A labile GSH transferase homodimer termed 11-11 was purified from rat testis by GSH-agarose affinity chromatography followed by anion-exchange f.p.l.c. The enzyme is unstable in the absence of thiol(s) and has relatively low affinity for both 1-chloro-2,4-dinitrobenzene (Km 4.4 mM) and GSH (Km(app.) 4.4mM). Its mobility on SDS/polyacrylamide-gel electrophoresis is slightly less than that of subunits 3 and 4 and its pI is 5.2. Subunit 11 has a blocked N-terminal amino acid residue, but after CNBr cleavage fragments accounting for 113 amino acid residues were sequenced and showed 65% homology with corresponding sequences in subunit 4, indicating that it is a member of the Mu family. GSH transferase 11 is a major isoenzyme in testis, epididymis, prostate and brain and present at lower concentrations in other tissues.
Research Article|June 15 1989
Purification and characterization of a labile rat glutathione transferase of the Mu class
D J Meyer;
Biochem J (1989) 260 (3): 789-793.
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A Kispert, D J Meyer, E Lalor, B Coles, B Ketterer; Purification and characterization of a labile rat glutathione transferase of the Mu class. Biochem J 15 June 1989; 260 (3): 789–793. doi: https://doi.org/10.1042/bj2600789
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