This family is found in eukaryotes. It represents the ATPase protein associated with ABC transporters (PAAT) and related proteins. PAAT is formed of a nucleotide-binding domain (NBD)-like domain and a signal for intramitochondrial sorting. PAAT interacts with the mitochondrial inner membrane ABC proteins: ABCB7, ABCB8 and ABCB10. It is involved in maintenance of mitochondrial homeostasis and cell survival [1].

1: PAAT, a novel ATPase and trans-regulator of mitochondrial ABC transporters, is critically involved in the maintenance of mitochondrial homeostasis. Yang X, Yang J, Li L, Sun L, Yi X, Han X, Si W, Yan R, Chen Z, Xie G, Li W, Shang Y, Liang J; FASEB J. 2014;28:4821-4834. PMID:25063848