ISDA

Deposition Date 1982-10-18

Release Date 1982-10-21

Last Version Date 2024-11-13

Entry Detail

PDB ID:

2TAA

Keywords:

HYDROLASE (O-GLYCOSYL)

Title:

STRUCTURE AND POSSIBLE CATALYTIC RESIDUES OF TAKA-AMYLASE A

Biological Source:

Source Organism:

Aspergillus oryzae (Taxon ID: 5062)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.00 Å

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:TAKA-AMYLASE A
Chain IDs:A, B, C
Chain Length:478
Number of Molecules:3
Biological Source:Aspergillus oryzae

UniProt ID:P0C1B3 Pfam ID:PF00128, PF09260

Ligand Molecules

Primary Citation

Structure and possible catalytic residues of Taka-amylase A

Matsuura, Y, Kusunoki, M, Harada, W, Kakudo, M, Matsuura, Y, Kusunoki, M, Harada, W, Tanaka, N, Iga, Y, Yasuoka, N, Toda, H, Narita, K, Kakudo, M, Matsuura, Y, Kusunoki, M, Date, W, Harada, S, Bando, S, Tanaka, N, Kakudo, M.Show

J.Biochem.(Tokyo) 95 697 702 (1984)

PMID: 6609921

Abstact

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.

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Protein

Chemical

Disease

Primary Citation of related structures