In:
The Journal of Cell Biology, Rockefeller University Press, Vol. 173, No. 6 ( 2006-06-19), p. 963-974
Abstract:
Target of rapamycin (TOR) is a central regulator of cellular and organismal growth in response to nutrient conditions. In a genetic screen for novel TOR interactors in Drosophila melanogaster, we have identified the clathrin-uncoating ATPase Hsc70-4, which is a key regulator of endocytosis. We present genetic evidence that TOR signaling stimulates bulk endocytic uptake and inhibits the targeted endocytic degradation of the amino acid importer Slimfast. Thus, TOR simultaneously down-regulates aspects of endocytosis that inhibit growth and up-regulates potential growth-promoting functions of endocytosis. In addition, we find that disruption of endocytosis leads to changes in TOR and phosphatidylinositol-3 kinase activity, affecting cell growth, autophagy, and rapamycin sensitivity. Our data indicate that endocytosis acts both as an effector function downstream of TOR and as a physiologically relevant regulator of TOR signaling.
Type of Medium:
Online Resource
ISSN:
1540-8140
,
0021-9525
DOI:
10.1083/jcb.200511140
Language:
English
Publisher:
Rockefeller University Press
Publication Date:
2006
detail.hit.zdb_id:
1421310-2
SSG:
12
Permalink