The short form of cellular FLIP (FLIP(S) or c-FLIPS) has two death effector domains DEDs, which can bind to FADD and caspase-8 (CASP8). FLIP(S) protects the cells from apoptosis by inhibiting the processing of caspase-8 at the receptor level (Scaffidi C et al. 1999; Micheau O et al 2001).
FLIP(S) is a short-lived protein which is sensitive to ubiquitination and proteasomal degradation (Poukkula M et al. 2005). Protein kinase C (PKC)- mediated phosphorylation of FLIP(S) at Ser193 was shown to prolongs the half-life of FLIP(S) by inhibiting its polyubiquitination (Kaunisto A et al. 2009).
Micheau, O, Lens, S, Gaide, O, Alevizopoulos, K, Tschopp, J
Scaffidi, C, Schmitz, I, Krammer, PH, Peter, ME
Kim, DJ, Park, C, Oh, B, Kim, YY
Pop, C, Oberst, A, Drag, M, Van Raam, BJ, Riedl, SJ, Green, DR, Salvesen, GS
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