# SDHAF2

Source: https://onco.cc/targets/sdhaf2/  
OnCo record `sdhaf2` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

SDHAF2 (Succinate dehydrogenase assembly factor 2, mitochondrial) is a gene. In the public catalogues the evidence so far is association rather than a proven role. Tied to Neuroendocrine tumours and Ovarian cancer.

## Summary

Plays an essential role in the assembly of succinate dehydrogenase (SDH), an enzyme complex (also referred to as respiratory complex II) that is a component of both the tricarboxylic acid (TCA) cycle and the mitochondrial electron transport chain, and which couples the oxidation of succinate to fumarate with the reduction of ubiquinone (coenzyme Q) to ubiquinol. Required for flavinylation (covalent attachment of FAD) of the flavoprotein subunit SDHA of the SDH catalytic dimer.

Open Targets scores its association with cancer at 0.79 (direct and indirect evidence; datatypes literature 0.79, genetic association 0.85, somatic mutation 0.95, genetic literature 0.81).

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: succinate dehydrogenase complex assembly factor 2; Succinate dehydrogenase assembly factor 2, mitochondrial; FLJ20487; SDH5; PGL2; C11orf79
- Tags: cancer-genes-wave
- Symbol: SDHAF2
- Class: other
- Biology: Plays an essential role in the assembly of succinate dehydrogenase (SDH), an enzyme complex (also referred to as respiratory complex II) that is a component of both the tricarboxylic acid (TCA) cycle and the mitochondrial electron transport chain, and which couples the oxidation of succinate to fumarate with the reduction of ubiquinone (coenzyme Q) to ubiquinol. Required for flavinylation (covalent attachment of FAD) of the flavoprotein subunit SDHA of the SDH catalytic dimer. Location: Mitochondrion matrix (UniProt). Locus 11q12.2 (HGNC).
- Where found: Neuroendocrine tumours: Open Targets association 0.83 with neuroendocrine neoplasm (MONDO_0019496); Ovarian cancer: Open Targets association 0.51 with ovarian cancer (MONDO_0008170)

## Notes

- Written by scripts/fetch-cancer-genes.ts from CIViC, Open Targets, IntOGen, HGNC and UniProt; the function text is UniProt's, condensed and in UK spelling. Roles: none stated by the sources. Evidence tier "association-only" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.

## Sources

- HGNC HGNC:26034: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:26034
- UniProt Q9NX18: https://www.uniprot.org/uniprotkb/Q9NX18/entry
- NCBI Gene 54949: https://www.ncbi.nlm.nih.gov/gene/54949
- Ensembl ENSG00000167985: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000167985

## Connected records

- collections: [Open Targets Platform](https://onco.cc/collections/open-targets/)
- cancers: [Neuroendocrine tumours](https://onco.cc/cancers/neuroendocrine/), [Ovarian cancer](https://onco.cc/cancers/ovarian/)

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JSON: https://onco.cc/api/v1/entities/sdhaf2.json