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 | 554 | 81 | 472 |
| Samples | 155 | 33 | 121 |
| Peptides | 125 | 24 | 104 |
Function
KCNMB3 · Potassium calcium-activated channel subfamily M regulatory beta subunit 3
MaxiK channels are large conductance, voltage and calcium-sensitive potassium channels which are fundamental to the control of smooth muscle tone and neuronal excitability. MaxiK channels can be formed by 2 subunits: the pore-forming alpha subunit and the modulatory beta subunit. The protein encoded by this gene is an auxiliary beta subunit which may partially inactivate or slightly decrease the activation time of MaxiK alpha subunit currents. Alternative splicing results in multiple transcript variants. A related pseudogene has been identified on chromosome 22. [provided by RefSeq, Jul 2009].
Isoforms & Proteins
5 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 88 amino-acid changes on canonical ENST00000349697 · 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 KCNMB3 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in KCNMB3 – 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 |
|---|---|---|
| Chronic Myelogenous Leukemia | 1/25 4% | 0/0 0% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 5/133 4% |
| Glioblastoma | 3/98 3% | 0/0 0% |
| Oral Cavity Carcinoma | 1/54 2% | 0/0 0% |
| Endometrial Carcinoma | 1/42 2% | 11/612 2% |
| Melanoma | 3/210 1% | 18/1899 1% |
| Burkitts Lymphoma | 2/32 6% | 0/196 0% |
| Non-Small Cell Lung Carcinoma | 7/304 2% | 5/1390 0% |
| Bladder Carcinoma | 0/58 0% | 6/956 1% |
| Gastric Carcinoma | 0/74 0% | 10/1809 1% |
| Colorectal Carcinoma | 5/143 4% | 11/3239 0% |
| Hepatocellular Carcinoma | 0/46 0% | 10/2210 0% |
| Cervical Carcinoma | 0/35 0% | 2/422 0% |
| Non-Cancerous | 0/104 0% | 4/830 0% |
| Head and Neck Carcinoma | 0/85 0% | 7/1574 0% |
| Ovarian Carcinoma | 1/109 1% | 3/998 0% |
| Squamous Cell Lung Carcinoma | 1/57 2% | 2/810 0% |
| Other Solid Cancers | 1/94 1% | 4/1515 0% |
| Plasma Cell Myeloma | 1/44 2% | 0/305 0% |
| Other Sarcomas | 0/69 0% | 2/699 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 6/2550 0% |
| Breast Carcinoma | 4/144 3% | 3/3264 0% |
| Biliary Tract Carcinoma | 0/54 0% | 2/950 0% |
| B-Cell Non-Hodgkins Lymphoma | 0/88 0% | 5/2534 0% |
| Thyroid Gland Carcinoma | 0/45 0% | 2/1592 0% |
| Other Blood Cancers | 0/61 0% | 2/2725 0% |
| Pancreatic Carcinoma | 1/89 1% | 0/1611 0% |
| Glioma | 0/52 0% | 1/2127 0% |
| Prostate Carcinoma | 0/13 0% | 1/2105 0% |
| B-Lymphoblastic Leukemia | 1/55 2% | 0/2640 0% |
Mutation Distribution
Where KCNMB3 is mutated · all tissues, split by cell line vs tissue
How many mutations in KCNMB3 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 554 mutations in KCNMB3
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 |
|---|