This family contains the SCIMP proteins which are a a transmembrane adaptor protein involved in major histocompatibility complex class II signaling [1].

1: SCIMP, a transmembrane adaptor protein involved in major histocompatibility complex class II signaling. Draber P, Vonkova I, Stepanek O, Hrdinka M, Kucova M, Skopcova T, Otahal P, Angelisova P, Horejsi V, Yeung M, Weiss A, Brdicka T; Mol Cell Biol. 2011;31:4550-4562. PMID:21930792