Numb controls E-cadherin endocytosis through p120 catenin with aPKC

We found that Numb directly binds to p120. Numb depletion impaired E-cadherin internalization. aPKC phosphorylated Numb and inhibited its association with p120. In the Numb-depleted cells, the phosphomimetic Numb mutant failed to restore E-cadherin internalization. We propose the mode of action of Numb for intercellular adhesion downstream of aPKC.

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