The function of this family of transmembrane proteins has not, as yet, been determined. However, it is thought to be a therapeutic target for ovine lentivirus infection [1]. This family of proteins is found in eukaryotes and members are typically between 138 and 320 amino acids in length.

1: Reduced lentivirus susceptibility in sheep with TMEM154 mutations. Heaton MP, Clawson ML, Chitko-Mckown CG, Leymaster KA, Smith TP, Harhay GP, White SN, Herrmann-Hoesing LM, Mousel MR, Lewis GS, Kalbfleisch TS, Keen JE, Laegreid WW; PLoS Genet. 2012;8:e1002467. PMID:22291605