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        <sites>
            <deposition>PDBe</deposition>
            <last_processing>PDBe</last_processing>
        </sites>
        <key_dates>
            <deposition>2022-02-04</deposition>
            <header_release>2023-08-16</header_release>
            <map_release>2023-08-16</map_release>
            <update>2025-07-02</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>GM118117</code>
                <country>United States</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Swiss National Science Foundation</funding_body>
                <code>(NCCR) TransCure</code>
                <country>Switzerland</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)</funding_body>
                <code>GM118160</code>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>elongated Cascade complex from type I-A CRISPR-Cas system</title>
        <authors_list>
            <author>Hu C</author>
            <author>Ni D</author>
        </authors_list>
        <keywords>elongated Cascade complex, cascade, type I-A, genome editing, ANTIVIRAL PROTEIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="false">
                    <author ORCID="0000-0002-3193-6077" order="1">Ni D</author>
                    <author ORCID="0000-0003-4509-4840" order="2">Hu C</author>
                    <author ORCID="0000-0003-3268-354X" order="3">Nam KH</author>
                    <author order="4">Terns M</author>
                    <author ORCID="0000-0002-1185-4592" order="5">Stahlberg H</author>
                    <author ORCID="0000-0001-5957-7822" order="6">Ke A</author>
                    <title>Structural snapshots for an atypic type I CRISPR-Cas system</title>
                    <journal_abbreviation>To Be Published</journal_abbreviation>
                    <external_references type="CSD">0353</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7r21</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>elongated Cascade complex from Pyrococcus furiosus type I-A CRISPR/Cas system</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>elongated Cascade complex from Pyrococcus furiosus type I-A CRISPR/Cas system</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>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Cascade alone</details>
                <molecular_weight>
                    <theoretical units="MDa">0.55</theoretical>
                </molecular_weight>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>Cas11a, Cas7a and Type I-A CRISPR-associated protein Cas5</name>
                <parent>1</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="186497">Pyrococcus furiosus DSM 3638</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="3">
                <name>CrRNA (62-MER)</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>4</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="562">Escherichia coli</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Cas11a</name>
                <natural_source database="NCBI">
                    <organism ncbi="186497">Pyrococcus furiosus DSM 3638</organism>
                    <strain>ATCC 43587 / DSM 3638 / JCM 8422 / Vc1</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.012208933</theoretical>
                </molecular_weight>
                <number_of_copies>7</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>GGWIRNIGRYLSYLVDDTFEEYAYDVVDGIAKARTQEELLEGVYKALRLAPKLKKKAESKGCPPPRIPSPEDIEALEEKV
EQLSNPKDLRKLAVSLALWAFASWNNCP</string>
                    <external_references type="UNIPROTKB">Q8U332</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Cas7a</name>
                <natural_source database="NCBI">
                    <organism ncbi="186497">Pyrococcus furiosus DSM 3638</organism>
                    <strain>ATCC 43587 / DSM 3638 / JCM 8422 / Vc1</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.036989148</theoretical>
                </molecular_weight>
                <number_of_copies>10</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MYVRISGRIRLNAHSLNAQGGGGTNYIEITKTKVTVRTENGWTVVEVPAITGNMLKHWHFVGFVDYFKTTPYGVNLTERA
LRYNGTRFGQGETTATKANGATVQLNDEATIIKELADADVHGFLAPKTGRRRVSLVKASFILPTEDFIKEVEGERLITAI
KHNRVDVDEKGAIGSSKEGTAQMLFSREYATGLYGFSIVLDLGLVGIPQGLPVKFEENQPRPNIVIDPNERKARIESALK
ALIPMLSGYIGANLARSFPVFKVEELVAIASEGPIPALVHGFYEDYIEANRSIIKNARALGFNIEVFTYNVDLGEDIEAT
KVSSVEELVANLVKMV</string>
                    <external_references type="UNIPROTKB">Q8U333</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Type I-A CRISPR-associated protein Cas5</name>
                <natural_source database="NCBI">
                    <organism ncbi="186497">Pyrococcus furiosus DSM 3638</organism>
                    <strain>ATCC 43587 / DSM 3638 / JCM 8422 / Vc1</strain>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.029147219</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MDILLVCLRFPFFSVAKRSYQVRTSFLLPPPSALKGALAKGLILLKPEKYASSSLDEAALKAIKEIESKLVDIKAVSVAP
LSPLIRNAFLLKRLRNLESGSNAEKSDAMRREYTFTRELLVAYIFKNLTQEEKNLYLKAAMLIDVIGDTESLATPVWASF
VKPEDKKAPLAFSAPYTEIYSLLSSKIQAKGKIRMYIEKMRVSPEYSKTKGPQEEIFYLPIEERRYKRIVYYARIYPPEV
EKALTVDGEVLGIWIP</string>
                    <external_references type="UNIPROTKB">A0A5C0XNV9</external_references>
                </sequence>
            </protein_or_peptide>
            <rna macromolecule_id="4">
                <name>CrRNA (62-MER)</name>
                <natural_source database="NCBI">
                    <organism ncbi="562">Escherichia coli</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.01997984</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>AUUGAAAGUUGUAGUAUGCGGUCCUUGCGGCUGAGAGCACUUCAGGAGUUGCCCGCGCCAGC</string>
                </sequence>
            </rna>
        </macromolecule_list>
    </sample>
    <structure_determination_list>
        <structure_determination structure_determination_id="1">
            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
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                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">0.8</concentration>
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">150.0</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                    </buffer>
                    <grid>
                        <model>Quantifoil</model>
                        <material>COPPER</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">20</time>
                        </pretreatment>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">298</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>4s
force 0. </details>
                    </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>
                    <c2_aperture_diameter units="µm">100.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <calibrated_defocus_min units="µm">0.8</calibrated_defocus_min>
                    <nominal_defocus_max units="µm">2.5</nominal_defocus_max>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <alignment_procedure>
                        <coma_free/>
                    </alignment_procedure>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <detector_mode>COUNTING</detector_mode>
                            <number_real_images>8500</number_real_images>
                            <average_electron_dose_per_image units="e/Å^2">70.0</average_electron_dose_per_image>
                        </image_recording>
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            <singleparticle_processing image_processing_id="1">
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                    <type>NONE</type>
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                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                    <number_images_used>240851</number_images_used>
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                <initial_angle_assignment>
                    <type>ANGULAR RECONSTITUTION</type>
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        </structure_determination>
    </structure_determination_list>
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            <row>300</row>
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        <spacing>
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            <y>300</y>
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        <cell>
            <a units="Å">410.01</a>
            <b units="Å">410.01</b>
            <c units="Å">410.01</c>
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            <average>-0.0024215458</average>
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                <source>AUTHOR</source>
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        <label>::::EMDATABANK.org::::EMD-14244::::</label>
        <annotation_details>pao-elongate</annotation_details>
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                <refinement_protocol>AB INITIO MODEL</refinement_protocol>
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