Probably involved in peroxisome formation or maintenance as well as in amino acid metabolism. Peroxisomal targeting signal 1 (PTS1) is a tripeptide located at the C-terminus of more than 95% of all peroxisomal matrix proteins. The prototypical PTS1 is the terminal tripeptide SKL (serine-lysine-leucine) but the consensus of PTS1 is defined as [S/A/H/C/E/P/Q/V] [K/R/H/Q] [L/F]. However, this description of the PTS1 consensus must probably be expanded beyond the terminal tripeptide. Impairs growth on oleate as well as on the non-fermentable carbon sources ethanol and acetate (PubMed:27392156). Leads to increased level in threonine, serine, valine, isoleucine and histidine; as well as a reduction in citrulline, tyrosine and phenylalanine (PubMed:27392156). Present with 1890 molecules/cell in log phase SD medium. Belongs to the PXP2 family.