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 | 101 | 6 | 94 |
| Samples | 99 | 6 | 92 |
| Peptides | 89 | 4 | 84 |
Function
SDHB · Succinate dehydrogenase complex iron sulfur subunit B
This tumor suppressor gene encodes the iron-sulfur protein subunit of the succinate dehydrogenase (SDH) enzyme complex which plays a critical role in mitochondria. The SDH enzyme complex is composed of four nuclear-encoded subunits. This enzyme complex converts succinate to fumarate which releases electrons as part of the citric acid cycle, and the enzyme complex additionally provides an attachment site for released electrons to be transferred to the oxidative phosphorylation pathway. The SDH enzyme complex plays a role in oxygen-related gene regulation through its conversion of succinate, which is an oxygen sensor that stabilizes the hypoxia-inducible factor 1 (HIF1) transcription factor. Sporadic and familial mutations in this gene result in paragangliomas, pheochromocytoma, and gastrointestinal stromal tumors, supporting a link between mitochondrial dysfunction and tumorigenesis. Mutations in this gene are also implicated in nuclear type 4 mitochondrial complex II deficiency. [provided by RefSeq, Jun 2022].
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.
| Transcript | UniProt | Mutations | Peptides |
|---|---|---|---|
| ENST00000375499 | P21912 | 100 | 88 |
| ENST00000491274 | A0A087WWT1* | 1 | 1 |
Gene Properties
Recurrent Mutations
All 88 amino-acid changes on canonical ENST00000375499 · 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 SDHB · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in SDHB – 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 |
|---|---|---|
| Glioblastoma | 1/98 1% | 0/0 0% |
| Endometrial Carcinoma | 0/42 0% | 5/612 1% |
| Hodgkins Lymphoma | 0/16 0% | 1/122 1% |
| Squamous Cell Lung Carcinoma | 0/57 0% | 6/810 1% |
| Cervical Carcinoma | 0/35 0% | 3/422 1% |
| Gastric Carcinoma | 0/74 0% | 10/1809 1% |
| Melanoma | 0/210 0% | 11/1899 1% |
| Rhabdomyosarcoma | 0/33 0% | 1/171 1% |
| Osteosarcoma | 0/45 0% | 1/166 1% |
| Non-Small Cell Lung Carcinoma | 3/304 1% | 5/1390 0% |
| Mesothelioma | 1/62 2% | 0/165 0% |
| Burkitts Lymphoma | 0/32 0% | 1/196 1% |
| Bladder Carcinoma | 0/58 0% | 4/956 0% |
| Other Solid Cancers | 0/94 0% | 6/1515 0% |
| Colorectal Carcinoma | 1/143 1% | 9/3239 0% |
| Hepatocellular Carcinoma | 0/46 0% | 6/2210 0% |
| Non-Cancerous | 0/104 0% | 2/830 0% |
| Thyroid Gland Carcinoma | 0/45 0% | 3/1592 0% |
| Head and Neck Carcinoma | 0/85 0% | 3/1574 0% |
| Kidney Carcinoma | 0/85 0% | 3/1862 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 1/752 0% |
| B-Cell Non-Hodgkins Lymphoma | 0/88 0% | 3/2534 0% |
| Prostate Carcinoma | 0/13 0% | 2/2105 0% |
| Breast Carcinoma | 0/144 0% | 3/3264 0% |
| Ovarian Carcinoma | 0/109 0% | 1/998 0% |
| Glioma | 0/52 0% | 2/2127 0% |
| Esophageal Squamous Cell Carcinoma | 0/51 0% | 1/2550 0% |
Mutation Distribution
Where SDHB is mutated · all tissues, split by cell line vs tissue
How many mutations in SDHB 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 101 mutations in SDHB
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 |
|---|