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- PDB-1c2i: RECRUITING ZINC TO MEDIATE POTENT, SPECIFIC INHIBITION OF SERINE ... -

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Basic information

Entry
Database: PDB / ID: 1c2i
TitleRECRUITING ZINC TO MEDIATE POTENT, SPECIFIC INHIBITION OF SERINE PROTEASES
ComponentsTRYPSIN
KeywordsHYDROLASE/HYDROLASE INHIBITOR / ZN(II)-MEDIATED SERINE PROTEASE INHIBITORS / PH DEPENDENCE / ZN(II) AFFINITY STUCTURE-BASED DRUG DESIGN / SERINE PROTEASE/INHIBITOR / 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 / 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
BIS(5-AMIDINO-2-BENZIMIDAZOLYL)METHANE KETONE / Serine protease 1
Similarity search - Component
Biological speciesBos taurus (domestic cattle)
MethodX-RAY DIFFRACTION / DIFFERENCE FOURIER PLUS REFINEMENT / Resolution: 1.47 Å
AuthorsKatz, B.A. / Luong, C.
CitationJournal: Nature / Year: 1998
Title: Design of potent selective zinc-mediated serine protease inhibitors.
Authors: Katz, B.A. / Clark, J.M. / Finer-Moore, J.S. / Jenkins, T.E. / Johnson, C.R. / Ross, M.J. / Luong, C. / Moore, W.R. / Stroud, R.M.
History
DepositionJul 21, 1999Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 26, 2000Provider: repository / Type: Initial release
Revision 1.1Apr 26, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 4, 2017Group: Advisory / Refinement description / Category: pdbx_unobs_or_zero_occ_atoms / software
Revision 1.4Dec 27, 2023Group: Advisory / Data collection ...Advisory / Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_conn_angle / pdbx_struct_special_symmetry / pdbx_unobs_or_zero_occ_atoms / 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_alt_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.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_alt_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.pdbx_ptnr1_label_alt_id / _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_conn.ptnr2_symmetry / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.5Nov 6, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature / Item: _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: TRYPSIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)24,0238
Polymers23,3241
Non-polymers6987
Water3,531196
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)55.000, 55.000, 109.760
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121
Components on special symmetry positions
IDModelComponents
11A-578-

HOH

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Components

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Protein , 1 types, 1 molecules A

#1: Protein TRYPSIN


Mass: 23324.287 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Details: COMPLEXED WITH BIS(5-AMIDINO-2-BENZIMIDAZOLYL)METHANE KETONE
Source: (natural) Bos taurus (domestic cattle) / References: UniProt: P00760, trypsin

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Non-polymers , 6 types, 203 molecules

#2: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#3: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#4: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Zn
#5: Chemical ChemComp-BAK / BIS(5-AMIDINO-2-BENZIMIDAZOLYL)METHANE KETONE


Mass: 348.362 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C17H16N8O
#6: Chemical ChemComp-DMS / DIMETHYL SULFOXIDE


Mass: 78.133 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C2H6OS / Comment: DMSO, precipitant*YM
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 196 / Source method: isolated from a natural source / Formula: H2O

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Details

Compound detailsHIS91 IS MONOPROTONATED ON THE EPSILON NITROGEN. HIS57 IS MONOPROTONATED ON THE DELTA NITROGEN. ...HIS91 IS MONOPROTONATED ON THE EPSILON NITROGEN. HIS57 IS MONOPROTONATED ON THE DELTA NITROGEN. HIS40 IS DIPROTONATED.
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: 2.05 Å3/Da / Density % sol: 18 %
Crystal growpH: 5.5
Details: BATCH, 1.51 M MGSO4 . 7 H2O, 0.59 MM TRYPSIN, 1.0 MM ZN(II) 5.0 % DMSO: CRYSTALLIZATION SOLUTION WAS SATURATED IN KETO-BABIM. CRYSTAL WAS TRANSFERRED TO SYNTHETIC MOTHER LIQUOR CONTAINING 46 ...Details: BATCH, 1.51 M MGSO4 . 7 H2O, 0.59 MM TRYPSIN, 1.0 MM ZN(II) 5.0 % DMSO: CRYSTALLIZATION SOLUTION WAS SATURATED IN KETO-BABIM. CRYSTAL WAS TRANSFERRED TO SYNTHETIC MOTHER LIQUOR CONTAINING 46 MM ZN(II), PH 5.50 AND SOAKED FOR SEVERAL DAYS WITH SEVERAL REPLACEMENTS OF SOAKING SOLUTIONS. THE SOLUTION WAS SATURATED IN KETO-BABIM AND CONTAINED 2.0 % DMSO TO INCREASE INHIBITOR SOLUBILITY.
Crystal grow
*PLUS
Method: unknown

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS IV++ / Detector: IMAGE PLATE / Date: Feb 25, 1997 / Details: MSC MIRRORS
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.4→54.8 Å / Num. obs: 27202 / % possible obs: 80 % / Observed criterion σ(I): 1 / Redundancy: 3.2 % / Rmerge(I) obs: 0.071 / Net I/σ(I): 12.7
Reflection shellResolution: 1.47→1.54 Å / Rmerge(I) obs: 0.225 / Mean I/σ(I) obs: 2 / % possible all: 34.4

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Processing

Software
NameVersionClassification
bioteX(MSC)data collection
bioteX(MSC)data reduction
X-PLORmodel building
Quantamodel building
Insight IImodel building
X-PLOR3.1refinement
bioteXdata scaling
X-PLORphasing
RefinementMethod to determine structure: DIFFERENCE FOURIER PLUS REFINEMENT
Resolution: 1.47→7.5 Å / Cross valid method: X-PLOR / σ(F): 2
Details: BULK SOLVENT TERMS INCLUDED IN FOB FILE CREATED WITH STANDARD X-PLOR SCRIPT.
RfactorNum. reflection% reflection
Rfree0.208 2613 10 %
Rwork0.177 --
obs0.177 26297 80 %
Refinement stepCycle: LAST / Resolution: 1.47→7.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3315 0 55 588 3958
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.019
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_deg4
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d26.4
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d0.59
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: 1.47→1.54 Å / Total num. of bins used: 8
RfactorNum. reflection% reflection
Rfree0.388 155 10 %
Rwork0.391 1236 -
obs--34.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARMALLH3X_KBZN55.PROTOPALLH6X_KBZN55.PRO
X-RAY DIFFRACTION2PARAM11_UCSF.WAT

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