p62 is a key regulator of nutrient sensing in the mTORC1 pathway.
Mol Cell
; 44(1): 134-46, 2011 Oct 07.
Article
in En
| MEDLINE
| ID: mdl-21981924
ABSTRACT
The signaling adaptor p62 is a critical mediator of important cellular functions, owing to its ability to establish interactions with various signaling intermediaries. Here, we identify raptor as an interacting partner of p62. Thus, p62 is an integral part of the mTORC1 complex and is necessary to mediate amino acid signaling for the activation of S6K1 and 4EBP1. p62 interacts in an amino acid-dependent manner with mTOR and raptor. In addition, p62 binds the Rags proteins and favors formation of the active Rag heterodimer that is further stabilized by raptor. Interestingly, p62 colocalizes with Rags at the lysosomal compartment and is required for the interaction of mTOR with Rag GTPases in vivo and for translocation of the mTORC1 complex to the lysosome, a crucial step for mTOR activation.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Proteins
/
Adaptor Proteins, Signal Transducing
/
Heat-Shock Proteins
Limits:
Animals
/
Humans
Language:
En
Journal:
Mol Cell
Journal subject:
BIOLOGIA MOLECULAR
Year:
2011
Type:
Article
Affiliation country:
United States