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                <code>R01AI139087</code>
                <country>United States</country>
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            <grant_reference>
                <funding_body>National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)</funding_body>
                <code>R01AI158503</code>
                <country>United States</country>
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                <code>R21AI163178</code>
                <country>United States</country>
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        <title>CryoEM structure of BoNT-NTNH-OrfX2 complex from Clostridium botulinum strain A1-ST7B, major class</title>
        <authors_list>
            <author>Gao L</author>
        </authors_list>
        <keywords>Botulinum neurotoxin, Progenitor toxin complex (PTC), TOXIN</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Gao L</author>
                    <author ORCID="0000-0003-2592-2442" order="2">Nowakowska MB</author>
                    <author order="3">Selby K</author>
                    <author order="4">Przykopanski A</author>
                    <author order="5">Chen B</author>
                    <author ORCID="0000-0001-9775-3110" order="6">Kruger M</author>
                    <author order="7">Douillard FP</author>
                    <author order="8">Lam KH</author>
                    <author ORCID="0000-0002-6356-7683" order="9">Chen P</author>
                    <author order="10">Huang T</author>
                    <author order="11">Minton NP</author>
                    <author ORCID="0000-0002-8176-797X" order="12">Dorner MB</author>
                    <author order="13">Dorner BG</author>
                    <author ORCID="0000-0002-0645-1641" order="14">Rummel A</author>
                    <author ORCID="0000-0002-0421-7595" order="15">Lindstrom M</author>
                    <author ORCID="0000-0003-0348-7363" order="16">Jin R</author>
                    <title>Botulinum neurotoxins exploit host digestive proteases to boost their oral toxicity via activating OrfXs/P47.</title>
                    <journal_abbreviation>Nat.Struct.Mol.Biol.</journal_abbreviation>
                    <country>US</country>
                    <volume>32</volume>
                    <first_page>864</first_page>
                    <last_page>875</last_page>
                    <year>2025</year>
                    <external_references type="PUBMED">39838108</external_references>
                    <external_references type="DOI">doi:10.1038/s41594-024-01479-0</external_references>
                    <external_references type="ISSN">1545-9985</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
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                <pdb_id>9arl</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Ternary complex of M-PTC/A1-ST7B with OrfX2/A1-ST7B, major class</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Ternary complex of M-PTC/A1-ST7B with OrfX2/A1-ST7B, major class</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>
                <natural_source database="NCBI">
                    <organism ncbi="36826">Clostridium botulinum A</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.352</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Botulinum neurotoxin type A</name>
                <natural_source database="NCBI">
                    <organism ncbi="441771">Clostridium botulinum A str. Hall</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.149479859</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>MPFVNKQFNYKDPVNGVDIAYIKIPNAGQMQPVKAFKIHNKIWVIPERDTFTNPEEGDLNPPPEAKQVPVSYYDSTYLST
DNEKDNYLKGVTKLFERIYSTDLGRMLLTSIVRGIPFWGGSTIDTELKVIDTNCINVIQPDGSYRSEELNLVIIGPSADI
IQFECKSFGHEVLNLTRNGYGSTQYIRFSPDFTFGFEESLEVDTNPLLGAGKFATDPAVTLAHQLIHAGHRLYGIAINPN
RVFKVNTNAYYEMSGLEVSFEELRTFGGHDAKFIDSLQENEFRLYYYNKFKDIASTLNKAKSIVGTTASLQYMKNVFKEK
YLLSEDTSGKFSVDKLKFDKLYKMLTEIYTEDNFVKFFKVLNAKTFLNFDKAVFKINIVPKVNYTIYDGFNLRNTNLAAN
FNGQNTEINNMNFTKLKNFTGLFEFYKLLCVRGIITSKTKSLDKGYNKALNDLCIKVNNWDLFFSPSEDNFTNDLNKGEE
ITSDTNIEAAEENISLDLIQQYYLTFNFDNEPENISIENLSSDIIGQLELMPNIERFPNGKKYELDKYTMFHYLRAQEFE
HGKSRIALTNSVNEALLNPSRVYTFFSSDYVKKVNKATEAAMFLGWVEQLVYDFTDETSEVSTTDKIADITIIIPYIGPA
LNIGNMLYKDDFVGALIFSGAVILLEFIPEIAIPVLGTFALVSYIANKVLTVQTIDNALSKRNEKWDEVYKYIVTNWLAK
VNTQIDLIRKKMKEALENQAEATKAIINYQYNQYTEEEKNNINFNIDDLSSKLNESINKAMININKFLNQCSVSYLMNSM
IPYGVKRLEDFDASLKDALLKYIYDNRGTLIGQVDRLKDKVNNTLSTDIPFQLSKYVDNQRLLSTFTEYIKNIINTSILN
LRYESNHLIDLSRYASKINIGSKVNFDPIDKNQIQLFNLESSKIEVILKNAIVYNSMYENFSTSFWIRIPKYFNSISLNN
EYTIINCMENNSGWKVSLNYGEIIWTLQDTQEIKQRVVFKYSQMINISDYINRWIFVTITNNRLNNSKIYINGRLIDQKP
ISNLGNIHASNNIMFKLDGCRDTHRYIWIKYFNLFDKELNEKEIKDLYDNQSNSGILKDFWGDYLQYDKPYYMLNLYDPN
KYVDVNNVGIRGYMYLKGPRGSVMTTNIYLNSSLYRGTKFIIKKYASGNKDNIVRNNDRVYINVVVKNKEYRLATNASQA
GVEKILSALEIPDVGNLSQVVVMKSKNDQGITNKCKMNLQDNNGNDIGFIGFHQFNNIAKLVASNWYNRQIERSSRTLGC
SWEFIPVDDGWGERPL</string>
                    <external_references type="UNIPROTKB">P0DPI1</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>NtnH</name>
                <natural_source database="NCBI">
                    <organism ncbi="36826">Clostridium botulinum A</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.13528574999999998</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>MKINNNFNIDSLIDNRDVAIVRGRKTDTFFKVFQVAPNIWVAPERYYGESLNINEDQKSDGGIYDSNFLLTNDEKDEFLQ
ATVKILQRINNNVIGAKLLSLISTAIPFPYEYKPGDYRQTNYLVSKDNQHYYTANLVIFGPGTNIVENNAVYYKKEDSEN
GMGTMSEIWFQPFLTYKYDQFYVDPALELIKCLIKSLYYLYGIKPSDDLSIPYRLRSEFNSLEYSELDMVDFLISGGTDY
KLLNTNPYWFTDNYFINAPKNFEKYKNDYETKIKNNNDIANSIKLYLEQKFKTNVQDIWELNLSYFSTEFEIMMPEIFNN
ALNHYHRKEYYVIDYFKNYNINGFINGQIKTILLLSKYNKNIINKPELIVNLINENNSVLMKSNIYGDGLKGTIGNFYAV
YKIPYNIGDEYHINSSDSCLDNVDIKEIDNIPPINDADIYPYRKNCDPFTPVYNITETKEINTTIPFPVNYLQAQVTNSN
DINLSSDFLKVISSKDRSLVYSFLDNTIDYLDSIKYDGPIDTDKKYYLWLKEIFRNYSFDMTETQEVNTLCGFNKVVPWL
GKALNILNTGNSFIEEFKTLGPISLINKKENITMPKIEIDEIPNSMLNLSFKDLSENLFNIFSKNNSYFEKIYYDFLDQW
WTQYYSQYFDLICMAKRSVLAQESLIKKIIQKKLSYLIGNSNISSDNLALMNLTTTNTLRDISNESQIAMNNVNNFLNNV
AICVFQTNIYPKFISFMEQCINNINKNTREFIQKCTNITENEKLQLINQNIFSSLDFDFLNIENLKSLFNSETGLLIKEE
TSPYELVLYAFQEPGNNAIGDASGKNTSIEYSKDIGLVYGINSDALYLNGSNQSISFSNDFFENGLTNSFSIYFWLRNLG
KDTIKSKLIGSKEDNCGWEIYFQDTGLVFNMIDSNGNEKNIYLSDVSNNSWHYITISVDRLKEQLLIFIDDNLVANESIK
EILNIYSSNIISLLSENNPSYIEGLTILNKPTTSQEVLSNYFKVLNNSYIRDSSEERLEYNKTYQLYNYVFSENPIYEIK
QNNNIYLTINNTNNLNLQVSKFKLLSINPNKQYVQKLDEVIISVLDNMEKYIDISEDNRLQLIDNKNNAKKMIISNDIFI
SNCLTLSYNGKYICLSMKDENHNWMICNNDMSKYLYLWSFK</string>
                    <external_references type="UNIPROTKB">B0FNQ9</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>OrfX2</name>
                <natural_source database="NCBI">
                    <organism ncbi="36826">Clostridium botulinum A</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.084823297</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>MNNLKPFIYYDWEKTILKNTKENYSINEIIPKTFFMELHGTKITNSTLNGTWKSWNLTNEGEGSYPVLKCIIDDGYLDMN
FGASSEKIPLKNVWIKLCMKINPNSDGTYSIPEKSSSFYIKDNSLKISKDNLILDKYLNKLMLSYFKNNIKNIEMFINKS
RIQTKVVGDLSLLGWNTENSVSFRTMNEFIKKDNLYPKDFKAVYSYRKMTFTATGTFDSWEMTTGADGRNIRFKCPIKYA
VYDLDGDVFNSSTENFLLIQVDLTYFDSKTTINDPTGENDGKQFNLKIKTNDDKLKNVLIVTYNLTDTDGSMSSEDKDFL
SLAFRNWFNENIQQFEQIFAYILLDETAKIPEYQWLKPTQISYGSASVETANDEPDLDASIFSAMSMVENNTNSTPSHAV
DNRMLQLTKTQAAFGISFPLFIEHFLKQALLSSQFISVDDIVADINTLTITNNKQIIFGKVENSDGKNVDSSLKPGKLKL
SLQNNLIVLELFDLTWEQGRGVTGHFDFRQEYELALESKSGKQIPILKVHDEPEIEYYVEEAQWKTNEDMIVSAVVGTVF
SMILGASMKLAGSALSKAGKLIRSKATTIKGRKKIYINRSNVRQLRKDSGATEIELERINRRNSSIAAEDARLISNNGTT
SIQTLGDMKKKPMSTGQRIAIGAKKIAGTAVMFGAVGLGMNFGEMLINYINAMENNDYSAIPGINSFMQQCIGAMQWPDK
DSELKVTFGKLQGIYLLGGTLEKNNKTDNK</string>
                    <external_references type="UNIPROTKB">B0FNQ5</external_references>
                </sequence>
            </protein_or_peptide>
        </macromolecule_list>
    </sample>
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                            <formula>MES</formula>
                            <name>MES</name>
                        </component>
                        <component>
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                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                    </buffer>
                    <vitrification>
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                    </vitrification>
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                    <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_cs units="mm">2.7</nominal_cs>
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