Background: FLIP

FLIP (Flice-like Inhibitory Protein), also known as I-FLICE, CASPER, and FLAME-1, is an apoptosis inhibitory protein with architecture similar to that of Caspases-8 and -10. Both of the FLIP isoforms, Long (L) and Short (S), contain two death effector domains (DED). FLIP(L) has a C-terminal Caspase-like protease domain which lacks both a catalytic active site and residues that form a substrate-binding pocket. FLIP(S) and FLIP(L) interact with the adaptor molecule FADD, and potently inhibit apoptosis initiated by Fas Ligand/TNF signaling pathways.

• Long Name:

  FLICE Inhibitory Proteins

• Entrez Gene IDs:

  8837 (Human); 12633 (Mouse)

• Alternate Names:

  CASHFADD-like antiapoptotic molecule 1; CASP8 and FADD-like apoptosis regulator; CASP8AP1; Caspase homolog; Caspase-eight-related protein; Caspase-like apoptosis regulatory protein; caspase-related inducer of apoptosis; CASPER; CasperFLAME1; Cellular FLICE-like inhibitory protein; CFLAR; c-FLIPR; c-FLIPS; CLARPMACH-related inducer of toxicity; FADD-like apoptotic molecule; FLAME; FLAME-1; FLIP; I-FLICE; I-FLICEMRITc-FLIPFLIPc-FLIPL; Inhibitor of FLICE; usurpin beta; Usurpin