ISDA: 2AAT

Deposition Date 1989-05-30

Release Date 1989-10-15

Last Version Date 2024-02-14

Entry Detail

PDB ID:

2AAT

Keywords:

TRANSFERASE(AMINOTRANSFERASE)

Title:

2.8-ANGSTROMS-RESOLUTION CRYSTAL STRUCTURE OF AN ACTIVE-SITE MUTANT OF ASPARTATE AMINOTRANSFERASE FROM ESCHERICHIA COLI

Biological Source:

Source Organism:

Escherichia coli (Taxon ID: 562)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Observed:

0.22

Space Group:

C 2 2 21

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:ASPARTATE AMINOTRANSFERASE
Gene (Uniprot):aspC
Mutagens:K246A
Chain IDs:A
Chain Length:396
Number of Molecules:1
Biological Source:Escherichia coli

UniProt ID:P00509 Pfam ID:PF00155 EC:2.6.1.1

Ligand Molecules

PMP

SO4

Primary Citation

2.8-A-resolution crystal structure of an active-site mutant of aspartate aminotransferase from Escherichia coli.

Smith, D.L, Almo, S.C, Toney, M.D, Ringe, D, Smith, D.L, Ringe, D, Finlayson, W.L, Kirsch, J.F.Show

Biochemistry 28 8161 8167 (1989)

PMID: 2513875 DOI: 10.1021/bi00446a030

Abstact

The three-dimensional structure of a mutant of the aspartate aminotransferase from Escherichia coli, in which the active-site lysine has been substituted by alanine (K258A), has been determined at 2.8-A resolution by X-ray diffraction. The mutant enzyme contains pyridoxamine phosphate as cofactor. The structure is compared to that of the mitochondrial aspartate aminotransferase. The most striking differences, aside from the absence of the lysine side chain, occur in the positions of the pyridoxamine group and of tryptophan 140.

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