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- EMDB-11692: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-dependent RNA polymerase in complex... -

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Basic information

Entry
Database: EMDB / ID: EMD-11692
TitleNsp7-Nsp8-Nsp12 SARS-CoV2 RNA-dependent RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP
Map dataMasked EM density map, sharpened by a B-factor of 20 Angstrom^2, used for model building
Sample
  • Complex: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP
    • Complex: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase
      • Protein or peptide: Non-structural protein 12
      • Protein or peptide: Non-structural protein 8
      • Protein or peptide: Non-structural protein 7
    • Complex: RNA
      • RNA: RNA (5'-R(P*UP*UP*AP*AP*GP*UP*UP*AP*U)-3')
      • RNA: RNA (5'-R(P*UP*UP*CP*AP*UP*AP*AP*CP*UP*UP*AP*A)-3')
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
  • Ligand: PYROPHOSPHATE 2-
  • Ligand: [[(2~{R},3~{S},4~{R},5~{R})-5-(3-aminocarbonyl-5-fluoranyl-2-oxidanylidene-pyrazin-1-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] phosphono hydrogen phosphate
KeywordsRNA-dependent RNA polymerase / Favipiravir / SARS-CoV2 / nCovid19 / VIRAL PROTEIN
Function / homology
Function and homology information


protein guanylyltransferase activity / RNA endonuclease activity, producing 3'-phosphomonoesters / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / ISG15-specific peptidase activity / Transcription of SARS-CoV-2 sgRNAs ...protein guanylyltransferase activity / RNA endonuclease activity, producing 3'-phosphomonoesters / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / ISG15-specific peptidase activity / Transcription of SARS-CoV-2 sgRNAs / TRAF3-dependent IRF activation pathway / Translation of Replicase and Assembly of the Replication Transcription Complex / Replication of the SARS-CoV-2 genome / snRNP Assembly / double membrane vesicle viral factory outer membrane / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / SARS coronavirus main proteinase / host cell endoplasmic reticulum-Golgi intermediate compartment / 3'-5'-RNA exonuclease activity / 5'-3' DNA helicase activity / symbiont-mediated suppression of host NF-kappaB cascade / host cell endosome / symbiont-mediated suppression of host toll-like receptor signaling pathway / symbiont-mediated degradation of host mRNA / mRNA guanylyltransferase / symbiont-mediated suppression of host ISG15-protein conjugation / G-quadruplex RNA binding / mRNA (guanine-N7)-methyltransferase / omega peptidase activity / methyltransferase cap1 / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / SARS-CoV-2 modulates host translation machinery / host cell Golgi apparatus / symbiont-mediated perturbation of host ubiquitin-like protein modification / DNA helicase / mRNA (nucleoside-2'-O-)-methyltransferase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / ubiquitinyl hydrolase 1 / cysteine-type deubiquitinase activity / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / host cell perinuclear region of cytoplasm / single-stranded RNA binding / host cell endoplasmic reticulum membrane / viral protein processing / lyase activity / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / induction by virus of host autophagy / copper ion binding / RNA-directed RNA polymerase / viral translational frameshifting / viral RNA genome replication / cysteine-type endopeptidase activity / RNA-dependent RNA polymerase activity / virus-mediated perturbation of host defense response / lipid binding / DNA-templated transcription / host cell nucleus / SARS-CoV-2 activates/modulates innate and adaptive immune responses / ATP hydrolysis activity / proteolysis / RNA binding / zinc ion binding / ATP binding / membrane
Similarity search - Function
RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 14, betacoronavirus / NSP15, NendoU domain, coronavirus / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nonstructural protein 15, N-terminal domain, alpha/beta-coronavirus / NSP14, guanine-N7-methyltransferase domain, coronavirus / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / NSP12 RNA-dependent RNA polymerase, coronavirus / : ...RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 14, betacoronavirus / NSP15, NendoU domain, coronavirus / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nonstructural protein 15, N-terminal domain, alpha/beta-coronavirus / NSP14, guanine-N7-methyltransferase domain, coronavirus / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / NSP12 RNA-dependent RNA polymerase, coronavirus / : / : / : / Coronavirus Nonstructural protein 13, 1B domain / Coronavirus Non-structural protein 13, zinc-binding domain / Coronavirus Nonstructural protein 13, stalk domain / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Coronavirus Nsp12 Interface domain profile. / Non-structural protein NSP15, N-terminal domain superfamily, coronavirus / Non-structural protein NSP15, middle domain superfamily / Coronavirus replicase NSP15, N-terminal oligomerization / Nonstructural protein 15, middle domain, coronavirus / Nonstructural protein 13, 1B domain, coronavirus / Nidovirus 2-O-methyltransferase / Coronavirus replicase NSP15, middle domain / Coronavirus replicase NSP15, N-terminal oligomerisation / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Non-structural protein NSP16, coronavirus-like / Non-structural protein 14, coronavirus / RNA polymerase, N-terminal, coronavirus / Nidovirus 3'-5' exoribonuclease domain / Coronavirus 2'-O-methyltransferase / Coronavirus proofreading exoribonuclease / Coronavirus RNA-dependent RNA polymerase, N-terminal / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Nonstructural protein 13, zinc-binding domain, coronavirus-like / Coronaviridae zinc-binding (CV ZBD) domain profile. / Arterivirus Nsp11 N-terminal/Coronavirus NSP15 middle domain / 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 / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain profile. / Endoribonuclease EndoU-like / NendoU domain, nidovirus / Coronavirus replicase NSP15, uridylate-specific endoribonuclease / : / Lipocalin signature. / DNA2/NAM7 helicase-like, C-terminal / AAA domain / Non-structural protein NSP3, SUD-N (Mac2) domain, betacoronavirus / Sarbecovirus Nsp3c-N domain profile. / Non-structural protein NSP3, N-terminal, betacoronavirus / Polyprotein cleavage domain PL2pro superfamily, betacoronavirus / Non-structural protein NSP3, SUD-N (Mac2) domain superfamily, betacoronavirus / Betacoronavirus SUD-C domain / Betacoronavirus replicase NSP3, N-terminal / NSP1 globular domain superfamily, betacoronavirus / Non-structural protein 2, SARS-CoV-like / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / Carbamoyl-phosphate synthase subdomain signature 2. / Betacoronavirus Nsp3c-M domain profile. / NSP1, globular domain, betacoronavirus / Non-structural protein NSP3, SUD-M domain, betacoronavirus / Non-structural protein NSP3, SUD-M domain superfamily, betacoronavirus / Betacoronavirus replicase NSP1 / Betacoronavirus single-stranded poly(A) binding domain / NSP1, C-terminal domain, betacoronavirus / : / Betacoronavirus (BetaCoV) Nsp1 C-terminal domain profile. / Betacoronavirus Nsp3e group 2-specific marker (G2M) domain profile. / Betacoronavirus Nsp3c-C domain profile. / Betacoronavirus Nsp3e nucleic acid-binding (NAB) domain profile. / DPUP/SUD, C-terminal, betacoronavirus / Non-structural protein NSP3, nucleic acid-binding domain, betacoronavirus / Non-structural protein NSP3A domain-like superfamily / Non-structural protein NSP3, nucleic acid-binding domain superfamily, betacoronavirus / Non-structural protein 6, betacoronavirus / Betacoronavirus nucleic acid-binding (NAB) / Papain-like viral protease, palm and finger domains, coronavirus / Papain-like protease, N-terminal domain superfamily, coronavirus / Coronavirus replicase NSP2, N-terminal / : / Coronavirus replicase NSP2, C-terminal / NSP1, globular domain, alpha/betacoronavirus / Coronavirus (CoV) Nsp2 middle domain profile. / Coronavirus (CoV) Nsp1 globular domain profile. / Coronavirus (CoV) Nsp2 N-terminal domain profile. / Coronavirus (CoV) Nsp2 C-terminal domain profile. / Nonstructural protein 2, N-terminal domain, coronavirus / Non-structural protein 2, C-terminal domain, coronavirus / NSP3, second ubiquitin-like (Ubl) domain, coronavirus / Coronavirus Nsp3a Ubl domain profile. / Coronavirus Nsp3d Ubl domain profile. / NSP3, first ubiquitin-like (Ubl) domain, coronavirus / : / : / Coronavirus replicase NSP7 / Peptidase family C16 domain profile. / Coronavirus 3Ecto domain profile. / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp7 cofactor domain profile.
Similarity search - Domain/homology
Replicase polyprotein 1ab
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsNaydenova K / Muir KW
Funding support United Kingdom, 6 items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC_UP_120117 United Kingdom
Medical Research Council (MRC, United Kingdom)U105184326 United Kingdom
Wellcome Trust202754/Z/16/Z United Kingdom
Medical Research Council (MRC, United Kingdom)MC_UP_A024_1009 United Kingdom
Medical Research Council (MRC, United Kingdom)MC_UP_1201/6 United Kingdom
Cancer Research UKC576/A14109 United Kingdom
CitationJournal: Proc Natl Acad Sci U S A / Year: 2021
Title: Structure of the SARS-CoV-2 RNA-dependent RNA polymerase in the presence of favipiravir-RTP.
Authors: Katerina Naydenova / Kyle W Muir / Long-Fei Wu / Ziguo Zhang / Francesca Coscia / Mathew J Peet / Pablo Castro-Hartmann / Pu Qian / Kasim Sader / Kyle Dent / Dari Kimanius / John D ...Authors: Katerina Naydenova / Kyle W Muir / Long-Fei Wu / Ziguo Zhang / Francesca Coscia / Mathew J Peet / Pablo Castro-Hartmann / Pu Qian / Kasim Sader / Kyle Dent / Dari Kimanius / John D Sutherland / Jan Löwe / David Barford / Christopher J Russo /
Abstract: The RNA polymerase inhibitor favipiravir is currently in clinical trials as a treatment for infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), despite limited information ...The RNA polymerase inhibitor favipiravir is currently in clinical trials as a treatment for infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), despite limited information about the molecular basis for its activity. Here we report the structure of favipiravir ribonucleoside triphosphate (favipiravir-RTP) in complex with the SARS-CoV-2 RNA-dependent RNA polymerase (RdRp) bound to a template:primer RNA duplex, determined by electron cryomicroscopy (cryoEM) to a resolution of 2.5 Å. The structure shows clear evidence for the inhibitor at the catalytic site of the enzyme, and resolves the conformation of key side chains and ions surrounding the binding pocket. Polymerase activity assays indicate that the inhibitor is weakly incorporated into the RNA primer strand, and suppresses RNA replication in the presence of natural nucleotides. The structure reveals an unusual, nonproductive binding mode of favipiravir-RTP at the catalytic site of SARS-CoV-2 RdRp, which explains its low rate of incorporation into the RNA primer strand. Together, these findings inform current and future efforts to develop polymerase inhibitors for SARS coronaviruses.
History
DepositionSep 4, 2020-
Header (metadata) releaseSep 23, 2020-
Map releaseSep 23, 2020-
UpdateJul 10, 2024-
Current statusJul 10, 2024Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.012
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  • Surface view colored by radius
  • Surface level: 0.012
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  • Surface view with fitted model
  • Atomic models: PDB-7aap
  • Surface level: 0.012
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_11692.png

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Map

FileDownload / File: emd_11692.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMasked EM density map, sharpened by a B-factor of 20 Angstrom^2, used for model building
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.65 Å/pix.
x 320 pix.
= 208. Å		0.65 Å/pix.
x 320 pix.
= 208. Å		0.65 Å/pix.
x 320 pix.
= 208. Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.65 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.01 / Movie #1: 0.012
Minimum - Maximum-0.047219016 - 0.11504151
Average (Standard dev.)0.00018596314 (±0.0031760929)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 208.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.650.650.65
M x/y/z320320320
origin x/y/z0.0000.0000.000
length x/y/z208.000208.000208.000
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ428428428
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS320320320
D min/max/mean-0.0470.1150.000

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Supplemental data

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Mask #1

Fileemd_11692_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Unsharpened EM density map

Fileemd_11692_additional.map
AnnotationUnsharpened EM density map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: EM density half map 1

Fileemd_11692_half_map_1.map
AnnotationEM density half map 1
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: EM density half map 2

Fileemd_11692_half_map_2.map
AnnotationEM density half map 2
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Sample components

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Entire : Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex ...

EntireName: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP
Components
  • Complex: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP
    • Complex: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase
      • Protein or peptide: Non-structural protein 12
      • Protein or peptide: Non-structural protein 8
      • Protein or peptide: Non-structural protein 7
    • Complex: RNA
      • RNA: RNA (5'-R(P*UP*UP*AP*AP*GP*UP*UP*AP*U)-3')
      • RNA: RNA (5'-R(P*UP*UP*CP*AP*UP*AP*AP*CP*UP*UP*AP*A)-3')
  • Ligand: ZINC ION
  • Ligand: MAGNESIUM ION
  • Ligand: PYROPHOSPHATE 2-
  • Ligand: [[(2~{R},3~{S},4~{R},5~{R})-5-(3-aminocarbonyl-5-fluoranyl-2-oxidanylidene-pyrazin-1-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] phosphono hydrogen phosphate

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Supramolecule #1: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex ...

SupramoleculeName: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5

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Supramolecule #2: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase

SupramoleculeName: Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-directed RNA polymerase / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#3
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #3: RNA

SupramoleculeName: RNA / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #4-#5
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Non-structural protein 12

MacromoleculeName: Non-structural protein 12 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: ubiquitinyl hydrolase 1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 110.521938 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: SADAQSFLNR VCGVSAARLT PCGTGTSTDV VYRAFDIYND KVAGFAKFLK TNCCRFQEKD EDDNLIDSYF VVKRHTFSNY QHEETIYNL LKDCPAVAKH DFFKFRIDGD MVPHISRQRL TKYTMADLVY ALRHFDEGNC DTLKEILVTY NCCDDDYFNK K DWYDFVEN ...String:
SADAQSFLNR VCGVSAARLT PCGTGTSTDV VYRAFDIYND KVAGFAKFLK TNCCRFQEKD EDDNLIDSYF VVKRHTFSNY QHEETIYNL LKDCPAVAKH DFFKFRIDGD MVPHISRQRL TKYTMADLVY ALRHFDEGNC DTLKEILVTY NCCDDDYFNK K DWYDFVEN PDILRVYANL GERVRQALLK TVQFCDAMRN AGIVGVLTLD NQDLNGNWYD FGDFIQTTPG SGVPVVDSYY SL LMPILTL TRALTAESHV DTDLTKPYIK WDLLKYDFTE ERLKLFDRYF KYWDQTYHPN CVNCLDDRCI LHCANFNVLF STV FPPTSF GPLVRKIFVD GVPFVVSTGY HFRELGVVHN QDVNLHSSRL SFKELLVYAA DPAMHAASGN LLLDKRTTCF SVAA LTNNV AFQTVKPGNF NKDFYDFAVS KGFFKEGSSV ELKHFFFAQD GNAAISDYDY YRYNLPTMCD IRQLLFVVEV VDKYF DCYD GGCINANQVI VNNLDKSAGF PFNKWGKARL YYDSMSYEDQ DALFAYTKRN VIPTITQMNL KYAISAKNRA RTVAGV SIC STMTNRQFHQ KLLKSIAATR GATVVIGTSK FYGGWHNMLK TVYSDVENPH LMGWDYPKCD RAMPNMLRIM ASLVLAR KH TTCCSLSHRF YRLANECAQV LSEMVMCGGS LYVKPGGTSS GDATTAYANS VFNICQAVTA NVNALLSTDG NKIADKYV R NLQHRLYECL YRNRDVDTDF VNEFYAYLRK HFSMMILSDD AVVCFNSTYA SQGLVASIKN FKSVLYYQNN VFMSEAKCW TETDLTKGPH EFCSQHTMLV KQGDDYVYLP YPDPSRILGA GCFVDDIVKT DGTLMIERFV SLAIDAYPLT KHPNQEYADV FHLYLQYIR KLHDELTGHM LDMYSVMLTN DNTSRYWEPE FYEAMYTPHT VLQENLYFQS WSHPQFEKGG GSGGGSGGGS W SHPQFEK

UniProtKB: Replicase polyprotein 1ab

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Macromolecule #2: Non-structural protein 8

MacromoleculeName: Non-structural protein 8 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO / EC number: ubiquitinyl hydrolase 1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 21.903047 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: AIASEFSSLP SYAAFATAQE AYEQAVANGD SEVVLKKLKK SLNVAKSEFD RDAAMQRKLE KMADQAMTQM YKQARSEDKR AKVTSAMQT MLFTMLRKLD NDALNNIINN ARDGCVPLNI IPLTTAAKLM VVIPDYNTYK NTCDGTTFTY ASALWEIQQV V DADSKIVQ ...String:
AIASEFSSLP SYAAFATAQE AYEQAVANGD SEVVLKKLKK SLNVAKSEFD RDAAMQRKLE KMADQAMTQM YKQARSEDKR AKVTSAMQT MLFTMLRKLD NDALNNIINN ARDGCVPLNI IPLTTAAKLM VVIPDYNTYK NTCDGTTFTY ASALWEIQQV V DADSKIVQ LSEISMDNSP NLAWPLIVTA LRANSAVKLQ

UniProtKB: Replicase polyprotein 1ab

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Macromolecule #3: Non-structural protein 7

MacromoleculeName: Non-structural protein 7 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: ubiquitinyl hydrolase 1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.248804 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString:
SKMSDVKCTS VVLLSVLQQL RVESSSKLWA QCVQLHNDIL LAKDTTEAFE KMVSLLSVLL SMQGAVDINK LCEEMLDNRA TLQ

UniProtKB: Replicase polyprotein 1ab

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Macromolecule #4: RNA (5'-R(P*UP*UP*AP*AP*GP*UP*UP*AP*U)-3')

MacromoleculeName: RNA (5'-R(P*UP*UP*AP*AP*GP*UP*UP*AP*U)-3') / type: rna / ID: 4 / Number of copies: 1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 7.696575 KDa
SequenceString:
CAGUGCUAUG UGAGAUUAAG UUAU

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Macromolecule #5: RNA (5'-R(P*UP*UP*CP*AP*UP*AP*AP*CP*UP*UP*AP*A)-3')

MacromoleculeName: RNA (5'-R(P*UP*UP*CP*AP*UP*AP*AP*CP*UP*UP*AP*A)-3') / type: rna / ID: 5 / Number of copies: 1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.418569 KDa
SequenceString:
UUUUUCAUAA CUUAAUCUCA CAUAGCACUG

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Macromolecule #6: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 6 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #7: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 7 / Number of copies: 3 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #8: PYROPHOSPHATE 2-

MacromoleculeName: PYROPHOSPHATE 2- / type: ligand / ID: 8 / Number of copies: 1 / Formula: POP
Molecular weightTheoretical: 175.959 Da
Chemical component information

ChemComp-POP:
PYROPHOSPHATE 2-

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Macromolecule #9: [[(2~{R},3~{S},4~{R},5~{R})-5-(3-aminocarbonyl-5-fluoranyl-2-oxid...

MacromoleculeName: [[(2~{R},3~{S},4~{R},5~{R})-5-(3-aminocarbonyl-5-fluoranyl-2-oxidanylidene-pyrazin-1-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] phosphono hydrogen phosphate
type: ligand / ID: 9 / Number of copies: 1 / Formula: GE6
Molecular weightTheoretical: 529.157 Da
Chemical component information

ChemComp-GE6:
[[(2~{R},3~{S},4~{R},5~{R})-5-(3-aminocarbonyl-5-fluoranyl-2-oxidanylidene-pyrazin-1-yl)-3,4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl] phosphono hydrogen phosphate

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 24.72 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: EMDB MAP
Details: The structure was determined by molecular replacement using 7BV2. Thereafter, the model was manually corrected in Coot and refined in Phenix, using real-space refinement.
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 40828
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7bv2


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL
Output model

PDB-7aap:
Nsp7-Nsp8-Nsp12 SARS-CoV2 RNA-dependent RNA polymerase in complex with template:primer dsRNA and favipiravir-RTP

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