This family consists of several bacterial ribosomal RNA methyltransferase (aminoglycoside-resistance methyltransferase) proteins [1,2].

1: Analysis of the self-defense gene (fmrO) of a fortimicin A (astromicin) producer, Micromonospora olivasterospora: comparison with other aminoglycoside-resistance-encoding genes. Ohta T, Hasegawa M; Gene 1993;127:63-69. PMID:8486289

2: Cloning and characterization of gentamicin-resistance genes from Micromonospora purpurea and Micromonospora rosea. Kelemen GH, Cundliffe E, Financsek I; Gene 1991;98:53-60. PMID:2013410