This gene encodes a member of the peptidase S10 family of serine carboxypeptidases. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed to generate two chains that comprise the heterodimeric active enzyme. This enzyme possesses deamidase, esterase and carboxypeptidase activities and acts as a scaffold in the lysosomal multienzyme complex. Mutations in this gene are associated with galactosialidosis.,CTSA,GLB2,GSL,NGBE,PPCA,PPGB,Epigenetics & Nuclear Signaling,Transcription Factors,Signal Transduction,Endocrine & Metabolism,Amino acid metabolism,CTSA