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- PDB-1k1o: BOVINE TRYPSIN-INHIBITOR COMPLEX -

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Basic information

Entry
Database: PDB / ID: 1k1o
TitleBOVINE TRYPSIN-INHIBITOR COMPLEX
ComponentsTRYPSIN
KeywordsHYDROLASE / SERINE PROTEINASE
Function / homology
Function and homology information


trypsin / serpin family protein binding / serine protease inhibitor complex / digestion / endopeptidase activity / serine-type endopeptidase activity / proteolysis / extracellular space / metal ion binding
Similarity search - Function
: / 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 ...: / 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
Chem-IGN / Serine protease 1
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
MethodX-RAY DIFFRACTION / OTHER / Resolution: 2 Å
AuthorsStubbs, M.T.
Citation
Journal: J.Mol.Biol. / Year: 2001
Title: Factorising ligand affinity: a combined thermodynamic and crystallographic study of trypsin and thrombin inhibition.
Authors: Dullweber, F. / Stubbs, M.T. / Musil, D. / Sturzebecher, J. / Klebe, G.
#1: Journal: J.Med.Chem. / Year: 1998
Title: Structural and Functional Analyses of Benzamidine-Based Inhibitors in Complex with Trypsin: Implications for the Inhibition of Factor Xa, Tpa, and Urokinase
Authors: Renatus, M. / Bode, W. / Huber, R. / Stuerzebecher, J. / Stubbs, M.T.
#2: Journal: FEBS Lett. / Year: 1995
Title: Crystal Structures of Factor Xa Specific Inhibitors in Complex with Trypsin: Structural Grounds for Inhibition of Factor Xa and Selectivity Against Thrombin
Authors: Stubbs, M.T. / Huber, R. / Bode, W.
#3: Journal: Thromb.Res. / Year: 1993
Title: A Player of Many Parts: The Spotlight Falls on Thrombin'S Structure
Authors: Stubbs, M.T. / Bode, W.
History
DepositionSep 25, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 28, 2001Provider: repository / Type: Initial release
Revision 1.1Oct 16, 2007Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Nov 20, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_entry_details / pdbx_modification_feature / pdbx_struct_conn_angle / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_entry_details.has_protein_modification / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr2_auth_seq_id / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: TRYPSIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)23,8033
Polymers23,3241
Non-polymers4792
Water3,225179
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)55.153, 55.153, 109.674
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121

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Components

#1: Protein TRYPSIN / TRYPSINOGEN / BETA-TRYPSIN


Mass: 23324.287 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (domestic cattle) / Organ: PANCREAS / References: UniProt: P00760, trypsin
#2: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#3: Chemical ChemComp-IGN / {[(1R)-2-((2S)-2-{[(3-{[AMINO(IMINO)METHYL]AMINO}PROPYL)AMINO]CARBONYL}PIPERIDINYL)-1-(CYCLOHEXYLMETHYL)-2-OXOETHYL]AMINO}ACETIC ACID / INOGATRAN (ASTRA-ZENECA)


Mass: 438.564 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C21H38N6O4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 179 / Source method: isolated from a natural source / Formula: H2O
Compound detailsTHE 223 AMINO ACIDS OF BOVINE TRYPSIN ARE IDENTIFIED BY THE RESIDUE NUMBERS OF THE HOMOLOGOUS ...THE 223 AMINO ACIDS OF BOVINE TRYPSIN ARE IDENTIFIED BY THE RESIDUE NUMBERS OF THE HOMOLOGOUS CHYMOTRYPSINOGEN.
Has protein modificationY
Nonpolymer detailsHETATM IGN CORRESPONDS TO INHIBITOR 4 OF DULLWEBER ET AL.

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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: 2.06 Å3/Da / Density % sol: 40.4 %
Crystal grow
*PLUS
Temperature: 20 ℃ / pH: 7.3 / Method: vapor diffusion
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
15.5 mg/mldrop1drop
224-30 %PEG40001reservoir
3sodium phosphate Msodium phosphate1reservoirpH7.3

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Data collection

DiffractionMean temperature: 287 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU300 / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: Jun 15, 1999 / Details: MIRRORS
RadiationMonochromator: NI FILTER / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2→100 Å / Num. obs: 12832 / % possible obs: 93.9 % / Observed criterion σ(I): 0 / Redundancy: 5.8 % / Rmerge(I) obs: 0.071 / Rsym value: 0.071 / Net I/σ(I): 12.8
Reflection shellResolution: 2→2.07 Å / Rmerge(I) obs: 0.279 / Mean I/σ(I) obs: 4 / Rsym value: 0.279 / % possible all: 88.9
Reflection
*PLUS
Num. measured all: 50017

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
X-PLOR3.1refinement
RefinementMethod to determine structure: OTHER / Resolution: 2→8 Å / Data cutoff high absF: 10000000 / Data cutoff low absF: 0.001 / σ(F): 3
RfactorNum. reflection% reflection
Rwork0.165 --
obs0.165 11153 83.3 %
Refine analyzeLuzzati d res low obs: 10 Å
Refinement stepCycle: LAST / Resolution: 2→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1629 0 32 179 1840
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.008
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.83
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d24.9
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.35
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it
X-RAY DIFFRACTIONx_mcangle_it
X-RAY DIFFRACTIONx_scbond_it
X-RAY DIFFRACTIONx_scangle_it
LS refinement shellResolution: 2→2.03 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rwork0.197 441 -
obs--65.4 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2
Software
*PLUS
Name: X-PLOR / Version: 3.1 / Classification: refinement
Refinement
*PLUS
Lowest resolution: 8 Å / σ(F): 3
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_angle_deg1.833
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg24.9
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.35
LS refinement shell
*PLUS
Rfactor Rwork: 0.197

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