This region is found at the C-terminus of Caskin proteins. Caskins are CASK-binding synaptic scaffolding proteins [1]. Part of this region is predicted to be in coiled-coil conformation. Its function is not known.

1: CASK participates in alternative tripartite complexes in which Mint 1 competes for binding with caskin 1, a novel CASK-binding protein. Tabuchi K, Biederer T, Butz S, Sudhof TC; J Neurosci. 2002;22:4264-4273. PMID:12040031