Proliferative versus apoptotic functions of caspase-8 Hetero or homo: the caspase-8 dimer controls cell fate.
Biochim Biophys Acta
; 1824(1): 113-22, 2012 Jan.
Article
in En
| MEDLINE
| ID: mdl-21704196
ABSTRACT
Caspase-8, the initiator of extrinsically-triggered apoptosis, also has important functions in cellular activation and differentiation downstream of a variety of cell surface receptors. It has become increasingly clear that the heterodimer of caspase-8 with the long isoform of cellular FLIP (FLIP(L)) fulfills these pro-survival functions of caspase-8. FLIP(L), a catalytically defective caspase-8 paralog, can interact with caspase-8 to activate its catalytic function. The caspase-8/FLIP(L) heterodimer has a restricted substrate repertoire and does not induce apoptosis. In essence, caspase-8 heterodimerized with FLIP(L) prevents the receptor interacting kinases RIPK1 and -3 from executing the form of cell death known as necroptosis. This review discusses the latest insights in caspase-8 homo- versus heterodimerization and the implication this has for cellular death or survival. This article is part of a Special Issue entitled Proteolysis 50 years after the discovery of lysosome.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Apoptosis
/
Cell Proliferation
/
Caspase 8
/
Protein Multimerization
Limits:
Animals
/
Humans
Language:
En
Journal:
Biochim Biophys Acta
Year:
2012
Document type:
Article
Affiliation country:
United States