Members of this family adopt a structure consisting of alpha-alpha superhelix. They are predominantly found in clathrin, where they act as a heavy-chain linker domain [1].

1: Two distinct interaction motifs in amphiphysin bind two independent sites on the clathrin terminal domain beta-propeller. Miele AE, Watson PJ, Evans PR, Traub LM, Owen DJ; Nat Struct Mol Biol. 2004;11:242-248. PMID:14981508