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Open data
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Basic information
Entry | Database: PDB / ID: 1dhk | ||||||||||||
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Title | STRUCTURE OF PORCINE PANCREATIC ALPHA-AMYLASE | ||||||||||||
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![]() | COMPLEX (HYDROLASE/INHIBITOR) / PANCREATIC ALPHA-AMYLASE / ![]() | ||||||||||||
Function / homology | ![]() alpha-amylase inhibitor activity / ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | ||||||||||||
Biological species | ![]() ![]() ![]() ![]() ![]() | ||||||||||||
Method | ![]() ![]() ![]() | ||||||||||||
![]() | Bompard-Gilles, C. / Payan, F. | ||||||||||||
![]() | ![]() Title: Substrate mimicry in the active center of a mammalian alpha-amylase: structural analysis of an enzyme-inhibitor complex. Authors: Bompard-Gilles, C. / Rousseau, P. / Rouge, P. / Payan, F. #1: ![]() Title: Crystallization and Preliminary X-Ray Analysis of Pig Pancreatic Alpha-Amylase in Complex with a Bean Lectin-Like Inhibitor Authors: Gilles, C. / Rousseau, P. / Rouge, P. / Payan, F. #2: ![]() Title: The Active Center of a Mammalian Alpha-Amylase. Structure of the Complex of a Pancreatic Alpha-Amylase with a Carbohydrate Inhibitor Refined to 2.2-A Resolution Authors: Qian, M. / Haser, R. / Buisson, G. / Duee, E. / Payan, F. #3: ![]() Title: Structure and Molecular Model Refinement of Pig Pancreatic Alpha-Amylase at 2.1 A Resolution Authors: Qian, M. / Haser, R. / Payan, F. | ||||||||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 197.4 KB | Display | ![]() |
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PDB format | ![]() | 155.1 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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1 | ![]()
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Unit cell |
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Details | ALPHA-AI IS A DIMERIC MOLECULE (I2) CONSISTING OF TWO IDENTICAL SUBUNITS. IT BINDS TWO AMYLASE MOLECULES (2E) TO FORM A DIMERIC COMPLEX E2I2. HOWEVER, THE CRYSTALLOGRAPHIC ASYMMETRIC UNIT CORRESPONDS TO HALF THE COMPLEX MOLECULE (EI). IN THIS ENTRY, COORDINATES FOR ALL ATOMS ARE PROVIDED FOR ONE CHAIN OF AMYLASE AND ONE CHAIN OF ALPHA-AI. |
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Components
-Protein , 2 types, 2 molecules AB
#1: Protein | Mass: 55400.699 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() ![]() ![]() ![]() |
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#2: Protein | Mass: 24813.146 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) ![]() ![]() ![]() |
-Sugars , 2 types, 3 molecules ![](data/chem/img/NAG.gif)
#3: Polysaccharide | ![]() Source method: isolated from a genetically manipulated source #6: Sugar | ChemComp-NAG / | ![]() |
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-Non-polymers , 3 types, 326 molecules ![](data/chem/img/CA.gif)
![](data/chem/img/CL.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/CL.gif)
![](data/chem/img/HOH.gif)
#4: Chemical | #5: Chemical | ChemComp-CL / | ![]() #7: Water | ChemComp-HOH / | ![]() |
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-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.8 Å3/Da / Density % sol: 56 % | ||||||||||||||||||||
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Crystal grow![]() | *PLUS pH: 5 / Method: vapor diffusion, hanging dropDetails: drop solution was mixed with an equal volume of reservoir solution | ||||||||||||||||||||
Components of the solutions | *PLUS
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-Data collection
Diffraction | Mean temperature: 293 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: MAR scanner 180 mm plate / Detector: IMAGE PLATE / Date: Oct 15, 1995 |
Radiation | Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength![]() |
Reflection | Num. obs: 66769 / % possible obs: 96.7 % / Observed criterion σ(I): 1 / Redundancy: 3 % / Rmerge(I) obs: 0.05 / Net I/σ(I): 14.8 |
Reflection shell | Resolution: 1.85→1.92 Å / Rmerge(I) obs: 0.406 / Mean I/σ(I) obs: 2 / % possible all: 98.4 |
Reflection | *PLUS Highest resolution: 1.85 Å / Lowest resolution: 35 Å |
Reflection shell | *PLUS % possible obs: 98.4 % |
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Processing
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Refinement | Method to determine structure![]() ![]() Starting model: PPA NATIVE AND LECTIN FROM SEEDS OF LATHYRUS OCHRUS Resolution: 1.85→8 Å / σ(F): 0
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Displacement parameters | Biso mean: 23.7 Å2 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refine analyze | Luzzati coordinate error obs: 0.2 Å / Luzzati sigma a obs: 0.22 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: LAST / Resolution: 1.85→8 Å
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Refine LS restraints |
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