2TAA

STRUCTURE AND POSSIBLE CATALYTIC RESIDUES OF TAKA-AMYLASE A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å

wwPDB Validation   3D Report Full Report


This is version 1.3 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 95: 697-702

  • DOI: https://doi.org/10.1093/oxfordjournals.jbchem.a134659
  • Primary Citation of Related Structures:  
    2TAA

  • 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 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.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TAKA-AMYLASE A
A, B, C
478Aspergillus oryzaeMutation(s): 0 
EC: 3.2.1.1
UniProt
Find proteins for P0C1B3 (Aspergillus oryzae (strain ATCC 42149 / RIB 40))
Explore P0C1B3 
Go to UniProtKB:  P0C1B3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C1B3
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.9α = 90
b = 133.3β = 102.7
c = 94.3γ = 90

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1982-10-21
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2024-06-05
    Changes: Data collection, Database references, Derived calculations, Other