <year>2022</year>
                    <external_references type="PUBMED">36071163</external_references>
                    <external_references type="DOI">doi:10.1038/s41586-022-05168-0</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>
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                    <other>other EM volume</other>
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        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7tx6</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
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    </crossreferences>
    <sample>
        <name>Human reduced folate carrier SLC19A1</name>
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                <name>Human reduced folate carrier SLC19A1</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Covalently modified Lys411 with methotrexate</details>
                <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>Reduced folate transporter,Soluble cytochrome b562</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.074797195</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>
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                    <string>MVPSSPAVEKQVPVEPGPDPELRSWRHLVCYLCFYGFMAQIRPGESFITPYLLGPDKNFTREQVTNEITPVLSYSYLAVL
VPVFLLTDYLRYTPVLLLQGLSFVSVWLLLLLGHSVAHMQLMELFYSVTMAARIAYSSYIFSLVRPARYQRVAGYSRAAV
LLGVFTSSVLGQLLVTVGRVSFSTLNYISLAFLTFSVVLALFLKRPKRSLFFNRDLEDNWETLNDNLKVIEKADNAAQVK
DALTKMRAAALDAQKATPPKLEDKSPDSPEMKDFRHGFDILVGQIDDALKLANEGKVKEAQAAAEQLKTTRNAYIQKYLL
RVACGDSVLARMLRELGDSLRRPQLRLWSLWWVFNSAGYYLVVYYVHILWNEVDPTTNSARVYNGAADAASTLLGAITSF
AAGFVKIRWARWSKLLIAGVTATQAGLVFLLAHTRHPSSIWLCYAAFVLFRGSYQFLVPIATFQIASSLSKELCALVFGV
NTFFATIVKTIITFIVSDVRGLGLPVRKQFQLYSVYFLILSIIYFLGAMLDGLRHCQRGHHPRQPPAQGLRSAAEEKAAQ
ALSVQDKGLGGLQPAQSPPLSPEDSLGAVGPASLEQRQSDPYLAQAPAPQAAEFLSPVTTPSPCTLCSAQASGPEAADET
CPQLAVHPPGVSKLGLQCLPSDGVQNVNQANSLEVLFQ</string>
                    <external_references type="UNIPROTKB">P41440</external_references>
                    <external_references type="UNIPROTKB">P0ABE7</external_references>
                    <external_references type="UNIPROTKB">P41440</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>METHOTREXATE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000454439</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>MTX</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>Digitonin</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0012293119999999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>AJP</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
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                    <buffer>
                        <ph>8.0</ph>
                    </buffer>
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                        <model>UltrAuFoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <mesh>300</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">200</time>
                            <atmosphere>AIR</atmosphere>
                            <pressure units="kPa">0.00039000000000000005</pressure>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">85</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>LEICA EM GP</instrument>
                    </vitrification>
                </single_particle_preparation>
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                    <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>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">1.8</nominal_defocus_max>
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                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
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                                    <width units="pixel">5760</width>
                                    <height units="pixel">4092</height>
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                            <number_real_images>25507</number_real_images>
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                            <average_electron_dose_per_image units="e/Å^2">60.0</average_electron_dose_per_image>
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