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 QSAHLKCLocalizationUniProt · 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
- axon guidance
- cellular response to leukemia inhibitory factor
- keratan sulfate proteoglycan biosynthetic process
- poly-N-acetyllactosamine biosynthetic process
- protein O-linked glycosylation
- sensory perception of smell
Molecular functions
- 3-N-acetylglucosaminyltransferase activity
- N-acetyllactosaminide beta-1
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.
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