Download MendeleyStructural basis for detoxification and oxidative stress protection in membranes.
Holm, P.J., Bhakat, P., Jegerschold, C., Gyobu, N., Mitsuoka, K., Fujiyoshi, Y., Morgenstern, R., Hebert, H.(2006) J Mol Biol 360: 934-945
- PubMed: 16806268
- DOI: https://doi.org/10.1016/j.jmb.2006.05.056
- Primary Citation of Related Structures:
2H8A - PubMed Abstract:
Synthesis of mediators of fever, pain and inflammation as well as protection against reactive molecules and oxidative stress is a hallmark of the MAPEG superfamily (membrane associated proteins in eicosanoid and glutathione metabolism). The structure of a MAPEG member, rat microsomal glutathione transferase 1, at 3.2 A resolution, solved here in complex with glutathione by electron crystallography, defines the active site location and a cytosolic domain involved in enzyme activation. The glutathione binding site is found to be different from that of the canonical soluble glutathione transferases. The architecture of the homotrimer supports a catalytic mechanism involving subunit interactions and reveals both cytosolic and membraneous substrate entry sites, providing a rationale for the membrane location of the enzyme.
Organizational Affiliation:
Department of Biosciences and Nutrition, Karolinska Institutet and School of Technology and Health, Royal Institute of Technology, SE-14157 Huddinge, Sweden.
