Pontocerebellar hypoplasia (PCH), a rare neurodevelopmental disorder, is associated with changes in genes coding for the tRNA splicing endonuclease (TSEN). This multicomponent enzyme is involved in generating essential building blocks for protein synthesis, a process that is crucial to establish and maintain the function of healthy cells. TSEN is found in every cell of the human body but the effect of the PCH-linked mutations only manifests in specific regions of the brain; a phenomenon not understood at all yet.
