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Basic information

Entry
Database: PDB / ID: 2bd8
TitlePorcine pancreatic elastase complexed with beta-casomorphin-7 and Arg-Phe at pH 5.0 (50 min soak) and immersed in pH 9 buffer for 30 seconds
Components
  • Chymotrypsin-like elastase family member 1
  • beta-casomorphin-7
KeywordsHYDROLASE / SERINE PROTEINASE
Function / homology
Function and homology information


pancreatic elastase / 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
Chymotrypsin-like elastase family member 1
Similarity search - Component
Biological speciesSus scrofa (pig)
Homo sapiens (human)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.7 Å
AuthorsLiu, B. / Schofield, C.J. / Wilmouth, R.C.
Citation
Journal: J.Biol.Chem. / Year: 2006
Title: Structural analyses on intermediates in serine protease catalysis
Authors: Liu, B. / Schofield, C.J. / Wilmouth, R.C.
#1: Journal: Nat.Struct.Biol. / Year: 1997
Title: Structure of a specific acyl-enzyme complex formed between beta-casomorphin-7 and porcine pancreatic elastase
Authors: Wilmouth, R.C. / Clifton, I.J. / Robinson, C.V. / Roach, P.L. / Aplin, R.T. / Westwood, N.J. / Hajdu, J. / Schofield, C.J.
#2: Journal: Nat.Struct.Biol. / Year: 2001
Title: X-ray snapshots of serine protease catalysis reveal a tetrahedral intermediate
Authors: Wilmouth, R.C. / Edman, K. / Neutze, R. / Wright, P.A. / Clifton, I.J. / Schneider, T.R. / Schofield, C.J. / Hajdu, J.
History
DepositionOct 20, 2005Deposition site: RCSB / Processing site: PDBJ
Revision 1.0May 30, 2006Provider: repository / Type: Initial release
Revision 1.1May 1, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Advisory / Version format compliance
Revision 1.3Jan 18, 2012Group: Non-polymer description
Revision 1.4Oct 18, 2017Group: Refinement description / Category: software
Revision 1.5Oct 25, 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.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_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_asym_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 2.0Sep 25, 2024Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Polymer sequence / Source and taxonomy / Structure summary
Category: atom_site / diffrn_radiation_wavelength ...atom_site / diffrn_radiation_wavelength / diffrn_source / entity / entity_name_com / entity_poly / entity_poly_seq / entity_src_nat / pdbx_distant_solvent_atoms / pdbx_entity_nonpoly / pdbx_entity_src_syn / pdbx_nonpoly_scheme / pdbx_poly_seq_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / pdbx_validate_close_contact / pdbx_validate_main_chain_plane / pdbx_validate_peptide_omega / pdbx_validate_rmsd_angle / pdbx_validate_torsion / struct_asym / struct_conn / struct_ref / struct_ref_seq / struct_ref_seq_dif / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.group_PDB / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.label_seq_id / _atom_site.pdbx_PDB_ins_code / _atom_site.type_symbol / _diffrn_radiation_wavelength.wavelength / _diffrn_source.pdbx_wavelength_list / _entity_poly.pdbx_seq_one_letter_code / _entity_poly.pdbx_seq_one_letter_code_can / _entity_src_nat.pdbx_beg_seq_num / _entity_src_nat.pdbx_end_seq_num / _pdbx_entity_src_syn.ncbi_taxonomy_id / _pdbx_entity_src_syn.organism_scientific / _pdbx_entity_src_syn.pdbx_beg_seq_num / _pdbx_entity_src_syn.pdbx_end_seq_num / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_seq_id / _struct_ref.db_code / _struct_ref.db_name / _struct_ref.entity_id / _struct_ref.pdbx_align_begin / _struct_ref.pdbx_db_accession / _struct_ref.pdbx_seq_one_letter_code / _struct_ref_seq.db_align_beg / _struct_ref_seq.db_align_end / _struct_ref_seq.pdbx_auth_seq_align_beg / _struct_ref_seq.pdbx_auth_seq_align_end / _struct_ref_seq.pdbx_db_accession / _struct_ref_seq.pdbx_strand_id / _struct_ref_seq.seq_align_end / _struct_ref_seq_dif.align_id / _struct_ref_seq_dif.details / _struct_site.details / _struct_site.pdbx_auth_seq_id / _struct_site_gen.auth_seq_id / _struct_site_gen.label_asym_id / _struct_site_gen.label_seq_id
Revision 2.1Oct 16, 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

Downloads & links

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Assembly

Deposited unit
P: beta-casomorphin-7
A: Chymotrypsin-like elastase family member 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)27,2334
Polymers27,0962
Non-polymers1362
Water2,288127
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area580 Å2
ΔGint-27 kcal/mol
Surface area10290 Å2
MethodPISA
Unit cell
Length a, b, c (Å)50.544, 57.781, 74.756
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/peptide beta-casomorphin-7


Mass: 1168.362 Da / Num. of mol.: 1 / Source method: obtained synthetically / Details: synthetic peptide / Source: (synth.) Homo sapiens (human)
#2: Protein Chymotrypsin-like elastase family member 1 / Elastase-1


Mass: 25928.031 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Sus scrofa (pig) / References: UniProt: P00772, pancreatic elastase
#3: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#4: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 127 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY
Nonpolymer detailsOG SER A 195, C ILE P 7 AND N ARG P 1001 ARE COVALENTLY LINKED WITH C ILE P 7 HAVING TETRAHEDRAL GEOMETRY.
Sequence detailsTHIS CONFLICT IS BASED ON THE REFERENCE 3 IN SEQUENCE DATABASE, P00772 IN SWISS-PROT.

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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: 2.04 Å3/Da / Density % sol: 39.6 %
Crystal growTemperature: 294 K / Method: vapor diffusion, hanging drop / pH: 5
Details: 25MM SODIUM SULPHATE, 25MM SODIUM ACETATE (PH 5.0), 25 MG/ML PPE AND 17.5 MG/ML BCM7, AND THEN SOAKED WITH ARG-PHE (2 MG) IN 250MM SODIUM ACETATE (PH 5.0) (5 MICROLITRES) FOR 50 MIN, VAPOR ...Details: 25MM SODIUM SULPHATE, 25MM SODIUM ACETATE (PH 5.0), 25 MG/ML PPE AND 17.5 MG/ML BCM7, AND THEN SOAKED WITH ARG-PHE (2 MG) IN 250MM SODIUM ACETATE (PH 5.0) (5 MICROLITRES) FOR 50 MIN, VAPOR DIFFUSION, HANGING DROP, temperature 294K

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Data collection

DiffractionMean temperature: 127 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU MICROMAX-007 / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: Jul 2, 2005 / Details: OSMIC mirrors
RadiationMonochromator: OSMIC MIRRORS / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.7→19.7 Å / Num. obs: 24742 / % possible obs: 99.9 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.4 % / Biso Wilson estimate: 19.6 Å2 / Rmerge(I) obs: 0.046 / Net I/σ(I): 21.8
Reflection shellResolution: 1.7→1.79 Å / Redundancy: 3.3 % / Rmerge(I) obs: 0.169 / Mean I/σ(I) obs: 5.3 / Num. unique all: 3539 / % possible all: 100

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Processing

Software
NameVersionClassificationNB
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACT1.7data extraction
MOSFLMdata reduction
CCP4(SCALA)data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3EST

3est


Resolution: 1.7→19.7 Å / Cor.coef. Fo:Fc: 0.96 / Cor.coef. Fo:Fc free: 0.934 / SU B: 4.123 / SU ML: 0.069 / TLS residual ADP flag: LIKELY RESIDUAL / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.106 / ESU R Free: 0.11 / Stereochemistry target values: MAXIMUM LIKELIHOOD
Details: The PPE:BCM7:ARG-PHE PH 5 (50 min soak) crystal (from which PDB file 2BD7 was collected) was warmed to room temperature, immersed in 250 mm ches PH 9, 25% (v/v) glycerol for 30s and refrozen.
RfactorNum. reflection% reflectionSelection details
Rfree0.22 1256 5.1 %RANDOM
Rwork0.173 ---
all0.176 24742 --
obs0.176 24695 99.9 %-
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: 27.949 Å2
Baniso -1Baniso -2Baniso -3
1-2.69 Å20 Å20 Å2
2---0.35 Å20 Å2
3----2.34 Å2
Refinement stepCycle: LAST / Resolution: 1.7→19.7 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1810 0 13 127 1950
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0190.0211867
X-RAY DIFFRACTIONr_angle_refined_deg1.7461.9192556
X-RAY DIFFRACTIONr_dihedral_angle_1_deg5.9485240
X-RAY DIFFRACTIONr_dihedral_angle_2_deg35.45224.23178
X-RAY DIFFRACTIONr_dihedral_angle_3_deg11.65615266
X-RAY DIFFRACTIONr_dihedral_angle_4_deg25.509159
X-RAY DIFFRACTIONr_chiral_restr0.1350.2292
X-RAY DIFFRACTIONr_gen_planes_refined0.0080.021420
X-RAY DIFFRACTIONr_nbd_refined0.2120.2886
X-RAY DIFFRACTIONr_nbtor_refined0.3110.21299
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1290.2133
X-RAY DIFFRACTIONr_metal_ion_refined0.0980.26
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.2640.229
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.2180.212
X-RAY DIFFRACTIONr_mcbond_it2.63421215
X-RAY DIFFRACTIONr_mcangle_it3.50331921
X-RAY DIFFRACTIONr_scbond_it4.9224760
X-RAY DIFFRACTIONr_scangle_it5.9076635
LS refinement shellResolution: 1.7→1.744 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.271 72 -
Rwork0.179 1725 -
all-1797 -
obs--100 %
Refinement TLS params.Method: refined / Origin x: -4.224 Å / Origin y: 28.209 Å / Origin z: 43.005 Å
111213212223313233
T-0.1874 Å20.0013 Å2-0.0085 Å2--0.1432 Å2-0.0128 Å2--0.0043 Å2
L1.261 °20.0741 °2-0.178 °2-0.9641 °2-0.0357 °2--1.7057 °2
S-0.0211 Å °-0.0031 Å °0.0169 Å °-0.0023 Å °-0.0153 Å °-0.0103 Å °0.055 Å °-0.019 Å °0.0365 Å °
Refinement TLS groupSelection: ALL

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