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- PDB-4qem: Crystal structure of the complex of Phospholipase A2 With P-Couma... -

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Basic information

Entry
Database: PDB / ID: 4qem
TitleCrystal structure of the complex of Phospholipase A2 With P-Coumaric Acid At 1.2 A Resolution
ComponentsPhospholipase A2 VRV-PL-VIIIa
KeywordsHYDROLASE/HYDROLASE INHIBITOR / HYDROLASE-HYDROLASE INHIBITOR complex
Function / homology
Function and homology information


phospholipase A2 / calcium-independent phospholipase A2 activity / calcium-dependent phospholipase A2 activity / arachidonate secretion / negative regulation of T cell proliferation / lipid catabolic process / phospholipid metabolic process / phospholipid binding / toxin activity / calcium ion binding / extracellular region
Similarity search - Function
Phospholipase A2, aspartic acid active site / Phospholipase A2 aspartic acid active site. / Phospholipase A2 / Phospholipase A2 / Phospholipase A2, histidine active site / Phospholipase A2 histidine active site. / Phospholipase A2 domain / Phospholipase A2 / Phospholipase A2 / Phospholipase A2 domain ...Phospholipase A2, aspartic acid active site / Phospholipase A2 aspartic acid active site. / Phospholipase A2 / Phospholipase A2 / Phospholipase A2, histidine active site / Phospholipase A2 histidine active site. / Phospholipase A2 domain / Phospholipase A2 / Phospholipase A2 / Phospholipase A2 domain / Phospholipase A2 domain superfamily / Up-down Bundle / Mainly Alpha
Similarity search - Domain/homology
4'-HYDROXYCINNAMIC ACID / Basic phospholipase A2 VRV-PL-VIIIa / Basic phospholipase A2 VRV-PL-VIIIa
Similarity search - Component
Biological speciesDaboia russellii pulchella (snake)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.2 Å
AuthorsShukla, P.K. / Tiwari, P. / Sinha, M. / Kaur, P. / Sharma, S. / Singh, T.P.
CitationJournal: Biochim.Biophys.Acta / Year: 2015
Title: Structures and binding studies of the complexes of phospholipase A2 with five inhibitors
Authors: Shukla, P.K. / Gautam, L. / Sinha, M. / Kaur, P. / Sharma, S. / Singh, T.P.
History
DepositionMay 17, 2014Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Jun 18, 2014Provider: repository / Type: Initial release
Revision 1.1Jan 28, 2015Group: Database references / Structure summary
Revision 1.2Nov 8, 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 / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _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

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Assembly

Deposited unit
A: Phospholipase A2 VRV-PL-VIIIa
hetero molecules


Theoretical massNumber of molelcules
Total (without water)13,8903
Polymers13,6301
Non-polymers2602
Water4,900272
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)52.290, 52.290, 47.250
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number78
Space group name H-MP43

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Components

#1: Protein Phospholipase A2 VRV-PL-VIIIa


Mass: 13629.767 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Daboia russellii pulchella (snake)
References: UniProt: D0VX11, UniProt: P59071*PLUS, phospholipase A2
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#3: Chemical ChemComp-HC4 / 4'-HYDROXYCINNAMIC ACID / PARA-COUMARIC ACID


Mass: 164.158 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C9H8O3
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 272 / 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: 2.37 Å3/Da / Density % sol: 48.09 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 6
Details: Ammonium acetate, PEG 4000, pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 77 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: BM14 / Wavelength: 0.97 Å
DetectorType: MARRESEARCH / Detector: CCD / Date: Feb 24, 2014 / Details: mirror
RadiationMonochromator: Graphite / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.97 Å / Relative weight: 1
ReflectionResolution: 1.2→50 Å / Num. obs: 40027 / % possible obs: 99.3 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Rmerge(I) obs: 0.047 / Net I/σ(I): 12.5
Reflection shellResolution: 1.2→1.22 Å / Rmerge(I) obs: 0.245 / Mean I/σ(I) obs: 4.3 / % possible all: 98.9

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Processing

Software
NameVersionClassification
HKL-2000data collection
AMoREphasing
REFMAC5.6.0117refinement
HKL-2000data reduction
HKL-2000data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1FB2

1fb2


Resolution: 1.2→18.49 Å / Cor.coef. Fo:Fc: 0.959 / Cor.coef. Fo:Fc free: 0.948 / SU B: 0.656 / SU ML: 0.032 / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / ESU R: 0.045 / ESU R Free: 0.049 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN USED IF PRESENT IN THE INPUT
RfactorNum. reflection% reflectionSelection details
Rfree0.22084 2003 5 %RANDOM
Rwork0.19094 ---
all0.19241 40027 --
obs0.19241 38010 99.27 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 16.966 Å2
Baniso -1Baniso -2Baniso -3
1-0.29 Å20 Å20 Å2
2--0.29 Å20 Å2
3----0.57 Å2
Refinement stepCycle: LAST / Resolution: 1.2→18.49 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms944 0 17 272 1233
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0250.02980
X-RAY DIFFRACTIONr_angle_refined_deg2.1351.9981308
X-RAY DIFFRACTIONr_dihedral_angle_1_deg5.6835113
X-RAY DIFFRACTIONr_dihedral_angle_2_deg37.88523.90241
X-RAY DIFFRACTIONr_dihedral_angle_3_deg13.1215174
X-RAY DIFFRACTIONr_dihedral_angle_4_deg7.978155
X-RAY DIFFRACTIONr_chiral_restr0.130.2133
X-RAY DIFFRACTIONr_gen_planes_refined0.0120.021717
LS refinement shellResolution: 1.2→1.22 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.242 123 -
Rwork0.24 2722 -
obs--98.68 %

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