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

Experimental Data Snapshot

  • Resolution: 2.75 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 

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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.

(2012) Acta Crystallogr Sect F Struct Biol Cryst Commun 68: 1175

  • DOI: https://doi.org/10.1107/S1744309112030023
  • Primary Citation of Related Structures:  
    4ATP, 4ATQ

  • PubMed Abstract: 

    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.

  • Organizational Affiliation

    York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5DD, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
456Paenarthrobacter aurescens TC1Mutation(s): 0 
Find proteins for A1R958 (Paenarthrobacter aurescens (strain TC1))
Explore A1R958 
Go to UniProtKB:  A1R958
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA1R958
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on PLP

Download Ideal Coordinates CCD File 
AA [auth H]
CA [auth I]
EA [auth J]
GA [auth K]
IA [auth L]
AA [auth H],
CA [auth I],
EA [auth J],
GA [auth K],
IA [auth L],
M [auth A],
O [auth B],
Q [auth C],
S [auth D],
U [auth E],
W [auth F],
Y [auth G]
C8 H10 N O6 P
Query on ABU

Download Ideal Coordinates CCD File 
BA [auth H]
DA [auth I]
FA [auth J]
HA [auth K]
JA [auth L]
BA [auth H],
DA [auth I],
FA [auth J],
HA [auth K],
JA [auth L],
N [auth A],
P [auth B],
R [auth C],
T [auth D],
V [auth E],
X [auth F],
Z [auth G]
C4 H9 N O2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.75 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 176.71α = 90
b = 292.83β = 90
c = 105.96γ = 90
Software Package:
Software NamePurpose
xia2data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-10-10
    Type: Initial release
  • Version 1.1: 2012-10-17
    Changes: Database references
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection, Database references, Derived calculations, Other
  • Version 2.1: 2023-12-20
    Changes: Refinement description