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            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
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        <key_dates>
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            <header_release>2026-02-25</header_release>
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            <update>2026-03-11</update>
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        <grant_support>
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                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of chicken ROS1 in apo-state. Cryo-EM refinement is focused on the "head" region of chicken ROS1.</title>
        <authors_list>
            <author>Bai XC</author>
            <author>Zhang XW</author>
        </authors_list>
        <keywords>ROS1, STRUCTURAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-1897-0318" order="1">An W</author>
                    <author ORCID="0000-0002-3634-6711" order="2">Zhang X</author>
                    <author ORCID="0000-0002-4234-5686" order="3">Bai XC</author>
                    <title>Structural insights into the activation of the chicken ROS1 receptor by the NEL/NICOL ligand complex.</title>
                    <journal_abbreviation>Nat Commun</journal_abbreviation>
                    <country>UK</country>
                    <year>2026</year>
                    <external_references type="PUBMED">41735298</external_references>
                    <external_references type="DOI">doi:10.1038/s41467-026-69942-8</external_references>
                    <external_references type="ISSN">2041-1723</external_references>
                </journal_citation>
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                <pdb_id>9oyz</pdb_id>
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                <db_name>EMDB</db_name>
                <accession_id>EMD-71042</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Cryo-EM structure of chicken ROS1 in apo-state. Cryo-EM refinement is focused on the "head" region of chicken ROS1.</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Chicken ROS1 receptor</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Chicken ROS1 receptor</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9031">Gallus gallus</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Tyrosine-protein kinase receptor</name>
                <natural_source database="NCBI">
                    <organism ncbi="9031">Gallus gallus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.26117479699999996</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>
                <sequence>
                    <string>MRNACLLLNRLGAFYFIWISAAYCSFSKNCQDLCTSNLEGELGIANLCNVSDINVACTQGCQFWNATEQVNCPLKCNKTY
TRECETVSCKFGCSRAEDAYGVEAQNCLNKPGAPFASSIGSHNITLGWKPANISEVKYIIQWKFHQLPGDWRYTEVVSET
SYTVKDLQAFTEYEFRVVWIITSQLQLHSPPSPSYRTHASGVPTTAPIIKDIQSSSPNTVEVSWFPPLFPNGLIVGYNLV
LTSENHELLRASRGHSFQFYSTFPNSTYRFSIVAVNEAGAGPPAEANITTPESKVKEKAKWLFLSRNQSLRKRYMEHFLE
AAHCLQNGIIHHNITGISVNVYQQVVYFSEGNSIWVKGVVDMSDVSDLTLFYTGWGNITSISVDWLYQRMYFVMNEKIHV
CQLENCTAAEDITPPYVTSPRKIVADPYNGYIFCLLEDGIYRANLPLFPDTASAASLVVKSHTLRDFMINFQSKRLIFFN
KTEQAFVSGFLDGSEFHTLRAHVPLDDMESFVYEDNIFTVTDGRAVFHEEISQVGSSSFNEYVVDCSLEYPEYFGFGNLL
FYAASTQPYPLPTLPRLVTVLFGSDQAVISWSPPEYTIGTSRSAWQNWTYDVKVSSQSTFEEEWVVSNITDTRFAVKNLV
SFTEYEMSVRAVSPAGEGPWSEPFRGMTFEEAEEEPYILAVGAEGLWKQRLDSYGPGEFLYPHIRNISDLDWYNDTLYWS
NSMGKVQTWSMNKKEGTTENSYVPDIKNARMLAFDWLGQCLYWAGKANTIYRKSLLGDHMDVVAHVVYVVKDLAVDSVNG
YLYWATTYTVESARLNGEEYLILQEHLQFSGKQVVGLALDLTSGFLYWLVQDGLCLNLYRISICKESCGNIMVTEISAWS
VSEVSQNALQYYSGRLFWINRLKFITTQELNQSISIPFSEPAEFAAFTLVHTSLKPLPGNFSFTPKVIPSSVPESSFKIK
GNSSSFHIIWNASTDVQWGTVFYCVGSNALQMRTLESERCLHPHDLTVPSYKVDWLEPFTLFDFSVTPYTYWGKAPTTSV
YLRAPEGVPSAPANPRIYVLHSNTHEGEEKVLVELRWDKPERDNGVLTQFRVYYQLLYESGAADTLMEWNVSDVKPTALL
FSIRDVHPRLTVRFQVQAFTSVGPGPMSDVAQRNSSDIFPVPTLITFSSNKLFLTDIDSNHTIWEVLTNRNIKDICYTAD
DDKVYYILEDSLFLLNVQSTSESQLFEDVFLRNVTAITVDWIARHLFVAMKTSWNETQVFFIDLELKTKSLKALNIQLGK
RNSTISSLLSYPFLSRLYWIEELDYGSRMFYYDILNNTMYHILGYESVEEKMRNYCNCNVAEAELGRPISIDVTDIKKPQ
LLFIRGRDEIWASDVDGCHCWRITKIPSFQGTKIGSLTVDKQFIYWTIEKKEYTEICLADKESTRHSLQRKANHELKILA
YSSAMQSYPDKKCLTPLLDTEKPTILDTTNTSFTLSLPSVTTQQLCPSISQPTPTYLVFFREITSNHENSTYHFSTLLQK
TLEIQEPIAVINNLKPFSSYAIQVAVKNYYSNQNQLAVGRETISTTLYGVPEGVDSIKTVVLSDTTINISWSEPLEPNGP
LESIRYQISVNLLSLFPEAPLRKSEFPNGTLSWSVSDLQSGTNNLFKVLAFHPNENWFSESVPVIAKTFETPLSPSNIIP
RNTSFQLEWRAPLHINGTSFWFELRKWQTRSDWFSPASTTCTVGPVYTCNLTGTLPSANYLVRATVVYVTGMKSTSSPTS
FKTTAGVPSKPGTPKRAEDSKNSVQWEKAEDNGSNLTYYILESRKQSGNTNKVKSLWVVVYNGSCDSICTWKAENLEGTF
QFRAAAANMLGLGEYSDTSKDIVLAKDTVTSPDITAIVAVIGAVVLGLTIIILFGFVWHQRWKSRKPASTGQIVLVKEDK
ELAQLRGMAETVGLANACYAVSTLPSQAEIESLPAFPRDKLNLHKLLGSGAFGEVYEGTALDILADGSGESRVAVKTLKR
GATDQEKSEFLKEAHLMSKFDHPHILKLLGVCLLNEPQYLILELMEGGDLLSYLRGARKQKFQSPLLTLTDLLDICLDIC
KGCVYLEKMRFIHRDLAARNCLVSEKQYGSCSRVVKIGDFGLARDIYKNDYYRKRGEGLLPVRWMAPESLIDGVFTNHSD
VWAFGVLVWETLTLGQQPYPGLSNIEVLHHVRSGGRLESPNNCPDDIRDLMTRCWAQDPHNRPTFFYIQHKLQEIRHSPL
CFSYFLGDKESVAGFINQAFEDIDVPPADSDSILSTTLMEARDQEGLNYLVVVKESNQDQGSISSAELTSV</string>
                    <external_references type="UNIPROTKB">F1NQL9</external_references>
                </sequence>
                <ec_number>2.7.10.1</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="3">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>13</number_of_copies>
                <formula>NAG</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">8</concentration>
                    <buffer>
                        <ph>7.5</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>GOLD</material>
                        <mesh>300</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                        </pretreatment>
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                    <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">1.2</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.2</nominal_defocus_max>
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                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">20</slit_width>
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                        </image_recording>
                    </image_recording_list>
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            </microscopy_list>
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                    <details>Made by RELION</details>
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