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. Isoform 2 may facilitate PARK2 transport into the mitochondria. In collaboration with PARK2, isoform 2 may enhance cell viability and protect cells from oxidative stress.
Kitagawa H., J. Biol. Chem. 278:23666-23671(2003).
Yada T., J. Biol. Chem. 278:30235-30247(2003).
Clark H.F., Genome Res. 13:2265-2270(2003)