The precise function of this protein family is unknown, however studies have shown it undergoes Protein N-myristoylation; a type of lipid modification in eukaryotic and viral proteins. Protein N-myristoylation is usually an irreversible co-translational protein modification which is useful in cell signal transduction pathways [1]. This indicates that FAM131 may have some sort of role in cell signalling due to its ability to be myristoylated. This family of proteins is found in eukaryotes and are typically between 257 and 361 amino acids in length.

1: Strategy for comprehensive identification of human N-myristoylated proteins using an insect cell-free protein synthesis system. Suzuki T, Moriya K, Nagatoshi K, Ota Y, Ezure T, Ando E, Tsunasawa S, Utsumi T; Proteomics. 2010;10:1780-1793. PMID:20213681