Besides its potential role as a regulator of neurogenesis, midnolin has been reported to potentially serve as: a transcription factor regulating development via control of mRNA transport [11]; a binding partner and negative regulator, via its ubiquitin-like domain, of glucokinase enzyme in pancreatic beta cells [9]; and a regulator of parkin expression and a marker associated with Parkinson’s disease [10]. The gene discussed is GCK; the disease is Parkinson disease.