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- PDB-1kpm: First Structural Evidence of a Specific Inhibition of Phospholipa... -
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Open data
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Basic information
Entry | Database: PDB / ID: 1kpm | |||||||||
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Title | First Structural Evidence of a Specific Inhibition of Phospholipase A2 by Vitamin E and its Implications in Inflammation: Crystal Structure of the Complex Formed between Phospholipase A2 and Vitamin E at 1.8 A Resolution. | |||||||||
![]() | Phospholipase A2 | |||||||||
![]() | HYDROLASE / phospholipase A2 / Daboia russelli pulchella / neurotoxic / inflammation | |||||||||
Function / homology | ![]() calcium-dependent phospholipase A2 activity / phospholipase A2 / arachidonate secretion / phospholipid metabolic process / lipid catabolic process / negative regulation of T cell proliferation / phospholipid binding / toxin activity / calcium ion binding / extracellular region Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | ![]() ![]() ![]() | |||||||||
![]() | Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. | |||||||||
![]() | ![]() Title: First Structural Evidence of a Specific Inhibition of Phospholipase A2 by alpha-Tocopherol (Vitamin E) and its Implications in Inflammation: Crystal Structure of the Complex Formed Between ...Title: First Structural Evidence of a Specific Inhibition of Phospholipase A2 by alpha-Tocopherol (Vitamin E) and its Implications in Inflammation: Crystal Structure of the Complex Formed Between Phospholipase A2 and alpha-Tocopherol at 1.8 A Resolution Authors: Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. #1: ![]() Title: First Structural Evidence of Antiinflammatory Action of Vitamin E (2,5,7,8-tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol) Through its Binding to Phospholipase A2 Specifically: ...Title: First Structural Evidence of Antiinflammatory Action of Vitamin E (2,5,7,8-tetramethyl-2-(4',8',12'-trimethyltridecyl)-6-chromanol) Through its Binding to Phospholipase A2 Specifically: Crystal Structure of a Complex Formed between Phospholipase A2 and Vitamin E at 1.80 Resolution Authors: Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. #2: ![]() Title: Crystal Structure of a Complex Formed between Phospholipase A2 from Daboia russelli pulchella and a Designed Pentapeptide Phe-Leu-Ser-Tyr-Lys at 1.8 Resolution Authors: Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. #3: ![]() Title: First Structural Evidence of the Inhibition of Phospholipase A2 by Aristolochic Acid: Crystal Structure of a Complex Formed between Phospholipase A2 and Aristolochic Acid Authors: Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. #4: ![]() Title: Design of Specific Inhibitors of Phospholipase A2: Crystal Structure of a Complex Formed between Phospholipase A2 from Daboia russelli pulchella and a Designed Pentapeptide Leu-Ala-Ile-Tyr-Ser at 2.0 Resolution Authors: Chandra, V. / Jasti, J. / Kaur, P. / Betzel, C. / Srinivasan, A. / Singh, T.P. #5: ![]() Title: Regulation of catalytic function by molecular association: structure of phospholipase A2 from Daboia russelli pulchella (DPLA2) at 1.9 A resolution. Authors: Chandra, V. / Kaur, P. / Jasti, J. / Betzel, C. / Singh, T.P. #6: ![]() Title: Three-dimensional structure of a presynaptic neurotoxic phospholipase A2 from Daboia russelli pulchella at 2.4 A resolution. Authors: Chandra, V. / Kaur, P. / Srinivasan, A. / Singh, T.P. | |||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 69.5 KB | Display | ![]() |
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PDB format | ![]() | 50.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 1cl5S S: Starting model for refinement |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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1 | ![]()
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2 | ![]()
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Unit cell |
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Components on special symmetry positions |
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Details | The two protein chains (A and B) represent the two molecules in the asymmetric unit, with the A molecule containing the inhibitor vitamin E |
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Components
#1: Protein | Mass: 13629.767 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Chemical | ChemComp-VIT / | #3: Chemical | ChemComp-ACY / #4: Water | ChemComp-HOH / | |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.34 Å3/Da / Density % sol: 47.4 % | ||||||||||||||||||||||||||||||
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Crystal grow | Temperature: 298 K / Method: vapor diffusion, hanging drop / pH: 6.5 Details: 20mM Sodium cacodylate, 1.4M Ammonium sulfate, 4mM Calcium chloride, 3% dioxane, pH 6.50, VAPOR DIFFUSION, HANGING DROP, temperature 298K | ||||||||||||||||||||||||||||||
Crystal grow | *PLUS pH: 6.5 / Method: vapor diffusion, sitting drop | ||||||||||||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 180 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: MARRESEARCH / Detector: IMAGE PLATE / Date: Jun 20, 1999 / Details: MIRRORS |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 0.98 Å / Relative weight: 1 |
Reflection | Resolution: 1.8→20 Å / Num. all: 23652 / Num. obs: 23652 / % possible obs: 95.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 6.6 % / Biso Wilson estimate: 21.9 Å2 / Rmerge(I) obs: 0.04 / Rsym value: 0.038 / Net I/σ(I): 9.93 |
Reflection shell | Resolution: 1.8→1.84 Å / Redundancy: 2.4 % / Rmerge(I) obs: 0.185 / Mean I/σ(I) obs: 2.1 / Num. unique all: 1609 / Rsym value: 0.084 / % possible all: 99 |
Reflection | *PLUS Highest resolution: 1.8 Å / Lowest resolution: 20 Å / % possible obs: 96 % / Rmerge(I) obs: 0.038 |
Reflection shell | *PLUS % possible obs: 99 % / Rmerge(I) obs: 0.084 / Mean I/σ(I) obs: 3 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 1CL5 Resolution: 1.8→20 Å / Rfactor Rfree error: 0.007 / Data cutoff high absF: 0 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: ENGH & HUBER / Details: Used weighted full matrix least squares procedure
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Solvent computation | Solvent model: FLAT MODEL / Bsol: 70.6763 Å2 / ksol: 0.422816 e/Å3 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 29.7 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine analyze |
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Refinement step | Cycle: LAST / Resolution: 1.8→20 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 1.8→1.91 Å / Rfactor Rfree error: 0.019 / Total num. of bins used: 6
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Xplor file |
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Refinement | *PLUS Highest resolution: 1.8 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Solvent computation | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | *PLUS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints | *PLUS
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