Seroatlas · Human Serome Atlas

B3GNT2

N-acetyllactosaminide beta-1,3-N-acetylglucosaminyltransferase 2

Also known as: B3GN-T1, B3GN-T2, B3GN2_HUMAN, B3GNT-2, B3GNT1, BETA3GNT

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
Q9NY97
Gene
B3GNT2
Ensembl
ENSG00000170340
Chromosome
2
Canonical length
397 aa
Protein class
Enzymes, Metabolic proteins, Plasma proteins, Predicted membrane proteins
Subcellular location
Vesicles

OverviewNCBI Gene

This gene encodes a member of the beta-1,3-N-acetylglucosaminyltransferase family. This enzyme is a type II transmembrane protein. It prefers the substrate of lacto-N-neotetraose, and is involved in the biosynthesis of poly-N-acetyllactosamine chains. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jan 2016]

Canonical amino-acid sequenceUniProt

397 residues, UniProt reviewed canonical sequence.

>Q9NY97|B3GNT2
     1  MSVGRRRIKL LGILMMANVF IYFIMEVSKS SSQEKNGKGE VIIPKEKFWK ISTPPEAYWN
    61  REQEKLNRQY NPILSMLTNQ TGEAGRLSNI SHLNYCEPDL RVTSVVTGFN NLPDRFKDFL
   121  LYLRCRNYSL LIDQPDKCAK KPFLLLAIKS LTPHFARRQA IRESWGQESN AGNQTVVRVF
   181  LLGQTPPEDN HPDLSDMLKF ESEKHQDILM WNYRDTFFNL SLKEVLFLRW VSTSCPDTEF
   241  VFKGDDDVFV NTHHILNYLN SLSKTKAKDL FIGDVIHNAG PHRDKKLKYY IPEVVYSGLY
   301  PPYAGGGGFL YSGHLALRLY HITDQVHLYP IDDVYTGMCL QKLGLVPEKH KGFRTFDIEE
   361  KNKNNICSYV DLMLVHSRKP QEMIDIWSQL QSAHLKC

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against B3GNT2 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.

Antibody reachability
Other membrane
Secreted
No
Transmembrane segments
1
Mean surface accessibility (rSASA)
0.29
Highest tissue expression
69 nTPM

Expression across tissuesHPA

Tissue

  • bone marrow: 69 nTPM
  • pancreas: 37 nTPM
  • lung: 32 nTPM
  • kidney: 31 nTPM
  • placenta: 29 nTPM
  • duodenum: 26 nTPM

Single-cell type

  • respiratory ionocytes: 175 nCPM
  • salivary ionocytes: 158 nCPM
  • esophageal apical cells: 155 nCPM
  • endometrial luminal cells: 154 nCPM
  • megakaryocyte progenitors: 117 nCPM
  • neutrophils: 103 nCPM

Immune cell

  • eosinophil: 56 nTPM
  • NK-cell: 41 nTPM
  • memory CD8 T-cell: 35 nTPM
  • MAIT T-cell: 28 nTPM
  • T-reg: 26 nTPM
  • naive CD8 T-cell: 26 nTPM

Brain region

  • basal ganglia: 25 nTPM
  • pons: 18 nTPM
  • choroid plexus: 16 nTPM
  • thalamus: 16 nTPM
  • hypothalamus: 15 nTPM
  • midbrain: 15 nTPM

Genetic constraint and essentialitygnomAD · DepMap

Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.

gnomAD LOEUF (loss-of-function intolerance)
0.41
gnomAD pLI
0.89
gnomAD missense Z
1.28
DepMap mean gene effect
-0.04
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 6% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

InteractionsUniProt · HPA

Protein binding partners of B3GNT2 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads B3GNT2 as an antibody target. Whether an autoantibody or antibody against B3GNT2 could matter depends on whether native B3GNT2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

B3GNT2 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.

Annotation status

The present source text does not explicitly label B3GNT2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/B3GNT2. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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