Delta-1-catenin and Delta-2-catenin are members of a subfamily of proteins with ten Armadillo-repeats. Delta-2-catenin is expressed in the brain where it is important for normal cognitive development. Like beta-catenin and gamma-catenin, delta-catenins seem to interact with presenilins. These catenin-presenilin interaction have implications for cadherin function and regulation of cell-to-cell adhesion.
While beta-catenin acts as a transcription reglatory protein in the Wnt/TCF pathway, delta-catenin has been implicated as a regulator of the NF-κB transcription factor.
Palmitoylation of delta-catenin seems to coordinate activity-dependent changes in synaptic adhesion molecules, synapse structure, and receptor localizations that are involved in memory formation.
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^Brigidi GS, Sun Y, Beccano-Kelly D, Pitman K, Jobasser M, Borgland S L, Milnerwood A J, Bamji S X (January 23, 2014). "Palmitoylation of [delta]-catenin by DHHC5 mediates activity-induced synapse plasticity". Nature Neuroscience. doi:10.1038/nn.3657.