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 | 1,216 | 86 | 1,105 |
| Samples | 360 | 37 | 315 |
| Peptides | 262 | 26 | 239 |
Function
SMAD3 · SMAD family member 3
The SMAD family of proteins are a group of intracellular signal transducer proteins similar to the gene products of the Drosophila gene 'mothers against decapentaplegic' (Mad) and the C. elegans gene Sma. The SMAD3 protein functions in the transforming growth factor-beta signaling pathway, and transmits signals from the cell surface to the nucleus, regulating gene activity and cell proliferation. This protein forms a complex with other SMAD proteins and binds DNA, functioning both as a transcription factor and tumor suppressor. Mutations in this gene are associated with aneurysms-osteoarthritis syndrome and Loeys-Dietz Syndrome 3. [provided by RefSeq, May 2022].
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 220 amino-acid changes on canonical ENST00000327367 · 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 SMAD3 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in SMAD3 – 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 | 2/40 5% | 0/0 0% |
| Endometrial Carcinoma | 1/42 2% | 18/612 3% |
| Colorectal Carcinoma | 12/143 8% | 85/3239 3% |
| Cervical Carcinoma | 0/35 0% | 12/422 3% |
| Melanoma | 2/210 1% | 32/1899 2% |
| Germ Cell Tumour | 0/25 0% | 3/169 2% |
| Hodgkins Lymphoma | 0/16 0% | 2/122 2% |
| Gastric Carcinoma | 3/74 4% | 24/1809 1% |
| Bladder Carcinoma | 0/58 0% | 14/956 1% |
| Non-Small Cell Lung Carcinoma | 3/304 1% | 16/1390 1% |
| Other Solid Cancers | 1/94 1% | 15/1515 1% |
| Pancreatic Carcinoma | 0/89 0% | 14/1611 1% |
| Neuroendocrine Tumour | 1/154 1% | 4/577 1% |
| Other Sarcomas | 3/69 4% | 2/699 0% |
| Head and Neck Carcinoma | 1/85 1% | 9/1574 1% |
| Squamous Cell Lung Carcinoma | 2/57 4% | 3/810 0% |
| Thyroid Gland Carcinoma | 2/45 4% | 7/1592 0% |
| Hepatocellular Carcinoma | 0/46 0% | 12/2210 1% |
| Rhabdomyosarcoma | 0/33 0% | 1/171 1% |
| Osteosarcoma | 1/45 2% | 0/166 0% |
| Mesothelioma | 0/62 0% | 1/165 1% |
| Medulloblastoma | 0/0 0% | 2/450 0% |
| Breast Carcinoma | 1/144 1% | 12/3264 0% |
| Esophageal Carcinoma | 0/23 0% | 3/769 0% |
| Glioma | 0/52 0% | 7/2127 0% |
| Non-Cancerous | 0/104 0% | 3/830 0% |
| Ovarian Carcinoma | 1/109 1% | 2/998 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 7/2550 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 2/752 0% |
| Biliary Tract Carcinoma | 0/54 0% | 2/950 0% |
Mutation Distribution
Where SMAD3 is mutated · all tissues, split by cell line vs tissue
How many mutations in SMAD3 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 1,216 mutations in SMAD3
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 |
|---|