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Polypeptide N-acetylgalactosaminyltransferase 1
Protein GALNT1 PDB 1xhb.png
PDB rendering based on 1xhb.
Available structures
PDB Ortholog search: PDBe, RCSB
Symbols GALNT1 ; GALNAC-T1
External IDs OMIM602273 MGI894693 HomoloGene8469 GeneCards: GALNT1 Gene
EC number
RNA expression pattern
PBB GE GALNT1 201722 s at tn.png
PBB GE GALNT1 201723 s at tn.png
PBB GE GALNT1 201724 s at tn.png
More reference expression data
Species Human Mouse
Entrez 2589 14423
Ensembl ENSG00000141429 ENSMUSG00000000420
UniProt Q10472 O08912
RefSeq (mRNA) NM_020474 NM_001160404
RefSeq (protein) NP_065207 NP_001153876
Location (UCSC) Chr 18:
33.16 – 33.29 Mb
Chr 18:
24.21 – 24.29 Mb
PubMed search [1] [2]

Polypeptide N-acetylgalactosaminyltransferase 1 is an enzyme that in humans is encoded by the GALNT1 gene.[1][2][3]

This gene encodes a member of the UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase (GalNAc-T) family of enzymes. GalNAc-Ts initiate mucin-type O-linked glycosylation in the Golgi apparatus by catalyzing the transfer of GalNAc to serine and threonine residues on target proteins. They are characterized by an N-terminal transmembrane domain, a stem region, a lumenal catalytic domain containing a GT1 motif and Gal/GalNAc transferase motif, and a C-terminal ricin/lectin-like domain. GalNAc-Ts have different, but overlapping, substrate specificities and patterns of expression. Transcript variants derived from this gene that utilize alternative polyA signals have been described in the literature.[3]


  1. ^ White T, Bennett EP, Takio K, Sorensen T, Bonding N, Clausen H (Dec 1995). "Purification and cDNA cloning of a human UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase". J Biol Chem 270 (41): 24156–65. doi:10.1074/jbc.270.41.24156. PMID 7592619. 
  2. ^ Tenno M, Toba S, Kezdy FJ, Elhammer AP, Kurosaka A (Aug 2002). "Identification of two cysteine residues involved in the binding of UDP-GalNAc to UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 1 (GalNAc-T1)". Eur J Biochem 269 (17): 4308–16. doi:10.1046/j.1432-1033.2002.03123.x. PMID 12199709. 
  3. ^ a b "Entrez Gene: GALNT1 UDP-N-acetyl-alpha-D-galactosamine:polypeptide N-acetylgalactosaminyltransferase 1 (GalNAc-T1)". 

Further reading[edit]

  • Paulson JC, Colley KJ (1989). "Glycosyltransferases. Structure, localization, and control of cell type-specific glycosylation.". J. Biol. Chem. 264 (30): 17615–8. PMID 2681181. 
  • Bennett EP, Hassan H, Clausen H (1996). "cDNA cloning and expression of a novel human UDP-N-acetyl-alpha-D-galactosamine. Polypeptide N-acetylgalactosaminyltransferase, GalNAc-t3.". J. Biol. Chem. 271 (29): 17006–12. doi:10.1074/jbc.271.29.17006. PMID 8663203. 
  • Meurer JA, Naylor JM, Baker CA et al. (1996). "cDNA cloning, expression, and chromosomal localization of a human UDP-GalNAc:polypeptide, N-acetylgalactosaminyltransferase.". J. Biochem. 118 (3): 568–74. PMID 8690719. 
  • Meurer JA, Drong RF, Homa FL et al. (1996). "Organization of a human UDP-GalNAc:polypeptide, N-acetylgalactosaminyltransferase gene and a related processed pseudogene.". Glycobiology 6 (2): 231–41. doi:10.1093/glycob/6.2.231. PMID 8727794. 
  • Takai S, Hinoda Y, Adachi T et al. (1997). "A human UDP-GalNAc: polypeptide, N-acetylgalactosaminyltransferase type 1 gene is located at the chromosomal region 18q12.1.". Hum. Genet. 99 (3): 293–4. doi:10.1007/s004390050359. PMID 9050910. 
  • Wandall HH, Hassan H, Mirgorodskaya E et al. (1997). "Substrate specificities of three members of the human UDP-N-acetyl-alpha-D-galactosamine:Polypeptide N-acetylgalactosaminyltransferase family, GalNAc-T1, -T2, and -T3.". J. Biol. Chem. 272 (38): 23503–14. doi:10.1074/jbc.272.38.23503. PMID 9295285. 
  • Müller S, Goletz S, Packer N et al. (1997). "Localization of O-glycosylation sites on glycopeptide fragments from lactation-associated MUC1. All putative sites within the tandem repeat are glycosylation targets in vivo.". J. Biol. Chem. 272 (40): 24780–93. doi:10.1074/jbc.272.40.24780. PMID 9312074. 
  • Röttger S, White J, Wandall HH et al. (1998). "Localization of three human polypeptide GalNAc-transferases in HeLa cells suggests initiation of O-linked glycosylation throughout the Golgi apparatus.". J. Cell. Sci. 111 (1): 45–60. PMID 9394011. 
  • Bennett EP, Weghuis DO, Merkx G et al. (1998). "Genomic organization and chromosomal localization of three members of the UDP-N-acetylgalactosamine: polypeptide N-acetylgalactosaminyltransferase family.". Glycobiology 8 (6): 547–55. doi:10.1093/glycob/8.6.547. PMID 9592121. 
  • "Toward a complete human genome sequence.". Genome Res. 8 (11): 1097–108. 1999. doi:10.1101/gr.8.11.1097. PMID 9847074. 
  • Tenno M, Saeki A, Kézdy FJ et al. (2003). "The lectin domain of UDP-GalNAc:polypeptide N-acetylgalactosaminyltransferase 1 is involved in O-glycosylation of a polypeptide with multiple acceptor sites.". J. Biol. Chem. 277 (49): 47088–96. doi:10.1074/jbc.M207369200. PMID 12364335. 
  • Strausberg RL, Feingold EA, Grouse LH et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932. 
  • Kinarsky L, Suryanarayanan G, Prakash O et al. (2004). "Conformational studies on the MUC1 tandem repeat glycopeptides: implication for the enzymatic O-glycosylation of the mucin protein core.". Glycobiology 13 (12): 929–39. doi:10.1093/glycob/cwg109. PMID 12925576. 
  • Brokx RD, Revers L, Zhang Q et al. (2004). "Nuclear magnetic resonance-based dissection of a glycosyltransferase specificity for the mucin MUC1 tandem repeat.". Biochemistry 42 (47): 13817–25. doi:10.1021/bi0353070. PMID 14636048. 
  • Gerhard DS, Wagner L, Feingold EA et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.