Carbohydrate sulfotransferase 6 (CHST6)

Sulfotransferase that uses 3'-phospho-5'-adenylyl sulfate (PAPS) as sulfonate donor to catalyze the transfer of sulfate to position 6 of non-reducing N-acetylglucosamine (GlcNAc) residues of keratan. Mediates sulfation of keratan in cornea.

Keratan sulfate plays a central role in maintaining corneal transparency. Acts on the non-reducing terminal GlcNAc of long and short carbohydrate substrates that have poly-N- acetyllactosamine structures.