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        <title>Cas nuclease-CRISPR (cr)RNA ribonucleoprotein (RNP) complex</title>
        <authors_list>
            <author>Schmelz S</author>
            <author>Lukat P</author>
            <author>Blankenfeldt W</author>
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        <keywords>AcrVIB1; anti-CRISPR protein; Cas13b, RNA BINDING PROTEIN</keywords>
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        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Wandera KG</author>
                    <author order="2">Schmelz S</author>
                    <author order="3">Migur A</author>
                    <author order="4">Kibe A</author>
                    <author order="5">Lukat P</author>
                    <author order="6">Achmedov T</author>
                    <author order="7">Caliskan N</author>
                    <author order="8">Blankenfeldt W</author>
                    <author order="9">Beisel CL</author>
                    <title>AcrVIB1 inhibits CRISPR-Cas13b immunity by promoting unproductive crRNA binding accessible to RNase attack.</title>
                    <journal_abbreviation>Mol.Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>85</volume>
                    <first_page>1162</first_page>
                    <year>2025</year>
                    <external_references type="PUBMED">39965569</external_references>
                    <external_references type="DOI">doi:10.1016/j.molcel.2025.01.020</external_references>
                    <external_references type="ISSN">1097-2765</external_references>
                    <external_references type="CSD">2168</external_references>
                    <external_references type="ASTM">MOCEFL</external_references>
                </journal_citation>
            </primary_citation>
            <secondary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0003-3921-3209" order="10">Liebschner D</author>
                    <author ORCID="0000-0002-5052-991X" order="11">Afonine PV</author>
                    <author order="12">Baker ML</author>
                    <author order="13">Bunkoczi G</author>
                    <author ORCID="0000-0003-2492-979X" order="14">Chen VB</author>
                    <author order="15">Croll TI</author>
                    <author ORCID="0000-0002-4871-2096" order="16">Hintze B</author>
                    <author ORCID="0000-0001-6690-8458" order="17">Hung LW</author>
                    <author order="18">Jain S</author>
                    <author order="19">McCoy AJ</author>
                    <author ORCID="0000-0001-8857-9464" order="20">Moriarty NW</author>
                    <author ORCID="0000-0003-3107-2202" order="21">Oeffner RD</author>
                    <author ORCID="0000-0001-9633-6067" order="22">Poon BK</author>
                    <author order="23">Prisant MG</author>
                    <author ORCID="0000-0001-8273-0047" order="24">Read RJ</author>
                    <author ORCID="0000-0002-3311-2944" order="25">Richardson JS</author>
                    <author order="26">Richardson DC</author>
                    <author ORCID="0000-0002-8346-9247" order="27">Sammito MD</author>
                    <author ORCID="0000-0002-0623-3214" order="28">Sobolev OV</author>
                    <author order="29">Stockwell DH</author>
                    <author ORCID="0000-0001-6384-0320" order="30">Terwilliger TC</author>
                    <author order="31">Urzhumtsev AG</author>
                    <author order="32">Videau LL</author>
                    <author order="33">Williams CJ</author>
                    <author ORCID="0000-0001-9333-8219" order="34">Adams PD</author>
                    <title>Macromolecular structure determination using X-rays, neutrons and electrons: recent developments in Phenix</title>
                    <journal_abbreviation>Acta Crystallogr., Sect. D: Biol. Crystallogr.</journal_abbreviation>
                    <country>DK</country>
                    <volume>75</volume>
                    <first_page>861</first_page>
                    <last_page>877</last_page>
                    <year>2019</year>
                    <external_references type="PUBMED">31588918</external_references>
                    <external_references type="DOI">doi:10.1107/S2059798319011471</external_references>
                    <external_references type="ISSN">0907-4449</external_references>
                    <external_references type="CSD">0766</external_references>
                    <external_references type="ASTM">ABCRE6</external_references>
                </journal_citation>
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                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
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                    <macromolecule>
                        <macromolecule_id>2</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="28126">Segatella buccae</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Phage head-tail adaptor</name>
                <natural_source database="NCBI">
                    <organism ncbi="28126">Segatella buccae</organism>
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                <molecular_weight>
                    <theoretical units="MDa">0.134285938</theoretical>
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                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
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                <enantiomer>LEVO</enantiomer>
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IKGSWNEQAKKLDKKVRLRDLIMKHFPFLEAAAYEMTNSKSPNNKEQREKEQSEALSLNNLKNVLFIFLEKLQVLRNYYS
HYKYSEESPKPIFETSLLKNMYKVFDANVRLVKRDYMHHENIDMQRDFTHLNRKKQVGRTKNIIDSPNFHYHFADKEGNM
TIAGLLFFVSLFLDKKDAIWMQKKLKGFKDGRNLREQMTNEVFCRSRISLPKLKLENVQTKDWMQLDMLNELVRCPKSLY
ERLREKDRESFKVPFDIFSDDYNAEEEPFKNTLVRHQDRFPYFVLRYFDLNEIFEQLRFQIDLGTYHFSIYNKRIGDEDE
VRHLTHHLYGFARIQDFAPQNQPEEWRKLVKDLDHFETSQEPYISKTAPHYHLENEKIGIKFCSAHNNLFPSLQTDKTCN
GRSKFNLGTQFTAEAFLSVHELLPMMFYYLLLTKDYSRKESADKVEGIIRKEISNIYAIYDAFANNEINSIADLTRRLQN
TNILQGHLPKQMISILKGRQKDMGKEAERKIGEMIDDTQRRLDLLCKQTNQKIRIGKRNAGLLKSGKIADWLVNDMMRFQ
PVQKDQNNIPINNSKANSTEYRMLQRALALFGSENFRLKAYFNQMNLVGNDNPHPFLAETQWEHQTNILSFYRNYLEARK
KYLKGLKPQNWKQYQHFLILKVQKTNRNTLVTGWKNSFNLPRGIFTQPIREWFEKHNNSKRIYDQILSFDRVGFVAKAIP
LYFAEEYKDNVQPFYDYPFNIGNRLKPKKRQFLDKKERVELWQKNKELFKNYPSEKKKTDLAYLDFLSWKKFERELRLIK
NQDIVTWLMFKELFNMATVEGLKIGEIHLRDIDTNTANEESNNILNRIMPMKLPVKTYETDNKGNILKERPLATFYIEET
ETKVLKQGNFKALVKDRRLNGLFSFAETTDLNLEEHPISKLSVDLELIKYQTTRISIFEMTLGLEKKLIDKYSTLPTDSF
RNMLERWLQCKANRPELKNYVNSLIAVRNAFSHNQYPMYDATLFAEVKKFTLFPSVDTKKIELNIAPQLLEIVGKAIKEI
EKSENKN</string>
                    <external_references type="UNIPROTKB">E6K398</external_references>
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            </protein_or_peptide>
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                </natural_source>
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                </molecular_weight>
                <details>unprocessed crRNA</details>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>CGUCGCCGUCCAGCUCGACCAGGAUGGGAAGUUGCAUCUGCCUUCUUUUUGAAAGGUAAAAACAACAUCGUCCAUUCCGA
C</string>
                </sequence>
            </rna>
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            <aggregation_state>particle</aggregation_state>
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                        <ph>7.0</ph>
                        <details>20mM HEPES pH7.0
120 mM NaCl
0.5 mM DTT</details>
                    </buffer>
                    <grid>
                        <model>Quantifoil R1.2/1.3</model>
                        <material>COPPER</material>
                        <mesh>200</mesh>
                        <pretreatment>
                            <type>GLOW DISCHARGE</type>
                            <time units="s">60</time>
                            <atmosphere>AIR</atmosphere>
                        </pretreatment>
                        <details>15 mA</details>
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                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
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                        <chamber_temperature units="K">283</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
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