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- PDB-3krq: Crystal structure of the complex of lactoperoxidase with a potent... -

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Basic information

Entry
Database: PDB / ID: 3krq
TitleCrystal structure of the complex of lactoperoxidase with a potent inhibitor amino-triazole at 2.2a resolution
ComponentsLactoperoxidase
KeywordsOxidoreductase/Oxidoreductase inhibitor / heme / peroxidase / complex / Antibiotic / Antimicrobial / Cleavage on pair of basic residues / Disulfide bond / Glycoprotein / Hydrogen peroxide / Iron / Metal-binding / Secreted / Oxidoreductase-Oxidoreductase inhibitor complex
Function / homology
Function and homology information


Events associated with phagocytolytic activity of PMN cells / thiocyanate peroxidase activity / lactoperoxidase activity / peroxidase / detection of chemical stimulus involved in sensory perception of bitter taste / hydrogen peroxide catabolic process / peroxidase activity / response to oxidative stress / antibacterial humoral response / basolateral plasma membrane ...Events associated with phagocytolytic activity of PMN cells / thiocyanate peroxidase activity / lactoperoxidase activity / peroxidase / detection of chemical stimulus involved in sensory perception of bitter taste / hydrogen peroxide catabolic process / peroxidase activity / response to oxidative stress / antibacterial humoral response / basolateral plasma membrane / defense response to bacterium / heme binding / calcium ion binding / extracellular region / cytoplasm
Similarity search - Function
: / Lactoperoxidase-like, N-terminal domain / Myeloperoxidase, subunit C / Haem peroxidase domain superfamily, animal type / Haem peroxidase, animal-type / Haem peroxidase domain superfamily, animal type / Animal haem peroxidase / Animal heme peroxidase superfamily profile. / Haem peroxidase superfamily / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
3-AMINO-1,2,4-TRIAZOLE / PROTOPORPHYRIN IX CONTAINING FE / IODIDE ION / DI(HYDROXYETHYL)ETHER / Lactoperoxidase
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.25 Å
AuthorsSingh, A.K. / Singh, N. / Sinha, M. / Kushwaha, G.S. / Kaur, P. / Srinivasan, A. / Sharma, S. / Singh, T.P.
CitationJournal: J.Biol.Inorg.Chem. / Year: 2010
Title: First structural evidence for the mode of diffusion of aromatic ligands and ligand-induced closure of the hydrophobic channel in heme peroxidases
Authors: Singh, A.K. / Singh, N. / Tiwari, A. / Sinha, M. / Kushwaha, G.S. / Kaur, P. / Srinivasan, A. / Sharma, S. / Singh, T.P.
History
DepositionNov 19, 2009Deposition site: RCSB / Processing site: PDBJ
Revision 1.0May 26, 2010Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Aug 24, 2011Group: Database references / Non-polymer description / Structure summary
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Nov 1, 2023Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 2.2Nov 20, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature
Revision 2.3Aug 12, 2026Group: Derived calculations / Structure summary
Category: pdbx_modification_feature / pdbx_nonpoly_atom_coordination ...pdbx_modification_feature / pdbx_nonpoly_atom_coordination / pdbx_nonpoly_atom_coordination_sphere / pdbx_nonpoly_atom_coordination_sphere_order / pdbx_struct_conn_angle / struct_conn
Item: _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id ..._pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_label_atom_id
Description: Metalloprotein remediation / Provider: repository / Type: Remediation

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Lactoperoxidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)71,97518
Polymers67,8531
Non-polymers4,12117
Water7,584421
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)54.487, 81.105, 73.928
Angle α, β, γ (deg.)90.00, 100.82, 90.00
Int Tables number4
Space group name H-MP1211

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Lactoperoxidase / LPO


Mass: 67853.281 Da / Num. of mol.: 1 / Fragment: UNP residues 118-712 / Source method: isolated from a natural source / Source: (natural) Bos taurus (domestic cattle) / References: UniProt: P80025, peroxidase

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Sugars , 3 types, 4 molecules

#2: Polysaccharide alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpa1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1a_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-Manp]{}}}}LINUCSPDB-CARE
#3: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#4: Polysaccharide 2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAca1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1b_1-5_2*NCC/3=O][a2122h-1a_1-5_2*NCC/3=O]/1-2/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-GlcpNAc]{}}}LINUCSPDB-CARE

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Non-polymers , 7 types, 434 molecules

#5: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#6: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#7: Chemical
ChemComp-IOD / IODIDE ION


Mass: 126.904 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: I
#8: Chemical ChemComp-3TR / 3-AMINO-1,2,4-TRIAZOLE / AMITROLE


Mass: 84.080 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H4N4
#9: Chemical ChemComp-MRD / (4R)-2-METHYLPENTANE-2,4-DIOL


Mass: 118.174 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H14O2 / Comment: precipitant*YM
#10: Chemical ChemComp-PEG / DI(HYDROXYETHYL)ETHER


Mass: 106.120 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H10O3
#11: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 421 / Source method: isolated from a natural source / Formula: H2O

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Details

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: 2.36 Å3/Da / Density % sol: 47.98 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7
Details: 0.01M phosphate buffer, 0.2M ammonium iodide, 20% (w/v) PEG 3350, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 292 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU300 / Wavelength: 1.541 Å
DetectorType: MAR scanner 345 mm plate / Detector: IMAGE PLATE / Date: Aug 21, 2009 / Details: Mirror
RadiationMonochromator: Graphite / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.541 Å / Relative weight: 1
ReflectionResolution: 2.25→20 Å / Num. all: 30066 / Num. obs: 30048 / % possible obs: 99.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Biso Wilson estimate: 59.5 Å2
Reflection shellResolution: 2.25→2.33 Å / % possible all: 100

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Processing

Software
NameVersionClassification
MAR345dtbdata collection
AMoREphasing
CNS0.9refinement
AUTOMARdata reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 3GC1

3gc1


Resolution: 2.25→19.91 Å / Rfactor Rfree error: 0.01 / Data cutoff high absF: 40756.02 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.249 596 2 %RANDOM
Rwork0.226 ---
all0.232 30066 --
obs0.226 30048 99.8 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 47.7048 Å2 / ksol: 0.302208 e/Å3
Displacement parametersBiso mean: 55 Å2
Baniso -1Baniso -2Baniso -3
1-8.35 Å20 Å2-4.62 Å2
2---9.52 Å20 Å2
3---1.17 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.37 Å0.35 Å
Luzzati d res low-5 Å
Luzzati sigma a0.38 Å0.35 Å
Refinement stepCycle: LAST / Resolution: 2.25→19.91 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4774 0 223 421 5418
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.018
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg2.7
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d24.5
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d2.4
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it0.941.5
X-RAY DIFFRACTIONc_mcangle_it1.732
X-RAY DIFFRACTIONc_scbond_it0.92
X-RAY DIFFRACTIONc_scangle_it1.582.5
Refine LS restraints NCSNCS model details: NONE
LS refinement shellResolution: 2.25→2.39 Å / Rfactor Rfree error: 0.04 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.405 100 2 %
Rwork0.363 4871 -
obs--100 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2ion.paramion.top
X-RAY DIFFRACTION3water_rep.paramwater.top
X-RAY DIFFRACTION4all.paramall.top
X-RAY DIFFRACTION5carbohydrate.paramcarbohydrate.top

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