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- PDB-7k0r: Nucleotide bound SARS-CoV-2 Nsp15 -

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Basic information

Entry
Database: PDB / ID: 7k0r
TitleNucleotide bound SARS-CoV-2 Nsp15
ComponentsUridylate-specific endoribonuclease
KeywordsVIRAL PROTEIN / Ribonuclease
Function / homology
Function and homology information


Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / exoribonuclease complex / viral RNA-directed RNA polymerase complex / endoribonuclease complex / Transcription of SARS-CoV-2 sgRNAs / endopeptidase complex / 5'-3' RNA helicase activity / mRNA cap methyltransferase complex ...Assembly of the SARS-CoV-2 Replication-Transcription Complex (RTC) / Maturation of replicase proteins / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of TBK1 activity / exoribonuclease complex / viral RNA-directed RNA polymerase complex / endoribonuclease complex / Transcription of SARS-CoV-2 sgRNAs / endopeptidase complex / 5'-3' RNA helicase activity / mRNA cap methyltransferase complex / RNA phosphodiester bond hydrolysis, exonucleolytic / Translation of Replicase and Assembly of the Replication Transcription Complex / Replication of the SARS-CoV-2 genome / positive regulation of RNA biosynthetic process / modulation by virus of host autophagy / Lyases; Phosphorus-oxygen lyases / mRNA methylation / double membrane vesicle viral factory outer membrane / suppression by virus of host translation / ISG15-specific peptidase activity / SARS coronavirus main proteinase / suppression by virus of host type I interferon production / Hydrolases; Acting on ester bonds; Exoribonucleases producing 5'-phosphomonoesters / host cell endosome / 3'-5'-exoribonuclease activity / host cell endoplasmic reticulum-Golgi intermediate compartment / induction by virus of catabolism of host mRNA / cytoplasmic viral factory / protein K48-linked deubiquitination / G-quadruplex RNA binding / suppression by virus of host ISG15-protein conjugation / 7-methylguanosine mRNA capping / transcription, RNA-templated / viral transcription / suppression by virus of host viral-induced cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / suppression by virus of host toll-like receptor signaling pathway / host cell Golgi apparatus / host cell endoplasmic reticulum / suppression by virus of host NF-kappaB cascade / modulation by virus of host protein ubiquitination / protein K63-linked deubiquitination / methyltransferase cap1 / positive regulation of viral genome replication / mRNA (nucleoside-2'-O-)-methyltransferase activity / positive stranded viral RNA replication / suppression by virus of host TRAF activity / protein autoprocessing / cysteine-type peptidase activity / helicase activity / ubiquitinyl hydrolase 1 / DNA helicase / DNA helicase activity / cysteine-type deubiquitinase activity / single-stranded RNA binding / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / protein processing / host cell perinuclear region of cytoplasm / viral protein processing / RNA helicase / lyase activity / induction by virus of host autophagy / RNA-directed RNA polymerase / suppression by virus of host gene expression / endonuclease activity / cysteine-type endopeptidase activity / viral RNA genome replication / RNA-directed 5'-3' RNA polymerase activity / transcription, DNA-templated / suppression by virus of host type I interferon-mediated signaling pathway / host cell cytoplasm / protein dimerization activity / host cell nucleus / ATP hydrolysis 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 14, betacoronavirus / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / 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 14, betacoronavirus / Coronavirus (CoV) Nsp15 N-terminal oligomerization domain profile. / Nonstructural protein 15, middle domain, alpha/betacoronavirus / Nidovirus 2'-O-methyltransferase (2'-O-MTase) domain profile. / Coronavirus (CoV) guanine-N7-methyltransferase (N7-MTase) domain profile. / Nidovirus 3'-5' exoribonuclease (ExoN) domain profile. / Coronavirus Nsp12 RNA-dependent RNA polymerase (RdRp) domain profile. / Arterivirus Nsp11 N-terminal/coronavirus NSP15 middle (AV-Nsp11N/CoV-Nsp15M) domain profile. / Nidoviral uridylate-specific endoribonuclease (NendoU) 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 / Nonstructural protein 15, middle domain, coronavirus / Coronavirus replicase NSP15, N-terminal oligomerisation / Non-structural protein NSP15, middle domain superfamily / Non-structural protein NSP15, N-terminal domain superfamily, coronavirus / Coronavirus proofreading exoribonuclease / Coronavirus RNA-dependent RNA polymerase, N-terminal / Coronavirus replicase NSP15, middle domain / Coronavirus 2'-O-methyltransferase / Non-structural protein NSP16, coronavirus-like / Non-structural protein 14, coronavirus / RNA polymerase, N-terminal, coronavirus / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain / Coronavirus replicase NSP15, N-terminal oligomerisation / Nonstructural protein 13, zinc-binding domain, coronavirus-like / Coronaviridae zinc-binding (CV ZBD) domain profile. / Nidovirus RdRp-associated nucleotidyl transferase (NiRAN) domain profile. / Coronavirus replicase NSP15, uridylate-specific endoribonuclease / NendoU domain, nidovirus / Endoribonuclease EndoU-like / Sarbecovirus Nsp3c-N domain profile. / Non-structural protein NSP3, SUD-N (Mac2) domain, betacoronavirus / Non-structural protein NSP3, N-terminal, betacoronavirus / Non-structural protein NSP3, SUD-N (Mac2) domain superfamily, betacoronavirus / Non-structural protein 2, SARS-CoV-like / Polyprotein cleavage domain PL2pro superfamily, betacoronavirus / Non-structural protein NSP1 superfamily, betacoronavirus / Betacoronavirus replicase NSP3, N-terminal / Betacoronavirus SUD-C domain / (+) RNA virus helicase core domain / (+)RNA virus helicase core domain profile. / Carbamoyl-phosphate synthase subdomain signature 2. / Betacoronavirus (BetaCoV) Nsp1 C-terminal domain profile. / Lipocalin signature. / Coronavirus (CoV) Nsp1 globular domain profile. / Betacoronavirus Nsp3c-M domain profile. / Non-structural protein NSP3, SUD-M domain superfamily, betacoronavirus / Betacoronavirus single-stranded poly(A) binding domain / Non-structural protein NSP3, SUD-M domain, betacoronavirus / Non-structural protein NSP1, betacoronavirus / Betacoronavirus replicase NSP1 / Betacoronavirus Nsp3e nucleic acid-binding (NAB) domain profile. / Betacoronavirus Nsp3c-C domain profile. / Coronavirus (CoV) ExoN/MTase coactivator domain profile. / Coronavirus Nsp9 single-stranded RNA (ssRNA)-binding domain profile. / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp8 cofactor domain profile. / DPUP/SUD, C-terminal, betacoronavirus / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp7 cofactor domain profile. / Non-structural protein 6, betacoronavirus / Non-structural protein NSP3, nucleic acid-binding domain superfamily, betacoronavirus / Betacoronavirus nucleic acid-binding (NAB) / Non-structural protein NSP3A domain-like superfamily / Non-structural protein NSP3, nucleic acid-binding domain, betacoronavirus / Papain-like protease, N-terminal domain superfamily, coronavirus / Papain-like viral protease, palm and finger domains, coronavirus / Coronavirus replicase NSP2, N-terminal / Nonstructural protein 2, N-terminal domain, coronavirus / Coronavirus replicase NSP2, C-terminal / Non-structural protein 2, C-terminal domain, coronavirus / Coronavirus Nsp3d Ubl domain profile. / Coronavirus Nsp3a Ubl domain profile. / NSP3, first ubiquitin-like (Ubl) domain, coronavirus / Coronavirus Nsp4 C-terminal (Nsp4C) domain profile. / NSP3, second ubiquitin-like (Ubl) domain, coronavirus / Papain-like protease, thumb domain superfamily, coronavirus / Non-structural protein NSP7, coronavirus / Peptidase family C16 domain profile. / Coronavirus replicase NSP7 / Coronavirus replicase NSP4, C-terminal / Coronavirus replicase NSP4, N-terminal / Coronavirus replicase NSP3, C-terminal / Coronavirus RNA synthesis protein NSP10 / Coronavirus replicase NSP8 / Coronavirus endopeptidase C30 / Coronavirus papain-like peptidase / Coronavirus main protease (M-pro) domain profile. / Non-structural protein NSP4, N-terminal, coronavirus / Coronavirus replicase NSP6 / Coronavirus replicase NSP3, C-terminal / Non-structural protein NSP7 superfamily, coronavirus / Non-structural protein 6, coronavirus / Non-structural protein NSP4, C-terminal, coronavirus / Peptidase C30, coronavirus / Peptidase C16, coronavirus / Non-structural protein NSP9, coronavirus / Non-structural protein NSP8, coronavirus / RNA synthesis protein NSP10, coronavirus
Similarity search - Domain/homology
PHOSPHATE ION / URIDINE-5'-MONOPHOSPHATE / Replicase polyprotein 1ab
Similarity search - Component
Biological speciesSevere acute respiratory syndrome coronavirus 2
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsPillon, M.C. / Stanley, R.E.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Environmental Health Sciences (NIH/NIEHS) United States
CitationJournal: Nat Commun / Year: 2021
Title: Cryo-EM structures of the SARS-CoV-2 endoribonuclease Nsp15 reveal insight into nuclease specificity and dynamics.
Authors: Monica C Pillon / Meredith N Frazier / Lucas B Dillard / Jason G Williams / Seda Kocaman / Juno M Krahn / Lalith Perera / Cassandra K Hayne / Jacob Gordon / Zachary D Stewart / Mack Sobhany ...Authors: Monica C Pillon / Meredith N Frazier / Lucas B Dillard / Jason G Williams / Seda Kocaman / Juno M Krahn / Lalith Perera / Cassandra K Hayne / Jacob Gordon / Zachary D Stewart / Mack Sobhany / Leesa J Deterding / Allen L Hsu / Venkata P Dandey / Mario J Borgnia / Robin E Stanley /
Abstract: Nsp15, a uridine specific endoribonuclease conserved across coronaviruses, processes viral RNA to evade detection by host defense systems. Crystal structures of Nsp15 from different coronaviruses ...Nsp15, a uridine specific endoribonuclease conserved across coronaviruses, processes viral RNA to evade detection by host defense systems. Crystal structures of Nsp15 from different coronaviruses have shown a common hexameric assembly, yet how the enzyme recognizes and processes RNA remains poorly understood. Here we report a series of cryo-EM reconstructions of SARS-CoV-2 Nsp15, in both apo and UTP-bound states. The cryo-EM reconstructions, combined with biochemistry, mass spectrometry, and molecular dynamics, expose molecular details of how critical active site residues recognize uridine and facilitate catalysis of the phosphodiester bond. Mass spectrometry revealed the accumulation of cyclic phosphate cleavage products, while analysis of the apo and UTP-bound datasets revealed conformational dynamics not observed by crystal structures that are likely important to facilitate substrate recognition and regulate nuclease activity. Collectively, these findings advance understanding of how Nsp15 processes viral RNA and provide a structural framework for the development of new therapeutics.
History
DepositionSep 4, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 9, 2020Provider: repository / Type: Initial release
Revision 1.1Jan 20, 2021Group: Database references / Source and taxonomy / Structure summary
Category: entity / entity_name_com ...entity / entity_name_com / entity_src_gen / struct / struct_ref / struct_ref_seq / struct_ref_seq_dif
Item: _entity.pdbx_description / _entity.pdbx_ec ..._entity.pdbx_description / _entity.pdbx_ec / _entity_src_gen.pdbx_gene_src_gene / _struct.pdbx_descriptor / _struct_ref.db_code / _struct_ref.pdbx_db_accession / _struct_ref_seq.pdbx_db_accession / _struct_ref_seq_dif.pdbx_seq_db_accession_code
Revision 1.2Feb 17, 2021Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID

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Structure visualization

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Assembly

Deposited unit
A: Uridylate-specific endoribonuclease
B: Uridylate-specific endoribonuclease
C: Uridylate-specific endoribonuclease
D: Uridylate-specific endoribonuclease
E: Uridylate-specific endoribonuclease
F: Uridylate-specific endoribonuclease
hetero molecules


Theoretical massNumber of molelcules
Total (without water)247,10118
Polymers244,5866
Non-polymers2,51512
Water0
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-IDDetails
d_1ens_1chain "E"
d_2ens_1chain "B"
d_3ens_1chain "C"
d_4ens_1chain "D"
d_5ens_1chain "A"
d_6ens_1chain "F"

NCS domain segments:
Dom-IDComponent-IDEns-IDBeg label comp-IDEnd label comp-IDLabel asym-IDLabel seq-ID
d_11ens_1METLYSM1 - 345
d_12ens_1U5PU5PN
d_13ens_1PO4PO4O
d_21ens_1METLYSD1 - 345
d_22ens_1U5PU5PE
d_23ens_1PO4PO4F
d_31ens_1METLYSG1 - 345
d_32ens_1U5PU5PH
d_33ens_1PO4PO4I
d_41ens_1METLYSJ1 - 345
d_42ens_1U5PU5PK
d_43ens_1PO4PO4L
d_51ens_1METLYSA1 - 345
d_52ens_1U5PU5PB
d_53ens_1PO4PO4C
d_61ens_1METLYSP1 - 345
d_62ens_1U5PU5PQ
d_63ens_1PO4PO4R

NCS oper:
IDCodeMatrixVector
1given(-0.999987708576, -0.00345827480819, -0.00355289067258), (-0.00345775786168, 0.999994010441, -0.000151632511306), (0.00355339377923, -0.000139345611872, -0.999993676968)106.288552739, 0.240294480089, 123.6603994
2given(0.495529149773, -0.868587765154, 0.00248111873882), (-0.868591233158, -0.495528277108, 0.000998131827983), (0.000362499400152, -0.00264968140105, -0.999996423885)73.4083874533, 126.560826674, 124.020637066
3given(-0.502073982281, -0.864812425459, 0.00460272622642), (0.864823628557, -0.502074539132, 0.00111742749342), (0.00134454646802, 0.00454157766792, 0.999988783071)125.573344675, 35.2979897855, -0.329683994305
4given(0.502118825414, 0.864798637474), (0.864797547809, -0.50211811389, 0.00161276405225), (0.00137348782772, -0.000846360719293, -0.999998698602)-20.479313042, 35.2315909723, 123.962355916
5given(-0.500481950402, 0.86574686296, -0.000431968542524), (-0.865742206576, -0.500480789268, -0.00306778867288), (-0.00287212037687, -0.00116139945925, 0.999995201026)32.6221142954, 127.061488602, 0.363804855133

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Components

#1: Protein
Uridylate-specific endoribonuclease / NendoU / Non-structural protein 15 / nsp15


Mass: 40764.336 Da / Num. of mol.: 6
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome coronavirus 2
Gene: rep, 1a-1b / Production host: Escherichia coli (E. coli)
References: UniProt: P0DTD1, Hydrolases; Acting on ester bonds
#2: Chemical
ChemComp-U5P / URIDINE-5'-MONOPHOSPHATE / Uridine monophosphate


Mass: 324.181 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C9H13N2O9P / Feature type: SUBJECT OF INVESTIGATION
#3: Chemical
ChemComp-PO4 / PHOSPHATE ION / Phosphate


Mass: 94.971 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: PO4
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: Nucleotide bound complex of SARS-CoV-2 Nsp15 / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company
MicroscopyModel: FEI TALOS ARCTICA
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy
Image recordingElectron dose: 54 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

Software
NameVersionClassificationNB
phenix.real_space_refine1.18.2_3874refinement
PHENIX1.18.2_3874refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 65393 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 99.56 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.009416374
ELECTRON MICROSCOPYf_angle_d0.76722338
ELECTRON MICROSCOPYf_chiral_restr0.05372622
ELECTRON MICROSCOPYf_plane_restr0.00412856
ELECTRON MICROSCOPYf_dihedral_angle_d13.87955724
Refine LS restraints NCS
Ens-IDDom-IDAuth asym-IDRefine-IDTypeRms dev position (Å)
ens_1d_2BELECTRON MICROSCOPYNCS constraints0.000701285683976
ens_1d_3CELECTRON MICROSCOPYNCS constraints0.000704612024634
ens_1d_4DELECTRON MICROSCOPYNCS constraints0.000700454453655
ens_1d_5AELECTRON MICROSCOPYNCS constraints0.000708086616327
ens_1d_6FELECTRON MICROSCOPYNCS constraints0.000703465752696

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