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Yin Yang 1 (YY1) is a multi-functional transcription factor that regulates gene expression in a range of cell types, including neurons.It controls neuronal differentiation, as well as neuronal specification and migration during the development of the mammalian nervous system.Besides, YY1 also mediates the transcription of genes that are required for neuronal survival.An impairment of the transcriptional function of YY1 causes neuronal death.This review summarizes recent research findings that unveil the dysfunction of YY1 in multiple neurodegenerative disorders.The expression of disease proteins perturbs the function of YY1 via distinct molecular mechanisms, including recruitment to protein aggregates, protein degradation and aberrant nuclear/cytoplasmic shuttling.Understanding the pathogenic roles of YY1 will further broaden our knowledge of the disease mechanisms in distinct neurodegenerative disorders.