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            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
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        <key_dates>
            <deposition>2025-05-19</deposition>
            <header_release>2026-07-29</header_release>
            <map_release>2026-07-29</map_release>
            <update>2026-08-19</update>
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        <grant_support>
            <grant_reference>
                <funding_body>Other private</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>cryoEM structure of IRAK4:KT-474:CRBN-DDB1 ternary complex</title>
        <authors_list>
            <author>Fei X</author>
            <author>Ramanathan A</author>
            <author>Diagle C</author>
            <author>Ford M</author>
            <author>Campbell V</author>
            <author>Zheng X</author>
            <author>Li H</author>
            <author>Sintchak M</author>
            <author>Kamadurai H</author>
            <author>Miller R</author>
            <author>Kazmirski S</author>
            <author>Huang X</author>
            <author>Weiss M</author>
            <author>Manolfi N</author>
            <author>Zhu X</author>
        </authors_list>
        <keywords>Kinase, E3 ligase, IRAK4, CRBN, DDB1, heterobifunctional degrader, Transferase-DNA-Binding Protein complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Fei X</author>
                    <author order="2">Ramanathan A</author>
                    <author order="3">Daigle CA</author>
                    <author order="4">Ford M</author>
                    <author order="5">Campbell V</author>
                    <author order="6">Zheng X</author>
                    <author order="7">Sintchak M</author>
                    <author order="8">Li H</author>
                    <author order="9">Kamadurai H</author>
                    <author order="10">Miller R</author>
                    <author order="11">Kazmirski S</author>
                    <author order="12">Huang X</author>
                    <author order="13">Weiss MM</author>
                    <author order="14">Mainolfi N</author>
                    <author order="15">Zhu X</author>
                    <title>Structural basis for selective and potent degradation of IRAK4 by KT-474.</title>
                    <journal_abbreviation>Nat Commun</journal_abbreviation>
                    <country>UK</country>
                    <volume>17</volume>
                    <year>2026</year>
                    <external_references type="PUBMED">42336816</external_references>
                    <external_references type="DOI">doi:10.1038/s41467-026-74105-w</external_references>
                    <external_references type="ISSN">2041-1723</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
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                <pdb_id>9opj</pdb_id>
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                    <in_frame>FULLOVERLAP</in_frame>
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                <details>cryoEM structure of IRAK4:KT-474:CRBN-DDB1 ternary complex</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>IRAK4:KT-474:CRBN-DDB1 ternary complex</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>IRAK4:KT-474:CRBN-DDB1 ternary complex</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_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>DNA damage-binding protein 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.12813957799999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7108">Spodoptera frugiperda</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MSYNYVVTAQKPTAVNGCVTGHFTSAEDLNLLIAKNTRLEIYVVTAEGLRPVKEVGMYGKIAVMELFRPKGESKDLLFIL
TAKYNACILEYKQSGESIDIITRAHGNVQDRIGRPSETGIIGIIDPECRMIGLRLYDGLFKVIPLDRDNKELKAFNIRLE
ELHVIDVKFLYGCQAPTICFVYQDPQGRHVKTYEVSLREKEFNKGPWKQENVEAEASMVIAVPEPFGGAIIIGQESITYH
NGDKYLAIAPPIIKQSTIVCHNRVDPNGSRYLLGDMEGRLFMLLLEKEEQMDGTVTLKDLRVELLGETSIAECLTYLDNG
VVFVGSRLGDSQLVKLNVDSNEQGSYVVAMETFTNLGPIVDMCVVDLERQGQGQLVTCSGAFKEGSLRIIRNGIGIHEHA
SIDLPGIKGLWPLRSDPNRETDDTLVLSFVGQTRVLMLNGEEVEETELMGFVDDQQTFFCGNVAHQQLIQITSASVRLVS
QEPKALVSEWKEPQAKNISVASCNSSQVVVAVGRALYYLQIHPQELRQISHTEMEHEVACLDITPLGDSNGLSPLCAIGL
WTDISARILKLPSFELLHKEMLGGEIIPRSILMTTFESSHYLLCALGDGALFYFGLNIETGLLSDRKKVTLGTQPTVLRT
FRSLSTTNVFACSDRPTVIYSSNHKLVFSNVNLKEVNYMCPLNSDGYPDSLALANNSTLTIGTIDEIQKLHIRTVPLYES
PRKICYQEVSQCFGVLSSRIEVQDTSGGTTALRPSASTQALSSSVSSSKLFSSSTAPHETSFGEEVEVHNLLIIDQHTFE
VLHAHQFLQNEYALSLVSCKLGKDPNTYFIVGTAMVYPEEAEPKQGRIVVFQYSDGKLQTVAEKEVKGAVYSMVEFNGKL
LASINSTVRLYEWTTEKELRTECNHYNNIMALYLKTKGDFILVGDLMRSVLLLAYKPMEGNFEEIARDFNPNWMSAVEIL
DDDNFLGAENAFNLFVCQKDSAATTDEERQHLQEVGLFHLGEFVNVFCHGSLVMQNLGETSTPTQGSVLFGTVNGMIGLV
TSLSESWYNLLLDMQNRLNKVIKSVGKIEHSFWRSFHTERKTEPATGFIDGDLIESFLDISRPKMQEVVANLQYDDGSGM
KREATADDLIKVVEELTRIHWSHPQFEK</string>
                    <external_references type="UNIPROTKB">Q16531</external_references>
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            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Protein cereblon</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
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                    <theoretical units="MDa">0.046465374999999996</theoretical>
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                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7108">Spodoptera frugiperda</recombinant_organism>
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                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>GSEAKKPNIINFDTSLPTSHTYLGADMEEFHGRTLHDDDSCQVIPVLPQVMMILIPGQTLPLQLFHPQEVSMVRNLIQKD
RTFAVLAYSNVQEREAQFGTTAEIYAYREEQDFGIEIVKVKAIGRQRFKVLELRTQSDGIQQAKVQILPECVLPSTMSAV
QLESLNKCQIFPSKPVSREDQCSYKWWQKYQKRKFHCANLTSWPRWLYSLYDAETLMDRIKKQLREWDENLKDDSLPSNP
IDFSYRVAACLPIDDVLRIQLLKIGSAIQRLRCELDIMNKCTSLCCKQCQETEITTKNEIFSLSLCGPMAAYVNPHGYVH
ETLTVYKACNLNLIGRPSTEHSWFPGYAWTVAQCKICASHIGWKFTATKKDMSPQKFWGLTRSALLPTIPDTEDEISPDK
VILCL</string>
                    <external_references type="UNIPROTKB">Q96SW2</external_references>
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            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Interleukin-1 receptor-associated kinase 4</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
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                <molecular_weight>
                    <theoretical units="MDa">0.051676633</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="7108">Spodoptera frugiperda</recombinant_organism>
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                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SMNKPITPSTYVRCLNVGLIRKLSDFIDPQEGWKKLAVAIKKPSGDDRYNQFHIRRFEALLQTGKSPTSELLFDWGTTNC
TVGDLVDLLIQNEFFAPASLLLPDAVPKTANTLPSKEAITVQQKQMPFCDKDRTLMTPVQNLEQSYMPPDSSSPENKSLE
VSDTRFHSFSFYELKNVTNNFDERPISVGGNKMGEGGFGVVYKGYVNNTTVAVKKLAAMVDITTEELKQQFDQEIKVMAK
CQHENLVELLGFSSDGDDLCLVYVYMPNGSLLDRLSCLDGTPPLSWHMRCKIAQGAANGINFLHENHHIHRDIKSANILL
DEAFTAKISDFGLARASEKFAQTVMTSRIVGTTAYMAPEALRGEITPKSDIYSFGVVLLEIITGLPAVDEHREPQLLLDI
KEEIEDEEKTIEDYIDKKMNDADSTSVEAMYSVASQCLHEKKNKRPDIKKVQQLLQEMTAS</string>
                    <external_references type="UNIPROTKB">Q9NWZ3</external_references>
                </sequence>
                <ec_number>2.7.11.1</ec_number>
            </protein_or_peptide>
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                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>ZN</formula>
            </ligand>
            <ligand macromolecule_id="5">
                <name>(8R)-N-{3-(difluoromethyl)-1-[(1S,4R)-4-({4-[(3-{1-[(3S)-2,6-dioxopiperidin-3-yl]-3-methyl-2-oxo-2,3-dihydro-1H-1,3-benzimidazol-4-yl}prop-2-yn-1-yl)oxy]piperidin-1-yl}methyl)cyclohexyl]-1H-pyrazol-4-yl}-5-[(1R,4R)-2-oxa-5-azabicyclo[2.2.1]heptan-5-yl]pyrazolo[1,5-a]pyrimidine-3-carboxamide</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000865927</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <formula>A1CDC</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                    <buffer>
                        <ph>7.5</ph>
                    </buffer>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
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                    <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">0.8</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>GATAN K3 BIOQUANTUM (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">48.0</average_electron_dose_per_image>
                        </image_recording>
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                <image_recording_id>1</image_recording_id>
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                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
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                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.2</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>200067</number_images_used>
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                    <type>RANDOM ASSIGNMENT</type>
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                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
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