# KCND3

Source: https://onco.cc/targets/kcnd3/  
OnCo record `kcnd3` (Target). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

KCND3 (A-type voltage-gated potassium channel KCND3) is a gene. The public catalogues list it as a drug target, and an approved or late-stage drug is recorded against it.

## Summary

Pore-forming (alpha) subunit of voltage-gated A-type potassium channels that mediates transmembrane potassium transport in excitable membranes, in brain and heart. In cardiomyocytes, may generate the transient outward potassium current I(To). In neurons, may conduct the transient subthreshold somatodendritic A-type potassium current (ISA).

Open Targets scores its association with cancer at 0.54 (direct and indirect evidence; datatypes literature 0.17, animal model 0.48, genetic association 0.36, clinical 0.76).

## Fields

- Kind: Target
- Last checked: 2026-09-23
- Also known as: potassium voltage-gated channel subfamily D member 3; A-type voltage-gated potassium channel KCND3; Kv4.3; KSHIVB; SCA22; SCA19
- Tags: cancer-genes-wave
- Symbol: KCND3
- Class: other
- Biology: Pore-forming (alpha) subunit of voltage-gated A-type potassium channels that mediates transmembrane potassium transport in excitable membranes, in brain and heart. In cardiomyocytes, may generate the transient outward potassium current I(To). In neurons, may conduct the transient subthreshold somatodendritic A-type potassium current (ISA). Kinetics properties are characterised by fast activation at subthreshold membrane potentials, rapid inactivation, and quick recovery from inactivation. Channel properties are modulated by interactions with regulatory subunits. Interaction with the regulatory subunits KCNIP1 or KCNIP2 modulates the channel gating kinetics namely channel activation and inactivation kinetics and rate of recovery from inactivation. Location: Cell membrane; Cell membrane, sarcolemma; Cell projection, dendrite (UniProt). Locus 1p13.2 (HGNC).

## 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: Open Targets known-drug datatype score 0.76. Evidence tier "approved-drug" is the strongest of those signals.
- Prevalence not recorded: none of the sources gives a positivity rate.

## Sources

- HGNC HGNC:6239: https://www.genenames.org/data/gene-symbol-report/#!/hgnc_id/HGNC:6239
- UniProt Q9UK17: https://www.uniprot.org/uniprotkb/Q9UK17/entry
- NCBI Gene 3752: https://www.ncbi.nlm.nih.gov/gene/3752
- Ensembl ENSG00000171385: https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000171385

## Connected records

- collections: [Open Targets Platform](https://onco.cc/collections/open-targets/)

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JSON: https://onco.cc/api/v1/entities/kcnd3.json