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- PDB-7jqn: Crystal structure of the R64M mutant of Bauhinia Bauhinioides Kal... -

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Basic information

Entry
Database: PDB / ID: 7jqn
TitleCrystal structure of the R64M mutant of Bauhinia Bauhinioides Kallikrein Inhibitor complexed with Human Kallikrein 4
Components
  • Kallikrein-4KLK4
  • Kunitz-type inihibitor
KeywordsSTRUCTURAL PROTEIN / HYDROLASE/INHIBITOR / Human Kallikrein 4 / Bauhinia Bauhiniordes Kallikrein Inhibitor / HYDROLASE-INHIBITOR complex
Function / homology
Function and homology information


biomineral tissue development / amelogenesis / endopeptidase inhibitor activity / Hydrolases; Acting on peptide bonds (peptidases); Serine endopeptidases / extracellular matrix disassembly / serine-type peptidase activity / secretory granule / serine-type endopeptidase activity / proteolysis / extracellular space ...biomineral tissue development / amelogenesis / endopeptidase inhibitor activity / Hydrolases; Acting on peptide bonds (peptidases); Serine endopeptidases / extracellular matrix disassembly / serine-type peptidase activity / secretory granule / serine-type endopeptidase activity / proteolysis / extracellular space / extracellular region / metal ion binding
Similarity search - Function
Proteinase inhibitor I3, Kunitz legume / Trypsin and protease inhibitor / Soybean trypsin inhibitor (Kunitz) family of protease inhibitors / Kunitz inhibitor STI-like superfamily / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin domain profile. / Serine proteases, trypsin family, serine active site. ...Proteinase inhibitor I3, Kunitz legume / Trypsin and protease inhibitor / Soybean trypsin inhibitor (Kunitz) family of protease inhibitors / Kunitz inhibitor STI-like superfamily / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin domain profile. / Serine proteases, trypsin family, serine active site. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
: / Kunitz-type inihibitor / Kallikrein-4
Similarity search - Component
Biological speciesHomo sapiens (human)
Bauhinia bauhinioides (plant)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 1.5 Å
AuthorsLi, M. / Wlodawer, A. / Gustchina, A.
CitationJournal: Acta Crystallogr D Struct Biol / Year: 2021
Title: Structural studies of complexes of kallikrein 4 with wild-type and mutated forms of the Kunitz-type inhibitor BbKI.
Authors: Li, M. / Srp, J. / Mares, M. / Wlodawer, A. / Gustchina, A.
History
DepositionAug 11, 2020Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 21, 2021Provider: repository / Type: Initial release
Revision 1.1Aug 11, 2021Group: Database references / Category: citation / citation_author / database_2
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._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 / _citation_author.name / _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
E: Kallikrein-4
I: Kunitz-type inihibitor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)43,5448
Polymers42,0572
Non-polymers1,4876
Water11,530640
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2570 Å2
ΔGint-37 kcal/mol
Surface area17370 Å2
MethodPISA
Unit cell
Length a, b, c (Å)104.087, 104.087, 86.988
Angle α, β, γ (deg.)90.000, 90.000, 120.000
Int Tables number152
Space group name H-MP3121
Components on special symmetry positions
IDModelComponents
11E-498-

HOH

21E-520-

HOH

31E-724-

HOH

41I-1130-

HOH

51I-1163-

HOH

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Components

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Protein , 2 types, 2 molecules EI

#1: Protein Kallikrein-4 / KLK4 / Enamel matrix serine proteinase 1 / Kallikrein-like protein 1 / KLK-L1 / Prostase / Serine protease 17


Mass: 23942.010 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: KLK4, EMSP1, PRSS17, PSTS / Production host: Escherichia coli (E. coli)
References: UniProt: Q9Y5K2, Hydrolases; Acting on peptide bonds (peptidases); Serine endopeptidases
#2: Protein Kunitz-type inihibitor


Mass: 18114.521 Da / Num. of mol.: 1 / Mutation: R64M
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bauhinia bauhinioides (plant) / Production host: Escherichia coli (E. coli) / References: UniProt: Q6VEQ7

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Non-polymers , 5 types, 646 molecules

#3: Chemical ChemComp-2PE / NONAETHYLENE GLYCOL / Polyethylene glycol


Mass: 414.488 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C18H38O10 / Comment: precipitant*YM
#4: Chemical ChemComp-CD / CADMIUM ION


Mass: 112.411 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cd
#5: Chemical ChemComp-SO4 / SULFATE ION / Sulfate


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#6: Chemical ChemComp-CL / CHLORIDE ION / Chloride


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#7: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 640 / Source method: isolated from a natural source / Formula: H2O

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Details

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: 3.23 Å3/Da / Density % sol: 61.97 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 7.5 / Details: 2.0 Ammonium Sulfate, 2%PEG400, 10mM CdCl2 pH 7.5

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 22-ID / Wavelength: 1 Å
DetectorType: DECTRIS EIGER X 16M / Detector: PIXEL / Date: Dec 18, 2019
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.5→86.99 Å / Num. obs: 982025 / % possible obs: 100 % / Redundancy: 11.3 % / Rsym value: 0.083 / Net I/σ(I): 9.3
Reflection shellResolution: 1.5→1.53 Å / Num. unique obs: 4314 / Rsym value: 0.854

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Processing

Software
NameVersionClassification
REFMAC5.8.0258refinement
PDB_EXTRACT3.25data extraction
XDSdata reduction
XSCALEdata scaling
REFMACphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS / Resolution: 1.5→62.67 Å / Cor.coef. Fo:Fc: 0.981 / Cor.coef. Fo:Fc free: 0.97 / SU B: 2.078 / SU ML: 0.034 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.05 / ESU R Free: 0.052 / Stereochemistry target values: MAXIMUM LIKELIHOOD
Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT U VALUES : REFINED INDIVIDUALLY
RfactorNum. reflection% reflectionSelection details
Rfree0.1613 2574 3 %RANDOM
Rwork0.1221 ---
obs0.1232 84540 99.95 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso max: 123.2 Å2 / Biso mean: 26.675 Å2 / Biso min: 7.81 Å2
Baniso -1Baniso -2Baniso -3
1--0 Å2-0 Å2-0 Å2
2---0 Å20 Å2
3---0.01 Å2
Refinement stepCycle: final / Resolution: 1.5→62.67 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2949 0 25 640 3614
Biso mean--59.67 44.87 -
Num. residues----390
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.010.0123202
X-RAY DIFFRACTIONr_angle_refined_deg1.5681.6264370
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.8675420
X-RAY DIFFRACTIONr_dihedral_angle_2_deg35.96324.247146
X-RAY DIFFRACTIONr_dihedral_angle_3_deg12.76215530
X-RAY DIFFRACTIONr_dihedral_angle_4_deg21.6381511
X-RAY DIFFRACTIONr_chiral_restr0.1140.2411
X-RAY DIFFRACTIONr_gen_planes_refined0.0090.022444
X-RAY DIFFRACTIONr_rigid_bond_restr3.62433202
LS refinement shellResolution: 1.5→1.539 Å / Rfactor Rfree error: 0 / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.242 170 -
Rwork0.21 6214 -
all-6384 -
obs--100 %

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