5G5E image
Deposition Date 2016-05-24
Release Date 2017-02-01
Last Version Date 2024-01-10
Entry Detail
PDB ID:
5G5E
Keywords:
TRANSFERASE
Title:
Crystallographic structure of the Tau class glutathione S-transferase MiGSTU from mango Mangifera indica L.
Biological Source:
Source Organism:
MANGIFERA INDICA (Taxon ID: 29780)
Host Organism:
ESCHERICHIA COLI
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.80 Å
R-Value Free:
0.18
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
C 1 2 1
5G5E validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TAU CLASS GLUTATHIONE S-TRANSFERASE
Chain IDs:A
Chain Length:229
Number of Molecules:1
Biological Source:MANGIFERA INDICA
UniProt ID:A0A1P8NWC2 Pfam ID:PF02798, PF00043
Ligand Molecules
ACT
PEG
Primary Citation
Insights Into Ligand Binding to a Glutathione S-Transferase from Mango: Structure, Thermodynamics and Kinetics
Biochimie 135 35 ? (2017)
PMID: 28104507 DOI: 10.1016/J.BIOCHI.2017.01.005

Abstact

We studied a mango glutathione S-transferase (GST) (Mangifera indica) bound to glutathione (GSH) and S-hexyl glutathione (GSX). This GST Tau class (MiGSTU) had a molecular mass of 25.5 kDa. MiGSTU Michaelis-Menten kinetic constants were determined for their substrates obtaining a Km, Vmax and kcat for CDNB of 0.792 mM, 80.58 mM min-1 and 68.49 s-1 respectively and 0.693 mM, 105.32 mM min-1 and 89.57 s-1, for reduced GSH respectively. MiGSTU had a micromolar affinity towards GSH (5.2 μM) or GSX (7.8 μM). The crystal structure of the MiGSTU in apo or bound to GSH or GSX generated a model that explains the thermodynamic signatures of binding and showed the importance of enthalpic-entropic compensation in ligand binding to Tau-class GST enzymes.

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Primary Citation of related structures
5G5F