SMN also binds to fragile X mental retardation protein (FMRP), KH-type splicing regulatory protein (KSRP) and fused in sarcoma/translocated in liposarcoma (FUS/TLS), which are important for miRNA biogenesis and function (Gubitz et al., 2004; Piazzon et al., 2008; Tadesse et al., 2008; Trabucchi et al., 2009; Akten et al., 2011; Fallini et al., 2011, 2014; Hubers et al., 2011; Yamazaki et al., 2012). The gene discussed is FMR1; the disease is sarcoma.