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 | 631 | 83 | 544 |
| Samples | 534 | 75 | 455 |
| Peptides | 396 | 53 | 357 |
Function
C8B · Complement C8 beta chain
This gene encodes one of the three subunits of the complement component 8 (C8) protein. C8 is composed of equimolar amounts of alpha, beta and gamma subunits, which are encoded by three separate genes. C8 is one component of the membrane attack complex, which mediates cell lysis, and it initiates membrane penetration of the complex. This protein mediates the interaction of C8 with the C5b-7 membrane attack complex precursor. In humans deficiency of this protein is associated with increased risk of meningococcal infections. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2013].
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 396 amino-acid changes on canonical ENST00000371237 · 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 C8B · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in C8B – 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 | 13/210 6% | 132/1899 7% |
| Gastrointestinal Stromal Tumour | 0/0 0% | 6/133 5% |
| T-Cell Non-Hodgkins Lymphoma | 1/26 4% | 0/0 0% |
| Endometrial Carcinoma | 2/42 5% | 18/612 3% |
| T-Lymphoblastic Leukemia | 1/40 2% | 0/0 0% |
| Non-Small Cell Lung Carcinoma | 9/304 3% | 30/1390 2% |
| Colorectal Carcinoma | 9/143 6% | 57/3239 2% |
| Other Solid Cancers | 0/94 0% | 30/1515 2% |
| Squamous Cell Lung Carcinoma | 2/57 4% | 11/810 1% |
| Plasma Cell Myeloma | 3/44 7% | 2/305 1% |
| Gastric Carcinoma | 1/74 1% | 25/1809 1% |
| Esophageal Carcinoma | 2/23 9% | 7/769 1% |
| Chondrosarcoma | 0/14 0% | 1/75 1% |
| Other Sarcomas | 4/69 6% | 4/699 1% |
| Glioblastoma | 1/98 1% | 0/0 0% |
| Ovarian Carcinoma | 5/109 5% | 6/998 1% |
| Osteosarcoma | 2/45 4% | 0/166 0% |
| Ewings Sarcoma | 3/63 5% | 0/262 0% |
| Bladder Carcinoma | 0/58 0% | 9/956 1% |
| Cervical Carcinoma | 0/35 0% | 4/422 1% |
| Neuroendocrine Tumour | 1/154 1% | 5/577 1% |
| Small Cell Lung Carcinoma | 0/9 0% | 6/752 1% |
| Esophageal Squamous Cell Carcinoma | 2/51 4% | 18/2550 1% |
| Head and Neck Carcinoma | 1/85 1% | 11/1574 1% |
| Biliary Tract Carcinoma | 0/54 0% | 7/950 1% |
| Glioma | 1/52 2% | 13/2127 1% |
| Prostate Carcinoma | 3/13 23% | 8/2105 0% |
| Rhabdomyosarcoma | 1/33 3% | 0/171 0% |
| Hepatocellular Carcinoma | 0/46 0% | 11/2210 0% |
| Non-Cancerous | 0/104 0% | 4/830 0% |
Mutation Distribution
Where C8B is mutated · all tissues, split by cell line vs tissue
How many mutations in C8B 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 18 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 631 mutations in C8B
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 |
|---|