A novel method for creating a synthetic L-DOPA proteome and in vitro evidence of incorporation.

Proteinopathies are protein misfolding diseases that have an underlying factor that effect the conformation of proteoforms. A factor hypothesised to play a role in these diseases is the incorporation of non-protein amino acids into proteins, with a key example being the therapeutic drug levodopa. The presence of levodopa as a protein constituent has been explored in several studies but it has not been examined in a global proteomic manner. This paper provides a proof-of-concept method for enzymatically creating levodopa containing proteins using the enzyme tyrosinase, provides spectral evidence of in vitro incorporation and the induction of the unfolded protein response due to levodopa.