Glutathione transferases in the tapeworm Moniezia expansa

Abstract

Four forms of GSH transferase were resolved from Moniezia expansa cytosol by GSH-Sepharose affinity chromatography and chromatofocusing in the range pH 6-4, and the presence of isoenzymes was further suggested by analytical isoelectric focusing. The four GSH transferase forms in the cestode showed no clear biochemical relationship to any one mammalian GSH transferase family. The N-terminal of the major GSH transferase form showed sequence homology with the Mu and Alpha family GSH transferases. The major GSH transferase appeared to bind a number of commercially available anthelmintics but did not appear to conjugate the compounds with GSH. The major GSH transferase efficiently conjugated members of the trans-alk-2-enal and trans,trans-alka-2,4-dienal series, established secondary products of lipid peroxidation.