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Pgant8

Gene
Pgant8
Protein
Polypeptide N-acetylgalactosaminyltransferase 8
Organism
Drosophila melanogaster
Length
590 amino acids
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. It can both act as a peptide transferase that transfers GalNAc onto unmodified peptide substrates, and as a glycopeptide transferase that requires the prior addition of a GalNAc on a peptide before adding additional GalNAc moieties. Prefers both EA2 and the diglycosylated Muc5AC-3/13 as substrates, albeit at very low levels fro Muc5AC-3/13.
Similarity
Belongs to the glycosyltransferase 2 family. GalNAc-T subfamily.
Mass
68.1 kDa
Sequence
MCLDIWRHKKKVLPLLLLMAIGSIIYYLYTLKLEGERDESATSTTSRLERDIRDLQAVFESEVIPDLGALGRPARGNWTEEQLEAIAKSQRETGYNAWLSKRISPERSLYDMRHRSCKKLKYPMEKLPSVSVVITYHNEEASVLLRTLSSLRSRTPIQLLREVILVDDGSTQADEKLNDFIKIKFLNMVQHRRITTQVGLMHARVVGAELALADVLVFLDSHVEVTKGWLEPLIAPILEDNRTCTTPIIDTIDFDNFAYRRGKPSRGFFNWEFNYIQLPLLKEEAVAMPAPHKNPIMNGGLFAIGREWFSELGGYDKGLKIWGAEQFELSLKLWLCGGQILEVPCSRVGHLFRDGNFQIRYTNKDKNSEKKLISRNYRRVAEIWLDEYKDKLFANMPHLTVIPVGNLAEQRDLKNRLHCKPFKWFLDNLATDFLNLYPILDPAEYASGVLQSISSPKLCLDRKDPSHGQPKLAPCSSDHVFPSPEQYWSLTNHRELRSGFYCLEVRNHGVNVHIYQCHGQSGNQFWSFDSKTHQVISGQQQNFRHCLEAQPELNAVTSSVCDPKNHKQQWKFGYLNSQRLQHFWDNVKTQ