1GNW

STRUCTURE OF GLUTATHIONE S-TRANSFERASE

DOI: 10.2210/pdb1GNW/pdb

Classification: TRANSFERASE
Organism(s): Arabidopsis thaliana
Expression System: Escherichia coli
Mutation(s): No

Deposited: 1996-09-15 Released: 1997-09-17
Deposition Author(s): Reinemer, P., Prade, L., Hof, P., Neuefeind, T., Huber, R., Palme, K., Bartunik, H.D., Bieseler, B.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.20 Å
R-Value Work: 0.175
R-Value Observed: 0.175

wwPDB Validation3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Three-dimensional structure of glutathione S-transferase from Arabidopsis thaliana at 2.2 A resolution: structural characterization of herbicide-conjugating plant glutathione S-transferases and a novel active site architecture.

Reinemer, P., Prade, L., Hof, P., Neuefeind, T., Huber, R., Zettl, R., Palme, K., Schell, J., Koelln, I., Bartunik, H.D., Bieseler, B.

(1996) J Mol Biol 255: 289-309

PubMed: 8551521 Search on PubMed
DOI: 10.1006/jmbi.1996.0024
Structures With Same Primary Citation

PubMed Abstract:

Glutathione S-transferases (GST) are a family of multifunctional enzymes involved in the metabolization of a broad variety of xenobiotics and reactive endogenous compounds. The interest in plant glutathione S-transferases may be attributed to their agronomic value, since it has been demonstrated that glutathione conjugation for a variety of herbicides is the major resistance and selectivity factor in plants. The three-dimensional structure of glutathione S-transferase from the plant Arabidopsis thaliana has been solved by multiple isomorphous replacement and multiwavelength anomalous dispersion techniques at 3 A resolution and refined to a final crystallographic R-factor of 17.5% using data from 8 to 2.2 A resolution. The enzyme forms a dimer of two identical subunits each consisting of 211 residues. Each subunit is characterized by the GST-typical modular structure with two spatially distinct domains. Domain I consists of a central four-stranded beta-sheet flanked on one side by two alpha-helices and on the other side by an irregular segment containing three short 3(10)-helices, while domain II is entirely helical. The dimeric molecule is globular with a prominent large cavity formed between the two subunits. The active site is located in a cleft situated between domains I and II and each subunit binds two molecules of a competitive inhibitor S-hexylglutathione. Both hexyl moieties are oriented parallel and fill the H-subsite of the enzyme's active site. The glutathione peptide of one inhibitor, termed productive binding, occupies the G-subsite with multiple interactions similar to those observed for other glutathione S-transferases, while the glutathione backbone of the second inhibitor, termed unproductive binding, exhibits only weak interactions mediated by two polar contacts. A most striking difference from the mammalian glutathione S-transferases, which share a conserved catalytic tyrosine residue, is the lack of this tyrosine in the active site of the plant glutathione S-transferase.

Organizational Affiliation:

Bayer AG, GB Pflanzenschutz (PF-F Biotechnologie) Pflanzenschutzzentrum Monheim, Leverkusen, Germany.

Macromolecules

Find similar proteins by: Sequence | Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GLUTATHIONE S-TRANSFERASE	A, B	211	Arabidopsis thaliana	Mutation(s): 0 Gene Names: GSTF2, PM24.1, At4g02520, T10P11.18 EC: 2.5.1.18
Find proteins for P46422 (Arabidopsis thaliana) Go to UniProtKB: P46422
Protein Feature View Full Protein Feature View for P46422

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
GTX Query on GTX Download CCD File	A, B	S-HEXYLGLUTATHIONE C₁₆ H₃₀ N₃ O₆ S HXJDWCWJDCOHDG-RYUDHWBXSA-O		Ligand Interaction