1OSE

Porcine pancreatic alpha-amylase complexed with acarbose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of pig pancreatic alpha-amylase isoenzyme II, in complex with the carbohydrate inhibitor acarbose.

Gilles, C.Astier, J.P.Marchis-Mouren, G.Cambillau, C.Payan, F.

(1996) Eur.J.Biochem. 238: 561-569

  • Also Cited By: 1HX0

  • PubMed Abstract: 
  • Two different crystal forms of pig pancreatic alpha-amylase isoenzyme II (PPAII), free and complexed to a carbohydrate inhibitor (acarbose), have been compared together and to previously reported structures of PPAI. A crystal form obtained at 4 degre ...

    Two different crystal forms of pig pancreatic alpha-amylase isoenzyme II (PPAII), free and complexed to a carbohydrate inhibitor (acarbose), have been compared together and to previously reported structures of PPAI. A crystal form obtained at 4 degrees C, containing nearly 72% solvent, made it possible to obtain a new complex with acarbose, different from a previous one obtained at 20 degrees C [Qian, M., Buisson, G., Duée, E., Haser, H. & Payan, F. (1994) Biochemistry 33, 6284-6294]. In the present form, six contiguous subsites of the enzyme active site are occupied by the carbohydrate ligand; the structural data indicate that the binding site is capable of holding more than the five glucose units of the scheme proposed through kinetic studies. A monosaccharide ring bridging two protein molecules related by the crystal packing is located on the surface, at a distance of 2.0 nm from the reducing end of the inhibitor ligand; the symmetry-related glucose ring in the crystal lattice is found 1.5 nm away from the non-reducing end of the inhibitor ligand.


    Related Citations: 
    • 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
      Qian, M.,Haser, R.,Buisson, G.,Duee, E.,Payan, F.
      (1994) Biochemistry 33: 6284
    • Structure and Molecular Model Refinement of Pig Pancreatic Alpha-Amylase at 2.1 A Resolution
      Qian, M.,Haser, R.,Payan, F.
      (1993) J.Mol.Biol. 231: 785
    • Carbohydrate Binding Sites in a Pancreatic Alpha-Amylase-Substrate Complex, Derived from X-Ray Structure Analysis at 2.1 A Resolution
      Qian, M.,Haser, R.,Payan, F.
      (1995) Protein Sci. 4: 747


    Organizational Affiliation

    LCCMB-IBSM, CNRS, Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PORCINE ALPHA-AMYLASE
A
496Sus scrofaGene Names: AMY2
EC: 3.2.1.1
Find proteins for P00690 (Sus scrofa)
Go to UniProtKB:  P00690
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AC1
Query on AC1

Download SDF File 
Download CCD File 
A
6-METHYL-5-(4,5,6-TRIHYDROXY-3-HYDROXYMETHYL-CYCLOHEX-2-ENYLAMINO)-TETRAHYDRO-PYRAN-2,3,4-TRIOL
N-[4-HYDROXYMETHYL-CYCLOHEXAN-6-YL-1,2,3-TRIOL]-4,6-DIDEOXY-4-AMINOGLUCOPYRANOSIDE
C13 H23 N O8
RBZIIHWPZWOIDU-ZCGMLSCUSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BGC
Query on BGC

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Download CCD File 
A
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
GLC
Query on GLC

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Download CCD File 
A
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 70.600α = 90.00
b = 114.700β = 90.00
c = 118.500γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
XDSdata reduction
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-03-20 
  • Released Date: 1997-04-01 
  • Deposition Author(s): Gilles, C., Payan, F.

Revision History 

  • Version 1.0: 1997-04-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance