Cloning, characterisation and bacterial expression of full length cDNA for the mouse liver microsomal glutathione S-transferase

Haider Raza, Jayati Mullick, Annie John, Shripad V. Bhagwat, Narayan G. Avadhani

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We have isolated a cDNA encoding full length microsomal glutathione S-transferase (MGST) from mouse liver. The cDNA was isolated by RT-PCR using primers designed from published cDNA sequence of rat MGST with the addition of 5′ Nde-1 and 3′ HindIII sites, and cloned into bacterial expression vector pSP19T7LT. Deduced amino acid sequence (155 amino acids, calculated mol.mass 17512 Dalton) confirmed the identity of microsomal GST from mouse liver which has sequence homology with that of rat and human liver MGST1. Recombinant GST cDNA (GenBank accession # 159050) was expressed in BL21(DE3) in the presence of 1 mM IPTG at 30°C. The expressed GST protein was found to be localised in the bacterial membrane as determined by measuring catalytic activity using CDNB and cumene hydroperoxide substrates, SDS-PAGE and Western blot analysis. We have demonstrated the cloning and expression of full length cDNA for MGST from mouse liver and have characterised the functionally active product as MGST protein. These results should facilitate studies on the role of MGST in the regulation of chemical carcinogenesis and in the prevention of oxidative stress caused by endogenous and exogenous chemicals.

Original languageEnglish
Pages (from-to)645-649
Number of pages5
JournalOncology Reports
Volume7
Issue number3
DOIs
Publication statusPublished - 2000

Keywords

  • Bacterial expression
  • Microsomal GST
  • Mouse liver
  • cDNA cloning

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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