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 1 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.
^Rubio ME, Curcio C, Chauvet N, Brusés JL (December 2005). "Assembly of the N-cadherin complex during synapse formation involves uncoupling of p120-catenin and association with presenilin 1". Mol. Cell. Neurosci. 30 (4): 611–23. doi:10.1016/j.mcn.2005.06.005. PMID16456928.