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 | 279 | 51 | 226 |
| Samples | 263 | 45 | 216 |
| Peptides | 170 | 32 | 144 |
Function
NAPSA · Napsin A aspartic peptidase
This gene encodes a member of the peptidase A1 family of aspartic proteases. The encoded preproprotein is proteolytically processed to generate an activation peptide and the mature protease. The activation peptides of aspartic proteinases function as inhibitors of the protease active site. These peptide segments, or pro-parts, are deemed important for correct folding, targeting, and control of the activation of aspartic proteinase zymogens. The encoded protease may play a role in the proteolytic processing of pulmonary surfactant protein B in the lung and may function in protein catabolism in the renal proximal tubules. This gene has been described as a marker for lung adenocarcinoma and renal cell carcinoma. [provided by RefSeq, Feb 2016].
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 |
|---|---|---|---|
| ENST00000253719 | O96009 | 279 | 170 |
Gene Properties
Recurrent Mutations
All 170 amino-acid changes on canonical ENST00000253719 · 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 NAPSA · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in NAPSA – 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 | 3/25 12% | 0/0 0% |
| Other Solid Cancers | 0/94 0% | 38/1515 3% |
| Endometrial Carcinoma | 5/42 12% | 9/612 1% |
| Hodgkins Lymphoma | 1/16 6% | 1/122 1% |
| Melanoma | 4/210 2% | 20/1899 1% |
| Acute Myeloid Leukemia | 1/90 1% | 0/0 0% |
| Colorectal Carcinoma | 5/143 4% | 29/3239 1% |
| Other Sarcomas | 1/69 1% | 6/699 1% |
| Gastric Carcinoma | 3/74 4% | 14/1809 1% |
| Plasma Cell Myeloma | 2/44 5% | 1/305 0% |
| Thyroid Gland Carcinoma | 1/45 2% | 13/1592 1% |
| Non-Cancerous | 0/104 0% | 8/830 1% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 1/133 1% |
| Non-Small Cell Lung Carcinoma | 3/304 1% | 8/1390 1% |
| Head and Neck Carcinoma | 1/85 1% | 8/1574 1% |
| Esophageal Carcinoma | 0/23 0% | 4/769 1% |
| Glioma | 4/52 8% | 7/2127 0% |
| Bladder Carcinoma | 0/58 0% | 5/956 1% |
| Osteosarcoma | 1/45 2% | 0/166 0% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 4/810 0% |
| Ovarian Carcinoma | 3/109 3% | 2/998 0% |
| Burkitts Lymphoma | 1/32 3% | 0/196 0% |
| Cervical Carcinoma | 0/35 0% | 2/422 0% |
| Meningioma | 1/3 33% | 0/252 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 3/752 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 8/2550 0% |
| Other Blood Cancers | 3/61 5% | 4/2725 0% |
| Prostate Carcinoma | 0/13 0% | 5/2105 0% |
| Medulloblastoma | 0/0 0% | 1/450 0% |
| Hepatocellular Carcinoma | 1/46 2% | 3/2210 0% |
Mutation Distribution
Where NAPSA is mutated · all tissues, split by cell line vs tissue
How many mutations in NAPSA 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 279 mutations in NAPSA
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 |
|---|