Dynein heavy chains interact with other heavy chains to form dimers, and with intermediate chain-light chain complexes to form a basal cargo binding unit [1]. The region featured in this family includes the sequences implicated in mediating these interactions [2]. It is thought to be flexible and not to adopt a rigid conformation [1].

1: AAA domains and organization of the dynein motor unit. King SM; J Cell Sci 2000;113:2521-2526. PMID:10862709

2: Interaction mapping of a dynein heavy chain. Identification of dimerization and intermediate-chain binding domains. Habura A, Tikhonenko I, Chisholm RL, Koonce MP; J Biol Chem 1999;274:15447-15453. PMID:10336435