Dissociation of beta-catenin from Axin and association of beta catenin with phospho-(20 aa) APC in the detruction complex

Stable Identifier
R-HSA-195280
Type
Reaction [transition]
Species
Homo sapiens
Compartment
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The phosphorylation of the 20 aa repeats in APC results in an increase in affinity for beta-catenin (Ha et al., 2004, Xing et al., 2004; Liu et al., 2006). The binding site of phospho -(20 aa) APC on beta-catenin overlaps the binding site of Axin on beta catenin. In addition, phosphorylated APC prevents the association of Axin with beta-catenin (Ha et al., 2004, Xing et al., 2004). In this model, phosphorylated APC may compete with Axin for beta-catenin binding, resulting in dissociation of the Axin:beta-catenin interaction in the destruction complex (see Kimelman and Xu 2006).

Literature References
PubMed ID Title Journal Year
15327769 Crystal structure of a beta-catenin/APC complex reveals a critical role for APC phosphorylation in APC function

Xing, Y, Clements, WK, Le Trong, I, Hinds, TR, Stenkamp, R, Kimelman, D, Xu, W

Mol Cell 2004
Participants
Participant Of
Orthologous Events
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Created