2TAA

STRUCTURE AND POSSIBLE CATALYTIC RESIDUES OF TAKA-AMYLASE A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and possible catalytic residues of Taka-amylase A

Matsuura, Y.Kusunoki, M.Harada, W.Kakudo, M.

(1984) J.Biochem.(Tokyo) 95: 697-702


  • PubMed Abstract: 
  • A complete molecular model of Taka-amylase A consisting of 478 amino acid residues was built with the aid of amino acid sequence data. Some typical structural features of the molecule are described. A model fitting of an amylose chain in the catalyti ...

    A complete molecular model of Taka-amylase A consisting of 478 amino acid residues was built with the aid of amino acid sequence data. Some typical structural features of the molecule are described. A model fitting of an amylose chain in the catalytic site of the enzyme showed a possible productive binding mode between substrate and enzyme. On the basis of the difference Fourier analysis and the model fitting study, glutamic acid (Glu230) and aspartic acid (Asp297), which are located at the bottom of the cleft, were concluded to be the catalytic residues, serving as the general acid and base, respectively.


    Related Citations: 
    • Molecular Structure of Taka-Amylase A. I. Backbone Chain Folding at 3 Angstroms Resolution
      Matsuura, Y.,Kusunoki, M.,Harada, W.,Tanaka, N.,Iga, Y.,Yasuoka, N.,Toda, H.,Narita, K.,Kakudo, M.
      (1980) J.Biochem.(Tokyo) 87: 1555
    • Low Resolution Crystal Structures of Taka-Amylase a and its Complexes with Inhibitors
      Matsuura, Y.,Kusunoki, M.,Date, W.,Harada, S.,Bando, S.,Tanaka, N.,Kakudo, M.
      (1979) J.Biochem.(Tokyo) 86: 1773



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TAKA-AMYLASE A
A, B, C
478Aspergillus oryzae (strain ATCC 42149 / RIB 40)Gene Names: amy1, amy2 (amyI, Taa-G1, amyII, Taa-G2)
EC: 3.2.1.1
Find proteins for P0C1B3 (Aspergillus oryzae (strain ATCC 42149 / RIB 40))
Go to UniProtKB:  P0C1B3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 91.900α = 90.00
b = 133.300β = 102.70
c = 94.300γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1982-10-21
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance