This domain family is found in eukaryotes, and is approximately 220 amino acids in length. The family is found in association with Pfam:PF02141, Pfam:PF03456, Pfam:PF03455. This family is the middle region of SBF2, a member of the myotubularin family. Myotubularin-related proteins have been suggested to work in phosphoinositide-mediated signalling events that may also convey control of myelination. Mutations of SBF2 are implicated in Charcot-Marie-Tooth disease.

1: Mutation of the SBF2 gene, encoding a novel member of the myotubularin family, in Charcot-Marie-Tooth neuropathy type 4B2/11p15. Senderek J, Bergmann C, Weber S, Ketelsen UP, Schorle H, Rudnik-Schoneborn S, Buttner R, Buchheim E, Zerres K; Hum Mol Genet. 2003;12:349-356. PMID:12554688