The TRAPPC9 gene, also known as NIBP (NIK-and-IKK2-binding protein) or MRT13 (autosomal recessive mental retardation 13), plays a pivotal role in neurodevelopment (Abbasi et al., 2017; Hu et al., 2023). The gene discussed is TRAPPC9; the disease is autosomal recessive non-syndromic intellectual disability.