TOR SIGNALING AND CONTROL OF CELL-GROWTH

TOR, phosphatidylinositol 3-kinase, p70(s6k), and 4E-BP1 have recently emerged as components of a major signalling pathway that is dedicated to protein translation and thus to cell growth. This pathway appears to be conserved, at least in part, in yeast, slime molds, plants, flie s, and mammals. TOR and phosphatidylinositol 3-kinase control p70(s6k) and 4E-BP1, which, in turn, directly control the translation initiati on machinery.