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Entry
Database: PDB / ID: 7keh
TitleCrystal structure from SARS-CoV-2 NendoU NSP15
ComponentsUridylate-specific endoribonuclease
KeywordsVIRAL PROTEIN / HYDROLASE / NSP15 / NendoU / covid-19 / covid / sars / sars-cov-2 / endoribonuclease
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 / omega peptidase activity / symbiont-mediated suppression of host cytoplasmic pattern recognition receptor signaling pathway via inhibition of IRF3 activity / SARS-CoV-2 modulates host translation machinery / mRNA (guanine-N7)-methyltransferase / methyltransferase cap1 / host cell Golgi apparatus / symbiont-mediated perturbation of host ubiquitin-like protein modification / DNA helicase / mRNA (nucleoside-2'-O-)-methyltransferase activity / ubiquitinyl hydrolase 1 / mRNA 5'-cap (guanine-N7-)-methyltransferase activity / cysteine-type deubiquitinase activity / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / single-stranded RNA binding / host cell perinuclear region of cytoplasm / viral protein processing / host cell endoplasmic reticulum membrane / 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 / 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 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 / (+) 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 / 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
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.59 Å
AuthorsGodoy, A.S. / Nakamura, A.M. / Pereira, H.M. / Noske, G.D. / Gawriljuk, V.O. / Fernandes, R.S. / Oliveira, K.I.Z. / Oliva, G.
Funding support Brazil, 1items
OrganizationGrant numberCountry
Sao Paulo Research Foundation (FAPESP)2013/07600-3 Brazil
CitationJournal: Nucleic Acids Res / Year: 2023
Title: Allosteric regulation and crystallographic fragment screening of SARS-CoV-2 NSP15 endoribonuclease.
Authors: Andre Schutzer Godoy / Aline Minalli Nakamura / Alice Douangamath / Yun Song / Gabriela Dias Noske / Victor Oliveira Gawriljuk / Rafaela Sachetto Fernandes / Humberto D Muniz Pereira / ...Authors: Andre Schutzer Godoy / Aline Minalli Nakamura / Alice Douangamath / Yun Song / Gabriela Dias Noske / Victor Oliveira Gawriljuk / Rafaela Sachetto Fernandes / Humberto D Muniz Pereira / Ketllyn Irene Zagato Oliveira / Daren Fearon / Alexandre Dias / Tobias Krojer / Michael Fairhead / Alisa Powell / Louise Dunnet / Jose Brandao-Neto / Rachael Skyner / Rod Chalk / Dávid Bajusz / Miklós Bege / Anikó Borbás / György Miklós Keserű / Frank von Delft / Glaucius Oliva /
Abstract: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of coronavirus disease 2019 (COVID-19). The NSP15 endoribonuclease enzyme, known as NendoU, is highly conserved and ...Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the causative agent of coronavirus disease 2019 (COVID-19). The NSP15 endoribonuclease enzyme, known as NendoU, is highly conserved and plays a critical role in the ability of the virus to evade the immune system. NendoU is a promising target for the development of new antiviral drugs. However, the complexity of the enzyme's structure and kinetics, along with the broad range of recognition sequences and lack of structural complexes, hampers the development of inhibitors. Here, we performed enzymatic characterization of NendoU in its monomeric and hexameric form, showing that hexamers are allosteric enzymes with a positive cooperative index, and with no influence of manganese on enzymatic activity. Through combining cryo-electron microscopy at different pHs, X-ray crystallography and biochemical and structural analysis, we showed that NendoU can shift between open and closed forms, which probably correspond to active and inactive states, respectively. We also explored the possibility of NendoU assembling into larger supramolecular structures and proposed a mechanism for allosteric regulation. In addition, we conducted a large fragment screening campaign against NendoU and identified several new allosteric sites that could be targeted for the development of new inhibitors. Overall, our findings provide insights into the complex structure and function of NendoU and offer new opportunities for the development of inhibitors.
History
DepositionOct 10, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 2, 2020Provider: repository / Type: Initial release
Revision 1.1May 10, 2023Group: Database references / Category: citation / citation_author / database_2
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_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.2Oct 25, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Uridylate-specific endoribonuclease
B: Uridylate-specific endoribonuclease
hetero molecules


Theoretical massNumber of molelcules
Total (without water)78,9826
Polymers78,2252
Non-polymers7574
Water8,431468
1
A: Uridylate-specific endoribonuclease
hetero molecules

A: Uridylate-specific endoribonuclease
hetero molecules

A: Uridylate-specific endoribonuclease
hetero molecules

B: Uridylate-specific endoribonuclease
hetero molecules

B: Uridylate-specific endoribonuclease
hetero molecules

B: Uridylate-specific endoribonuclease
hetero molecules


Theoretical massNumber of molelcules
Total (without water)236,94618
Polymers234,6756
Non-polymers2,27012
Water1086
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_455-y-1,x-y,z1
crystal symmetry operation3_445-x+y-1,-x-1,z1
crystal symmetry operation4_444-x-1,-y-1,z-1/21
crystal symmetry operation5_554y,-x+y,z-1/21
crystal symmetry operation6_454x-y-1,x,z-1/21
Buried area22060 Å2
ΔGint-204 kcal/mol
Surface area83830 Å2
MethodPISA
Unit cell
Length a, b, c (Å)150.920, 150.920, 111.100
Angle α, β, γ (deg.)90.000, 90.000, 120.000
Int Tables number173
Space group name H-MP63

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Components

#1: Protein Uridylate-specific endoribonuclease / NSP15 / NendoU


Mass: 39112.535 Da / Num. of mol.: 2
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-B3P / 2-[3-(2-HYDROXY-1,1-DIHYDROXYMETHYL-ETHYLAMINO)-PROPYLAMINO]-2-HYDROXYMETHYL-PROPANE-1,3-DIOL


Mass: 282.334 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C11H26N2O6 / Comment: pH buffer*YM
#3: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 468 / Source method: isolated from a natural source / Formula: H2O
Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 4.68 Å3/Da / Density % sol: 73.7 %
Crystal growTemperature: 293 K / Method: vapor diffusion / pH: 6.5
Details: 20 % w/v Polyethylene glycol 3350, 100 mM BIS-TRIS propane, pH 6.5, 200 mM Sodium sulfate

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: MAX IV / Beamline: BioMAX / Wavelength: 0.9794 Å
DetectorType: DECTRIS EIGER X 16M / Detector: PIXEL / Date: Jun 20, 2020
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9794 Å / Relative weight: 1
ReflectionResolution: 2.59→84.65 Å / Num. obs: 37814 / % possible obs: 94.8 % / Redundancy: 29.8 % / Biso Wilson estimate: 63.68 Å2 / CC1/2: 0.99 / Rmerge(I) obs: 1.031 / Rpim(I) all: 0.192 / Rrim(I) all: 1.049 / Net I/σ(I): 7.6
Reflection shell

Diffraction-ID: 1

Resolution (Å)Redundancy (%)Rmerge(I) obsNum. unique obsCC1/2Rpim(I) allRrim(I) all% possible all
2.59-2.74330.13.28818890.3730.6083.34560.3
7.517-84.6530.40.49518900.9890.0910.50399.8

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Processing

Software
NameVersionClassification
BUSTER2.10.3refinement
XDSdata reduction
Aimlessdata scaling
PDB_EXTRACT3.25data extraction
PHASERphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 6x1b

6x1b


Resolution: 2.59→84.65 Å / Cor.coef. Fo:Fc: 0.918 / Cor.coef. Fo:Fc free: 0.905 / Rfactor Rfree error: 0 / SU R Cruickshank DPI: 0.339 / Cross valid method: THROUGHOUT / σ(F): 0 / SU R Blow DPI: 0.355 / SU Rfree Blow DPI: 0.241 / SU Rfree Cruickshank DPI: 0.24
RfactorNum. reflection% reflectionSelection details
Rfree0.22 1858 4.91 %RANDOM
Rwork0.187 ---
obs0.189 37814 84.3 %-
Displacement parametersBiso max: 149.57 Å2 / Biso mean: 57.8 Å2 / Biso min: 20.5 Å2
Baniso -1Baniso -2Baniso -3
1--5.3501 Å20 Å20 Å2
2---5.3501 Å20 Å2
3---10.7003 Å2
Refine analyzeLuzzati coordinate error obs: 0.32 Å
Refinement stepCycle: final / Resolution: 2.59→84.65 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5496 0 48 468 6012
Biso mean--67.35 53.28 -
Num. residues----696
Refine LS restraints
Refine-IDTypeNumberRestraint functionWeightDev ideal
X-RAY DIFFRACTIONt_dihedral_angle_d1977SINUSOIDAL2
X-RAY DIFFRACTIONt_trig_c_planes158HARMONIC2
X-RAY DIFFRACTIONt_gen_planes799HARMONIC5
X-RAY DIFFRACTIONt_it5669HARMONIC20
X-RAY DIFFRACTIONt_nbd
X-RAY DIFFRACTIONt_improper_torsion
X-RAY DIFFRACTIONt_pseud_angle
X-RAY DIFFRACTIONt_chiral_improper_torsion740SEMIHARMONIC5
X-RAY DIFFRACTIONt_sum_occupancies
X-RAY DIFFRACTIONt_utility_distance
X-RAY DIFFRACTIONt_utility_angle
X-RAY DIFFRACTIONt_utility_torsion
X-RAY DIFFRACTIONt_ideal_dist_contact6631SEMIHARMONIC4
X-RAY DIFFRACTIONt_bond_d5669HARMONIC20.01
X-RAY DIFFRACTIONt_angle_deg7692HARMONIC21.2
X-RAY DIFFRACTIONt_omega_torsion3.08
X-RAY DIFFRACTIONt_other_torsion19.83
LS refinement shellResolution: 2.59→2.66 Å / Rfactor Rfree error: 0 / Total num. of bins used: 19
RfactorNum. reflection% reflection
Rfree0.157 8 2.29 %
Rwork0.238 342 -
all0.237 350 -
obs--10.01 %
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL11 (°2)L12 (°2)L13 (°2)L22 (°2)L23 (°2)L33 (°2)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T11 (Å2)T12 (Å2)T13 (Å2)T22 (Å2)T23 (Å2)T33 (Å2)Origin x (Å)Origin y (Å)Origin z (Å)
11.0142-0.07620.15842.03780.60021.2108-0.0051-0.25010.00950.39780.1058-0.32980.04610.1049-0.1007-0.16040.0519-0.0603-0.12480.01070.0033-53.9553-46.6523-14.7668
20.7972-0.27610.45772.1638-1.18351.17540.09160.1518-0.0089-0.12350.03060.3460.0909-0.0727-0.1221-0.22570.0449-0.0087-0.12570.01080.1102-20.3267-79.463-6.7998
Refinement TLS group
IDRefine-IDRefine TLS-IDSelection detailsAuth asym-IDAuth seq-ID
1X-RAY DIFFRACTION1{ A|* }A-1 - 346
2X-RAY DIFFRACTION2{ B|* }B-1 - 346

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