The Lyr motif found in the LYR-motif containing protein family is similar to that found in the sacchromyces cerevisiae protein ISD11, an iron-sulfur protein in the mitochondria that is thought to play a role in iron homeostasis. No known function has been assigned to LYRM2, although LYRM1 is thought to be involved in preadipocyte progression and LYRM3 has been suggested to be a candidate gene for the branchio-oto-renal (BOR) syndrome.