ISDA: 5G5F

Deposition Date 2016-05-24

Release Date 2017-02-01

Last Version Date 2024-01-10

Entry Detail

PDB ID:

5G5F

Keywords:

TRANSFERASE

Title:

Crystallographic structure of the Tau class glutathione S-transferase MiGSTU in complex with reduced glutathione.

Biological Source:

Source Organism:

MANGIFERA INDICA (Taxon ID: 29780)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.30 Å

R-Value Free:

0.24

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

C 1 2 1

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Macromolecular Entities

Structures with similar UniProt ID

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

GSH

PEG

Primary Citation

Insights Into Ligand Binding to a Glutathione S-Transferase from Mango: Structure, Thermodynamics and Kinetics

Valenzuela-Chavira, I, Contreras-Vergara, C.A, Arvizu-Flores, A.A, Serrano-Posada, H, Lopez-Zavala, A.A, Garcia-Orozco, K.D, Hernandez-Paredes, J, Rudino-Pinera, E, Stojanoff, V, Sotelo-Mundo, R.R, Islas-Osuna, M.A.Show

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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