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- EMDB-63619: Cryo-EM structure of 6:2 nsp15/dsRNA complex -

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Basic information

Entry
Database: EMDB / ID: EMD-63619
TitleCryo-EM structure of 6:2 nsp15/dsRNA complex
Map data
Sample
  • Complex: 6:2 nsp15/dsRNA
    • Protein or peptide: Uridylate-specific endoribonuclease nsp15
    • RNA: RNA (31-MER)
    • RNA: RNA (31-MER)
  • Ligand: COBALT (II) ION
KeywordsSARS-CoV-2 / nsp15 / RNA binding protein / RNA BINDING PROTEIN/RNA / RNA BINDING PROTEIN-RNA complex
Function / homology
Function and homology information


protein guanylyltransferase activity / RNA endonuclease activity producing 3'-phosphomonoesters, hydrolytic mechanism / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / mRNA guanylyltransferase activity / 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 / 5'-3' RNA helicase activity / Lyases; Phosphorus-oxygen lyases / mRNA guanylyltransferase activity / 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 / double membrane vesicle viral factory outer membrane / SARS coronavirus main proteinase / host cell endoplasmic reticulum-Golgi intermediate compartment / 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 / symbiont-mediated suppression of host toll-like receptor signaling pathway / G-quadruplex RNA binding / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / omega peptidase activity / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / SARS-CoV-2 modulates host translation machinery / host cell Golgi apparatus / symbiont-mediated suppression of host NF-kappaB cascade / DNA helicase / symbiont-mediated perturbation of host ubiquitin-like protein modification / 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 / lyase activity / single-stranded RNA binding / viral protein processing / host cell perinuclear region of cytoplasm / host cell endoplasmic reticulum membrane / RNA helicase / symbiont-mediated suppression of host type I interferon-mediated signaling pathway / copper ion binding / symbiont-mediated suppression of host gene expression / symbiont-mediated activation of host autophagy / viral translational frameshifting / 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
Similarity search - Function
RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 14, betacoronavirus / Coronavirus Nsp6 transmembrane protein profile. / Coronavirus Nsp4 ectodomain (4Ecto) profile. / 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. ...RNA-dependent RNA polymerase, SARS-CoV-like / Nonstructural protein 14, betacoronavirus / Coronavirus Nsp6 transmembrane protein profile. / Coronavirus Nsp4 ectodomain (4Ecto) profile. / 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 / Betacoronavirus single-stranded poly(A) binding domain / 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 / 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 / Carbamoyl-phosphate synthase subdomain signature 2. / Coronavirus replicase NSP2, N-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 Nsp3 ectodomain (3Ecto) profile.
Similarity search - Domain/homology
Replicase polyprotein 1ab
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 2.78 Å
AuthorsWang L / Li J / Zhu B / Wang X
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: To Be Published
Title: Coronavirus nsp15 is activated by Co2+ and Ni2+ while inhibited by Zn2+
Authors: Wang X / Li J / Wang L / Zhu B
History
DepositionMar 4, 2025-
Header (metadata) releaseFeb 11, 2026-
Map releaseFeb 11, 2026-
UpdateFeb 11, 2026-
Current statusFeb 11, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_63619.png

Downloads & links

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Map

FileDownload / File: emd_63619.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 400 pix.
= 336. Å		0.84 Å/pix.
x 400 pix.
= 336. Å		0.84 Å/pix.
x 400 pix.
= 336. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.84 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.131
Minimum - Maximum-1.0398244 - 1.6604075
Average (Standard dev.)0.00012643584 (±0.03445301)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 336.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_63619_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_63619_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : 6:2 nsp15/dsRNA

EntireName: 6:2 nsp15/dsRNA
Components
  • Complex: 6:2 nsp15/dsRNA
    • Protein or peptide: Uridylate-specific endoribonuclease nsp15
    • RNA: RNA (31-MER)
    • RNA: RNA (31-MER)
  • Ligand: COBALT (II) ION

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Supramolecule #1: 6:2 nsp15/dsRNA

SupramoleculeName: 6:2 nsp15/dsRNA / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2

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Macromolecule #1: Uridylate-specific endoribonuclease nsp15

MacromoleculeName: Uridylate-specific endoribonuclease nsp15 / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO / EC number: Lyases; Phosphorus-oxygen lyases
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 38.786145 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: SLENVAFNVV NKGHFDGQQG EVPVSIINNT VYTKVDGVDV ELFENKTTLP VNVAFELWAK RNIKPVPEVK ILNNLGVDIA ANTVIWDYK RDAPAHISTI GVCSMTDIAK KPTETICAPL TVFFDGRVDG QVDLFRNARN GVLITEGSVK GLQPSVGPKQ A SLNGVTLI ...String:
SLENVAFNVV NKGHFDGQQG EVPVSIINNT VYTKVDGVDV ELFENKTTLP VNVAFELWAK RNIKPVPEVK ILNNLGVDIA ANTVIWDYK RDAPAHISTI GVCSMTDIAK KPTETICAPL TVFFDGRVDG QVDLFRNARN GVLITEGSVK GLQPSVGPKQ A SLNGVTLI GEAVKTQFNY YKKVDGVVQQ LPETYFTQSR NLQEFKPRSQ MEIDFLELAM DEFIERYKLE GYAFEAIVYG DF SHSQLGG LHLLIGLAKR FKESPFELED FIPMDSTVKN YFITDAQTGS SKCVCSVIDL LLDDFVEIIK SQDLSVVSKV VKV TIDYTE ISFMLWCKDG HVETFYPKLQ

UniProtKB: Replicase polyprotein 1ab

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Macromolecule #2: RNA (31-MER)

MacromoleculeName: RNA (31-MER) / type: rna / ID: 2 / Number of copies: 2
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.853814 KDa
SequenceString:
UCAGUUAGUG ACUUAGAUAA AUUUUUAAUU A

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Macromolecule #3: RNA (31-MER)

MacromoleculeName: RNA (31-MER) / type: rna / ID: 3 / Number of copies: 2
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 9.842886 KDa
SequenceString:
UAAUUAAAAA UUUAUCUAAG UCACUAACUG A

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Macromolecule #4: COBALT (II) ION

MacromoleculeName: COBALT (II) ION / type: ligand / ID: 4 / Number of copies: 2 / Formula: CO
Molecular weightTheoretical: 58.933 Da

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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: 8
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.6 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

9m48

Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.78 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 117130
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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