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 | 5,325 | 527 | 4,699 |
| Samples | 730 | 141 | 576 |
| Peptides | 600 | 115 | 507 |
Function
KCNQ2 · Potassium voltage-gated channel subfamily Q member 2
The M channel is a slowly activating and deactivating potassium channel that plays a critical role in the regulation of neuronal excitability. The M channel is formed by the association of the protein encoded by this gene and a related protein encoded by the KCNQ3 gene, both integral membrane proteins. M channel currents are inhibited by M1 muscarinic acetylcholine receptors and activated by retigabine, a novel anti-convulsant drug. Defects in this gene are a cause of benign familial neonatal convulsions type 1 (BFNC), also known as epilepsy, benign neonatal type 1 (EBN1). At least five transcript variants encoding five different isoforms have been found for this gene. [provided by RefSeq, Jul 2008].
Isoforms & Proteins
10 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.
| Transcript | UniProt | Mutations | Peptides |
|---|---|---|---|
| ENST00000359125 | O43526 | 764 | 490 |
| ENST00000626839 | O43526-2 | 639 | 431 |
| ENST00000360480 | O43526-3 | 632 | 428 |
| ENST00000344462 | O43526-4 | 631 | 424 |
| ENST00000637193 | A0A1B0GW14* | 551 | 373 |
| ENST00000370224 | Q4VXP6* | 505 | 351 |
| ENST00000629241 | A0A0D9SG49* | 501 | 347 |
| ENST00000625514 | A0A0D9SEV1* | 497 | 344 |
| ENST00000629676 | A0A0D9SF10* | 369 | 254 |
| ENST00000344425 | O43526-6 | 236 | 159 |
Gene Properties
Recurrent Mutations
All 490 amino-acid changes on canonical ENST00000359125 · 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 KCNQ2 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in KCNQ2 – 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 | 7/40 18% | 0/0 0% |
| Chronic Myelogenous Leukemia | 2/25 8% | 0/0 0% |
| Oral Cavity Carcinoma | 3/54 6% | 0/0 0% |
| Endometrial Carcinoma | 9/42 21% | 26/612 4% |
| Melanoma | 14/210 7% | 69/1899 4% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 5/133 4% |
| Non-Small Cell Lung Carcinoma | 17/304 6% | 44/1390 3% |
| Other Solid Cancers | 3/94 3% | 48/1515 3% |
| Glioblastoma | 3/98 3% | 0/0 0% |
| Gastric Carcinoma | 4/74 5% | 53/1809 3% |
| Colorectal Carcinoma | 22/143 15% | 80/3239 2% |
| Squamous Cell Lung Carcinoma | 3/57 5% | 19/810 2% |
| Small Cell Lung Carcinoma | 2/9 22% | 16/752 2% |
| Acute Myeloid Leukemia | 2/90 2% | 0/0 0% |
| Adrenocortical Carcinoma | 0/3 0% | 2/112 2% |
| Cervical Carcinoma | 1/35 3% | 6/422 1% |
| Ovarian Carcinoma | 6/109 6% | 10/998 1% |
| Esophageal Squamous Cell Carcinoma | 1/51 2% | 36/2550 1% |
| Thyroid Gland Carcinoma | 2/45 4% | 20/1592 1% |
| Biliary Tract Carcinoma | 2/54 4% | 11/950 1% |
| Bladder Carcinoma | 4/58 7% | 7/956 1% |
| Germ Cell Tumour | 0/25 0% | 2/169 1% |
| Head and Neck Carcinoma | 1/85 1% | 16/1574 1% |
| Neuroendocrine Tumour | 5/154 3% | 2/577 0% |
| Pancreatic Carcinoma | 3/89 3% | 13/1611 1% |
| Esophageal Carcinoma | 0/23 0% | 7/769 1% |
| Plasma Cell Myeloma | 1/44 2% | 2/305 1% |
| Non-Cancerous | 0/104 0% | 7/830 1% |
| Glioma | 2/52 4% | 14/2127 1% |
| Breast Carcinoma | 5/144 3% | 20/3264 1% |
Mutation Distribution
Where KCNQ2 is mutated · all tissues, split by cell line vs tissue
How many mutations in KCNQ2 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 5,325 mutations in KCNQ2
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 |
|---|