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        <sites>
            <deposition>PDBe</deposition>
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        <key_dates>
            <deposition>2018-12-18</deposition>
            <header_release>2019-08-21</header_release>
            <map_release>2019-08-21</map_release>
            <update>2026-08-26</update>
        </key_dates>
        <grant_support>
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                <funding_body>European Research Council</funding_body>
                <code>701309</code>
                <country>Austria</country>
            </grant_reference>
        </grant_support>
        <title>Complex III2 focused refinement from Ovine respiratory supercomplex I+III2</title>
        <authors_list>
            <author>Letts JA</author>
            <author>Sazanov LA</author>
        </authors_list>
        <keywords>complex III, cellular respiration, mitochondria, ELECTRON TRANSPORT</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Letts JA</author>
                    <author order="2">Fiedorczuk K</author>
                    <author order="3">Degliesposti G</author>
                    <author order="4">Skehel M</author>
                    <author order="5">Sazanov LA</author>
                    <title>Structures of Respiratory Supercomplex I+III2Reveal Functional and Conformational Crosstalk.</title>
                    <journal_abbreviation>Mol.Cell</journal_abbreviation>
                    <country>US</country>
                    <volume>75</volume>
                    <first_page>1131</first_page>
                    <last_page>1146.e6</last_page>
                    <year>2019</year>
                    <external_references type="PUBMED">31492636</external_references>
                    <external_references type="DOI">doi:10.1016/j.molcel.2019.07.022</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>
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        <pdb_list>
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                <db_name>EMDB</db_name>
                <accession_id>EMD-4481</accession_id>
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                <details>Complex III2 focused refinement from Ovine respiratory supercomplex I+III2</details>
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    </crossreferences>
    <sample>
        <name>Ovine mitochondrial SC I+III2</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Ovine mitochondrial SC I+III2</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>
                        <macromolecule_id>5</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>6</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>7</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>8</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>9</macromolecule_id>
                    </macromolecule>
                    <macromolecule>
                        <macromolecule_id>10</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <details>Complex III2 focused refinement from ovine respiratory SC I+III2</details>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                    <organelle>Mitochondria</organelle>
                    <cellular_location>Mitochondrial inner membrane</cellular_location>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">1.4</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Ubiquinol-cytochrome c reductase core protein 1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.049385413999999996</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>TATYAQALQSVPETQVSQLDNGLRVASEQSSQPTCTVGVWIDAGSRYETEKNNGAGYFVEHLAFKGTKNRPGNALEKEVE
SMGAHLNAYSTREHTAYYIKALSKDLPKAVELLADIVQNCSLEDSQIEKERDVILQELQENDTSMRDVVFNYLHATAFQG
TPLAQSVEGPSENVRKLSRADLTEYLSRHYKAPRMVLAAAGGLEHRQLLDLAQKHFSGLSGTYDEDAVPTLTPCRFTGSE
IRHREDGLPLAHVAIAVEGPGWANPDNVALQVANAIIGHYDCTYGGGMHLSSPLASVAVTNKLCQSFQTFNICYADTGLL
GAHFVCDHMSIDDMMFVLQGQWMRLCTSATESEVVRGKNLLRNALVSHLDGTTPVCEDIGRSLLTYGRRIPLAEWESRIA
EVDARVVREVCSKYFYDQCPAVAGFGPIEQLPDYNRIRSGMFWLRF</string>
                    <external_references type="UNIPROTKB">W5Q5G6</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Ubiquinol-cytochrome c reductase core protein 2</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.046655531</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SLKVAPKAKATAAPAGVPQHPQDLEFTRLPNGLVIASLENYAPASRIGLFIKAGSRYENFNNLGTSHLLRLASSLTTKGA
SSFKITRGIEAVGGKLSVTSTRENMAYTVECLRDDVDILMEFLLNVTTAPEFRRWEVAALQSQLRIDKAVAFQNPQAHVI
ENLHAAAYRNALANSLYCPDYRIGKVTPDELHDYVQNHFTSARMALIGLGVSHPVLKQVAEQFLNIRGGLGLSGAKAKYR
GGEIREQNGDSLVHAALVAESAAIGSAEANAFSVLQHVLGAGPHVKRGSNATSSLYQAVAKGVHQPFDVSAFNASYSDSG
LFGFYTISQAASAGDVIKAAYNQVKTIAQGNLSNPDVQAAKNKLKAGYLMSVESSEGFLDEVGCQALAAGSYTPPSTVLQ
QIDAVADADVINAAKKFVSGRKSMAASGNLGHTPFIDEL</string>
                    <external_references type="UNIPROTKB">W5Q0F9</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Cytochrome b</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.04287783999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MINIRKTHPLMKIVNNAFIDLPAPSNISSWWNFGSLLGICLILQILTGLFLAMHYTPDTTTAFSSVTHICRDVNYGWIIR
YMHANGASMFFICLFMHVGRGLYYGSYTFLETWNIGVILLFATMATAFMGYVLPWGQMSFWGATVITNLLSAIPYIGTNL
VEWIWGGFSVDKATLTRFFAFHFIFPFIIAALAMVHLLFLHETGSNNPTGIPSDTDKIPFHPYYTIKDILGAILLILILM
LLVLFTPDLLGDPDNYTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVLSILVLVIMPLLHTSKQRSMMFRPI
SQCMFWILVADLLTLTWIGGQPVEHPYIIIGQLASIMYFLIILVMMPVASIIENNLLKW</string>
                    <external_references type="UNIPROTKB">P24959</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="4">
                <name>Cytochrome c1</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.027322316</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SDLELHPPSYPWSHRGLLSSLDHTSIRRGFQVYKQVCSSCHSMDYVAYRHLVGVCYTEDEAKALAEEVEVQDGPNEDGEM
FMRPGKLSDYFPKPYPNPEAARAANNGALPPDLSYIVRARHGGEDYVFSLLTGYCEPPRVSLREGLYFNPYFPGQAIGMA
PPIYNEVLEFDDGTPATMSQVAKDVCTFLRWAAEPEHDHRKRMGLKMLLMMGLLLPLVYAMKRHKWSVLKSRKLAYRPPK</string>
                    <external_references type="UNIPROTKB">W5Q0A9</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="5">
                <name>Cytochrome b-c1 complex subunit Rieske, mitochondrial</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.021654607</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SHTDIKVPDFSDYRRPEVLDSTKSSKESSEARKGFSYLITATTTVGVAYAAKNVVSQFVSSMSASADVLAMSKIEIKLSD
IPEGKNMAFKWRGKPLFVRHRTKKEIDQEAAVEVSQLRDPQHDLERVKKPEWVILIGVCTHLGCVPIANAGDFGGYYCPC
HGSHYDASGRIRKGPAPLNLEVPSYEFTSDDMVIVG</string>
                    <external_references type="UNIPROTKB">W5P2X9</external_references>
                </sequence>
                <ec_number>1.10.2.2</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="6">
                <name>Cytochrome b-c1 complex subunit 7</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.013432313999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AGRPAVSASSKWLEGIRKWYYNAAGFNKLGLMRDDTIHENDDVKEAIRRLPENLYNDRVFRIKRALDLSMRQQILPKEQW
TKYEEDKFYLEPYLKEVIRERKEREEWTKK</string>
                    <external_references type="UNIPROTKB">W5P642</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="7">
                <name>Ubiquinol-cytochrome c reductase complex III subunit VII</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009606067</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>GRQFGHLTRVRHVITYSLSPFEQRAFPHYFSKGIPNVLRRTRACILRVAPPFVVFYLVYTWGTQEFEKSKRKNPAAYEND
K</string>
                    <external_references type="UNIPROTKB">W5PUP9</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="8">
                <name>Cytochrome b-c1 complex subunit 6</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009223133</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>GDPKEEEEEEEELVDPLTTVREQCEQLEKCVKARERLELCDERVSSRSQTEEDCTEELFDFLHARDHCVAHKLFNSLK</string>
                    <external_references type="UNIPROTKB">W5PZC9</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="9">
                <name>Cytochrome b-c1 complex subunit Rieske, mitochondrial</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.0028264749999999997</theoretical>
                </molecular_weight>
                <details>Modeled as poly-alanine due to poor density.</details>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)
(UNK)</string>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="10">
                <name>Ubiquinol-cytochrome c reductase, complex III subunit X</name>
                <natural_source database="NCBI">
                    <organism ncbi="9940">Ovis aries</organism>
                    <organ>Heart</organ>
                    <tissue>Cardiac</tissue>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.007310372</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AAPTLTARLYSLLFRRTSTFALTIVVGALFFERAFDQGADAIYEHINEGKLWKHIKHKYENKE</string>
                    <external_references type="UNIPROTKB">W5P6B2</external_references>
                </sequence>
            </protein_or_peptide>
            <ligand macromolecule_id="11">
                <name>PROTOPORPHYRIN IX CONTAINING FE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000616487</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>HEM</formula>
            </ligand>
            <ligand macromolecule_id="12">
                <name>1,2-Distearoyl-sn-glycerophosphoethanolamine</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000748065</theoretical>
                </molecular_weight>
                <number_of_copies>4</number_of_copies>
                <formula>3PE</formula>
            </ligand>
            <ligand macromolecule_id="13">
                <name>CARDIOLIPIN</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0014640429999999997</theoretical>
                </molecular_weight>
                <number_of_copies>5</number_of_copies>
                <formula>CDL</formula>
            </ligand>
            <ligand macromolecule_id="14">
                <name>UBIQUINONE-10</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0008633429999999999</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>U10</formula>
            </ligand>
            <ligand macromolecule_id="15">
                <name>HEME C</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0006205189999999999</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>HEC</formula>
            </ligand>
            <ligand macromolecule_id="16">
                <name>FE2/S2 (INORGANIC) CLUSTER</name>
                <molecular_weight>
                    <theoretical units="MDa">0.00017581999999999998</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>FES</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">
                    <concentration units="mg/mL">2</concentration>
                    <buffer>
                        <ph>7.4</ph>
                        <component>
                            <concentration units="M">0.25</concentration>
                            <formula>NaCl</formula>
                            <name>sodium chloride</name>
                        </component>
                        <component>
                            <concentration units="M">0.02</concentration>
                            <name>HEPES</name>
                        </component>
                        <component>
                            <concentration units="%">0.02</concentration>
                            <name>Brij-35</name>
                        </component>
                        <details>250 mM NaCl, 20 mM HEPES, pH 7.7, 0.02% Brij-35</details>
                    </buffer>
                    <vitrification>
                        <cryogen_name>PROPANE</cryogen_name>
                        <chamber_humidity units="percentage">95</chamber_humidity>
                        <chamber_temperature units="K">277</chamber_temperature>
                        <instrument>FEI VITROBOT MARK IV</instrument>
                        <details>blotting for 30 seconds at 4 degrees Celsius, 95% humidity and flash freezing. </details>
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                </single_particle_preparation>
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                <single_particle_microscopy microscopy_id="1">
                    <microscope>FEI TITAN KRIOS</microscope>
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                    <electron_source>FIELD EMISSION GUN</electron_source>
                    <acceleration_voltage units="kV">300</acceleration_voltage>
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                        <software>
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                        <pdb_id>5LNK</pdb_id>
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                        <point_group>C1</point_group>
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                    <algorithm>FOURIER SPACE</algorithm>
                    <resolution units="Å" res_type="BY AUTHOR">3.9</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
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                        <software>
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        <label>::::EMDATABANK.org::::EMD-4481::::</label>
        <annotation_details>Focused refinement around complex III2 from ovine mitochondrial supercomplex I III2</annotation_details>
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                    <medium>Y</medium>
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Half map 1</annotation_details>
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</emd>
