Protein
Polypeptide N-acetylgalactosaminyltransferase 3
Function
Catalyzes the initial reaction in O-linked oligosaccharide biosynthesis, the transfer of an N-acetyl-D-galactosamine residue to a serine or threonine residue on the protein receptor. Has activity toward HIV envelope glycoprotein gp120, EA2, Muc2 and Muc5. Glycosylates FGF23 (By similarity). Probably glycosylates fibronectin in vivo. May be involved in phosphate homeostasis.
Similarity
Belongs to the glycosyltransferase 2 family. GalNAc-T subfamily.
Sequence
MAHLKRLVKLHIKRHYHRKFWKLGAVIFFFLVVLILMQREVSVQYSKEESKMERNLKNKNKMLDFMLEAVNNIKDAMPKMQIGAPIKENIDVRERPCLQGYYTAAELKPVFDRPPQDSNAPGASGKPFKITHLSPEEQKEKERGETKHCFNAFASDRISLHRDLGPDTRPPECIEQKFKRCPPLPTTSVIIVFHNEAWSTLLRTVHSVLYSSPAILLKEIILVDDASVDDYLHEKLEEYIKQFSIVKIVRQQERKGLITARLLGAAVATAETLTFLDAHCECFYGWLEPLLARIAENYTAVVSPDIASIDLNTFEFNKPSPYGSNHNRGNFDWSLSFGWESLPDHEKQRRKDETYPIKTPTFAGGLFSISKKYFEHIGSYDEEMEIWGGENIEMSFRVWQCGGQLEIMPCSVVGHVFRSKSPHTFPKGTQVIARNQVRLAEVWMDEYKEIFYRRNTDAAKIVKQKSFGDLSKRFEIKKRLQCKNFTWYLNTIYPEAYVPDLNPVISGYIKSVGQPLCLDVGENNQGGKPLILYTCHGLGGNQYFEYSAQREIRHNIQKELCLHATQGVVQLKACVYKGHRTIAPGEQIWEIRKDQLLYNPLFKMCLSSNGEHPNLVPCDATDLLQKWIFSQND