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            <last_processing>PDBj</last_processing>
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        <key_dates>
            <deposition>2020-04-27</deposition>
            <header_release>2020-06-03</header_release>
            <map_release>2020-06-03</map_release>
            <update>2024-03-27</update>
        </key_dates>
        <grant_support>
            <grant_reference>
                <funding_body>Ministry of Science and Technology (MoST, China)</funding_body>
                <code>2017YFC0840300</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Ministry of Science and Technology (MoST, China)</funding_body>
                <code>2020YFA0707500</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Ministry of Science and Technology (MoST, China)</funding_body>
                <code>2018YFA0507200</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>Chinese Academy of Sciences</funding_body>
                <code>XDB08020200</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <code>81520108019</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <code>813300237</code>
                <country>China</country>
            </grant_reference>
            <grant_reference>
                <funding_body>National Natural Science Foundation of China (NSFC)</funding_body>
                <code>32041007</code>
                <country>China</country>
            </grant_reference>
        </grant_support>
        <title>COVID-19 RNA-dependent RNA polymerase post-translocated catalytic complex</title>
        <authors_list>
            <author>Wang Q</author>
            <author>Gao Y</author>
            <author>Ji W</author>
            <author>Mu A</author>
            <author>Rao Z</author>
        </authors_list>
        <keywords>COVID-19, 2019-nCoV, SARS-CoV-2, Virus, RdRp, nsp12, nsp7, nsp8, RTC, cryo-EM, Viral protein, RNA polymerase, drug target, antiviral, replication transcription complex, VIRAL PROTEIN-RNA complex</keywords>
    </admin>
    <crossreferences>
        <citation_list>
            <primary_citation>
                <journal_citation published="true">
                    <author order="1">Wang Q</author>
                    <author order="2">Wu J</author>
                    <author order="3">Wang H</author>
                    <author order="4">Gao Y</author>
                    <author order="5">Liu Q</author>
                    <author order="6">Mu A</author>
                    <author order="7">Ji W</author>
                    <author order="8">Yan L</author>
                    <author order="9">Zhu Y</author>
                    <author order="10">Zhu C</author>
                    <author order="11">Fang X</author>
                    <author order="12">Yang X</author>
                    <author order="13">Huang Y</author>
                    <author order="14">Gao H</author>
                    <author order="15">Liu F</author>
                    <author order="16">Ge J</author>
                    <author order="17">Sun Q</author>
                    <author order="18">Yang X</author>
                    <author order="19">Xu W</author>
                    <author order="20">Liu Z</author>
                    <author order="21">Yang H</author>
                    <author order="22">Lou Z</author>
                    <author order="23">Jiang B</author>
                    <author order="24">Guddat LW</author>
                    <author order="25">Gong P</author>
                    <author order="26">Rao Z</author>
                    <title>Structural Basis for RNA Replication by the SARS-CoV-2 Polymerase.</title>
                    <journal_abbreviation>Cell</journal_abbreviation>
                    <volume>182</volume>
                    <first_page>417</first_page>
                    <last_page>428.e13</last_page>
                    <year>2020</year>
                    <external_references type="PUBMED">32526208</external_references>
                    <external_references type="DOI">doi:10.1016/j.cell.2020.05.034</external_references>
                    <external_references type="ISSN">1097-4172</external_references>
                </journal_citation>
            </primary_citation>
        </citation_list>
        <pdb_list>
            <pdb_reference>
                <pdb_id>7bzf</pdb_id>
                <relationship>
                    <in_frame>FULLOVERLAP</in_frame>
                </relationship>
            </pdb_reference>
        </pdb_list>
    </crossreferences>
    <sample>
        <name>Structure of COVID-19 RNA-dependent RNA polymerase in complex with RNA</name>
        <supramolecule_list>
            <complex_supramolecule supramolecule_id="1">
                <name>Structure of COVID-19 RNA-dependent RNA polymerase in complex with RNA</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_list>
                <details>full-length COVID-19 nsp12 (residues S1-Q932) was incubated with nsp7 (residues S1-Q83) and nsp8 (A1-Q198), and in complex with RNA template and product.</details>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.155</theoretical>
                </molecular_weight>
            </complex_supramolecule>
        </supramolecule_list>
        <macromolecule_list>
            <protein_or_peptide macromolecule_id="1">
                <name>RNA-directed RNA polymerase</name>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.10816246099999999</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SADAQSFLNRVCGVSAARLTPCGTGTSTDVVYRAFDIYNDKVAGFAKFLKTNCCRFQEKDEDDNLIDSYFVVKRHTFSNY
QHEETIYNLLKDCPAVAKHDFFKFRIDGDMVPHISRQRLTKYTMADLVYALRHFDEGNCDTLKEILVTYNCCDDDYFNKK
DWYDFVENPDILRVYANLGERVRQALLKTVQFCDAMRNAGIVGVLTLDNQDLNGNWYDFGDFIQTTPGSGVPVVDSYYSL
LMPILTLTRALTAESHVDTDLTKPYIKWDLLKYDFTEERLKLFDRYFKYWDQTYHPNCVNCLDDRCILHCANFNVLFSTV
FPPTSFGPLVRKIFVDGVPFVVSTGYHFRELGVVHNQDVNLHSSRLSFKELLVYAADPAMHAASGNLLLDKRTTCFSVAA
LTNNVAFQTVKPGNFNKDFYDFAVSKGFFKEGSSVELKHFFFAQDGNAAISDYDYYRYNLPTMCDIRQLLFVVEVVDKYF
DCYDGGCINANQVIVNNLDKSAGFPFNKWGKARLYYDSMSYEDQDALFAYTKRNVIPTITQMNLKYAISAKNRARTVAGV
SICSTMTNRQFHQKLLKSIAATRGATVVIGTSKFYGGWHNMLKTVYSDVENPHLMGWDYPKCDRAMPNMLRIMASLVLAR
KHTTCCSLSHRFYRLANECAQVLSEMVMCGGSLYVKPGGTSSGDATTAYANSVFNICQAVTANVNALLSTDGNKIADKYV
RNLQHRLYECLYRNRDVDTDFVNEFYAYLRKHFSMMILSDDAVVCFNSTYASQGLVASIKNFKSVLYYQNNVFMSEAKCW
TETDLTKGPHEFCSQHTMLVKQGDDYVYLPYPDPSRILGAGCFVDDIVKTDGTLMIERFVSLAIDAYPLTKHPNQEYADV
FHLYLQYIRKLHDELTGHMLDMYSVMLTNDNTSRYWEPEFYEAMYTPHTVLQHHHHHHHHHH</string>
                    <external_references type="UNIPROTKB">P0DTD1</external_references>
                </sequence>
                <ec_number>2.7.7.48</ec_number>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="2">
                <name>Non-structural protein 8</name>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.021903047</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>AIASEFSSLPSYAAFATAQEAYEQAVANGDSEVVLKKLKKSLNVAKSEFDRDAAMQRKLEKMADQAMTQMYKQARSEDKR
AKVTSAMQTMLFTMLRKLDNDALNNIINNARDGCVPLNIIPLTTAAKLMVVIPDYNTYKNTCDGTTFTYASALWEIQQVV
DADSKIVQLSEISMDNSPNLAWPLIVTALRANSAVKLQ</string>
                    <external_references type="UNIPROTKB">P0DTD1</external_references>
                </sequence>
            </protein_or_peptide>
            <protein_or_peptide macromolecule_id="3">
                <name>Non-structural protein 7</name>
                <natural_source database="NCBI">
                    <organism ncbi="2697049">Severe acute respiratory syndrome coronavirus 2</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.009248804</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <recombinant_expression database="NCBI">
                    <recombinant_organism ncbi="469008">Escherichia coli BL21(DE3)</recombinant_organism>
                </recombinant_expression>
                <enantiomer>LEVO</enantiomer>
                <sequence>
                    <string>SKMSDVKCTSVVLLSVLQQLRVESSSKLWAQCVQLHNDILLAKDTTEAFEKMVSLLSVLLSMQGAVDINKLCEEMLDNRA
TLQ</string>
                    <external_references type="UNIPROTKB">P0DTD1</external_references>
                </sequence>
            </protein_or_peptide>
            <rna macromolecule_id="4">
                <name>RNA (31-MER)</name>
                <natural_source database="NCBI">
                    <organism ncbi="12110">Foot-and-mouth disease virus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.010038037</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>GGGAGAUGAAAGUCCACCUGUGUCGUCGAAA</string>
                </sequence>
            </rna>
            <rna macromolecule_id="5">
                <name>RNA (5'-R(*UP*GP*UP*UP*CP*GP*AP*CP*GP*AP*CP*AP*CP*A)-3')</name>
                <natural_source database="NCBI">
                    <organism ncbi="12110">Foot-and-mouth disease virus</organism>
                </natural_source>
                <molecular_weight>
                    <theoretical units="MDa">0.004446708</theoretical>
                </molecular_weight>
                <number_of_copies>1</number_of_copies>
                <sequence>
                    <string>UGUUCGACGACACA</string>
                </sequence>
            </rna>
            <ligand macromolecule_id="6">
                <name>ZINC ION</name>
                <molecular_weight>
                    <theoretical units="MDa">6.5409e-05</theoretical>
                </molecular_weight>
                <number_of_copies>2</number_of_copies>
                <formula>ZN</formula>
            </ligand>
        </macromolecule_list>
    </sample>
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            <method>singleParticle</method>
            <aggregation_state>particle</aggregation_state>
            <specimen_preparation_list>
                <single_particle_preparation preparation_id="1">
                    <concentration units="mg/mL">0.7</concentration>
                    <buffer>
                        <ph>7.5</ph>
                    </buffer>
                    <grid>
                        <model>Quantifoil R0.6/1</model>
                        <support_film film_type_id="1">
                            <film_material>CARBON</film_material>
                            <film_topology>HOLEY</film_topology>
                        </support_film>
                    </grid>
                    <vitrification>
                        <cryogen_name>ETHANE</cryogen_name>
                        <chamber_humidity units="percentage">100</chamber_humidity>
                        <chamber_temperature units="K">281</chamber_temperature>
                    </vitrification>
                    <details>This sample was mono disperse.</details>
                </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>
                    <c2_aperture_diameter units="µm">50.0</c2_aperture_diameter>
                    <nominal_cs units="mm">2.7</nominal_cs>
                    <nominal_defocus_min units="µm">1.0</nominal_defocus_min>
                    <calibrated_defocus_min units="µm">1.0</calibrated_defocus_min>
                    <nominal_defocus_max units="µm">2.0</nominal_defocus_max>
                    <calibrated_defocus_max units="µm">2.0</calibrated_defocus_max>
                    <nominal_magnification>165000.0</nominal_magnification>
                    <specimen_holder_model>FEI TITAN KRIOS AUTOGRID HOLDER</specimen_holder_model>
                    <cooling_holder_cryogen>NITROGEN</cooling_holder_cryogen>
                    <temperature>
                        <temperature_min units="K">78.5</temperature_min>
                        <temperature_max units="K">78.5</temperature_max>
                    </temperature>
                    <alignment_procedure>
                        <coma_free>
                            <residual_tilt units="mrad">10.0</residual_tilt>
                        </coma_free>
                    </alignment_procedure>
                    <specialist_optics>
                        <sph_aberration_corrector>None.</sph_aberration_corrector>
                        <chr_aberration_corrector>None</chr_aberration_corrector>
                        <energy_filter>
                            <name>GIF Bioquantum</name>
                            <slit_width units="eV">40</slit_width>
                        </energy_filter>
                    </specialist_optics>
                    <details>Preliminary grid screening was preformed manually.</details>
                    <image_recording_list>
                        <image_recording image_recording_id="1">
                            <film_or_detector_model>GATAN K2 QUANTUM (4k x 4k)</film_or_detector_model>
                            <detector_mode>SUPER-RESOLUTION</detector_mode>
                            <digitization_details>
                                <dimensions>
                                    <width units="pixel">3838</width>
                                    <height units="pixel">3710</height>
                                </dimensions>
                                <frames_per_image>2-40</frames_per_image>
                            </digitization_details>
                            <number_grids_imaged>2</number_grids_imaged>
                            <number_real_images>8494</number_real_images>
                            <average_exposure_time units="s">5.0</average_exposure_time>
                            <average_electron_dose_per_image units="e/Å^2">60.0</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>
                <details>The selected images were normalized.</details>
                <particle_selection>
                    <number_selected>1235162</number_selected>
                </particle_selection>
                <startup_model type_of_model="NONE">
                    <details>The startup models were generated automatically.</details>
                </startup_model>
                <final_reconstruction>
                    <resolution units="Å" res_type="BY AUTHOR">3.26</resolution>
                    <resolution_method>FSC 0.143 CUT-OFF</resolution_method>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2.9.1</version>
                        </software>
                    </software_list>
                    <number_images_used>119662</number_images_used>
                </final_reconstruction>
                <initial_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2.9.1</version>
                        </software>
                    </software_list>
                    <details>The initial angle assignment was generated by Ab-initio reconstruction.</details>
                </initial_angle_assignment>
                <final_angle_assignment>
                    <type>MAXIMUM LIKELIHOOD</type>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2.9.1</version>
                        </software>
                    </software_list>
                </final_angle_assignment>
                <final_three_d_classification>
                    <number_classes>5</number_classes>
                    <average_number_members_per_class>150696.0</average_number_members_per_class>
                    <software_list>
                        <software>
                            <name>cryoSPARC</name>
                            <version>2.9.1</version>
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                    <maximum>1.2693982</maximum>
                    <average>0.0013849521</average>
                    <std>0.16151194</std>
                </statistics>
                <pixel_spacing>
                    <x units="Å">0.82</x>
                    <y units="Å">0.82</y>
                    <z units="Å">0.82</z>
                </pixel_spacing>
                <contour_list>
                    <contour primary="true">
                        <source>AUTHOR</source>
                    </contour>
                </contour_list>
                <label>::::EMDATABANK.org::::EMD-30252::::</label>
            </half_map>
        </half_map_list>
    </interpretation>
</emd>
