1HX0

Structure of pig pancreatic alpha-amylase complexed with the "truncate" acarbose molecule (pseudotrisaccharide)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.38 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.108 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Enzyme-catalyzed condensation reaction in a mammalian alpha-amylase. High-resolution structural analysis of an enzyme-inhibitor complex

Qian, M.Nahoum, V.Bonicel, J.Bischoff, H.Henrissat, B.Payan, F.

(2001) Biochemistry 40: 7700-7709

  • Also Cited By: 1WO2

  • PubMed Abstract: 
  • Mammalian alpha-amylases catalyze the hydrolysis of alpha-linked glucose polymers according to a complex processive mechanism. We have determined the X-ray structures of porcine pancreatic alpha-amylase complexes with the smallest molecule of the tre ...

    Mammalian alpha-amylases catalyze the hydrolysis of alpha-linked glucose polymers according to a complex processive mechanism. We have determined the X-ray structures of porcine pancreatic alpha-amylase complexes with the smallest molecule of the trestatin family (acarviosine-glucose) which inhibits porcine pancreatic alpha-amylase and yet is not hydrolyzed by the enzyme. A structure analysis at 1.38 A resolution of this complex allowed for a clear identification of a genuine single hexasaccharide species composed of two alpha-1,4-linked original molecules bound to the active site of the enzyme. The structural results supported by mass spectrometry experiments provide evidence for an enzymatically catalyzed condensation reaction in the crystal.


    Related Citations: 
    • 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
    • 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


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, UMR 6098, CNRS and Universities Aix-Marseille I and II, 31 Chemin Joseph Aiguier, 13402 Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA AMYLASE (PPA)
A
496Sus scrofaGene Names: AMY2
EC: 3.2.1.1
Find proteins for P00690 (Sus scrofa)
Go to UniProtKB:  P00690
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

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A
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
AC1
Query on AC1

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

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A
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
GLC
Query on GLC

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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: 1.38 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.108 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.280α = 90.00
b = 113.550β = 90.00
c = 117.160γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
DENZOdata reduction
SCALAdata scaling
SHELXL-97refinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2001-01-11 
  • Released Date: 2001-08-08 
  • Deposition Author(s): Qian, M., Payan, F.

Revision History 

  • Version 1.0: 2001-08-08
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Version format compliance