Journal article

Glutathione transferase P1-1: self-preservation of an anti-cancer enzyme

G Ricci, AM Caccuri, M Lo Bello, MW Parker, M Nuccetelli, P Turella, L Stella, EE Di Iorio, G Federici

BIOCHEMICAL JOURNAL | PORTLAND PRESS LTD | Published : 2003

Abstract

Self-preservation is a typical property of living organisms, observed in the simplest prokaryotic cell as well as in the more complex pluricellular organisms. Surprisingly we found a self-preservation mechanism operating at the level of a single enzyme. Human glutathione transferase P1-1 operates in such a way towards either killer compounds (competitive and irreversible inhibitors) or physical factors (temperature and UV-rays), which could suppress its detoxicating and anti-cancer activity in the cell. This property, here termed 'co-operative self-preservation', is based on a structural intersubunit communication, by which one subunit, as a consequence of an inactivating modification, trigg..

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