ISDA

Deposition Date 2012-05-09

Release Date 2012-10-10

Last Version Date 2023-12-20

Entry Detail

PDB ID:

4ATQ

Keywords:

TRANSFERASE

Title:

GABA-transaminase A1R958 in complex with external aldimine PLP-GABA adduct

Biological Source:

Source Organism:

ARTHROBACTER AURESCENS (Taxon ID: 290340)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.75 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:4-AMINOBUTYRATE TRANSAMINASE
Gene (Uniprot):gabT
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:456
Number of Molecules:12
Biological Source:ARTHROBACTER AURESCENS

UniProt ID:A1R958 Pfam ID:PF00202

Ligand Molecules

ABU

PLP

Primary Citation

Structures of a Gamma-Aminobutyrate (Gaba) Transaminase from the S-Triazine-Degrading Organism Arthrobacter Aurescens Tc1 in Complex with Plp and with its External Aldimine Plp- Gaba Adduct.

Bruce, H, Nguyen Tuan, A, Mangas Sanchez, J, Leese, C, Hopwood, J, Hyde, R, Hart, S, Turkenburg, J.P, Grogan, G.Show

Acta Crystallogr.,Sect.F 68 1175 ? (2012)

PMID: 23027742 DOI: 10.1107/S1744309112030023

Abstact

Two complex structures of the γ-aminobutyrate (GABA) transaminase A1R958 from Arthrobacter aurescens TC1 are presented. The first, determined to a resolution of 2.80 Å, features the internal aldimine formed by reaction between the ℇ-amino group of Lys295 and the cofactor pyridoxal phosphate (PLP); the second, determined to a resolution of 2.75 Å, features the external aldimine adduct formed between PLP and GABA in the first half-reaction. This is the first structure of a microbial GABA transaminase in complex with its natural external aldimine and reveals the molecular determinants of GABA binding in this enzyme.

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Primary Citation of related structures