Proteins in this family include an accessory subunit of the higher eukaryotic NADH dehydrogenase complex. In Saccharomyces cerevisiae, the Isd11 protein (Swiss:Q6Q560) has been shown to play a role in Fe/S cluster biogenesis in mitochondria [1][2]. We have named this family LYR after a highly conserved tripeptide motif close to the N-terminus of these proteins.

1: The Nfs1 interacting protein Isd11 has an essential role in Fe/S cluster biogenesis in mitochondria. Adam AC, Bornhovd C, Prokisch H, Neupert W, Hell K; EMBO J. 2006;25:174-183. PMID:16341090

2: Essential role of Isd11 in mitochondrial iron-sulfur cluster synthesis on Isu scaffold proteins. Wiedemann N, Urzica E, Guiard B, Muller H, Lohaus C, Meyer HE, Ryan MT, Meisinger C, Muhlenhoff U, Lill R, Pfanner N; EMBO J. 2006;25:184-195. PMID:16341089