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        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
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        <key_dates>
            <deposition>2024-07-23</deposition>
            <header_release>2025-04-23</header_release>
            <map_release>2025-04-23</map_release>
            <update>2025-05-21</update>
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                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>R01GM155152</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>The Ectodomains of SPRING and S1P with the inhibitor PF-429242</title>
        <authors_list>
            <author>Kober DL</author>
        </authors_list>
        <keywords>protease, complex, inhibitor, MEMBRANE PROTEIN, MEMBRANE PROTEIN-INHIBITOR complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0009-0005-0189-4151" order="1">Bullington AV</author>
                    <author ORCID="0009-0008-2438-1828" order="2">Micallo I</author>
                    <author ORCID="0009-0005-1965-4797" order="3">Bajaj B</author>
                    <author ORCID="0000-0002-7025-5530" order="4">Kumar P</author>
                    <author ORCID="0009-0000-4098-2334" order="5">Schlamowitz N</author>
                    <author ORCID="0009-0001-9758-3454" order="6">Silva A</author>
                    <author ORCID="0000-0003-2055-9883" order="7">Hendrix S</author>
                    <author ORCID="0000-0001-6935-7532" order="8">Zelcer N</author>
                    <author ORCID="0000-0001-8657-9348" order="9">Kober DL</author>
                    <title>Structural basis for substrate selectivity by site-one protease revealed by studies with a small-molecule inhibitor.</title>
                    <journal_abbreviation>Proc.Natl.Acad.Sci.USA</journal_abbreviation>
                    <country>US</country>
                    <volume>122</volume>
                    <first_page>e2426931122</first_page>
                    <last_page>e2426931122</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">40299693</external_references>
                    <external_references type="DOI">doi:10.1073/pnas.2426931122</external_references>
                    <external_references type="ISSN">1091-6490</external_references>
                    <external_references type="CSD">0040</external_references>
                    <external_references type="ASTM">PNASA6</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>9csd</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Complex of the ectodomains of S1P and SPRING in the presence of the small molecule PF-429242</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Complex of the ectodomains of S1P and SPRING in the presence of the small molecule PF-429242</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">0.12</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Membrane-bound transcription factor site-1 protease</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.11504820299999999</theoretical>
                </molecular_weight>
                <details>Construct contains 1-998 of human site one protease followed by a 3xFLAG affinity tag</details>
                <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>MKLVNIWLLLLVVLLCGKKHLGDRLEKKSFEKAPCPGCSHLTLKVEFSSTVVEYEYIVAFNGYFTAKARNSFISSALKSS
EVDNWRIIPRNNPSSDYPSDFEVIQIKEKQKAGLLTLEDHPNIKRVTPQRKVFRSLKYAESDPTVPCNETRWSQKWQSSR
PLRRASLSLGSGFWHATGRHSSRRLLRAIPRQVAQTLQADVLWQMGYTGANVRVAVFDTGLSEKHPHFKNVKERTNWTNE
RTLDDGLGHGTFVAGVIASMRECQGFAPDAELHIFRVFTNNQVSYTSWFLDAFNYAILKKIDVLNLSIGGPDFMDHPFVD
KVWELTANNVIMVSAIGNDGPLYGTLNNPADQMDVIGVGGIDFEDNIARFSSRGMTTWELPGGYGRMKPDIVTYGAGVRG
SGVKGGCRALSGTSVASPVVAGAVTLLVSTVQKRELVNPASMKQALIASARRLPGVNMFEQGHGKLDLLRAYQILNSYKP
QASLSPSYIDLTECPYMWPYCSQPIYYGGMPTVVNVTILNGMGVTGRIVDKPDWQPYLPQNGDNIEVAFSYSSVLWPWSG
YLAISISVTKKAASWEGIAQGHVMITVASPAETESKNGAEQTSTVKLPIKVKIIPTPPRSKRVLWDQYHNLRYPPGYFPR
DNLRMKNDPLDWNGDHIHTNFRDMYQHLRSMGYFVEVLGAPFTCFDASQYGTLLMVDSEEEYFPEEIAKLRRDVDNGLSL
VIFSDWYNTSVMRKVKFYDENTRQWWMPDTGGANIPALNELLSVWNMGFSDGLYEGEFTLANHDMYYASGCSIAKFPEDG
VVITQTFKDQGLEVLKQETAVVENVPILGLYQIPAEGGGRIVLYGDSNCLDDSHRQKDCFWLLDALLQYTSYGVTPPSLS
HSGNRQRPPSGAGSVTPERMEGNHLHRYSKVLEAHLGDPKPRPLPACPRLSWAKPQPLNETAPSNLWKHQKLLSIDLDKV
VLPNFRSNRPQVRPLSPGESGAWDIPGGIMPGRYNQEVDYKDDDDKGSDYKDDDDKGSDYKDDDDK</string>
                    <external_references type="UNIPROTKB">Q14703</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>SREBP regulating gene protein</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.023200291</theoretical>
                </molecular_weight>
                <details>Construct contains an IgK leader peptide followed by human SPRING residues 35-205 followed by a 10-His tag</details>
                <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>METDTLLLWVLLLWVPGSTGDKQEERAVRDRNLLQVHDHNQPIPWKVQFNLGNSSRPSNQCRNSIQGKHLITDELGYVCE
RKDLLVNGCCNVNVPSTKQYCCDGCWPNGCCSAYEYCVSCCLQPNKQLLLERFLNRAAVAFQNLFMAVEDHFELCLAKCR
TSSQSVQHENTYRDPIAKYCYGESPPELFPAHHHHHHHHHH</string>
                    <external_references type="UNIPROTKB">Q9H741</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="4">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>NAG</formula>
            </ligand>
            <ligand macromolecule_id="5">
                <name>4-[(diethylamino)methyl]-N-[2-(2-methoxyphenyl)ethyl]-N-[(3R)-pyrrolidin-3-yl]benzamide</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000409564</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>A1AZU</formula>
            </ligand>
            <ligand macromolecule_id="6">
                <name>CALCIUM ION</name>
                <molecular_weight>
                    <theoretical units="MDa">4.0078e-05</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>CA</formula>
            </ligand>
            <ligand macromolecule_id="7">
                <name>water</name>
                <molecular_weight>
                    <theoretical units="MDa">1.8015e-05</theoretical>
                </molecular_weight>
                <number_of_copies>42</number_of_copies>
                <formula>HOH</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">0.5</concentration>
                    <buffer>
                        <ph>7.5</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <mesh>400</mesh>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                        </support_film>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">80</time>
                            <atmosphere>AIR</atmosphere>
                            <pressure units="kPa">0.03</pressure>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>TFS 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>
                    <nominal_defocus_min units="µm">1.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.0</nominal_defocus_max>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>FEI FALCON III (4k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">64.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
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            </microscopy_list>
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                <image_recording_id>1</image_recording_id>
                <ctf_correction>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="INSILICO MODEL"/>
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                    <resolution units="Å" res_type="BY AUTHOR">2.4</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                        <software>
                            <name>cryoSPARC</name>
                            <version>4.4</version>
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                    </software_list>
                    <number_images_used>122723</number_images_used>
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                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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                        <software>
                            <name>cryoSPARC</name>
                            <version>4.4</version>
                        </software>
                    </software_list>
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        <label>::::EMDATABANK.org::::EMD-45892::::</label>
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                <annotation_details>deepemhancer map of SPRING/S1P/PF-429242 for model building and illustrations</annotation_details>
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