CHEBI:53608 - O-(N-acetyl-α-D-galactosaminyl)-L-serine

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ChEBI Name O-(N-acetyl-α-D-galactosaminyl)-L-serine
ChEBI ID CHEBI:53608
ChEBI ASCII Name O-(N-acetyl-alpha-D-galactosaminyl)-L-serine
Definition A non-proteinogenic L-amino acid that is N-acetyl-α-D-galactosamine linked via an α glycosidic bond to the O at position 3 of L-serine.
Stars This entity has been manually annotated by the ChEBI Team.
Secondary ChEBI IDs CHEBI:46057
Supplier Information
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Formula C11H20N2O8
Net Charge 0
Average Mass 308.28510
Monoisotopic Mass 308.12197
InChI InChI=1S/C11H20N2O8/c1-4(15)13-7-9(17)8(16)6(2-14)21-11(7)20-3-5(12)10(18)19/h5-9,11,14,16-17H,2-3,12H2,1H3,(H,13,15)(H,18,19)/t5-,6+,7+,8-,9+,11-/m0/s1
InChIKey REDMNGDGDYFZRE-WKWISIMFSA-N
SMILES CC(=O)N[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1OC[C@H](N)C(O)=O
Roles Classification
Chemical Role(s): Bronsted base
A molecular entity capable of accepting a hydron from a donor (Bronsted acid).
(via organic amino compound )
Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
Biological Role(s): tumour antigen
An antigenic substance produced in tumour cells, which triggers an immune response in the host.
View more via ChEBI Ontology
ChEBI Ontology
Outgoing O-(N-acetyl-α-D-galactosaminyl)-L-serine (CHEBI:53608) has role tumour antigen (CHEBI:144829)
O-(N-acetyl-α-D-galactosaminyl)-L-serine (CHEBI:53608) is a L-serine derivative (CHEBI:84135)
O-(N-acetyl-α-D-galactosaminyl)-L-serine (CHEBI:53608) is a non-proteinogenic L-α-amino acid (CHEBI:83822)
Incoming O-(N-acetyl-α-D-galactosaminyl)-L-serine residue (CHEBI:53604) is substituent group from O-(N-acetyl-α-D-galactosaminyl)-L-serine (CHEBI:53608)
O-(N-acetyl-α-D-glucosaminyl)-L-serine residue (CHEBI:143279) is substituent group from O-(N-acetyl-α-D-galactosaminyl)-L-serine (CHEBI:53608)
IUPAC Name
O-(2-acetamido-2-deoxy-α-D-galactopyranosyl)-L-serine
Synonyms Sources
α-D-GalNAc-Ser ChEBI
GalNAc(α1→O)Ser JCBN
GalNac-α-1-O-serine ChEBI
GalNAcα1-Ser ChEBI
N-acetyl-α-D-galactosaminyl-1-O-serine ChEBI
O-(N-acetyl-α-D-galactosaminyl)-L-serine ChEBI
O-[2-(acetylamino)-2-deoxy-α-D-galactopyranosyl]-L-serine ChEBI
Tn Antigen
Note: (2021-09-10) Tn antigen can refer to the monosaccharide structure N-acetyl-α-D-galactosamine linked to serine or threonine by a glycosidic bond.
 ChEBI
Manual Xrefs Databases
394416 ChemSpider
DB02397 DrugBank
TNR PDBeChem
View more database links
Registry Numbers Types Sources
5115296 Reaxys Registry Number Reaxys
67262-86-6 CAS Registry Number ChEBI
Citations Waiting for Citations Types Sources
15177475 PubMed citation Europe PMC
15864747 PubMed citation Europe PMC
16140451 PubMed citation Europe PMC
16770733 PubMed citation Europe PMC
19233247 PubMed citation Europe PMC
20816162 PubMed citation Europe PMC
6817915 PubMed citation Europe PMC
Last Modified
10 September 2021