The present disclosure relates to compounds, compositions, and methods for the inducing neurodegenerative disease pathologies. In one aspect, disclosed herein is a nucleotide sequence encoding a chimeric polypeptide, comprising: a first nucleotide sequence encoding a light-induced oligomerization domain and a second nucleotide sequence encoding a neurodegenerative disease in target protein. Disclosed herein is a method of inducing a neurodegenerative disease pathology in a cell, comprising the steps: introducing into the cell an expression vector encoding a chimeric polypeptide, comprising: a first nucleotide sequence encoding a light-induced oligomerization domain and a second nucleotide sequence encoding a low complexity domain from a neurodegenerative disease target protein, wherein the first nucleotide sequence is operably linked to a promoter; expressing the chimeric polypeptide; and inducing oligomerization of the chimeric polypeptide by stimulation with blue light.