1gsu

AN AVIAN CLASS-MU GLUTATHIONE S-TRANSFERASE, CGSTM1-1 AT 1.94 ANGSTROM RESOLUTION

spinqualitylabelsall models 1gsu, resolution 1.94Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1gsu is a 2 chain structure with sequence from Chick. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GTX Gene: CGSTM1 (CHICK) Activity: Glutathione transferase, with EC number 2.5.1.18 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [GSTM2_CHICK] Conjugation of reduced glutathione to a wide number of exogenous and endogenous hydrophobic electrophiles. 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 Glutathione S-transferase cGSTM1-1, an avian class-mu enzyme with high sequence identity with rGSTM3-3, was expressed heterologously in Escherichia coli. The three-dimensional structure of this protein that co-crystallized with an inhibitor, S-hexylglutathione, was determined by the molecular replacement method and refined to 1.94 A resolution. The three-dimensional structure and the folding topology of the dimeric cGSTM1-1 closely resembles those of other class-mu GSTs. The bound inhibitor, S-hexylglutathione, orients in disparate directions in the two subunits. The combined space occupied by the hexyl moiety of the inhibitors overlaps with that reported for rGSTM1-1 co-crystallized with (9 S,10 S)-9-(S-glutathionyl)-10-hydroxy-9,10-dihydrophenanthrene. Conformational differences at a flexible loop (residue 35 to 40) were also observed between the crystal structures of cGSTM1-1 and rGSTM1-1.cGSTM1-1 has the highest epoxidase activity among all the class-mu enzymes reported. Tyr115, has been identified as a residue that participates in the epoxidase activity of class-mu glutathione S-transferase and is conserved in cGSTM1-1. The epoxidase and trans-4-phenyl-3-buten-2-one conjugating activity of cGSTM1-1 are decreased drastically but not abolished by replacing Tyr115 with phenylalanine. The specificity constant of the cGSTM1-1(Y115F) mutant, with 1-chloro-2,4-dinitrobenzene as substrate, is 15-fold higher than that of the wild-type enzyme. The three-dimensional structure of an avian class-mu glutathione S-transferase, cGSTM1-1 at 1.94 A resolution.,Sun YJ, Kuan IC, Tam MF, Hsiao CD J Mol Biol. 1998 Apr 24;278(1):239-52. PMID:9571047 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glutathione S-transferase

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