This family contains the members of the old Pfam family DUF2006. Structural characterisation of family member Swiss:Q82US3 (from DUF2006 now merged into this family) has revealed a lipocalin-like fold with domain duplication.

1: Structure of the first representative of Pfam family PF09410 (DUF2006) reveals a structural signature of the calycin superfamily that suggests a role in lipid metabolism. Chiu HJ, Bakolitsa C, Skerra A, Lomize A, Carlton D, Miller MD, Krishna SS, Abdubek P, Astakhova T, Axelrod HL, Clayton T, Deller MC, Duan L, Feuerhelm J, Grant JC, Grzechnik SK, Han GW, Jaroszewski L, Jin KK, Klock HE, Knuth MW, Kozbial P, Kumar A, Marciano D, McMullan D, Morse AT, Nigoghossian E, Okach L, Paulsen J, Reyes R, Rife CL, van den Bedem H, Weekes D, Xu Q, Hodgson KO, Wooley J, Elsliger MA, Deacon AM, Godzik A, Lesley SA, Wilson IA; Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010;66:1153-1159. PMID:20944205