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GALNT18 belongs to Y-subfamity, cloned by Li (Zhang). WGGE motif is replaced with YGGE. This isozyme does not exhibit significant enzyme activity. This may be an activator or regulator protein for other GALNTs.
GALNT15 GALNTL4 GalNAc-T15 GalNAc-T18 O-glycan Tn-antigen mucin tumor marker

UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase

GGDB SymbolGALNT18
Alias GALNTL4    details
DesignationUDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase 18
OrganismHomo sapiens
GeneID 374378
HGNC 30488
mRNA NM_198516      
Protein NP_940918.2      
map11p15.3
EC#
CAZy GT27   
OMIM 615136   
This page does not indicate all of the enzymatic reaction, and expression of "GALNT18".