Seroatlas · Human Serome Atlas

TGM3

Protein-glutamine gamma-glutamyltransferase E

Also known as: TGE, TGM3_HUMAN

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

Protein identityUniProt · HPA

UniProt accession
Q08188
Gene
TGM3
Ensembl
ENSG00000125780
Chromosome
20
Canonical length
693 aa
Protein class
Disease related genes, Enzymes, Human disease related genes, Metabolic proteins, Plasma proteins, Potential drug targets, Predicted intracellular proteins

OverviewNCBI Gene

Transglutaminases are enzymes that catalyze the crosslinking of proteins by epsilon-gamma glutamyl lysine isopeptide bonds. While the primary structure of transglutaminases is not conserved, they all have the same amino acid sequence at their active sites and their activity is calcium-dependent. The protein encoded by this gene consists of two polypeptide chains activated from a single precursor protein by proteolysis. The encoded protein is involved the later stages of cell envelope formation in the epidermis and hair follicle. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

693 residues, UniProt reviewed canonical sequence.

>Q08188|TGM3
     1  MAALGVQSIN WQTAFNRQAH HTDKFSSQEL ILRRGQNFQV LMIMNKGLGS NERLEFIVST
    61  GPYPSESAMT KAVFPLSNGS SGGWSAVLQA SNGNTLTISI SSPASAPIGR YTMALQIFSQ
   121  GGISSVKLGT FILLFNPWLN VDSVFMGNHA EREEYVQEDA GIIFVGSTNR IGMIGWNFGQ
   181  FEEDILSICL SILDRSLNFR RDAATDVASR NDPKYVGRVL SAMINSNDDN GVLAGNWSGT
   241  YTGGRDPRSW NGSVEILKNW KKSGFSPVRY GQCWVFAGTL NTALRSLGIP SRVITNFNSA
   301  HDTDRNLSVD VYYDPMGNPL DKGSDSVWNF HVWNEGWFVR SDLGPSYGGW QVLDATPQER
   361  SQGVFQCGPA SVIGVREGDV QLNFDMPFIF AEVNADRITW LYDNTTGKQW KNSVNSHTIG
   421  RYISTKAVGS NARMDVTDKY KYPEGSDQER QVFQKALGKL KPNTPFAATS SMGLETEEQE
   481  PSIIGKLKVA GMLAVGKEVN LVLLLKNLSR DTKTVTVNMT AWTIIYNGTL VHEVWKDSAT
   541  MSLDPEEEAE HPIKISYAQY EKYLKSDNMI RITAVCKVPD ESEVVVERDI ILDNPTLTLE
   601  VLNEARVRKP VNVQMLFSNP LDEPVRDCVL MVEGSGLLLG NLKIDVPTLG PKEGSRVRFD
   661  ILPSRSGTKQ LLADFSCNKF PAIKAMLSID VAE

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against TGM3 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
Intracellular
Secreted
No
Transmembrane segments
0
Mean surface accessibility (rSASA)
0.22
Highest tissue expression
1,778 nTPM

Expression across tissuesHPA

Tissue

  • esophagus: 1,778 nTPM
  • salivary gland: 199 nTPM
  • tonsil: 134 nTPM
  • skin: 79 nTPM
  • cervix: 38 nTPM
  • vagina: 28 nTPM

Single-cell type

  • esophageal apical cells: 848 nCPM
  • suprabasal keratinocytes: 45 nCPM
  • esophageal suprabasal cells: 39 nCPM
  • ependymal cells: 18 nCPM
  • neuroendocrine cells: 16 nCPM
  • epididymal efferent duct ciliated cells: 3.8 nCPM

Immune cell

  • neutrophil: 30 nTPM
  • eosinophil: 0.1 nTPM
  • basophil: 0 nTPM
  • classical monocyte: 0 nTPM
  • gdT-cell: 0 nTPM
  • intermediate monocyte: 0 nTPM

Brain region

  • midbrain: 0.6 nTPM
  • cerebral cortex: 0.5 nTPM
  • amygdala: 0.3 nTPM
  • medulla oblongata: 0.2 nTPM
  • spinal cord: 0.2 nTPM
  • hippocampal formation: 0.1 nTPM

DiseaseUniProt · ClinVar · IEDB · PubMed

Four sources answering four different questions about TGM3.

Disease | AllUniProt

Conditions TGM3 is implicated in, by any mechanism.

Disease | GeneticClinVar

1 pathogenic / likely-pathogenic of 173 ClinVar records.

Conditions with pathogenic or likely-pathogenic variants.

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)
0.69
gnomAD pLI
0
gnomAD missense Z
-0.41
DepMap mean gene effect
0.06
DepMap dependency class
none

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% 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 TGM3 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 TGM3 as an antibody target. Whether an autoantibody or antibody against TGM3 could matter depends on whether native TGM3 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

TGM3 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 TGM3 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/TGM3. 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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