This domain is found at the C terminus of some GTPase-activating proteins (also known as GAP) found in animals, including Disabled homolog 2-interacting protein (DAB2P). This region is found associated with Pfam:PF00616 and Pfam:PF00168, and includes a coiled-coil domain that forms a parallel trimer in solution with one helical strand from each monomer [1].

1: Phase Transition in Postsynaptic Densities Underlies Formation of Synaptic Complexes and Synaptic Plasticity. Zeng M, Shang Y, Araki Y, Guo T, Huganir RL, Zhang M; Cell. 2016;166:1163-1175. PMID:27565345