Some proteins in this family appear to be important in wyosine base formation in a subset of phenylalanine specific tRNAs. It has been proposed that they participates in converting tRNA(Phe)-m(1)G(37) to tRNA(Phe)-yW [1].

1: Discovery of a gene family critical to wyosine base formation in a subset of phenylalanine-specific transfer RNAs. Waas WF, de Crecy-Lagard V, Schimmel P; J Biol Chem. 2005;280:37616-37622. PMID:16162496