| Phenotype details |
see paper; ..., severe global developmental delay (HP:0001263), profound intellectual disability (HP:0001249), microcephaly (HP:0000252), early-onset epilepsy (HP:0001250), progressive spastic quadriplegia, opisthotonos (HP:0001257), irritability (HP:0000737), no optic atrophy (-HP:0001138); abnormal brain morphology (HP:0012443), normal early in life followed by cerebellar, cerebral and corpus callosum atrophy; no cholestasis (-HP:0001396) |