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 | 517 | 57 | 456 |
| Samples | 275 | 38 | 234 |
| Peptides | 202 | 28 | 179 |
Function
CHRNA3 · Cholinergic receptor nicotinic alpha 3 subunit
This locus encodes a member of the nicotinic acetylcholine receptor family of proteins. Members of this family of proteins form pentameric complexes comprised of both alpha and beta subunits. This locus encodes an alpha-type subunit, as it contains characteristic adjacent cysteine residues. The encoded protein is a ligand-gated ion channel that likely plays a role in neurotransmission. Polymorphisms in this gene have been associated with an increased risk of smoking initiation and an increased susceptibility to lung cancer. Alternatively spliced transcript variants have been described. [provided by RefSeq, Nov 2009].
Isoforms & Proteins
3 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 190 amino-acid changes on canonical ENST00000326828 · 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 CHRNA3 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in CHRNA3 – 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 |
|---|---|---|
| Oral Cavity Carcinoma | 2/54 4% | 0/0 0% |
| Endometrial Carcinoma | 2/42 5% | 17/612 3% |
| Melanoma | 6/210 3% | 39/1899 2% |
| Acute Myeloid Leukemia | 1/90 1% | 0/0 0% |
| Neuroendocrine Tumour | 3/154 2% | 5/577 1% |
| Colorectal Carcinoma | 8/143 6% | 27/3239 1% |
| Glioblastoma | 1/98 1% | 0/0 0% |
| Thyroid Gland Carcinoma | 3/45 7% | 11/1592 1% |
| Ovarian Carcinoma | 3/109 3% | 6/998 1% |
| Squamous Cell Lung Carcinoma | 1/57 2% | 6/810 1% |
| Gastric Carcinoma | 0/74 0% | 15/1809 1% |
| Meningioma | 0/3 0% | 2/252 1% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 20/2550 1% |
| Other Solid Cancers | 1/94 1% | 10/1515 1% |
| Cervical Carcinoma | 0/35 0% | 3/422 1% |
| Non-Small Cell Lung Carcinoma | 0/304 0% | 11/1390 1% |
| Rhabdomyosarcoma | 0/33 0% | 1/171 1% |
| Head and Neck Carcinoma | 2/85 2% | 6/1574 0% |
| Non-Cancerous | 1/104 1% | 3/830 0% |
| Biliary Tract Carcinoma | 0/54 0% | 4/950 0% |
| Bladder Carcinoma | 0/58 0% | 4/956 0% |
| Esophageal Carcinoma | 0/23 0% | 3/769 0% |
| Hepatocellular Carcinoma | 0/46 0% | 8/2210 0% |
| Glioma | 0/52 0% | 7/2127 0% |
| Breast Carcinoma | 2/144 1% | 9/3264 0% |
| Other Sarcomas | 1/69 1% | 1/699 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 2/752 0% |
| Other Blood Cancers | 1/61 2% | 5/2725 0% |
| B-Cell Non-Hodgkins Lymphoma | 0/88 0% | 5/2534 0% |
| Kidney Carcinoma | 0/85 0% | 3/1862 0% |
Mutation Distribution
Where CHRNA3 is mutated · all tissues, split by cell line vs tissue
How many mutations in CHRNA3 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 517 mutations in CHRNA3
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 |
|---|