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- PDB-5jb5: A simplified BPTI variant containing 22 alanines out of 58 residues -

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Basic information

Entry
Database: PDB / ID: 5jb5
TitleA simplified BPTI variant containing 22 alanines out of 58 residues
ComponentsPancreatic trypsin inhibitor
KeywordsHYDROLASE INHIBITOR / PROTEINASE INHIBITOR
Function / homology
Function and homology information


trypsinogen activation / negative regulation of serine-type endopeptidase activity / sulfate binding / potassium channel inhibitor activity / negative regulation of platelet aggregation / zymogen binding / molecular function inhibitor activity / negative regulation of thrombin-activated receptor signaling pathway / serine protease inhibitor complex / serine-type endopeptidase inhibitor activity ...trypsinogen activation / negative regulation of serine-type endopeptidase activity / sulfate binding / potassium channel inhibitor activity / negative regulation of platelet aggregation / zymogen binding / molecular function inhibitor activity / negative regulation of thrombin-activated receptor signaling pathway / serine protease inhibitor complex / serine-type endopeptidase inhibitor activity / protease binding / calcium ion binding / extracellular space
Similarity search - Function
: / Pancreatic trypsin inhibitor Kunitz domain / Factor Xa Inhibitor / Proteinase inhibitor I2, Kunitz, conserved site / Pancreatic trypsin inhibitor (Kunitz) family signature. / BPTI/Kunitz family of serine protease inhibitors. / Pancreatic trypsin inhibitor Kunitz domain / Kunitz/Bovine pancreatic trypsin inhibitor domain / Pancreatic trypsin inhibitor (Kunitz) family profile. / Pancreatic trypsin inhibitor Kunitz domain superfamily ...: / Pancreatic trypsin inhibitor Kunitz domain / Factor Xa Inhibitor / Proteinase inhibitor I2, Kunitz, conserved site / Pancreatic trypsin inhibitor (Kunitz) family signature. / BPTI/Kunitz family of serine protease inhibitors. / Pancreatic trypsin inhibitor Kunitz domain / Kunitz/Bovine pancreatic trypsin inhibitor domain / Pancreatic trypsin inhibitor (Kunitz) family profile. / Pancreatic trypsin inhibitor Kunitz domain superfamily / Few Secondary Structures / Irregular
Similarity search - Domain/homology
Pancreatic trypsin inhibitor
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.6 Å
AuthorsIslam, M.M.
CitationJournal: Sci Rep / Year: 2017
Title: Crystal structures of highly simplified BPTIs provide insights into hydration-driven increase of unfolding enthalpy
Authors: Islam, M.M. / Yohda, M. / Kidokoro, S. / Kuroda, Y.
History
DepositionApr 13, 2016Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Apr 19, 2017Provider: repository / Type: Initial release
Revision 1.1Feb 19, 2020Group: Data collection / Category: diffrn_source / Item: _diffrn_source.pdbx_synchrotron_site
Revision 1.2Nov 8, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.3Oct 23, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Pancreatic trypsin inhibitor
B: Pancreatic trypsin inhibitor
C: Pancreatic trypsin inhibitor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)17,6547
Polymers17,2693
Non-polymers3844
Water5,098283
1
A: Pancreatic trypsin inhibitor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)5,8532
Polymers5,7561
Non-polymers961
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area0 Å2
ΔGint0 kcal/mol
Surface area3360 Å2
MethodPISA
2
B: Pancreatic trypsin inhibitor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)5,8532
Polymers5,7561
Non-polymers961
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area0 Å2
ΔGint0 kcal/mol
Surface area3410 Å2
MethodPISA
3
C: Pancreatic trypsin inhibitor
hetero molecules


Theoretical massNumber of molelcules
Total (without water)5,9493
Polymers5,7561
Non-polymers1922
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area210 Å2
ΔGint-16 kcal/mol
Surface area3360 Å2
MethodPISA
Unit cell
Length a, b, c (Å)60.989, 99.184, 61.731
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number20
Space group name H-MC2221
Components on special symmetry positions
IDModelComponents
11B-249-

HOH

21C-250-

HOH

31C-278-

HOH

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Components

#1: Protein Pancreatic trypsin inhibitor / Aprotinin / Basic protease inhibitor / BPTI


Mass: 5756.489 Da / Num. of mol.: 3 / Mutation: C49G,C73V,M87L
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (domestic cattle) / Production host: Escherichia coli (E. coli) / References: UniProt: P00974
#2: Chemical
ChemComp-SO4 / SULFATE ION


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


Mass: 18.015 Da / Num. of mol.: 283 / 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: 2.7 Å3/Da / Density % sol: 54.49 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 8.5 / Details: PEG 4000, LITIUM SULFATE, TRIS-HCL

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Data collection

DiffractionMean temperature: 95 K
Diffraction sourceSource: SYNCHROTRON / Site: Photon Factory / Beamline: BL-5A / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 1 / Detector: CCD / Date: Jun 6, 2008
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.598→50 Å / Num. obs: 23855 / % possible obs: 95.6 % / Observed criterion σ(I): -3 / Redundancy: 3.2 % / Rmerge(I) obs: 0.109 / Rsym value: 0.109 / Net I/σ(I): 6.8
Reflection shellResolution: 1.6→1.66 Å / Redundancy: 6.3 % / Rmerge(I) obs: 0.276 / Mean I/σ(I) obs: 5.6 / % possible all: 99.9

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALAdata scaling
HKL-2000phasing
REFMAC5.8.0049refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3AUB

3aub


Resolution: 1.6→26.54 Å / Cor.coef. Fo:Fc: 0.954 / Cor.coef. Fo:Fc free: 0.945 / SU B: 1.37 / SU ML: 0.049 / Cross valid method: THROUGHOUT / ESU R: 0.08 / ESU R Free: 0.08 / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.194 1283 5.1 %RANDOM
Rwork0.167 ---
obs0.169 23855 99.9 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å
Displacement parametersBiso mean: 11.69 Å2
Baniso -1Baniso -2Baniso -3
1-0.09 Å20 Å20 Å2
2---0.09 Å20 Å2
3---0 Å2
Refinement stepCycle: LAST / Resolution: 1.6→26.54 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1215 0 20 283 1518
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0190.0191275
X-RAY DIFFRACTIONr_bond_other_d0.0010.021157
X-RAY DIFFRACTIONr_angle_refined_deg1.8921.951747
X-RAY DIFFRACTIONr_angle_other_deg0.85332622
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.2595172
X-RAY DIFFRACTIONr_dihedral_angle_2_deg17.38521.92352
X-RAY DIFFRACTIONr_dihedral_angle_3_deg10.17915128
X-RAY DIFFRACTIONr_dihedral_angle_4_deg14.683159
X-RAY DIFFRACTIONr_chiral_restr0.1080.2181
X-RAY DIFFRACTIONr_gen_planes_refined0.0110.0211548
X-RAY DIFFRACTIONr_gen_planes_other0.0010.02329
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it1.170.975691
X-RAY DIFFRACTIONr_mcbond_other1.1670.973690
X-RAY DIFFRACTIONr_mcangle_it1.7341.447859
X-RAY DIFFRACTIONr_mcangle_other1.7341.448860
X-RAY DIFFRACTIONr_scbond_it1.7891.116584
X-RAY DIFFRACTIONr_scbond_other1.6171.076568
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other2.4951.585863
X-RAY DIFFRACTIONr_long_range_B_refined5.099.9221696
X-RAY DIFFRACTIONr_long_range_B_other4.5498.7881495
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 1.6→1.64 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.225 100 -
Rwork0.176 1693 -
obs--98.62 %

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