Figure 6.
Implications of the TRAF1/2: cIAP1/2 interaction
(A) Comparison of the TRAF2: cIAP2 interaction with the dimeric XIAP BIR1: TAB1 interaction. The TAB1-interacting surface of XIAP BIR1 overlaps with the TRAF2-interacting surface of cIAP BIR1. The dimerization interface of XIAP BIR1 is opposite of the above interface.
(B) Comparison of the TRAF2: cIAP2 interaction with the XIAP BIR3: Smac peptide interaction. Smac peptide is bound to the opposite side of the TRAF2: cIAP interface.
(C) The heterotrimer of TRAF1 and TRAF2 in complex with cIAP2, showing the ubiquitination sites on TRAF1.