catalytic activity:Transfers a beta-D-xylosyl residue from UDP-D-xylose to the serine hydroxy group of an acceptor protein substrate.,cofactor:Divalent cations.,function:Catalyzes the first step in biosynthesis of glycosaminoglycan. Transfers D-xylose from UDP-D-xylose to specific serine residues of the core protein. Initial enzyme in the biosynthesis of chondroitin sulfate and dermatan sulfate proteoglycans in fibroblasts and chondrocytes.,miscellaneous:Activity is strongly reduced in seminal plasma of unfertile men.,online information:GlycoGene database,pathway:Glycan metabolism; chondroitin sulfate biosynthesis.,pathway:Glycan metabolism; heparan sulfate biosynthesis.,PTM:Contains 7 disulfide bonds.,PTM:N-glycosylated.,similarity:Belongs to the glycosyltransferase 14 family. XylT subfamily.,subcellular location:Some fraction is also found in the extracellular space together with chondroitin sulfate proteoglycans, suggesting that it can be secreted.,subunit:Monomer.,tissue specificity:Widely expressed. Expressed at higher level in placenta, kidney and pancreas. Weakly expressed in skeletal muscle.,
Golgi apparatus membrane ; Single-pass type II membrane protein . Secreted . Detected predominantly in the Golgi apparatus. .
Widely expressed. Expressed at higher level in placenta, kidney and pancreas. Weakly expressed in skeletal muscle.
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