1UA3

Crystal structure of the pig pancreatic a-amylase complexed with malto-oligosaccharides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Pig Pancreatic alpha-Amylase Complexed with Malto-Oligosaccharides

Payan, F.Qian, M.

(2003) J.PROTEIN CHEM. 22: 275-284

  • Also Cited By: 1VAH, 1WO2

  • PubMed Abstract: 
  • The structural X-ray map of a pig pancreatic alpha-amylase crystal soaked (and flash-frozen) with a maltopentaose substrate showed a pattern of electron density corresponding to the binding of oligosaccharides at the active site and at three surface ...

    The structural X-ray map of a pig pancreatic alpha-amylase crystal soaked (and flash-frozen) with a maltopentaose substrate showed a pattern of electron density corresponding to the binding of oligosaccharides at the active site and at three surface binding sites. The electron density region observed at the active site, filling subsites-3 through-1, was interpreted in terms of the process of enzyme-catalyzed hydrolysis undergone by maltopentaose. Because the expected conformational changes in the "flexible loop" that constitutes the surface edge of the active site were not observed, the movement of the loop may depend on aglycone site being filled. The crystal structure was refined at 2.01 A resolution to an R factor of 17.0% ( R(free) factor of 19.8%). The final model consists of 3910 protein atoms, one calcium ion, two chloride ions, 103 oligosaccharide atoms, 761 atoms of water molecules, and 23 ethylene glycol atoms.


    Related Citations: 
    • Structure of a pancreatic alpha-amylase bound to a substrate analogue at 2.03 A resolution
      Qian, M.,Spinelli, S.,Driguez, H.,Payan, F.
      (1997) PROTEIN SCI. 6: 2285


    Organizational Affiliation

    Architecture et Fonction des Macromolécules Biologiques, CNRS and Universities Aix-Marseille I and II, Marseille, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-amylase, pancreatic
A
496Sus scrofaGene Names: AMY2
EC: 3.2.1.1
Find proteins for P00690 (Sus scrofa)
Go to UniProtKB:  P00690
Small Molecules
Ligands 6 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
MLR
Query on MLR

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A
MALTOTRIOSE
AMYLOTRIOSE
C18 H32 O16
FYGDTMLNYKFZSV-PXXRMHSHSA-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
EDO
Query on EDO

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A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.01 Å
  • R-Value Free: 0.196 
  • R-Value Work: 0.175 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.781α = 90.00
b = 113.183β = 90.00
c = 116.924γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DENZOdata reduction
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2003-02-27 
  • Released Date: 2003-10-14 
  • Deposition Author(s): Payan, F., Qian, M.

Revision History 

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance