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 | 441 | 76 | 363 |
| Samples | 349 | 66 | 281 |
| Peptides | 276 | 46 | 240 |
Function
CHRNB4 · Cholinergic receptor nicotinic beta 4 subunit
This gene is found within a conserved gene cluster and encodes one of the beta subunits of the nicotinic acetylcholine receptor (nAChRs) superfamily which form ligand-gated ion channels with a central pore that forms a cation channel. Neuronal nAChRs are pentameric structures that can be either homomeric or heteromeric, with heteromeric structures containing both alpha and beta subunits. Each subunit contains an extracellular amino terminus and four transmembrane domains. Nicotine is one of the agonists that binds to the receptor. Variants in this gene have been associated with nicotine dependence and lung cancer. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Sep 2017].
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 217 amino-acid changes on canonical ENST00000261751 · 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 CHRNB4 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in CHRNB4 – 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-Lymphoblastic Leukemia | 4/40 10% | 0/0 0% |
| Endometrial Carcinoma | 4/42 10% | 23/612 4% |
| Meningioma | 0/3 0% | 7/252 3% |
| Thymic Epithelial Tumor | 0/0 0% | 1/39 3% |
| Acute Myeloid Leukemia | 2/90 2% | 0/0 0% |
| Melanoma | 5/210 2% | 40/1899 2% |
| Non-Small Cell Lung Carcinoma | 12/304 4% | 23/1390 2% |
| Oral Cavity Carcinoma | 1/54 2% | 0/0 0% |
| Germ Cell Tumour | 2/25 8% | 1/169 1% |
| Gastric Carcinoma | 0/74 0% | 25/1809 1% |
| Plasma Cell Myeloma | 2/44 5% | 2/305 1% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 10/810 1% |
| Colorectal Carcinoma | 7/143 5% | 28/3239 1% |
| Bladder Carcinoma | 3/58 5% | 7/956 1% |
| Other Solid Cancers | 1/94 1% | 14/1515 1% |
| Small Cell Lung Carcinoma | 0/9 0% | 7/752 1% |
| Neuroendocrine Tumour | 4/154 3% | 2/577 0% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 1/133 1% |
| Biliary Tract Carcinoma | 0/54 0% | 7/950 1% |
| Pancreatic Carcinoma | 2/89 2% | 8/1611 0% |
| Glioma | 2/52 4% | 10/2127 0% |
| Esophageal Carcinoma | 1/23 4% | 3/769 0% |
| Head and Neck Carcinoma | 2/85 2% | 6/1574 0% |
| Breast Carcinoma | 2/144 1% | 13/3264 0% |
| Cervical Carcinoma | 1/35 3% | 1/422 0% |
| Burkitts Lymphoma | 1/32 3% | 0/196 0% |
| Hepatocellular Carcinoma | 1/46 2% | 9/2210 0% |
| Non-Cancerous | 0/104 0% | 4/830 0% |
| Other Sarcomas | 1/69 1% | 2/699 0% |
| Thyroid Gland Carcinoma | 2/45 4% | 4/1592 0% |
Mutation Distribution
Where CHRNB4 is mutated · all tissues, split by cell line vs tissue
How many mutations in CHRNB4 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 47 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 441 mutations in CHRNB4
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 |
|---|