Mutations in another SMY2-type GYF protein GIGYF2 (Grb10-Interacting GYF Protein 2) have debatably been reported to associate with Parkinson's disease (Lautier et al., 2008; Guo et al., 2009; Wang et al., 2010, 2011; Zhang et al., 2015). This evidence concerns the gene GIGYF2 and Parkinson disease.