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- PDB-2q6f: Crystal structure of infectious bronchitis virus (IBV) main prote... -

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Basic information

Entry
Database: PDB / ID: 2q6f
TitleCrystal structure of infectious bronchitis virus (IBV) main protease in complex with a Michael acceptor inhibitor N3
Components
  • Infectious bronchitis virus (IBV) main protease
  • N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE
KeywordsHYDROLASE / coronavirus / IBV / main protease / 3C-Like proteinase / Michael acceptor inhibitor
Function / homology
Function and homology information


host cell membrane / viral genome replication / peptidase activity / transferase activity / omega peptidase activity / ubiquitinyl hydrolase 1 / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / regulation of autophagy / viral protein processing / host cell perinuclear region of cytoplasm ...host cell membrane / viral genome replication / peptidase activity / transferase activity / omega peptidase activity / ubiquitinyl hydrolase 1 / Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases / regulation of autophagy / viral protein processing / host cell perinuclear region of cytoplasm / lyase activity / host cell endoplasmic reticulum membrane / viral translational frameshifting / symbiont-mediated activation of host autophagy / cysteine-type endopeptidase activity / proteolysis / RNA binding / zinc ion binding / metal ion binding / membrane
Similarity search - Function
Non-structural protein 2, gammacoronavirus / Non-structural protein 6, gammacoronavirus / Non-structural protein 2, gammacoronavirus / Non-structural protein 5, gammacoronavirus / Non-structural protein 2, IBV-like / main proteinase (3clpro) structure, domain 3 / main proteinase (3clpro) structure, domain 3 / Trypsin-like serine proteases / Papain-like viral protease, palm and finger domains, coronavirus / NSP3, second ubiquitin-like (Ubl) domain, coronavirus ...Non-structural protein 2, gammacoronavirus / Non-structural protein 6, gammacoronavirus / Non-structural protein 2, gammacoronavirus / Non-structural protein 5, gammacoronavirus / Non-structural protein 2, IBV-like / main proteinase (3clpro) structure, domain 3 / main proteinase (3clpro) structure, domain 3 / Trypsin-like serine proteases / Papain-like viral protease, palm and finger domains, 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. / Coronavirus RNA-dependent RNA polymerase (RdRp) Nsp8 cofactor domain profile. / Coronavirus Nsp9 single-stranded RNA (ssRNA)-binding domain profile. / Coronavirus (CoV) ExoN/MTase coactivator domain profile. / Coronavirus (CoV) Nsp3 Y domain profile. / Coronavirus Nsp4 C-terminal (Nsp4C) domain profile. / Coronavirus main protease (M-pro) domain profile. / Peptidase C30, coronavirus / Peptidase C16, coronavirus / Non-structural protein NSP9, coronavirus / Non-structural protein NSP7, coronavirus / Non-structural protein NSP8, coronavirus / RNA synthesis protein NSP10, coronavirus / Non-structural protein NSP4, C-terminal, coronavirus / RNA synthesis protein NSP10 superfamily, coronavirus / Non-structural protein NSP9 superfamily, coronavirus / Non-structural protein NSP7 superfamily, coronavirus / Non-structural protein NSP8 superfamily, coronavirus / Non-structural protein NSP4, C-terminal superfamily, coronavirus / Papain-like protease, thumb domain superfamily, coronavirus / Peptidase C30, domain 3, coronavirus / Non-structural protein 6, coronavirus / Coronavirus replicase NSP3, C-terminal / Non-structural protein NSP4, N-terminal, coronavirus / Coronavirus endopeptidase C30 / Coronavirus papain-like peptidase / Coronavirus replicase NSP8 / Coronavirus RNA synthesis protein NSP10 / Coronavirus replicase NSP4, C-terminal / Coronavirus replicase NSP6 / Coronavirus replicase NSP4, N-terminal / Coronavirus replicase NSP3, C-terminal / Coronavirus replicase NSP9 / Thrombin, subunit H / Non-structural protein 3, X-domain-like / Appr-1"-p processing enzyme / Macro domain / Macro domain profile. / Macro domain / Macro domain-like / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan / Beta Barrel / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE / Replicase polyprotein 1a / 3C-like protease
Similarity search - Component
Biological speciesInfectious bronchitis virus
synthetic construct (others)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsXue, X.Y. / Yang, H.T. / Xue, F. / Bartlam, M. / Rao, Z.H.
CitationJournal: J.Virol. / Year: 2008
Title: Structures of two coronavirus main proteases: implications for substrate binding and antiviral drug design.
Authors: Xue, X. / Yu, H. / Yang, H. / Xue, F. / Wu, Z. / Shen, W. / Li, J. / Zhou, Z. / Ding, Y. / Zhao, Q. / Zhang, X.C. / Liao, M. / Bartlam, M. / Rao, Z.
History
DepositionJun 5, 2007Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 12, 2008Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Dec 2, 2015Group: Structure summary
Revision 1.3Aug 30, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_conn / struct_ref_seq_dif
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_label_asym_id / _struct_ref_seq_dif.details
Revision 2.0Nov 15, 2023Group: Atomic model / Data collection / Derived calculations
Category: atom_site / chem_comp_atom ...atom_site / chem_comp_atom / chem_comp_bond / struct_conn
Item: _atom_site.auth_atom_id / _atom_site.label_atom_id ..._atom_site.auth_atom_id / _atom_site.label_atom_id / _chem_comp_atom.atom_id / _chem_comp_bond.atom_id_1 / _chem_comp_bond.atom_id_2 / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr2_label_atom_id
Revision 2.1Oct 16, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Infectious bronchitis virus (IBV) main protease
B: Infectious bronchitis virus (IBV) main protease
D: N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE
C: N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE


Theoretical massNumber of molelcules
Total (without water)68,6334
Polymers68,6334
Non-polymers00
Water7,548419
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area4800 Å2
ΔGint-31 kcal/mol
Surface area24560 Å2
MethodPISA
Unit cell
Length a, b, c (Å)53.175, 54.502, 66.719
Angle α, β, γ (deg.)111.06, 104.31, 91.33
Int Tables number1
Space group name H-MP1
DetailsThe biological assembly is a dimer with one inhibitor molecule in the active site of each protomer.

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Components

#1: Protein Infectious bronchitis virus (IBV) main protease / Fragment


Mass: 33635.949 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Infectious bronchitis virus / Genus: Coronavirus / Strain: M41 / Gene: M41 3C-like protease gene / Plasmid: pGEX-4T-1 / Species (production host): Escherichia coli / Production host: Escherichia coli BL21 (bacteria) / Strain (production host): BL21
References: UniProt: Q3Y5H1, UniProt: P0C6V5*PLUS, Hydrolases; Acting on peptide bonds (peptidases); Cysteine endopeptidases
#2: Protein/peptide N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE


Type: Peptide-like / Class: Inhibitor / Mass: 680.791 Da / Num. of mol.: 2 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
References: N-[(5-METHYLISOXAZOL-3-YL)CARBONYL]ALANYL-L-VALYL-N~1~-((1R,2Z)-4-(BENZYLOXY)-4-OXO-1-{[(3R)-2-OXOPYRROLIDIN-3-YL]METHYL}BUT-2-ENYL)-L-LEUCINAMIDE
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 419 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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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: 2.58 Å3/Da / Density % sol: 52.29 %
Crystal growTemperature: 291 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: 20% PEG10000, 0.1M HEPES pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 291K

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU MICROMAX-007 / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV++ / Detector: IMAGE PLATE / Date: Dec 8, 2006
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2→50 Å / Num. obs: 42883 / % possible obs: 94.2 % / Observed criterion σ(I): 0 / Redundancy: 3.9 % / Rmerge(I) obs: 0.041
Reflection shellResolution: 2→2.07 Å / Redundancy: 3.3 % / Rmerge(I) obs: 0.225 / Mean I/σ(I) obs: 5.1 / Num. unique all: 3787 / % possible all: 82.6

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Processing

Software
NameClassification
HKL-2000data collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 2Q6D

2q6d


Resolution: 2→50 Å / Isotropic thermal model: Isotropic / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.242 4231 -Random
Rwork0.216 ---
all0.218 45473 --
obs-42003 92.4 %-
Refinement stepCycle: LAST / Resolution: 2→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4620 0 0 419 5039
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.011
X-RAY DIFFRACTIONc_angle_d1.75

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