Abstract
A new class of glutathione transferases has been discovered by analysis of the expressed sequence tag data base and sequence alignment. Glutathione S-transferases (GSTs) of the new class, named Omega, exist in several mammalian species and Caenorhabditis elegans. In humans, GSTO 1-1 is expressed in most tissues and exhibits glutathione-dependent thiol transferase and dehydroascorbate reductase activities characteristic of the glutaredoxins. The structure of GSTO 1-1 has been determined at 2.0-Å resolution and has a characteristic GST fold (Protein Data Bank entry code leem). The Omega class GSTs exhibit an unusual N-terminal extension that abuts the C terminus to form a novel structural unit, Unlike other mammalian GSTs, GSTO 1-1 appears to have an active site cysteine that can form a disulfide bond with glutathione.
Original language | English |
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Pages (from-to) | 24798-24806 |
Number of pages | 9 |
Journal | Journal of Biological Chemistry |
Volume | 275 |
Issue number | 32 |
DOIs | |
Publication status | Published - 11 Aug 2000 |