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- PDB-3atk: Crystal structure of trypsin complexed with cycloheptanamine -

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Basic information

Entry
Database: PDB / ID: 3atk
TitleCrystal structure of trypsin complexed with cycloheptanamine
ComponentsCationic trypsin
KeywordsHYDROLASE/HYDROLASE INHIBITOR / HYDROLASE / SERINE PROTEASE / PROTEIN / INHIBITOR / BOVINE PANCREAS / HYDROLASE-HYDROLASE INHIBITOR complex
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 / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / 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 / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / 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
cycloheptanamine / Serine protease 1
Similarity search - Component
Biological speciesBos taurus (cattle)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.74 Å
AuthorsYamane, J. / Yao, M. / Tanaka, I.
CitationJournal: J.Appl.Crystallogr. / Year: 2011
Title: In-crystal affinity ranking of fragment hit compounds reveals a relationship with their inhibitory activities
Authors: Yamane, J. / Yao, M. / Zhou, Y. / Hiramatsu, Y. / Fujiwara, K. / Yamaguchi, T. / Yamaguchi, H. / Togame, H. / Tsujishita, H. / Takemoto, H. / Tanaka, I.
History
DepositionJan 5, 2011Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 24, 2011Provider: repository / Type: Initial release
Revision 1.1Nov 1, 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_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_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.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.pdbx_dist_value / _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_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 / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.2Oct 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
A: Cationic trypsin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)23,6345
Polymers23,3241
Non-polymers3104
Water5,423301
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)54.501, 58.117, 66.646
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein Cationic trypsin / Beta-trypsin


Mass: 23324.287 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Bos taurus (cattle) / Tissue: 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-DMS / DIMETHYL SULFOXIDE


Mass: 78.133 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H6OS / Comment: DMSO, precipitant*YM
#4: Chemical ChemComp-SZ1 / cycloheptanamine


Mass: 113.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C7H15N
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 301 / 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: 2.26 Å3/Da / Density % sol: 45.64 %
Crystal growTemperature: 277 K / Method: vapor diffusion, sitting drop / pH: 8.5
Details: 0.1M TRIS-HCL, 30% PEG 3350, 0.2M LITHIUM SULFATE, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 277K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU MICROMAX-007 / Wavelength: 1.54 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54 Å / Relative weight: 1
ReflectionResolution: 1.74→50 Å / Num. all: 21283 / Num. obs: 21283 / % possible obs: 95.5 % / Observed criterion σ(I): -3 / Redundancy: 6.5 % / Biso Wilson estimate: 15.5 Å2 / Rmerge(I) obs: 0.031 / Rsym value: 0.031 / Net I/σ(I): 43.8
Reflection shellResolution: 1.74→1.8 Å / Redundancy: 6.3 % / Rmerge(I) obs: 0.11 / Mean I/σ(I) obs: 12.5 / Num. unique all: 2012 / Rsym value: 0.11 / % possible all: 91.1

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Processing

Software
NameVersionClassification
CrystalCleardata collection
MOLREPphasing
REFMAC5.2.0019refinement
HKL-2000data reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3A7T

3a7t


Resolution: 1.74→19.88 Å / Cor.coef. Fo:Fc: 0.955 / Cor.coef. Fo:Fc free: 0.947 / SU B: 1.74 / SU ML: 0.058 / Isotropic thermal model: Isotropic / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / ESU R Free: 0.102 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.18413 1072 5 %RANDOM
Rwork0.16245 ---
all0.16355 20173 --
obs0.16355 20173 99.82 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 10.487 Å2
Baniso -1Baniso -2Baniso -3
1-0.2 Å20 Å20 Å2
2---0.42 Å20 Å2
3---0.22 Å2
Refinement stepCycle: LAST / Resolution: 1.74→19.88 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1629 0 17 301 1947
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0060.0221686
X-RAY DIFFRACTIONr_bond_other_d0.0020.021110
X-RAY DIFFRACTIONr_angle_refined_deg1.0891.9552285
X-RAY DIFFRACTIONr_angle_other_deg0.7953.0092724
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.1875222
X-RAY DIFFRACTIONr_dihedral_angle_2_deg37.54425.86258
X-RAY DIFFRACTIONr_dihedral_angle_3_deg10.77215269
X-RAY DIFFRACTIONr_dihedral_angle_4_deg18.003152
X-RAY DIFFRACTIONr_chiral_restr0.0720.2259
X-RAY DIFFRACTIONr_gen_planes_refined0.0030.021881
X-RAY DIFFRACTIONr_gen_planes_other0.0010.02305
X-RAY DIFFRACTIONr_nbd_refined0.2330.2323
X-RAY DIFFRACTIONr_nbd_other0.1870.21166
X-RAY DIFFRACTIONr_nbtor_refined0.1680.2839
X-RAY DIFFRACTIONr_nbtor_other0.0820.2867
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.0940.2212
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.880.258
X-RAY DIFFRACTIONr_symmetry_vdw_other0.2330.232
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.2110.239
X-RAY DIFFRACTIONr_mcbond_it0.4591.51139
X-RAY DIFFRACTIONr_mcbond_other0.0781.5466
X-RAY DIFFRACTIONr_mcangle_it0.72521770
X-RAY DIFFRACTIONr_scbond_it1.1543645
X-RAY DIFFRACTIONr_scangle_it1.754.5515
LS refinement shellResolution: 1.741→1.786 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.224 79 -
Rwork0.197 1389 -
obs-1389 99.59 %

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