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 | 661 | 58 | 603 |
| Samples | 148 | 13 | 135 |
| Peptides | 138 | 19 | 120 |
Function
CD8B · CD8 subunit beta
The CD8 antigen is a cell surface glycoprotein found on most cytotoxic T lymphocytes that mediates efficient cell-cell interactions within the immune system. The CD8 antigen, acting as a coreceptor, and the T-cell receptor on the T lymphocyte recognize antigens displayed by an antigen presenting cell (APC) in the context of class I MHC molecules. The functional coreceptor is either a homodimer composed of two alpha chains, or a heterodimer composed of one alpha and one beta chain. Both alpha and beta chains share significant homology to immunoglobulin variable light chains. This gene encodes the CD8 beta chain isoforms. Multiple alternatively spliced transcript variants encoding distinct membrane associated or secreted isoforms have been described. A pseudogene, also located on chromosome 2, has been identified. [provided by RefSeq, May 2010].
Isoforms & Proteins
6 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 91 amino-acid changes on canonical ENST00000331469 · 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 CD8B · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in CD8B – 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 | 0/210 0% | 34/1899 2% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 2/133 2% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 10/810 1% |
| Non-Small Cell Lung Carcinoma | 5/304 2% | 14/1390 1% |
| Hodgkins Lymphoma | 0/16 0% | 1/122 1% |
| Endometrial Carcinoma | 0/42 0% | 3/612 0% |
| Cervical Carcinoma | 0/35 0% | 2/422 0% |
| Thyroid Gland Carcinoma | 0/45 0% | 7/1592 0% |
| Colorectal Carcinoma | 2/143 1% | 11/3239 0% |
| Non-Cancerous | 0/104 0% | 3/830 0% |
| Other Solid Cancers | 0/94 0% | 5/1515 0% |
| Gastric Carcinoma | 1/74 1% | 4/1809 0% |
| Ovarian Carcinoma | 1/109 1% | 2/998 0% |
| Esophageal Carcinoma | 0/23 0% | 2/769 0% |
| Esophageal Squamous Cell Carcinoma | 1/51 2% | 5/2550 0% |
| Hepatocellular Carcinoma | 0/46 0% | 5/2210 0% |
| B-Cell Non-Hodgkins Lymphoma | 1/88 1% | 4/2534 0% |
| Breast Carcinoma | 1/144 1% | 5/3264 0% |
| Glioma | 0/52 0% | 4/2127 0% |
| Neuroendocrine Tumour | 0/154 0% | 1/577 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 1/752 0% |
| Pancreatic Carcinoma | 0/89 0% | 2/1611 0% |
| Bladder Carcinoma | 0/58 0% | 1/956 0% |
| Kidney Carcinoma | 0/85 0% | 2/1862 0% |
| Biliary Tract Carcinoma | 0/54 0% | 1/950 0% |
| Prostate Carcinoma | 0/13 0% | 2/2105 0% |
| Head and Neck Carcinoma | 0/85 0% | 1/1574 0% |
| Other Blood Cancers | 0/61 0% | 1/2725 0% |
| B-Lymphoblastic Leukemia | 1/55 2% | 0/2640 0% |
Mutation Distribution
Where CD8B is mutated · all tissues, split by cell line vs tissue
How many mutations in CD8B 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 53 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 661 mutations in CD8B
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 |
|---|