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        <current_status>
            <date>2026-02-18</date>
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        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2025-04-09</deposition>
            <header_release>2026-02-18</header_release>
            <map_release>2026-02-18</map_release>
            <update>2026-02-18</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Swedish Research Council</funding_body>
                <code>2024-04107</code>
                <country>Sweden</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Other government</funding_body>
                <code>HORIZON-MSCA-2023-DN-01 action (project: TargetRNA, n. 101168667)</code>
            </grant_reference>
            <grant_reference>
                <funding_body>Agence Nationale de la Recherche (ANR)</funding_body>
                <code>ANR-10-INBS-0005-02</code>
                <country>France</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Agence Nationale de la Recherche (ANR)</funding_body>
                <code>ANR-17-EURE-0003</code>
                <country>France</country>
            </grant_reference>
        </grant_support>
        <title>Structure of Oceanobacillus iheyensis group II intron domains D1-D6</title>
        <authors_list>
            <author>Jadhav SS</author>
            <author>Nigro M</author>
            <author>Marcia M</author>
        </authors_list>
        <keywords>Protein-free RNA cryo-EM, Ribozyme, Metalloenzymes, Splicing, RNA</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-6935-518X" order="1">Kretsch RC</author>
                    <author order="2">Albrecht R</author>
                    <author ORCID="0000-0002-6236-8164" order="3">Andersen ES</author>
                    <author ORCID="0000-0002-0586-0742" order="4">Chen HA</author>
                    <author ORCID="0000-0002-8910-3078" order="5">Chiu W</author>
                    <author ORCID="0000-0001-7497-0972" order="6">Das R</author>
                    <author ORCID="0000-0003-3664-6199" order="7">Gezelle JG</author>
                    <author ORCID="0000-0001-6937-5677" order="8">Hartmann MD</author>
                    <author ORCID="0000-0002-4548-2299" order="9">Hobartner C</author>
                    <author ORCID="0000-0002-6965-8965" order="10">Hu Y</author>
                    <author ORCID="0009-0009-4682-7568" order="11">Jadhav S</author>
                    <author ORCID="0000-0002-5573-4891" order="12">Johnson PE</author>
                    <author ORCID="0000-0001-7780-5278" order="13">Jones CP</author>
                    <author ORCID="0000-0001-6424-3173" order="14">Koirala D</author>
                    <author ORCID="0000-0001-8965-8201" order="15">Kristoffersen EL</author>
                    <author ORCID="0000-0002-6140-9788" order="16">Largy E</author>
                    <author ORCID="0000-0002-9578-2628" order="17">Lewicka A</author>
                    <author ORCID="0000-0002-0776-7947" order="18">Mackereth CD</author>
                    <author ORCID="0000-0003-2430-0713" order="19">Marcia M</author>
                    <author ORCID="0000-0003-1847-475X" order="20">Nigro M</author>
                    <author ORCID="0009-0001-3907-431X" order="21">Ojha M</author>
                    <author ORCID="0000-0002-0541-6270" order="22">Piccirilli JA</author>
                    <author ORCID="0000-0002-3467-341X" order="23">Rice PA</author>
                    <author ORCID="0000-0001-9656-6639" order="24">Shin H</author>
                    <author ORCID="0000-0001-7988-9946" order="25">Steckelberg AL</author>
                    <author ORCID="0000-0002-9279-1721" order="26">Su Z</author>
                    <author ORCID="0000-0001-9091-9851" order="27">Srivastava Y</author>
                    <author ORCID="0000-0003-1243-9654" order="28">Wang L</author>
                    <author ORCID="0009-0000-6122-2457" order="29">Wu Y</author>
                    <author ORCID="0000-0002-4632-2959" order="30">Xie J</author>
                    <author ORCID="0009-0007-4155-2468" order="31">Zwergius NH</author>
                    <author ORCID="0000-0002-3012-2282" order="32">Moult J</author>
                    <author ORCID="0000-0001-5066-7178" order="33">Kryshtafovych A</author>
                    <title>Functional Relevance of CASP16 Nucleic Acid Predictions as Evaluated by Structure Providers.</title>
                    <journal_abbreviation>Proteins</journal_abbreviation>
                    <country>US</country>
                    <volume>94</volume>
                    <first_page>51</first_page>
                    <last_page>78</last_page>
                    <year>2026</year>
                    <external_references type="PUBMED">40905273</external_references>
                    <external_references type="DOI">doi:10.1002/prot.70043</external_references>
                    <external_references type="ISSN">1097-0134</external_references>
                    <external_references type="CSD">0867</external_references>
                    <external_references type="ASTM">PSFGEY</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>9qtj</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
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                <db_name>EMDB</db_name>
                <accession_id>EMD-53353</accession_id>
                <content_type>associated EM volume</content_type>
                <details>Structure of Oceanobacillus iheyensis group II intron domains D1-D6</details>
            </db_reference>
        </other_db_list>
    </crossreferences>
    <sample>
        <name>Group IIC Intron</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Group IIC Intron</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="182710">Oceanobacillus iheyensis</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.156</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <rna macromolecule_id="1">
                <name>RNA (461-MER)</name>
                <natural_source database="NCBI">
                    <organism ncbi="182710">Oceanobacillus iheyensis</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.155816406</theoretical>
                </molecular_weight>
                <details>Group IIC intron</details>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>GUGUGCCCGGCAUGGGUGCAGUCUAUAGGGUGAGAGUCCCGAACUGUGAAGGCAGAAGUAACAGUUAGCCUAACGCAAGG
GUGUCCGUGGCGACAUGGAAUCUGAAGGAAGCGGACGGCAAACCUUCGGUCUGAGGAACACGAACUUCAUAUGAGGCUAG
GUAUCAAUGGAUGAGUUUGCAUAACAAAACAAAGUCCUUUCUGCCAAAGUUGGUACAGAGUAAAUGAAGCAGAUUGAUGA
AGGGAAAGACUGCAUUCUUACCCGGGGAGGUCUGAUCGAAACGCCAAGCACUCUUGGUAACCCAUUCAGCAAUGGAUGGC
UGAACGGUCAGAAGUCAGCAGAAGUCAUAGUACCCUGCAUACUCGAGAAUGUAAGGGGAAGGACGGAACAAUUAAGUUCG
CUUAAUUGAACCGCCGUAUACCGAACGGUACGUACGGUGGUGUGAGAGGACGGGGGUUAGUCGCUCCCUUCUACUCUAUU
A</string>
                </sequence>
            </rna>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                        <ph>6.5</ph>
                        <details>10 mM MgCl2, 150 mM KCl, 5 mM Na-MES pH 6.5</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>300</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>
                            <pressure units="kPa">0.00045000000000000004</pressure>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">295.15</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                    </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">0.8</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.4</nominal_defocus_max>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K3 (6k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">36.0</average_electron_dose_per_image>
                        </image_recording>
                    </image_recording_list>
                </single_particle_microscopy>
            </microscopy_list>
            <singleparticle_processing image_processing_id="1">
                <image_recording_id>1</image_recording_id>
                <ctf_correction>
                    <type>PHASE FLIPPING AND AMPLITUDE CORRECTION</type>
                </ctf_correction>
                <startup_model type_of_model="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>4FAQ</pdb_id>
                    </pdb_model>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.79</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                        </software>
                    </software_list>
                    <number_images_used>71128</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
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        <label>::::EMDATABANK.org::::EMD-53353::::</label>
        <annotation_details>Wilt type full length self-splicing group IIC intron from Oceanobacillus iheyensis</annotation_details>
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