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- PDB-3veq: A binary complex betwwen bovine pancreatic trypsin and a engineer... -

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Basic information

Entry
Database: PDB / ID: 3veq
TitleA binary complex betwwen bovine pancreatic trypsin and a engineered mutant trypsin inhibitor
Components
  • Cationic trypsin
  • Chymotrypsin inhibitor 3
KeywordsHYDROLASE/HYDROLASE INHIBITOR / HYDROLASE-HYDROLASE INHIBITOR complex
Function / homology
Function and homology information


trypsin / serpin family protein binding / serine protease inhibitor complex / digestion / serine-type endopeptidase inhibitor activity / endopeptidase activity / serine-type endopeptidase activity / proteolysis / extracellular space / metal ion binding
Similarity search - Function
Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature. / Proteinase inhibitor I3, Kunitz legume / Trypsin and protease inhibitor / Soybean trypsin inhibitor (Kunitz) family of protease inhibitors / Kunitz inhibitor STI-like superfamily / Trefoil (Acidic Fibroblast Growth Factor, subunit A) - #50 / Trefoil (Acidic Fibroblast Growth Factor, subunit A) / Trefoil / : / Serine proteases, trypsin family, histidine active site ...Soybean trypsin inhibitor (Kunitz) protease inhibitors family signature. / Proteinase inhibitor I3, Kunitz legume / Trypsin and protease inhibitor / Soybean trypsin inhibitor (Kunitz) family of protease inhibitors / Kunitz inhibitor STI-like superfamily / Trefoil (Acidic Fibroblast Growth Factor, subunit A) - #50 / Trefoil (Acidic Fibroblast Growth Factor, subunit A) / Trefoil / : / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Serine proteases, trypsin family, histidine active site. / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain profile. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Trypsin-like serine proteases / Thrombin, subunit H / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan / Beta Barrel / Mainly Beta
Similarity search - Domain/homology
Serine protease 1 / Chymotrypsin inhibitor 3
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
Psophocarpus tetragonolobus (winged bean)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.25 Å
AuthorsSen, U. / Majumder, S. / Khamrui, S. / Dasgupta, J.
CitationJournal: Biochim.Biophys.Acta / Year: 2012
Title: Role of remote scaffolding residues in the inhibitory loop pre-organization, flexibility, rigidification and enzyme inhibition of serine protease inhibitors
Authors: Majumder, S. / Khamrui, S. / Dasgupta, J. / Dattagupta, J.K. / Sen, U.
History
DepositionJan 9, 2012Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Oct 3, 2012Provider: repository / Type: Initial release
Revision 1.1May 8, 2013Group: Database references
Revision 1.2Nov 8, 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 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_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.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_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.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.3Oct 30, 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
B: Cationic trypsin
A: Chymotrypsin inhibitor 3
hetero molecules


Theoretical massNumber of molelcules
Total (without water)43,6453
Polymers43,6052
Non-polymers401
Water2,864159
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2330 Å2
ΔGint-19 kcal/mol
Surface area15840 Å2
MethodPISA
Unit cell
Length a, b, c (Å)122.997, 39.826, 76.783
Angle α, β, γ (deg.)90.00, 119.65, 90.00
Int Tables number5
Space group name H-MC121

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Components

#1: Protein Cationic trypsin / Beta-trypsin / Alpha-trypsin chain 1 / Alpha-trypsin chain 2


Mass: 23294.262 Da / Num. of mol.: 1 / Mutation: I118V, S199A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (domestic cattle) / Plasmid: PET-28a / Production host: Escherichia coli (E. coli) / Strain (production host): BL21DE3 / References: UniProt: P00760, trypsin
#2: Protein Chymotrypsin inhibitor 3 / WCI-3


Mass: 20310.885 Da / Num. of mol.: 1 / Mutation: L668A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Psophocarpus tetragonolobus (winged bean)
Plasmid: PET28a / Production host: Escherichia coli (E. coli) / Strain (production host): BL21DE3 / References: UniProt: P10822
#3: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 159 / 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: 1.87 Å3/Da / Density % sol: 34.37 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / Details: VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.54 Å
DetectorType: MAR scanner 345 mm plate / Detector: IMAGE PLATE / Date: Sep 11, 2011
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54 Å / Relative weight: 1
ReflectionResolution: 2.25→20 Å / Num. obs: 14218 / % possible obs: 90.8 % / Biso Wilson estimate: 32.7 Å2

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Processing

Software
NameVersionClassification
CNS1.2refinement
MAR345dtbdata collection
AUTOMARdata reduction
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 2QYI

2qyi


Resolution: 2.25→19.91 Å / Rfactor Rfree error: 0.01 / Data cutoff high absF: 1319403.81 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: BULK SOLVENT MODEL USED
RfactorNum. reflection% reflectionSelection details
Rfree0.274 712 5 %RANDOM
Rwork0.218 ---
obs0.218 14218 90.8 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 63.1351 Å2 / ksol: 0.45 e/Å3
Displacement parametersBiso mean: 39 Å2
Baniso -1Baniso -2Baniso -3
1-6.04 Å20 Å2-5.87 Å2
2---4.66 Å20 Å2
3----1.37 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.36 Å0.29 Å
Luzzati d res low-5 Å
Luzzati sigma a0.3 Å0.27 Å
Refinement stepCycle: LAST / Resolution: 2.25→19.91 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2998 0 1 159 3158
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d25.6
X-RAY DIFFRACTIONc_improper_angle_d0.86
X-RAY DIFFRACTIONc_mcbond_it1.71.5
X-RAY DIFFRACTIONc_mcangle_it2.912
X-RAY DIFFRACTIONc_scbond_it22
X-RAY DIFFRACTIONc_scangle_it3.072.5
LS refinement shellResolution: 2.25→2.39 Å / Rfactor Rfree error: 0.032 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.361 129 5.2 %
Rwork0.319 2339 -
obs--95.2 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.param
X-RAY DIFFRACTION3ion.param

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