<?xml version="1.0" encoding="UTF-8"?>
<emd xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://ftp.ebi.ac.uk/pub/databases/em_ebi/emdb_related/emdb-schemas/emdb_schemas/v3/v3_0_8_0/emdb.xsd" version="3.0.8.0" emdb_id="EMD-20267">
    <admin>
        <current_status>
            <date>2023-08-16</date>
            <code>REL</code>
            <processing_site>RCSB</processing_site>
        </current_status>
        <sites>
            <deposition>RCSB</deposition>
            <last_processing>RCSB</last_processing>
        </sites>
        <key_dates>
            <deposition>2019-06-06</deposition>
            <header_release>2019-07-17</header_release>
            <map_release>2019-08-21</map_release>
            <update>2023-08-16</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Howard Hughes Medical Institute (HHMI)</funding_body>
                <country>United States</country>
            </grant_reference>
        </grant_support>
        <title>Cryo-EM structure of LbCas12a-crRNA: AcrVA4 (2:2 complex)</title>
        <authors_list>
            <author>Knott GJ</author>
            <author>Liu JJ</author>
        </authors_list>
        <keywords>CRISPR-Cas, anti-CRISPR, Cas12a, Cpf1, LbCas12a, AcrVA4, RNA BINDING PROTEIN-RNA complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-9007-6273" order="1">Knott GJ</author>
                    <author order="2">Cress BF</author>
                    <author order="3">Liu JJ</author>
                    <author order="4">Thornton BW</author>
                    <author order="5">Lew RJ</author>
                    <author order="6">Al-Shayeb B</author>
                    <author ORCID="0000-0001-8017-8156" order="7">Rosenberg DJ</author>
                    <author order="8">Hammel M</author>
                    <author order="9">Adler BA</author>
                    <author order="10">Lobba MJ</author>
                    <author order="11">Xu M</author>
                    <author ORCID="0000-0002-4999-2931" order="12">Arkin AP</author>
                    <author ORCID="0000-0002-9545-5723" order="13">Fellmann C</author>
                    <author ORCID="0000-0001-9161-999X" order="14">Doudna JA</author>
                    <title>Structural basis for AcrVA4 inhibition of specific CRISPR-Cas12a.</title>
                    <journal_abbreviation>Elife</journal_abbreviation>
                    <country>US</country>
                    <volume>8</volume>
                    <year>2019</year>
                    <external_references type="PUBMED">31397669</external_references>
                    <external_references type="DOI">doi:10.7554/eLife.49110</external_references>
                    <external_references type="ISSN">2050-084X</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author order="15">Adams PD</author>
                    <author order="16">Afonine PV</author>
                    <author order="17">Bunkoczi G</author>
                    <author order="18">Chen VB</author>
                    <author order="19">Davis IW</author>
                    <author order="20">Echols N</author>
                    <author order="21">Headd JJ</author>
                    <author order="22">Hung LW</author>
                    <author order="23">Kapral GJ</author>
                    <author order="24">Grosse-Kunstleve RW</author>
                    <author order="25">McCoy AJ</author>
                    <author order="26">Moriarty NW</author>
                    <author order="27">Oeffner R</author>
                    <author order="28">Read RJ</author>
                    <author order="29">Richardson DC</author>
                    <author order="30">Richardson JS</author>
                    <author order="31">Terwilliger TC</author>
                    <author order="32">Zwart PH</author>
                    <title>PHENIX: a comprehensive Python-based system for macromolecular structure solution.</title>
                    <journal_abbreviation>Acta Crystallogr.,Sect.D</journal_abbreviation>
                    <country>US</country>
                    <volume>66</volume>
                    <first_page>213</first_page>
                    <last_page>221</last_page>
                    <year>2010</year>
                    <external_references type="PUBMED">20124702</external_references>
                    <external_references type="DOI">doi:10.1107/S0907444909052925</external_references>
                    <external_references type="ISSN">1399-0047</external_references>
                    <external_references type="ASTM">ABCRE6</external_references>
                </journal_citation>
            </secondary_citation>
        </citation_list>
        <emdb_list>
            <emdb_reference>
                <emdb_id>EMD-20266</emdb_id>
                <relationship>
                    <other>other EM volume</other>
                </relationship>
                <details>Cryo-EM structure of LbCas12a-crRNA: AcrVA4 (1:2 complex)</details>
            </emdb_reference>
        </emdb_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>6p7n</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>LbCas12a-crRNA-AcrVA4 Complex (2:2, State I)</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>LbCas12a-crRNA-AcrVA4 Complex (2:2, State I)</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>
                <details>Homodimeric AcrVA4 bound to two copies of the LbCas12a-crRNA complex.</details>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="2">
                <name>LbCas12a</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="1410628">Lachnospiraceae bacterium ND2006</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="3">
                <name>crRNA</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>3</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="1410628">Lachnospiraceae bacterium ND2006</organism>
                </natural_source>
            </complex_supramolecule>
            <complex_supramolecule supramolecule_id="4">
                <name>AcrVA4</name>
                <parent>1</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="386891">Moraxella bovoculi</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>anti-CRISPR VA4</name>
                <natural_source database="NCBI">
                    <organism ncbi="386891">Moraxella bovoculi</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.027641422</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SNAMYEIKLNDTLIHQTDDRVNAFVAYRYLLRRGDLPKCENIARMYYDGKVIKTDVIDHDSVHSDEQAKVSNNDIIKMAI
SELGVNNFKSLIKKQGYPFSNGHINSWFTDDPVKSKTMHNDEMYLVVQALIRACIIKEIDLYTEQLYNIIKSLPYDKRPN
VVYSDQPLDPNNLDLSEPELWAEQVGECMRYAHNDQPCFYIGSTKRELRVNYIVPVIGVRDEIERVMTLEEVRNLHK</string>
                    <external_references type="UNIPROTKB">A0A0U2APF4</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Cas12a</name>
                <natural_source database="NCBI">
                    <organism ncbi="1410628">Lachnospiraceae bacterium ND2006</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.144160609</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="562">Escherichia coli</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SNAMSKLEKFTNCYSLSKTLRFKAIPVGKTQENIDNKRLLVEDEKRAEDYKGVKKLLDRYYLSFINDVLHSIKLKNLNNY
ISLFRKKTRTEKENKELENLEINLRKEIAKAFKGNEGYKSLFKKDIIETILPEFLDDKDEIALVNSFNGFTTAFTGFFDN
RENMFSEEAKSTSIAFRCINENLTRYISNMDIFEKVDAIFDKHEVQEIKEKILNSDYDVEDFFEGEFFNFVLTQEGIDVY
NAIIGGFVTESGEKIKGLNEYINLYNQKTKQKLPKFKPLYKQVLSDRESLSFYGEGYTSDEEVLEVFRNTLNKNSEIFSS
IKKLEKLFKNFDEYSSAGIFVKNGPAISTISKDIFGEWNVIRDKWNAEYDDIHLKKKAVVTEKYEDDRRKSFKKIGSFSL
EQLQEYADADLSVVEKLKEIIIQKVDEIYKVYGSSEKLFDADFVLEKSLKKNDAVVAIMKDLLDSVKSFENYIKAFFGEG
KETNRDESFYGDFVLAYDILLKVDHIYDAIRNYVTQKPYSKDKFKLYFQNPQFMGGWDKDKETDYRATILRYGSKYYLAI
MDKKYAKCLQKIDKDDVNGNYEKINYKLLPGPNKMLPKVFFSKKWMAYYNPSEDIQKIYKNGTFKKGDMFNLNDCHKLID
FFKDSISRYPKWSNAYDFNFSETEKYKDIAGFYREVEEQGYKVSFESASKKEVDKLVEEGKLYMFQIYNKDFSDKSHGTP
NLHTMYFKLLFDENNHGQIRLSGGAELFMRRASLKKEELVVHPANSPIANKNPDNPKKTTTLSYDVYKDKRFSEDQYELH
IPIAINKCPKNIFKINTEVRVLLKHDDNPYVIGIDRGERNLLYIVVVDGKGNIVEQYSLNEIINNFNGIRIKTDYHSLLD
KKEKERFEARQNWTSIENIKELKAGYISQVVHKICELVEKYDAVIALEDLNSGFKNSRVKVEKQVYQKFEKMLIDKLNYM
VDKKSNPCATGGALKGYQITNKFESFKSMSTQNGFIFYIPAWLTSKIDPSTGFVNLLKTKYTSIADSKKFISSFDRIMYV
PEEDLFEFALDYKNFSRTDADYIKKWKLYSYGNRIRIFRNPKKNNVFDWEEVCLTSAYKELFNKYGINYQQGDIRALLCE
QSDKAFYSSFMALMSLMLQMRNSITGRTDVDFLISPVKNSDGIFYDSRNYEAQENAILPKNADANGAYNIARKVLWAIGQ
FKKAEDEKLDKVKIAISNKEWLEYAQTSVKH</string>
                </sequence>
            </protein_or_peptide>
            <rna macromolecule_id="3">
                <name>mature crRNA</name>
                <natural_source database="NCBI">
                    <organism ncbi="1410628">Lachnospiraceae bacterium ND2006</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.012815634</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <sequence>
                    <string>AAUUUCUACUAAGUGUAGAUAAAGUGCUCAUCAUUGGAAA</string>
                </sequence>
            </rna>
            <ligand macromolecule_id="4">
                <name>MAGNESIUM ION</name>
                <molecular_weight>
                    <theoretical units="MDa">2.4305e-05</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>MG</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">
                    <buffer>
                        <ph>7.5</ph>
                        <component>
                            <concentration units="mM">20.0</concentration>
                            <formula>C8H18N2O4S</formula>
                            <name>HEPES</name>
                        </component>
                        <component>
                            <concentration units="mM">200.0</concentration>
                            <formula>KCl</formula>
                            <name>potassium chloride</name>
                        </component>
                        <component>
                            <concentration units="mM">1.0</concentration>
                            <formula>C9H15O6P</formula>
                            <name>tris((2-carboxyethyl)phosphine)</name>
                        </component>
                        <component>
                            <concentration units="% (v/v)">0.1</concentration>
                            <formula>C3H8O3</formula>
                            <name>glycerol</name>
                        </component>
                    </buffer>
                    <grid>
                        <details>unspecified</details>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                    </vitrification>
                </single_particle_preparation>
            </specimen_preparation_list>
            <microscopy_list>
                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN 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>
                    <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>SUPER-RESOLUTION</detector_mode>
                            <average_electron_dose_per_image units="e/Å^2">42.0</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>
                <startup_model type_of_model="PDB ENTRY">
                    <pdb_model>
                        <pdb_id>5ID6</pdb_id>
                    </pdb_model>
                </startup_model>
                <final_reconstruction>
                    <number_classes_used>1</number_classes_used>
                    <applied_symmetry>
                        <point_group>C1</point_group>
                    </applied_symmetry>
                    <resolution units="Å" res_type="BY AUTHOR">4.9</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>79787</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>NOT APPLICABLE</type>
                </final_angle_assignment>
            </singleparticle_processing>
        </structure_determination>
    </structure_determination_list>
    <map format="CCP4" size_kbytes="157217">
        <file>emd_20267.map.gz</file>
        <symmetry>
            <space_group>1</space_group>
        </symmetry>
        <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
        <dimensions>
            <col>340</col>
            <row>340</row>
            <sec>340</sec>
        </dimensions>
        <origin>
            <col>0</col>
            <row>0</row>
            <sec>0</sec>
        </origin>
        <spacing>
            <x>340</x>
            <y>340</y>
            <z>340</z>
        </spacing>
        <cell>
            <a units="Å">306.0</a>
            <b units="Å">306.0</b>
            <c units="Å">306.0</c>
            <alpha units="deg">90.0</alpha>
            <beta units="deg">90.0</beta>
            <gamma units="deg">90.0</gamma>
        </cell>
        <axis_order>
            <fast>X</fast>
            <medium>Y</medium>
            <slow>Z</slow>
        </axis_order>
        <statistics>
            <minimum>-0.24226066</minimum>
            <maximum>0.6646911</maximum>
            <average>0.0021240285</average>
            <std>0.03206585</std>
        </statistics>
        <pixel_spacing>
            <x units="Å">0.9</x>
            <y units="Å">0.9</y>
            <z units="Å">0.9</z>
        </pixel_spacing>
        <contour_list>
            <contour primary="true">
                <level>0.08</level>
                <source>EMDB</source>
            </contour>
        </contour_list>
        <label>::::EMDATABANK.org::::EMD-20267::::</label>
        <annotation_details>3D Reconstruction (State II)</annotation_details>
    </map>
    <interpretation>
        <half_map_list>
            <half_map format="CCP4" size_kbytes="157217">
                <file>emd_20267_half_map_1.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>340</col>
                    <row>340</row>
                    <sec>340</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
                </origin>
                <spacing>
                    <x>340</x>
                    <y>340</y>
                    <z>340</z>
                </spacing>
                <cell>
                    <a units="Å">306.0</a>
                    <b units="Å">306.0</b>
                    <c units="Å">306.0</c>
                    <alpha units="deg">90.0</alpha>
                    <beta units="deg">90.0</beta>
                    <gamma units="deg">90.0</gamma>
                </cell>
                <axis_order>
                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
                </axis_order>
                <statistics>
                    <minimum>-1.5239271</minimum>
                    <maximum>1.5669408</maximum>
                    <average>0.001867974</average>
                    <std>0.19434965</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">0.9</x>
                    <y units="Å">0.9</y>
                    <z units="Å">0.9</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>EMDB</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-20267::::</label>
                <annotation_details>3D Reconstruction (State II) Half Map A</annotation_details>
            </half_map>
            <half_map format="CCP4" size_kbytes="157217">
                <file>emd_20267_half_map_2.map.gz</file>
                <symmetry>
                    <space_group>1</space_group>
                </symmetry>
                <data_type>IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)</data_type>
                <dimensions>
                    <col>340</col>
                    <row>340</row>
                    <sec>340</sec>
                </dimensions>
                <origin>
                    <col>0</col>
                    <row>0</row>
                    <sec>0</sec>
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                <spacing>
                    <x>340</x>
                    <y>340</y>
                    <z>340</z>
                </spacing>
                <cell>
                    <a units="Å">306.0</a>
                    <b units="Å">306.0</b>
                    <c units="Å">306.0</c>
                    <alpha units="deg">90.0</alpha>
                    <beta units="deg">90.0</beta>
                    <gamma units="deg">90.0</gamma>
                </cell>
                <axis_order>
                    <fast>X</fast>
                    <medium>Y</medium>
                    <slow>Z</slow>
                </axis_order>
                <statistics>
                    <minimum>-1.5139947</minimum>
                    <maximum>1.6187271</maximum>
                    <average>0.0018403344</average>
                    <std>0.19412945</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">0.9</x>
                    <y units="Å">0.9</y>
                    <z units="Å">0.9</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>EMDB</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-20267::::</label>
                <annotation_details>3D Reconstruction (State II) Half Map B</annotation_details>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
