GNMT
Glycine N-methyltransferase
Also known as: GNMT_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q14749
- Gene
- GNMT
- Ensembl
- ENSG00000124713
- Chromosome
- 6
- Canonical length
- 295 aa
- Protein class
- Disease related genes, Enzymes, Human disease related genes, Metabolic proteins, Potential drug targets, Predicted intracellular proteins
- Subcellular location
- Cytosol
- Quaternary structure
- Homotetramer
OverviewNCBI Gene
This locus represents naturally occurring readthrough transcription between the upstream CNPY3 (canopy FGF signaling regulator 3) and the downstream GNMT (glycine N-methyltransferase) genes. Readthrough transcripts may encode proteins that have amino acid similarity with proteins encoded by both individual genes. [provided by RefSeq, Jan 2016]
Canonical amino-acid sequenceUniProt
295 residues, UniProt reviewed canonical sequence.
>Q14749|GNMT
1 MVDSVYRTRS LGVAAEGLPD QYADGEAARV WQLYIGDTRS RTAEYKAWLL GLLRQHGCQR
61 VLDVACGTGV DSIMLVEEGF SVTSVDASDK MLKYALKERW NRRHEPAFDK WVIEEANWMT
121 LDKDVPQSAE GGFDAVICLG NSFAHLPDCK GDQSEHRLAL KNIASMVRAG GLLVIDHRNY
181 DHILSTGCAP PGKNIYYKSD LTKDVTTSVL IVNNKAHMVT LDYTVQVPGA GQDGSPGLSK
241 FRLSYYPHCL ASFTELLQAA FGGKCQHSVL GDFKPYKPGQ TYIPCYFIHV LKRTDLocalizationUniProt · AlphaFold · HPA
Whether an antibody against GNMT 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)
- 0.26
- Highest tissue expression
- 564 nTPM
Expression across tissuesHPA
Tissue
- pancreas: 564 nTPM
- liver: 279 nTPM
- stomach: 49 nTPM
- prostate: 20 nTPM
- salivary gland: 9.2 nTPM
- pituitary gland: 8.6 nTPM
Single-cell type
- hepatocytes: 1,066 nCPM
- pancreatic acinar cells: 170 nCPM
- prostatic glandular cells: 39 nCPM
- breast hormone-responsive cells: 29 nCPM
- gastric chief cells: 27 nCPM
- cholangiocytes: 18 nCPM
Immune cell
- plasmacytoid DC: 0.7 nTPM
- neutrophil: 0.5 nTPM
- intermediate monocyte: 0.2 nTPM
- myeloid DC: 0.2 nTPM
- naive CD8 T-cell: 0.2 nTPM
- classical monocyte: 0.1 nTPM
Brain region
- cerebellum: 8.6 nTPM
- cerebral cortex: 7.9 nTPM
- basal ganglia: 7.8 nTPM
- hypothalamus: 7.7 nTPM
- amygdala: 7.1 nTPM
- hippocampal formation: 7.1 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about GNMT.
Disease | AllUniProt
Conditions GNMT is implicated in, by any mechanism.
- Glycine N-methyltransferase deficiency (GNMT deficiency) MIM:606664
Disease | GeneticClinVar
2 pathogenic / likely-pathogenic of 138 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Glycine N-methyltransferase deficiency
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)
- 0.95
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.35
- DepMap mean gene effect
- -0.09
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- glycogen metabolic process
- methionine metabolic process
- methylation
- one-carbon metabolic process
- protein homotetramerization
- regulation of gluconeogenesis
- S-adenosylhomocysteine metabolic process
- S-adenosylmethionine metabolic process
- sarcosine metabolic process
Molecular functions
- folic acid binding
- glycine binding
- identical protein binding
- S-adenosyl-L-methionine binding
- glycine N-methyltransferase activity
Cellular components
Protein domainsUniProt · Pfam · InterPro
- S-adenosyl-L-methionine-dependent methyltransferase superfamily
- Methyltransferase domain 25
- Methyltransferase domain
- Glycine/Sarcosine N-methyltransferase
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of GNMT 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 GNMT as an antibody target. Whether an autoantibody or antibody against GNMT could matter depends on whether native GNMT is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
GNMT 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 GNMT as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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