Chondroitin sulfate synthase 1 (CHSY1)

Has both beta-1,3-glucuronic acid and beta-1,4-N- acetylgalactosamine transferase activity. Transfers glucuronic acid (GlcUA) from UDP-GlcUA and N-acetylgalactosamine (GalNAc) from UDP-GalNAc to the non-reducing end of the elongating chondroitin polymer.

Involved in the negative charge of osteogenesis likely through the modulation of NOTCH signaling. .