2gsq

GLUTATHIONE S-TRANSFERASE FROM SQUID DIGESTIVE GLAND COMPLEXED WITH S-(3-IODOBENZYL)GLUTATHIONE

spinqualitylabelsall models 2gsq, resolution 2.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2gsq is a 1 chain structure with sequence from Nototodarus sloanii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.2Å Ligands: GBI, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function GST_NOTSL High activity toward 1-chloro-2,4-dinitrobenzene. Not very efficient at catalyzing the addition of GSH to enones and epoxides. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The crystal structure of the sigma class glutathione transferase from squid digestive gland in complex with S-(3-iodobenzyl)glutathione reveals a third binding site for the glutathione conjugate besides the two in the active sites of the dimer. The additional binding site is near the crystallographic two-fold axis between the two alpha 4-turn-alpha 5 motifs. The principal binding interactions with the conjugate include specific electrostatic interactions between the peptide and the two subunits and a hydrophobic cavity found across the two-fold axis that accommodates the 3-iodobenzyl group. Thus, two identical, symmetry-related but mutually exclusive binding modes for the third conjugate are observed. The hydrophobic pocket is about 14 A from the hydroxyl group of Tyr-7 in the active site. This site is a potential transport binding site for hydrophobic molecules or their glutathione conjugates. Location of a potential transport binding site in a sigma class glutathione transferase by x-ray crystallography.,Ji X, von Rosenvinge EC, Johnson WW, Armstrong RN, Gilliland GL Proc Natl Acad Sci U S A. 1996 Aug 6;93(16):8208-13. PMID:8710848 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glutathione S-transferase 3D structures

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