UAS regulates expression of the Csp-PC isoform containing a single amino acid deletion of I118, which is analogous to the single amino acid deletion L116Δ in Hsap\DNAJC5, which is causative of neuronal ceroid lipofuscinosis CLN4.
Analogous L116Delta mutation in human DNAJC5 implicated in neuronal ceroid lipofuscinosis 4B; mutation carried on in vitro construct.