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Basic information

Entry
Database: PDB / ID: 7c2k
TitleCOVID-19 RNA-dependent RNA polymerase pre-translocated catalytic complex
Components
  • (Non-structural protein ...Viral nonstructural protein) x 2
  • RNA (29-MER)
  • RNA (5'-R(*UP*GP*UP*UP*CP*GP*AP*CP*GP*AP*CP*AP*CP*AP*GP*G*(F86)P*G)-3')
  • RNA-directed RNA polymeraseRNA-dependent RNA polymerase
KeywordsVIRAL PROTEIN/RNA / COVID-19 / 2019-nCoV / SARS-CoV-2 / Virus / RdRp / nsp12 / nsp7 / nsp8 / RTC / cryo-EM / Viral protein / RNA polymerase / drug target / antiviral / pre-translocated catalytic complex / VIRAL PROTEIN-RNA complex
Function / homology
Function and homology information


Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / Transcription of SARS-CoV-2 sgRNAs / host cell endosome / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Translation of Replicase and Assembly of the Replication Transcription Complex / exoribonuclease activity / RNA phosphodiester bond hydrolysis, exonucleolytic / modulation by virus of host autophagy / mRNA methylation ...Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / Transcription of SARS-CoV-2 sgRNAs / host cell endosome / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Translation of Replicase and Assembly of the Replication Transcription Complex / exoribonuclease activity / RNA phosphodiester bond hydrolysis, exonucleolytic / modulation by virus of host autophagy / mRNA methylation / double membrane vesicle viral factory outer membrane / suppression by virus of host translation / ISG15-specific protease activity / host cell Golgi apparatus / Replication of the SARS-CoV-2 genome / suppression by virus of host type I interferon production / host cell endoplasmic reticulum / induction by virus of catabolism of host mRNA / SARS coronavirus main proteinase / cytoplasmic viral factory / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / G-quadruplex RNA binding / 3'-5'-exoribonuclease activity / suppression by virus of host ISG15-protein conjugation / suppression by virus of host toll-like receptor signaling pathway / host cell endoplasmic reticulum-Golgi intermediate compartment / protein K48-linked deubiquitination / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / transcription, RNA-templated / suppression by virus of host NF-kappaB cascade / modulation by virus of host protein ubiquitination / protein K63-linked deubiquitination / positive stranded viral RNA replication / protein autoprocessing / cysteine-type peptidase activity / mRNA (nucleoside-2'-O-)-methyltransferase activity / viral genome replication / suppression by virus of host TRAF activity / helicase activity / viral transcription / Transferases; Transferring one-carbon groups; Methyltransferases / ubiquitinyl hydrolase 1 / DNA helicase / methyltransferase activity / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / thiol-dependent deubiquitinase / DNA helicase activity / single-stranded RNA binding / host cell perinuclear region of cytoplasm / methylation / RNA helicase / induction by virus of host autophagy / RNA-directed RNA polymerase / endonuclease activity / cysteine-type endopeptidase activity / RNA-directed 5'-3' RNA polymerase activity / viral RNA genome replication / RNA helicase activity / suppression by virus of host type I interferon-mediated signaling pathway / viral protein processing / Hydrolases; Acting on ester bonds / transcription, DNA-templated / host cell cytoplasm / protein dimerization activity / protein homodimerization activity / zinc ion binding / integral component of membrane / ATP binding / identical protein binding / cytosol
Similarity search - Function
RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Nonstructural protein 14, betacoronavirus / Arterivirus Nsp11 N-terminal/coronavirus NSP15 middle (AV-Nsp11N/CoV-Nsp15M) domain profile. / Nidoviral uridylate-specific endoribonuclease (NendoU) domain profile. ...RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Nonstructural protein 14, betacoronavirus / Arterivirus Nsp11 N-terminal/coronavirus NSP15 middle (AV-Nsp11N/CoV-Nsp15M) domain profile. / Nidoviral uridylate-specific endoribonuclease (NendoU) domain profile. / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain profile. / Viral (Superfamily 1) RNA helicase / Nonstructural protein 15, N-terminal domain, alpha/beta-coronavirus / NSP15, NendoU domain, coronavirus / Nonstructural protein 13, 1B domain, coronavirus / Coronavirus replicase NSP15, middle domain / Non-structural protein NSP16, coronavirus-like / Non-structural protein 14, coronavirus / RNA polymerase, N-terminal, coronavirus / Non-structural protein NSP15, N-terminal domain superfamily, coronavirus / Non-structural protein NSP15, middle domain superfamily / Coronavirus replicase NSP15, N-terminal oligomerisation / Coronavirus replicase NSP15, N-terminal oligomerisation / Coronavirus replicase NSP15, middle domain / Coronavirus RNA-dependent RNA polymerase, N-terminal / Coronavirus proofreading exoribonuclease / Coronavirus 2'-O-methyltransferase / Nonstructural protein 13, zinc-binding domain, coronavirus-like / Coronaviridae zinc-binding (CV ZBD) domain profile. / Sarbecovirus Nsp3c-N domain profile. / Betacoronavirus replicase NSP3, N-terminal / Non-structural protein NSP3, SUD-N (Mac2) domain superfamily, betacoronavirus / Non-structural protein NSP1 superfamily, betacoronavirus / Non-structural protein NSP3, N-terminal, betacoronavirus / Betacoronavirus SUD-C domain / Non-structural protein 2, SARS-CoV-like / Polyprotein cleavage domain PL2pro superfamily, coronavirus / NendoU domain, nidovirus / Coronavirus replicase NSP15, uridylate-specific endoribonuclease / Endoribonuclease EndoU-like / Carbamoyl-phosphate synthase subdomain signature 2. / Betacoronavirus (BetaCoV) Nsp1 C-terminal domain profile. / DPUP/SUD, C-terminal, betacoronavirus / Betacoronavirus Nsp3c-M domain profile. / Betacoronavirus Nsp3c-C domain profile. / Betacoronavirus Nsp3e nucleic acid-binding (NAB) domain profile. / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / Betacoronavirus replicase NSP1 / Replicase polyprotein, nucleic acid-binding domain superfamily / Non-structural protein NSP3, SUD-M domain superfamily, betacoronavirus / Non-structural protein NSP3, SUD-M domain, betacoronavirus / Non-structural protein NSP1, betacoronavirus / Betacoronavirus single-stranded poly(A) binding domain / Coronavirus (CoV) Nsp1 globular domain profile. / Non-structural protein 6, betacoronavirus / Non-structural protein NSP3, nucleic acid-binding domain, betacoronavirus / Betacoronavirus nucleic acid-binding (NAB) / Non-structural protein NSP3A domain-like superfamily / Papain-like protease, N-terminal domain superfamily, coronavirus / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp8 cofactor domain profile. / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp7 cofactor domain profile. / Coronavirus (CoV) ExoN/MTase coactivator domain profile. / Coronavirus Nsp9 single-stranded RNA (ssRNA)-binding domain profile. / NSP3, first ubiquitin-like (Ubl) domain, coronavirus / Papain-like protease, thumb domain superfamily, coronavirus / Lipocalin signature. / Coronavirus Nsp3a Ubl domain profile. / Coronavirus Nsp3d Ubl domain profile. / Coronavirus Nsp4 C-terminal (Nsp4C) domain profile. / Coronavirus replicase NSP2, N-terminal / Nonstructural protein 2, N-terminal domain, coronavirus / NSP3, second ubiquitin-like (Ubl) domain, coronavirus / Non-structural protein 2, C-terminal domain, coronavirus / Coronavirus replicase NSP2, C-terminal / Papain-like viral protease, palm and finger domains, coronavirus / Coronavirus replicase NSP7 / Non-structural protein NSP7, coronavirus / Non-structural protein NSP7 superfamily, coronavirus / Peptidase family C16 domain profile. / Coronavirus replicase NSP8 / Coronavirus RNA synthesis protein NSP10 / Coronavirus replicase NSP4, C-terminal / Coronavirus papain-like peptidase / Coronavirus replicase NSP6 / Coronavirus endopeptidase C30 / Coronavirus replicase NSP3, C-terminal / Non-structural protein NSP8, coronavirus-like / Coronavirus replicase NSP4, N-terminal / Non-structural protein NSP8 superfamily, coronavirus / Peptidase C30, coronavirus / Coronavirus main protease (M-pro) domain profile. / Peptidase C16, coronavirus / Non-structural protein NSP9, coronavirus / Coronavirus replicase NSP4, N-terminal / RNA synthesis protein NSP10, coronavirus / Coronavirus replicase NSP3, C-terminal / RNA synthesis protein NSP10 superfamily, coronavirus / Non-structural protein NSP9 superfamily, coronavirus / Non-structural protein NSP4, C-terminal, coronavirus
Similarity search - Domain/homology
RNA (> 10) / RNA / Replicase polyprotein 1ab
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Foot-and-mouth disease virus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.93 Å
AuthorsWang, Q. / Gao, Y. / Ji, W. / Mu, A. / Rao, Z.
Funding support China, 7items
OrganizationGrant numberCountry
Ministry of Science and Technology (MoST, China)2017YFC0840300 China
Ministry of Science and Technology (MoST, China)2020YFA0707500 China
Ministry of Science and Technology (MoST, China)2018YFA0507200 China
Chinese Academy of SciencesXDB08020200 China
National Natural Science Foundation of China (NSFC)81520108019 China
National Natural Science Foundation of China (NSFC)813300237 China
National Natural Science Foundation of China (NSFC)32041007 China
CitationJournal: Cell / Year: 2020
Title: Structural Basis for RNA Replication by the SARS-CoV-2 Polymerase.
Authors: Quan Wang / Jiqin Wu / Haofeng Wang / Yan Gao / Qiaojie Liu / An Mu / Wenxin Ji / Liming Yan / Yan Zhu / Chen Zhu / Xiang Fang / Xiaobao Yang / Yucen Huang / Hailong Gao / Fengjiang Liu / Ji ...Authors: Quan Wang / Jiqin Wu / Haofeng Wang / Yan Gao / Qiaojie Liu / An Mu / Wenxin Ji / Liming Yan / Yan Zhu / Chen Zhu / Xiang Fang / Xiaobao Yang / Yucen Huang / Hailong Gao / Fengjiang Liu / Ji Ge / Qianqian Sun / Xiuna Yang / Wenqing Xu / Zhijie Liu / Haitao Yang / Zhiyong Lou / Biao Jiang / Luke W Guddat / Peng Gong / Zihe Rao /
Abstract: Nucleotide analog inhibitors, including broad-spectrum remdesivir and favipiravir, have shown promise in in vitro assays and some clinical studies for COVID-19 treatment, this despite an incomplete ...Nucleotide analog inhibitors, including broad-spectrum remdesivir and favipiravir, have shown promise in in vitro assays and some clinical studies for COVID-19 treatment, this despite an incomplete mechanistic understanding of the viral RNA-dependent RNA polymerase nsp12 drug interactions. Here, we examine the molecular basis of SARS-CoV-2 RNA replication by determining the cryo-EM structures of the stalled pre- and post- translocated polymerase complexes. Compared with the apo complex, the structures show notable structural rearrangements happening to nsp12 and its co-factors nsp7 and nsp8 to accommodate the nucleic acid, whereas there are highly conserved residues in nsp12, positioning the template and primer for an in-line attack on the incoming nucleotide. Furthermore, we investigate the inhibition mechanism of the triphosphate metabolite of remdesivir through structural and kinetic analyses. A transition model from the nsp7-nsp8 hexadecameric primase complex to the nsp12-nsp7-nsp8 polymerase complex is also proposed to provide clues for the understanding of the coronavirus transcription and replication machinery.
History
DepositionMay 7, 2020Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 3, 2020Provider: repository / Type: Initial release
Revision 1.1Jun 24, 2020Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name
Revision 1.2Aug 5, 2020Group: Database references / Derived calculations / Category: citation / struct_conn / struct_conn_type
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id / _struct_conn_type.id
Revision 1.3Mar 10, 2021Group: Structure summary / Category: chem_comp / entity_name_com / Item: _chem_comp.pdbx_synonyms / _entity_name_com.name

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Structure visualization

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Assembly

Deposited unit
A: RNA-directed RNA polymerase
B: Non-structural protein 8
C: Non-structural protein 7
D: Non-structural protein 8
F: RNA (29-MER)
G: RNA (5'-R(*UP*GP*UP*UP*CP*GP*AP*CP*GP*AP*CP*AP*CP*AP*GP*G*(F86)P*G)-3')
hetero molecules


Theoretical massNumber of molelcules
Total (without water)177,1288
Polymers176,9976
Non-polymers1312
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area16450 Å2
ΔGint-183 kcal/mol
Surface area54470 Å2

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Components

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Non-structural protein ... , 2 types, 3 molecules BDC

#2: Protein Non-structural protein 8 / NSP8-1 / nsp8


Mass: 22057.213 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P0DTD1
#3: Protein Non-structural protein 7 / NSP7


Mass: 9402.971 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P0DTD1

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RNA chain , 2 types, 2 molecules FG

#4: RNA chain RNA (29-MER)


Mass: 9293.521 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Foot-and-mouth disease virus
#5: RNA chain RNA (5'-R(*UP*GP*UP*UP*CP*GP*AP*CP*GP*AP*CP*AP*CP*AP*GP*G*(F86)P*G)-3')


Mass: 5835.554 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Foot-and-mouth disease virus

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Protein / Non-polymers , 2 types, 3 molecules A

#1: Protein RNA-directed RNA polymerase / RNA-dependent RNA polymerase / NSP12 / Pol / RdRp / Non-structural protein 12


Mass: 108350.703 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P0DTD1, RNA-directed RNA polymerase
#6: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Zn

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Details

Compound detailsIn this entry, H atom on O6 of F86 is dehydrated.
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: COVID-19 RNA-dependent RNA polymerase pre-translocated catalytic complex
Type: COMPLEX
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.
Entity ID: #1-#5 / Source: RECOMBINANT
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Source (recombinant)Organism: Escherichia coli BL21(DE3) (bacteria)
Buffer solutionpH: 7.5
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recording
IDImaging-IDElectron dose (e/Å2)Detector modeFilm or detector model
1160SUPER-RESOLUTIONGATAN K2 QUANTUM (4k x 4k)
2160GATAN K2 QUANTUM (4k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.16_3549: / Classification: refinement
EM software
IDNameCategory
4cryoSPARCCTF correction
10cryoSPARCinitial Euler assignment
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.93 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 214419 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00410970
ELECTRON MICROSCOPYf_angle_d0.54415031
ELECTRON MICROSCOPYf_dihedral_angle_d7.0046478
ELECTRON MICROSCOPYf_chiral_restr0.0421719
ELECTRON MICROSCOPYf_plane_restr0.0031805

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