Members of this family are probably coiled-coil proteins that are similar to the CHD5 (Congenital heart disease 5) protein. In Saccharomyces cerevisiae this protein localises to the ER and is thought to play a homeostatic role [2].

1: Identification and characterization of a new human cDNA from chromosome 21q22.3 encoding a basic nuclear protein. Egeo A, Mazzocco M, Sotgia F, Arrigo P, Oliva R, Bergonon S, Nizetic D, Rasore-Quartino A, Scartezzini P; Hum Genet 1998;102:289-293. PMID:9544840

2: Cooperative function of the CHD5-like protein Mdm39p with a P-type ATPase Spf1p in the maintenance of ER homeostasis in Saccharomyces cerevisiae. Ando A, Suzuki C; Mol Genet Genomics 2005; [Epub ahead of print] PMID:15909163