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            <header_release>2022-04-27</header_release>
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        <title>Cryo-EM structure of nucleotide-free ABCA3</title>
        <authors_list>
            <author>Xie T</author>
            <author>Zhang ZK</author>
            <author>Yue J</author>
            <author>Gong X</author>
        </authors_list>
        <keywords>ABC transporter, MEMBRANE PROTEIN, TRANSLOCASE</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author ORCID="0000-0002-5445-664X" order="1">Xie T</author>
                    <author order="2">Zhang Z</author>
                    <author ORCID="0000-0002-0815-0092" order="3">Yue J</author>
                    <author order="4">Fang Q</author>
                    <author ORCID="0000-0003-3469-7718" order="5">Gong X</author>
                    <title>Cryo-EM structures of the human surfactant lipid transporter ABCA3.</title>
                    <journal_abbreviation>Sci Adv</journal_abbreviation>
                    <country>US</country>
                    <volume>8</volume>
                    <first_page>eabn3727</first_page>
                    <last_page>eabn3727</last_page>
                    <year>2022</year>
                    <external_references type="PUBMED">35394827</external_references>
                    <external_references type="DOI">doi:10.1126/sciadv.abn3727</external_references>
                    <external_references type="ISSN">2375-2548</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
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                <pdb_id>7w01</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>ABCA3</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>ABCA3</name>
                <parent>0</parent>
                <macromolecule_list>
                    <macromolecule>
                        <macromolecule_id>1</macromolecule_id>
                    </macromolecule>
                </macromolecule_list>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>Phospholipid-transporting ATPase ABCA3</name>
                <natural_source database="NCBI">
                    <organism ncbi="9606">Homo sapiens</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.19651365599999998</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="9606">Homo sapiens</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>MADYKDDDDKSGPDEVDASGRMAVLRQLALLLWKNYTLQKRKVLVTVLELFLPLLFSGILIWLRLKIQSENVPNATIYPG
QSIQELPLFFTFPPPGDTWELAYIPSHSDAAKTVTETVRRALVINMRVRGFPSEKDFEDYIRYDNCSSSVLAAVVFEHPF
NHSKEPLPLAVKYHLRFSYTRRNYMWTQTGSFFLKETEGWHTTSLFPLFPNPGPREPTSPDGGEPGYIREGFLAVQHAVD
RAIMEYHADAATRQLFQRLTVTIKRFPYPPFIADPFLVAIQYQLPLLLLLSFTYTALTIARAVVQEKERRLKEYMRMMGL
SSWLHWSAWFLLFFLFLLIAASFMTLLFCVKVKPNVAVLSRSDPSLVLAFLLCFAISTISFSFMVSTFFSKANMAAAFGG
FLYFFTYIPYFFVAPRYNWMTLSQKLCSCLLSNVAMAMGAQLIGKFEAKGMGIQWRDLLSPVNVDDDFCFGQVLGMLLLD
SVLYGLVTWYMEAVFPGQFGVPQPWYFFIMPSYWCGKPRAVAGKEEEDSDPEKALRNEYFEAEPEDLVAGIKIKHLSKVF
RVGNKDRAAVRDLNLNLYEGQITVLLGHNGAGKTTTLSMLTGLFPPTSGRAYISGYEISQDMVQIRKSLGLCPQHDILFD
NLTVAEHLYFYAQLKGLSRQKCPEEVKQMLHIIGLEDKWNSRSRFLSGGMRRKLSIGIALIAGSKVLILDEPTSGMDAIS
RRAIWDLLQRQKSDRTIVLTTHFMDEADLLGDRIAIMAKGELQCCGSSLFLKQKYGAGYHMTLVKEPHCNPEDISQLVHH
HVPNATLESSAGAELSFILPRESTHRFEGLFAKLEKKQKELGIASFGASITTMEEVFLRVGKLVDSSMDIQAIQLPALQY
QHERRASDWAVDSNLCGAMDPSDGIGALIEEERTAVKLNTGLALHCQQFWAMFLKKAAYSWREWKMVAAQVLVPLTCVTL
ALLAINYSSELFDDPMLRLTLGEYGRTVVPFSVPGTSQLGQQLSEHLKDALQAEGQEPREVLGDLEEFLIFRASVEGGGF
NERCLVAASFRDVGERTVVNALFNNQAYHSPATALAVVDNLLFKLLCGPHASIVVSNFPQPRSALQAAKDQFNEGRKGFD
IALNLLFAMAFLASTFSILAVSERAVQAKHVQFVSGVHVASFWLSALLWDLISFLIPSLLLLVVFKAFDVRAFTRDGHMA
DTLLLLLLYGWAIIPLMYLMNFFFLGAATAYTRLTIFNILSGIATFLMVTIMRIPAVKLEELSKTLDHVFLVLPNHCLGM
AVSSFYENYETRRYCTSSEVAAHYCKKYNIQYQENFYAWSAPGVGRFVASMAASGCAYLILLFLIETNLLQRLRGILCAL
RRRRTLTELYTRMPVLPEDQDVADERTRILAPSPDSLLHTPLIIKELSKVYEQRVPLLAVDRLSLAVQKGECFGLLGFNG
AGKTTTFKMLTGEESLTSGDAFVGGHRISSDVGKVRQRIGYCPQFDALLDHMTGREMLVMYARLRGIPERHIGACVENTL
RGLLLEPHANKLVRTYSGGNKRKLSTGIALIGEPAVIFLDEPSTGMDPVARRLLWDTVARARESGKAIIITSHSMEECEA
LCTRLAIMVQGQFKCLGSPQHLKSKFGSGYSLRAKVQSEGQQEALEEFKAFVDLTFPGSVLEDEHQGMVHYHLPGRDLSW
AKVFGILEKAKEKYGVDDYSVSQISLEQVFLSFAHLQPPTAEEGRLEGSDEVDAVEGSHHHHHHHHHH</string>
                    <external_references type="UNIPROTKB">Q99758</external_references>
                </sequence>
                <ec_number>7.6.2.1</ec_number>
            </protein_or_peptide>
            <ligand macromolecule_id="2">
                <name>2-acetamido-2-deoxy-beta-D-glucopyranose</name>
                <molecular_weight>
                    <theoretical units="MDa">0.000221208</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>NAG</formula>
            </ligand>
            <ligand macromolecule_id="3">
                <name>1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0006789400000000001</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>PX4</formula>
            </ligand>
            <ligand macromolecule_id="4">
                <name>(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate</name>
                <molecular_weight>
                    <theoretical units="MDa">0.0007600759999999999</theoretical>
                </molecular_weight>
                <number_of_copies>3</number_of_copies>
                <formula>POV</formula>
            </ligand>
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                        <ph>7.5</ph>
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                        <cryogen_name>ETHANE</cryogen_name>
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                    <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>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <nominal_defocus_max units="µm">2.0</nominal_defocus_max>
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                            <film_or_detector_model>GATAN K2 SUMMIT (4k x 4k)</film_or_detector_model>
                            <average_electron_dose_per_image units="e/Å^2">50.0</average_electron_dose_per_image>
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                    <type>NONE</type>
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                <startup_model type_of_model="OTHER"/>
                <final_reconstruction>
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                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <number_images_used>111435</number_images_used>
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