The function of SGSH (N-sulfoglucosamine sulfohydrolase, ENSG00000181523) is as follows. Catalyzes a step in lysosomal heparan sulfate degradation. {ECO:0000269|PubMed:15146460, ECO:0000269|PubMed:24816101, ECO:0000269|PubMed:7493035}.