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 | 550 | 77 | 466 |
| Samples | 277 | 50 | 225 |
| Peptides | 193 | 33 | 165 |
Function
IDO1 · Indoleamine 2,3-dioxygenase 1
This gene encodes indoleamine 2,3-dioxygenase (IDO) - a heme enzyme that catalyzes the first and rate-limiting step in tryptophan catabolism to N-formyl-kynurenine. This enzyme acts on multiple tryptophan substrates including D-tryptophan, L-tryptophan, 5-hydroxy-tryptophan, tryptamine, and serotonin. This enzyme is thought to play a role in a variety of pathophysiological processes such as antimicrobial and antitumor defense, neuropathology, immunoregulation, and antioxidant activity. Through its expression in dendritic cells, monocytes, and macrophages this enzyme modulates T-cell behavior by its peri-cellular catabolization of the essential amino acid tryptophan.[provided by RefSeq, Feb 2011].
Isoforms & Proteins
2 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 193 amino-acid changes on canonical ENST00000518237 · 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 IDO1 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in IDO1 – 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 |
|---|---|---|
| Melanoma | 12/210 6% | 75/1899 4% |
| Oral Cavity Carcinoma | 2/54 4% | 0/0 0% |
| T-Lymphoblastic Leukemia | 1/40 2% | 0/0 0% |
| Glioblastoma | 2/98 2% | 0/0 0% |
| Bladder Carcinoma | 2/58 3% | 12/956 1% |
| Other Solid Cancers | 2/94 2% | 16/1515 1% |
| Endometrial Carcinoma | 0/42 0% | 7/612 1% |
| Colorectal Carcinoma | 7/143 5% | 24/3239 1% |
| Cervical Carcinoma | 2/35 6% | 2/422 0% |
| Non-Small Cell Lung Carcinoma | 4/304 1% | 10/1390 1% |
| Hodgkins Lymphoma | 0/16 0% | 1/122 1% |
| Squamous Cell Lung Carcinoma | 1/57 2% | 5/810 1% |
| Esophageal Carcinoma | 0/23 0% | 5/769 1% |
| Head and Neck Carcinoma | 2/85 2% | 7/1574 0% |
| Other Sarcomas | 2/69 3% | 2/699 0% |
| Ovarian Carcinoma | 2/109 2% | 3/998 0% |
| Burkitts Lymphoma | 0/32 0% | 1/196 1% |
| Non-Cancerous | 0/104 0% | 4/830 0% |
| Gastric Carcinoma | 2/74 3% | 6/1809 0% |
| Neuroendocrine Tumour | 2/154 1% | 1/577 0% |
| Hepatocellular Carcinoma | 0/46 0% | 9/2210 0% |
| Thyroid Gland Carcinoma | 2/45 4% | 4/1592 0% |
| Glioma | 2/52 4% | 5/2127 0% |
| Plasma Cell Myeloma | 1/44 2% | 0/305 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 7/2550 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 2/752 0% |
| B-Cell Non-Hodgkins Lymphoma | 0/88 0% | 5/2534 0% |
| Pancreatic Carcinoma | 0/89 0% | 3/1611 0% |
| Breast Carcinoma | 0/144 0% | 5/3264 0% |
| Kidney Carcinoma | 0/85 0% | 2/1862 0% |
Mutation Distribution
Where IDO1 is mutated · all tissues, split by cell line vs tissue
How many mutations in IDO1 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 41 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 550 mutations in IDO1
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 |
|---|