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 | 324 | 61 | 259 |
| Samples | 143 | 34 | 107 |
| Peptides | 132 | 21 | 112 |
Function
IMPA1 · Inositol monophosphatase 1
This gene encodes an enzyme that dephosphorylates myo-inositol monophosphate to generate free myo-inositol, a precursor of phosphatidylinositol, and is therefore an important modulator of intracellular signal transduction via the production of the second messengers myoinositol 1,4,5-trisphosphate and diacylglycerol. This enzyme can also use myo-inositol-1,3-diphosphate, myo-inositol-1,4-diphosphate, scyllo-inositol-phosphate, glucose-1-phosphate, glucose-6-phosphate, fructose-1-phosphate, beta-glycerophosphate, and 2'-AMP as substrates. This enzyme shows magnesium-dependent phosphatase activity and is inhibited by therapeutic concentrations of lithium. Inhibition of inositol monophosphate hydroylosis and subsequent depletion of inositol for phosphatidylinositol synthesis may explain the anti-manic and anti-depressive effects of lithium administered to treat bipolar disorder. Alternative splicing results in multiple transcript variants encoding distinct isoforms. A pseudogene of this gene is also present on chromosome 8q21.13. [provided by RefSeq, Dec 2014].
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 96 amino-acid changes on canonical ENST00000256108 · 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 IMPA1 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in IMPA1 – 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 | 1/40 2% | 0/0 0% |
| Endometrial Carcinoma | 1/42 2% | 8/612 1% |
| Plasma Cell Myeloma | 3/44 7% | 1/305 0% |
| Squamous Cell Lung Carcinoma | 4/57 7% | 4/810 0% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 1/133 1% |
| Colorectal Carcinoma | 8/143 6% | 16/3239 0% |
| Gastric Carcinoma | 1/74 1% | 9/1809 0% |
| Melanoma | 2/210 1% | 9/1899 0% |
| Other Solid Cancers | 0/94 0% | 8/1515 1% |
| Non-Small Cell Lung Carcinoma | 4/304 1% | 4/1390 0% |
| Cervical Carcinoma | 0/35 0% | 2/422 0% |
| Neuroendocrine Tumour | 3/154 2% | 0/577 0% |
| Hepatocellular Carcinoma | 0/46 0% | 9/2210 0% |
| Small Cell Lung Carcinoma | 1/9 11% | 2/752 0% |
| Head and Neck Carcinoma | 1/85 1% | 5/1574 0% |
| Ewings Sarcoma | 1/63 2% | 0/262 0% |
| Biliary Tract Carcinoma | 1/54 2% | 2/950 0% |
| Bladder Carcinoma | 0/58 0% | 3/956 0% |
| Esophageal Squamous Cell Carcinoma | 1/51 2% | 6/2550 0% |
| Other Sarcomas | 0/69 0% | 2/699 0% |
| Breast Carcinoma | 1/144 1% | 7/3264 0% |
| Medulloblastoma | 0/0 0% | 1/450 0% |
| Non-Cancerous | 0/104 0% | 2/830 0% |
| Prostate Carcinoma | 0/13 0% | 4/2105 0% |
| Glioma | 0/52 0% | 3/2127 0% |
| Ovarian Carcinoma | 0/109 0% | 1/998 0% |
| Neuroblastoma | 1/87 1% | 0/1331 0% |
Mutation Distribution
Where IMPA1 is mutated · all tissues, split by cell line vs tissue
How many mutations in IMPA1 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 324 mutations in IMPA1
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 |
|---|