Stats by Source
Total, split by cell line (COSMIC CL / DepMap / PubMed) vs tissue (COSMIC primary tissue)
Total = all mutations for this gene across every source.
Cell line = COSMIC Cell Lines Project + DepMap + PubMed.
Tissue = COSMIC primary-tissue (patient tumour) samples.
Total can exceed cell line + tissue: COSMIC tissue-derived models sit only in global, and a peptide can be shared across both.
| Total | Cell line | Tissue | |
|---|---|---|---|
| Mutations | 328 | 51 | 277 |
| Samples | 167 | 35 | 132 |
| Peptides | 139 | 27 | 116 |
Function
HNMT · Histamine N-methyltransferase
In mammals, histamine is metabolized by two major pathways: N(tau)-methylation via histamine N-methyltransferase and oxidative deamination via diamine oxidase. This gene encodes the first enzyme which is found in the cytosol and uses S-adenosyl-L-methionine as the methyl donor. In the mammalian brain, the neurotransmitter activity of histamine is controlled by N(tau)-methylation as diamine oxidase is not found in the central nervous system. A common genetic polymorphism affects the activity levels of this gene product in red blood cells. Multiple alternatively spliced transcript variants that encode different proteins have been found for this gene. [provided by RefSeq, Jul 2008].
Isoforms & Proteins
4 transcripts · UniProt mapping is sequence-verified (AA-safe)
Each Ensembl transcript (ENST) this gene is mutated on, with its matched UniProt accession.
The mapping is sequence-verified: the UniProt sequence is identical to the transcript translation, so amino-acid positions line up exactly. A * marks an unreviewed (TrEMBL) entry.
Counts are mutations and unique mutant peptides on each transcript.
Gene Properties
Recurrent Mutations
All 113 amino-acid changes on canonical ENST00000280097 · needle height = samples · drag the mini-map to zoom
A lollipop / needle plot – the standard way to show recurrent mutations along a protein (as used by cBioPortal and MutationMapper).
X-axis = amino-acid position in the protein.
Needle height & head size = how often that exact amino-acid change was observed (its recurrence). Tall/large heads are mutational hotspots.
The most recurrent changes are labelled; hover any needle for the change, position and counts.
Mutation frequency across cancer types
% of samples with a missense/complex mutation in HNMT · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in HNMT – counted as distinct samples (a sample counts once no matter how many mutations it has).
Split into cell line and tissue; each cell shows mutated / total and the percentage. Cohorts with <20 samples are omitted. Ordered by combined frequency.
| Cancer type | Cell lines | Tissue samples |
|---|---|---|
| T-Cell Non-Hodgkins Lymphoma | 1/26 4% | 0/0 0% |
| Unknown | 0/10 0% | 1/29 3% |
| Acute Myeloid Leukemia | 2/90 2% | 0/0 0% |
| Retinoblastoma | 0/27 0% | 1/30 3% |
| Endometrial Carcinoma | 3/42 7% | 8/612 1% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 12/810 1% |
| Plasma Cell Myeloma | 2/44 5% | 1/305 0% |
| Melanoma | 2/210 1% | 15/1899 1% |
| Other Solid Cancers | 2/94 2% | 10/1515 1% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 1/133 1% |
| Gastric Carcinoma | 0/74 0% | 11/1809 1% |
| Neuroendocrine Tumour | 2/154 1% | 2/577 0% |
| Rhabdomyosarcoma | 0/33 0% | 1/171 1% |
| Colorectal Carcinoma | 2/143 1% | 14/3239 0% |
| Osteosarcoma | 1/45 2% | 0/166 0% |
| Medulloblastoma | 0/0 0% | 2/450 0% |
| Biliary Tract Carcinoma | 1/54 2% | 3/950 0% |
| Bladder Carcinoma | 0/58 0% | 4/956 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 3/752 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 8/2550 0% |
| Non-Small Cell Lung Carcinoma | 3/304 1% | 2/1390 0% |
| Head and Neck Carcinoma | 1/85 1% | 4/1574 0% |
| Ovarian Carcinoma | 1/109 1% | 2/998 0% |
| Other Sarcomas | 1/69 1% | 1/699 0% |
| Other Blood Cancers | 2/61 3% | 4/2725 0% |
| Hepatocellular Carcinoma | 2/46 4% | 3/2210 0% |
| Cervical Carcinoma | 0/35 0% | 1/422 0% |
| Pancreatic Carcinoma | 3/89 3% | 0/1611 0% |
| Kidney Carcinoma | 0/85 0% | 3/1862 0% |
| Breast Carcinoma | 1/144 1% | 4/3264 0% |
Mutation Distribution
Where HNMT is mutated · all tissues, split by cell line vs tissue
How many mutations in HNMT were found in each tissue, across the whole database.
Each bar is a tissue (cell-line and tissue names are merged to the standard tissue), split into cell line and tissue (patient tumour) contributions.
This shows the cancer-context where this gene is recurrently altered.
GTEx Expression
Median TPM across 54 healthy tissues
Median gene expression (TPM) in normal, non-cancer human tissues from the GTEx project.
Useful for judging tumour specificity – a strong neoantigen target ideally comes from a gene with low expression in healthy tissues.
Scroll or drag the mini-axis below the chart to browse all tissues.
Mutations
All 328 mutations in HNMT
Every mutation record for this gene, across all samples and sources.
The Sample column links to the cell line (cell-line samples) or the tissue type (tissue samples).
Use the Type / Source filters, the search box, and column sorting to explore; each CAN-IMMUNE ID opens the full mutation & peptide view.
| ID | Sample | Transcript | AA Change | CDS | Type | Source | Mutant Peptide | Wild-type Peptide |
|---|