WDR4 and microcephalic primordial dwarfism: Mutations, knockouts, and overexpression of m7G-related genes, such as WD repeat domain 4 (WDR4), lead to microcephalic primordial dwarfism (Sauna and Kimchi-Sarfaty, 2011), Nervous system damage (Lin et al., 2018), and impairment of learning and memory abilities (Pereira et al., 2009).