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- PDB-2v0b: SAD Structure solution porcine pancreatic elastase from a Selenat... -

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Basic information

Entry
Database: PDB / ID: 2v0b
TitleSAD Structure solution porcine pancreatic elastase from a Selenate derivative
ComponentsELASTASE-1
KeywordsHYDROLASE / SERINE PROTEASE / CRYSTALLIZATION / SUBSTITUTION / METAL-BINDING / SE / SAD / CALCIUM / ZYMOGEN / PROTEASE / SELENATE
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 / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, histidine active site. / Serine proteases, trypsin domain profile. / Serine proteases, trypsin family, serine active site. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Trypsin-like serine proteases ...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 domain profile. / Serine proteases, trypsin family, serine active site. / 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
SELENATE ION / Chymotrypsin-like elastase family member 1
Similarity search - Component
Biological speciesSUS SCROFA (pig)
MethodX-RAY DIFFRACTION / SYNCHROTRON / SAD / Resolution: 1.65 Å
AuthorsJakoncic, J. / Stojanoff, V.
CitationJournal: To be Published
Title: Substitution of Sulfate in Crystallization Solution to Improve Phases
Authors: Jakoncic, J.
History
DepositionMay 11, 2007Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 3, 2008Provider: repository / Type: Initial release
Revision 1.1May 8, 2011Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3May 8, 2019Group: Data collection / Experimental preparation / Other
Category: database_PDB_rev / database_PDB_rev_record ...database_PDB_rev / database_PDB_rev_record / exptl_crystal_grow / pdbx_database_proc / pdbx_database_status / pdbx_seq_map_depositor_info
Item: _exptl_crystal_grow.method / _exptl_crystal_grow.temp ..._exptl_crystal_grow.method / _exptl_crystal_grow.temp / _pdbx_database_status.recvd_author_approval / _pdbx_seq_map_depositor_info.one_letter_code / _pdbx_seq_map_depositor_info.one_letter_code_mod
Remark 700 SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "AB" IN EACH CHAIN ON SHEET RECORDS BELOW ... SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "AB" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 6-STRANDED BARREL THIS IS REPRESENTED BY A 7-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL.

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: ELASTASE-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)26,1123
Polymers25,9291
Non-polymers1832
Water4,990277
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPQS
Unit cell
Length a, b, c (Å)51.407, 57.473, 74.184
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 ELASTASE-1 / / PORCINE PANCREATIC ELASTASE


Mass: 25929.016 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) SUS SCROFA (pig) / Organ: PANCREAS / References: UniProt: P00772, pancreatic elastase
#2: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ca
#3: Chemical ChemComp-SE4 / SELENATE ION / Selenic acid


Mass: 142.958 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: O4Se
#4: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 277 / Source method: isolated from a natural source / Formula: H2O

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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: 2.1 Å3/Da / Density % sol: 41 % / Description: NONE
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 7
Details: 0.050 M NASEO4, 20 % ETHYLENE GLYCOL, USING THE HANGING DROP METHOD AT 20 C., pH 7.0

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSLS / Beamline: X6A / Wavelength: 0.9876
DetectorType: ADSC CCD / Detector: CCD / Date: May 7, 2007 / Details: TOROIDAL FOCUSING MIRROR
RadiationMonochromator: SI(111) CHANNEL CUT MONOCHROMATOR / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9876 Å / Relative weight: 1
ReflectionResolution: 1.6→30 Å / Num. obs: 154033 / % possible obs: 96.7 % / Observed criterion σ(I): 2 / Redundancy: 2.9 % / Biso Wilson estimate: 13.1 Å2 / Rmerge(I) obs: 0.05 / Net I/σ(I): 18.5
Reflection shellResolution: 1.6→1.66 Å / Redundancy: 1.3 % / Rmerge(I) obs: 0.22 / Mean I/σ(I) obs: 2.1 / % possible all: 77.4

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Processing

Software
NameVersionClassification
CNS1.2refinement
DENZOdata reduction
SCALEPACKdata scaling
SHELXphasing
RefinementMethod to determine structure: SAD
Starting model: NONE

Resolution: 1.65→28.74 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 204385.92 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: BULK SOLVENT MODEL USED
RfactorNum. reflection% reflectionSelection details
Rfree0.206 2414 5 %RANDOM
Rwork0.175 ---
obs0.175 48444 94.8 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 46.584 Å2 / ksol: 0.35 e/Å3
Displacement parametersBiso mean: 17.1 Å2
Baniso -1Baniso -2Baniso -3
1-7.94 Å20 Å20 Å2
2---3.94 Å20 Å2
3----4 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.2 Å0.16 Å
Luzzati d res low-5 Å
Luzzati sigma a0.18 Å0.17 Å
Refinement stepCycle: LAST / Resolution: 1.65→28.74 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1822 0 6 277 2105
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.01
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.5
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d26.2
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.86
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it
X-RAY DIFFRACTIONc_mcangle_it
X-RAY DIFFRACTIONc_scbond_it
X-RAY DIFFRACTIONc_scangle_it
LS refinement shellResolution: 1.65→1.71 Å / Rfactor Rfree error: 0.022 / Total num. of bins used: 10
RfactorNum. reflection% reflection
Rfree0.298 187 4.7 %
Rwork0.271 3797 -
obs--78.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER_REP.PARAMWATER_PROTIN.TOP
X-RAY DIFFRACTION3IONS.PARAMIONS.TOP

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