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 | 375 | 75 | 295 |
| Samples | 350 | 66 | 280 |
| Peptides | 246 | 41 | 216 |
Function
KCNJ4 · Potassium inwardly rectifying channel subfamily J member 4
Several different potassium channels are known to be involved with electrical signaling in the nervous system. One class is activated by depolarization whereas a second class is not. The latter are referred to as inwardly rectifying K+ channels, and they have a greater tendency to allow potassium to flow into the cell rather than out of it. This asymmetry in potassium ion conductance plays a key role in the excitability of muscle cells and neurons. The protein encoded by this gene is an integral membrane protein and member of the inward rectifier potassium channel family. The encoded protein has a small unitary conductance compared to other members of this protein family. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008].
Isoforms & Proteins
1 transcript · 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 |
|---|---|---|---|
| ENST00000303592 | P48050 | 375 | 246 |
Gene Properties
Recurrent Mutations
All 246 amino-acid changes on canonical ENST00000303592 · 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 KCNJ4 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in KCNJ4 – 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 | 2/42 5% | 21/612 3% |
| Melanoma | 9/210 4% | 33/1899 2% |
| Colorectal Carcinoma | 10/143 7% | 51/3239 2% |
| Non-Small Cell Lung Carcinoma | 10/304 3% | 17/1390 1% |
| Squamous Cell Lung Carcinoma | 2/57 4% | 11/810 1% |
| Gastric Carcinoma | 4/74 5% | 23/1809 1% |
| Osteosarcoma | 2/45 4% | 1/166 1% |
| Pheochromocytoma and Paraganglioma | 0/0 0% | 1/71 1% |
| Ewings Sarcoma | 4/63 6% | 0/262 0% |
| Ovarian Carcinoma | 3/109 3% | 10/998 1% |
| Chondrosarcoma | 1/14 7% | 0/75 0% |
| Other Solid Cancers | 0/94 0% | 18/1515 1% |
| Acute Myeloid Leukemia | 1/90 1% | 0/0 0% |
| Cervical Carcinoma | 0/35 0% | 5/422 1% |
| Glioblastoma | 1/98 1% | 0/0 0% |
| Burkitts Lymphoma | 2/32 6% | 0/196 0% |
| Hodgkins Lymphoma | 0/16 0% | 1/122 1% |
| Other Sarcomas | 2/69 3% | 3/699 0% |
| Head and Neck Carcinoma | 1/85 1% | 9/1574 1% |
| Neuroendocrine Tumour | 2/154 1% | 2/577 0% |
| Non-Cancerous | 0/104 0% | 5/830 1% |
| Small Cell Lung Carcinoma | 0/9 0% | 4/752 1% |
| Germ Cell Tumour | 0/25 0% | 1/169 1% |
| Glioma | 0/52 0% | 11/2127 1% |
| Bladder Carcinoma | 1/58 2% | 4/956 0% |
| Pancreatic Carcinoma | 2/89 2% | 6/1611 0% |
| Hepatocellular Carcinoma | 0/46 0% | 9/2210 0% |
| Meningioma | 0/3 0% | 1/252 0% |
| Esophageal Carcinoma | 0/23 0% | 3/769 0% |
Mutation Distribution
Where KCNJ4 is mutated · all tissues, split by cell line vs tissue
How many mutations in KCNJ4 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 53 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 375 mutations in KCNJ4
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 |
|---|