TGM6
Protein-glutamine gamma-glutamyltransferase 6
Also known as: dJ734P14.3, SCA35, TGM3L, TGM3L_HUMAN, TGY
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- O95932
- Gene
- TGM6
- Ensembl
- ENSG00000166948
- Chromosome
- 20
- Canonical length
- 706 aa
- Protein class
- Disease related genes, Enzymes, Human disease related genes, Metabolic proteins, Potential drug targets, Predicted intracellular proteins
OverviewNCBI Gene
The protein encoded by this gene belongs to the transglutaminase superfamily. It catalyzes the cross-linking of proteins and the conjugation of polyamines to proteins. Mutations in this gene are associated with spinocerebellar ataxia type 35 (SCA35). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]
Canonical amino-acid sequenceUniProt
706 residues, UniProt reviewed canonical sequence.
>O95932|TGM6
1 MAGIRVTKVD WQRSRNGAAH HTQEYPCPEL VVRRGQSFSL TLELSRALDC EEILIFTMET
61 GPRASEALHT KAVFQTSELE RGEGWTAARE AQMEKTLTVS LASPPSAVIG RYLLSIRLSS
121 HRKHSNRRLG EFVLLFNPWC AEDDVFLASE EERQEYVLSD SGIIFRGVEK HIRAQGWNYG
181 QFEEDILNIC LSILDRSPGH QNNPATDVSC RHNPIYVTRV ISAMVNSNND RGVVQGQWQG
241 KYGGGTSPLH WRGSVAILQK WLKGRYKPVK YGQCWVFAGV LCTVLRCLGI ATRVVSNFNS
301 AHDTDQNLSV DKYVDSFGRT LEDLTEDSMW NFHVWNESWF ARQDLGPSYN GWQVLDATPQ
361 EESEGVFRCG PASVTAIREG DVHLAHDGPF VFAEVNADYI TWLWHEDESR ERVYSNTKKI
421 GRCISTKAVG SDSRVDITDL YKYPEGSRKE RQVYSKAVNR LFGVEASGRR IWIRRAGGRC
481 LWRDDLLEPA TKPSIAGKFK VLEPPMLGHD LRLALCLANL TSRAQRVRVN LSGATILYTR
541 KPVAEILHES HAVRLGPQEE KRIPITISYS KYKEDLTEDK KILLAAMCLV TKGEKLLVEK
601 DITLEDFITI KVLGPAMVGV AVTVEVTVVN PLIERVKDCA LMVEGSGLLQ EQLSIDVPTL
661 EPQERASVQF DITPSKSGPR QLQVDLVSPH FPDIKGFVIV HVATAKLocalizationUniProt · AlphaFold · HPA
Whether an antibody against TGM6 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)
- 0.23
- Highest tissue expression
- 0.4 nTPM
Expression across tissuesHPA
Tissue
- skin: 0.4 nTPM
- tonsil: 0.4 nTPM
- adipose tissue: 0 nTPM
- adrenal gland: 0 nTPM
- amygdala: 0 nTPM
- appendix: 0 nTPM
Single-cell type
- tuft cells: 12 nCPM
- epicardial cells: 2.3 nCPM
- sertoli cells: 2.2 nCPM
- suprabasal keratinocytes: 2.2 nCPM
- endometrial stromal cells: 1.4 nCPM
- esophageal apical cells: 1.4 nCPM
Immune cell
- basophil: 0 nTPM
- classical monocyte: 0 nTPM
- eosinophil: 0 nTPM
- gdT-cell: 0 nTPM
- intermediate monocyte: 0 nTPM
- MAIT T-cell: 0 nTPM
Brain region
- amygdala: 0 nTPM
- basal ganglia: 0 nTPM
- cerebellum: 0 nTPM
- cerebral cortex: 0 nTPM
- choroid plexus: 0 nTPM
- hippocampal formation: 0 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about TGM6.
Disease | AllUniProt
Conditions TGM6 is implicated in, by any mechanism.
- Spinocerebellar ataxia 35 (SCA35) MIM:613908
Disease | GeneticClinVar
10 pathogenic / likely-pathogenic of 554 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Spinocerebellar ataxia type 35
- TGM6-related disorder
Disease | AutoantibodyPubMed
Conditions in which antibodies against TGM6 are reported. Each links to that disease's full target list.
ReferencesPubMed · IEDB
Publications for TGM6 from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
18 publications
- Transglutaminase 6 antibodies in the diagnosis of gluten ataxia.
2013 · Neurology · RCR 4.3 · 112 citations - Neurologic Deficits in Patients With Newly Diagnosed Celiac Disease Are Frequent and Linked With Autoimmunity to Transglutaminase 6.
2019 · Clin Gastroenterol Hepatol · RCR 3.3 · 51 citations - Transglutaminase 6: a protein associated with central nervous system development and motor function.
2013 · Amino Acids · RCR 2.5 · 71 citations - Gluten T cell epitope targeting by TG3 and TG6; implications for dermatitis herpetiformis and gluten ataxia.
2010 · Amino Acids · RCR 1.9 · 63 citations - The neurologic significance of celiac disease biomarkers.
2014 · Neurology · RCR 1.7 · 42 citations
Show 13 more
- Transglutaminase 6 Antibodies in the Serum of Patients With Amyotrophic Lateral Sclerosis.
2015 · JAMA Neurol · RCR 1.2 · 31 citations - Coeliac disease, epilepsy, and cerebral calcifications: association with TG6 autoantibodies.
2013 · Dev Med Child Neurol · RCR 0.8 · 20 citations - Transglutaminase-6 is an autoantigen in progressive multiple sclerosis and is upregulated in reactive astrocytes.
2017 · Mult Scler · RCR 0.8 · 19 citations - TG6 Auto-Antibodies in Dermatitis Herpetiformis.
2020 · Nutrients · RCR 0.8 · 11 citations - Identification of a highly reactive substrate peptide for transglutaminase 6 and its use in detecting transglutaminase activity in the skin epidermis.
2013 · FEBS J · RCR 0.7 · 20 citations - IgA-class autoantibodies against neuronal transglutaminase, TG6 in celiac disease: no evidence for gluten dependency.
2011 · Clin Chim Acta · RCR 0.7 · 21 citations - Epilepsy, cerebral calcifications, and gluten-related disorders: Are anti-transglutaminase 6 antibodies the missing link?
2019 · Seizure · RCR 0.4 · 6 citations - Anti-transglutaminase 6 antibodies in children and young adults with cerebral palsy.
2014 · Autoimmune Dis · RCR 0.4 · 11 citations - [Cerebellar Ataxia and Autoantibodies].
2018 · Brain Nerve · RCR 0.2 · 3 citations - [A case considered gluten ataxia with anti-TG6 IgA antibodies].
2016 · Rinsho Shinkeigaku - CSF Markers of TG6 Autoimmunity in Gluten Ataxia.
2025 · Cerebellum · 2 citations - Serological analysis of gluten-related antibodies in idiopathic neuropathies and cerebellar ataxia.
2025 · J Neurol · 2 citations - A Case of Voltage-Gated Calcium Channel and TG6 Antibody-Positive Cerebellar Ataxia.
2026 · Case Rep Neurol Med
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
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)
- 1.37
- gnomAD pLI
- 0
- gnomAD missense Z
- -0.82
- DepMap mean gene effect
- 0.03
- DepMap dependency class
- none
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 2% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Transglutaminase, N-terminal
- Transglutaminase-like
- Transglutaminase, C-terminal
- Immunoglobulin-like fold
- Transglutaminase, active site
- Immunoglobulin E-set
- Protein-glutamine gamma-glutamyltransferase, animal
- Transglutaminase, C-terminal domain superfamily
- Transglutaminase-like superfamily
- Papain-like cysteine peptidase superfamily
- Protein-glutamine gamma-glutamyltransferases
- Transglutaminase family
- Transglutaminase family, C-terminal ig like domain
- Transglutaminase-like superfamily
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads TGM6 as an antibody target. Whether an autoantibody or antibody against TGM6 could matter depends on whether native TGM6 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
TGM6 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 TGM6 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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