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- EMDB-72053: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP -

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Basic information

Entry
Database: EMDB / ID: EMD-72053
TitleSARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP
Map data
Sample
  • Complex: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP
    • Complex: nsp12 RNA-dependent RNA polymerase
      • Protein or peptide: RNA-directed RNA polymerase nsp12
    • Complex: Replication co-factors of RNA-dependent RNA polymerase
      • Protein or peptide: Non-structural protein 8
      • Protein or peptide: Non-structural protein 7
    • Complex: RNA
      • RNA: Primer RNA
      • RNA: Template RNA
  • Ligand: MAGNESIUM ION
  • Ligand: ZINC ION
  • Ligand: URIDINE 5'-TRIPHOSPHATE
KeywordsRNA-dependent RNA polymerase (RdRp) / Viral RNA synthesis / arabinose UTP / Uridine triphosphate / nsp7 / nsp8 / nsp12 / VIRAL PROTEIN
Function / homology
Function and homology information


protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Maturation of replicase proteins / TRAF3-dependent IRF activation pathway / ISG15-specific peptidase activity ...protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / mRNA guanylyltransferase activity / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / Maturation of replicase proteins / TRAF3-dependent IRF activation pathway / ISG15-specific peptidase activity / Transcription of SARS-CoV-2 sgRNAs / snRNP Assembly / Translation of Replicase and Assembly of the Replication Transcription Complex / Replication of the SARS-CoV-2 genome / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / host cell endoplasmic reticulum-Golgi intermediate compartment / double membrane vesicle viral factory outer membrane / SARS coronavirus main proteinase / 5'-3' DNA helicase activity / 3'-5'-RNA exonuclease activity / host cell endosome / symbiont-mediated degradation of host mRNA / mRNA guanylyltransferase / symbiont-mediated suppression of host ISG15-protein conjugation / G-quadruplex RNA binding / symbiont-mediated suppression of host toll-like receptor signaling pathway / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / omega peptidase activity / SARS-CoV-2 modulates host translation machinery / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / host cell Golgi apparatus / symbiont-mediated suppression of host NF-kappaB cascade / symbiont-mediated perturbation of host ubiquitin-like protein modification / DNA helicase / methyltransferase cap1 activity / ubiquitinyl hydrolase 1 / cysteine-type deubiquitinase activity / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / single-stranded RNA binding / regulation of autophagy / host cell perinuclear region of cytoplasm / viral protein processing / lyase activity / host cell endoplasmic reticulum membrane / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / symbiont-mediated suppression of host gene expression / copper ion binding / viral translational frameshifting / symbiont-mediated activation of host autophagy / RNA-directed RNA polymerase / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed RNA polymerase activity / DNA-templated transcription / lipid binding / 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 Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Coronavirus Nsp12 Interface domain profile. / : / : / Coronavirus Nonstructural protein 13, 1B domain / Coronavirus Non-structural protein 13, zinc-binding domain / Coronavirus Nonstructural protein 13, stalk domain / Nidovirus 2-O-methyltransferase / Nidovirus 2'-O-methyltransferase (2'-O-MTase) 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 / Coronavirus replicase NSP15, middle domain / Coronavirus replicase NSP15, N-terminal oligomerisation / Nidovirus 3'-5' exoribonuclease domain / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Non-structural protein NSP16, coronavirus-like / Non-structural protein 14, coronavirus / RNA polymerase, N-terminal, coronavirus / Coronavirus 2'-O-methyltransferase / Coronavirus proofreading exoribonuclease / Coronavirus RNA-dependent RNA polymerase, N-terminal / 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 / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / 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 / 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 / Coronavirus (CoV) Nsp2 middle domain profile. / NSP1, globular domain, alpha/betacoronavirus / 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 / Peptidase family C16 domain profile. / : / : / Coronavirus replicase NSP7 / 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 / synthetic construct (others)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsXiao Z / Kirchdeorfer RN
Funding support United States, 2 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI158463 United States
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI171292 United States
CitationJournal: bioRxiv / Year: 2025
Title: The 2'-endo conformation of arabinose-CTP and arabinose-UTP inhibit viral polymerases by inducing long pauses.
Authors: Ziyang Xiao / Arnab Das / Abha Jain / Thomas K Anderson / Craig E Cameron / Jamie J Arnold / David Dulin / Robert N Kirchdoerfer /
Abstract: Key to supporting human health in the face of evolving viruses is the development of novel antiviral drug scaffolds with the potential for broad inhibition of viral families. Nucleoside analogs are a ...Key to supporting human health in the face of evolving viruses is the development of novel antiviral drug scaffolds with the potential for broad inhibition of viral families. Nucleoside analogs are a key class of drugs that have demonstrated potential for the inhibition of several viral species. Here, we evaluate arabinose nucleotides (ara-NTP) as inhibitors of the SARS-CoV-2 and poliovirus polymerases using biochemistry, biophysics and structural biology. Ara-NTPs compete poorly with their natural counterparts for incorporation into RNA by viral polymerases. However, upon incorporation, ara-NMPs induce long polymerase pausing in both SARS-CoV-2 and poliovirus polymerase RNA elongation. Our studies suggest that subsequent nucleotide incorporation is inhibited at the catalytic step due to the 2'-endo sugar pucker of the incorporated ara-NMP.
History
DepositionAug 8, 2025-
Header (metadata) releaseSep 17, 2025-
Map releaseSep 17, 2025-
UpdateSep 17, 2025-
Current statusSep 17, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_72053.png

Downloads & links

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Map

FileDownload / File: emd_72053.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
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AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 256 pix.
= 272.384 Å		1.06 Å/pix.
x 256 pix.
= 272.384 Å		1.06 Å/pix.
x 256 pix.
= 272.384 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 1.064 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-2.8311005 - 3.7511096
Average (Standard dev.)0.0016883924 (±0.07973718)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 272.384 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_72053_msk_1.map
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Half map: #2

Fileemd_72053_half_map_1.map
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Half map: #1

Fileemd_72053_half_map_2.map
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Sample components

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Entire : SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP

EntireName: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP
Components
  • Complex: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP
    • Complex: nsp12 RNA-dependent RNA polymerase
      • Protein or peptide: RNA-directed RNA polymerase nsp12
    • Complex: Replication co-factors of RNA-dependent RNA polymerase
      • Protein or peptide: Non-structural protein 8
      • Protein or peptide: Non-structural protein 7
    • Complex: RNA
      • RNA: Primer RNA
      • RNA: Template RNA
  • Ligand: MAGNESIUM ION
  • Ligand: ZINC ION
  • Ligand: URIDINE 5'-TRIPHOSPHATE

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Supramolecule #1: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP

SupramoleculeName: SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#5
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #2: nsp12 RNA-dependent RNA polymerase

SupramoleculeName: nsp12 RNA-dependent RNA polymerase / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #3: Replication co-factors of RNA-dependent RNA polymerase

SupramoleculeName: Replication co-factors of RNA-dependent RNA polymerase
type: complex / ID: 3 / Parent: 1 / Macromolecule list: #2-#3
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Supramolecule #4: RNA

SupramoleculeName: RNA / type: complex / ID: 4 / Parent: 1 / Macromolecule list: #4-#5
Source (natural)Organism: synthetic construct (others)

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Macromolecule #1: RNA-directed RNA polymerase nsp12

MacromoleculeName: RNA-directed RNA polymerase nsp12 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: RNA-directed RNA polymerase
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 110.424898 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: MGSADAQSFL NRVCGVSAAR LTPCGTGTST DVVYRAFDIY NDKVAGFAKF LKTNCCRFQE KDEDDNLIDS YFVVKRHTFS NYQHEETIY NLLKDCPAVA KHDFFKFRID GDMVPHISRQ RLTKYTMADL VYALRHFDEG NCDTLKEILV TYNCCDDDYF N KKDWYDFV ...String:
MGSADAQSFL NRVCGVSAAR LTPCGTGTST DVVYRAFDIY NDKVAGFAKF LKTNCCRFQE KDEDDNLIDS YFVVKRHTFS NYQHEETIY NLLKDCPAVA KHDFFKFRID GDMVPHISRQ RLTKYTMADL VYALRHFDEG NCDTLKEILV TYNCCDDDYF N KKDWYDFV ENPDILRVYA NLGERVRQAL LKTVQFCDAM RNAGIVGVLT LDNQDLNGNW YDFGDFIQTT PGSGVPVVDS YY SLLMPIL TLTRALTAES HVDTDLTKPY IKWDLLKYDF TEERLKLFDR YFKYWDQTYH PNCVNCLDDR CILHCANFNV LFS TVFPPT SFGPLVRKIF VDGVPFVVST GYHFRELGVV HNQDVNLHSS RLSFKELLVY AADPAMHAAS GNLLLDKRTT CFSV AALTN NVAFQTVKPG NFNKDFYDFA VSKGFFKEGS SVELKHFFFA QDGNAAISDY DYYRYNLPTM CDIRQLLFVV EVVDK YFDC YDGGCINANQ VIVNNLDKSA GFPFNKWGKA RLYYDSMSYE DQDALFAYTK RNVIPTITQM NLKYAISAKN RARTVA GVS ICSTMTNRQF HQKLLKSIAA TRGATVVIGT SKFYGGWHNM LKTVYSDVEN PHLMGWDYPK CDRAMPNMLR IMASLVL AR KHTTCCSLSH RFYRLANECA QVLSEMVMCG GSLYVKPGGT SSGDATTAYA NSVFNICQAV TANVNALLST DGNKIADK Y VRNLQHRLYE CLYRNRDVDT DFVNEFYAYL RKHFSMMILS DDAVVCFNST YASQGLVASI KNFKSVLYYQ NNVFMSEAK CWTETDLTKG PHEFCSQHTM LVKQGDDYVY LPYPDPSRIL GAGCFVDDIV KTDGTLMIER FVSLAIDAYP LTKHPNQEYA DVFHLYLQY IRKLHDELTG HMLDMYSVML TNDNTSRYWE PEFYEAMYTP HTVLQENLYF QGSWSHPQFE KGGSGSSWSH P QFEK

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
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 21.9601 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString: GAIASEFSSL PSYAAFATAQ EAYEQAVANG DSEVVLKKLK KSLNVAKSEF DRDAAMQRKL EKMADQAMTQ MYKQARSEDK RAKVTSAMQ TMLFTMLRKL DNDALNNIIN NARDGCVPLN IIPLTTAAKL MVVIPDYNTY KNTCDGTTFT YASALWEIQQ V VDADSKIV ...String:
GAIASEFSSL PSYAAFATAQ EAYEQAVANG DSEVVLKKLK KSLNVAKSEF DRDAAMQRKL EKMADQAMTQ MYKQARSEDK RAKVTSAMQ TMLFTMLRKL DNDALNNIIN NARDGCVPLN IIPLTTAAKL MVVIPDYNTY KNTCDGTTFT YASALWEIQQ V VDADSKIV QLSEISMDNS PNLAWPLIVT ALRANSAVKL Q

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
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.305855 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
GSKMSDVKCT SVVLLSVLQQ LRVESSSKLW AQCVQLHNDI LLAKDTTEAF EKMVSLLSVL LSMQGAVDIN KLCEEMLDNR ATLQ

UniProtKB: Replicase polyprotein 1ab

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Macromolecule #4: Primer RNA

MacromoleculeName: Primer RNA / type: rna / ID: 4 / Number of copies: 1
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 9.487689 KDa
SequenceString:
CAUUCUCCUA AGAAGCUAUU AAAAUCACA(UAR)

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Macromolecule #5: Template RNA

MacromoleculeName: Template RNA / type: rna / ID: 5 / Number of copies: 1
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 12.088101 KDa
SequenceString:
UUUUCCCAAU GUGAUUUUAA UAGCUUCUUA GGAGAAUG

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Macromolecule #6: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 6 / Number of copies: 2 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #7: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 7 / Number of copies: 2 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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Macromolecule #8: URIDINE 5'-TRIPHOSPHATE

MacromoleculeName: URIDINE 5'-TRIPHOSPHATE / type: ligand / ID: 8 / Number of copies: 1 / Formula: UTP
Molecular weightTheoretical: 484.141 Da
Chemical component information

ChemComp-UTP:
URIDINE 5'-TRIPHOSPHATE / UTP*YM

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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

Concentration8 mg/mL
BufferpH: 8
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 30 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TALOS ARCTICA
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV
SoftwareName: EPU (ver. 3.6.0.6389)
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Number grids imaged: 1 / Number real images: 4501 / Average exposure time: 4.52 sec. / Average electron dose: 55.0 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

CTF correctionType: NONE
Startup modelType of model: NONE
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC (ver. v4.5.3) / Number images used: 775227
Initial angle assignmentType: RANDOM ASSIGNMENT
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

9blf


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

PDB-9pyz:
SARS-CoV-2 core polymerase complex bound to RNA, araUMP, and UTP

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