| KCNA10 |
|---|
| Full Name | Potassium Voltage-Gated Channel Subfamily A Member 10 |
| Category | Gene |
| Path | /genes/kcna10 |
| Chromosome | 1p21.3 |
| Protein | Potassium voltage-gated channel subfamily A member 10 |
KCNA10 (Potassium Voltage-Gated Channel Subfamily A Member 10) encodes a voltage-gated potassium (Kv) channel subunit. Unlike other Kv1 family members, KCNA10 has unique properties including a slower inactivation rate and activation at more negative membrane potentials. This gene is located on chromosome 1p21.3.
KCNA10 forms functional potassium channels with distinct biophysical properties:
- Renal Potassium Secretion: KCNA10 plays a crucial role in potassium secretion in renal tubular cells, particularly in the connecting tubule and cortical collecting duct
- Inner Ear Function: Expressed in hair cells of the inner ear, KCNA10 contributes to potassium homeostasis essential for auditory transduction
- Vascular Tone: Some studies suggest a role in regulating vascular smooth muscle tone
- Unique Gating Properties: KCNA10 activates at more negative voltages compared to other Kv1 channels, allowing it to open at resting membrane potentials
KCNA10 mutations and dysregulation are associated with:
- Renal Disorders:
- Hypokalemic periodic paralysis (secondary)
- Renal potassium wasting
- Bartter syndrome-like phenotypes
- Hearing Loss:
- Nonsyndromic hearing loss
- Auditory neuropathy spectrum disorder
- Cardiovascular Effects: Potential implications in blood pressure regulation
KCNA10 shows highly tissue-specific expression:
- Kidney: Highest expression in connecting tubule and cortical collecting duct
- Inner Ear: Hair cells of the cochlea and vestibular system
- Liver: Lower expression
- Lung: Minor expression
- Heart: Trace expression
KCNA10 has distinctive properties:
- Activation: Fast activation at relatively negative voltages (-40 to -30 mV)
- Inactivation: Very slow inactivation, resulting in sustained currents
- Pharmacology: Sensitive to tetraethylammonium (TEA)
- Co-assembly: Can form homomers and heteromers with other Kv1 subunits
KCNA10 interacts with:
- KCNA1 (Kv1.1)
- KCNA2 (Kv1.2)
- KCNA4 (Kv1.4)
- KCNB1 (Kvβ1) auxiliary subunits
KCNA10 represents a potential therapeutic target for:
- Hypertension management through renal potassium channel modulation
- Hearing loss prevention/ treatment
- Disorders of potassium homeostasis
- KCNA10 in renal potassium secretion (2018)
- KCNA10 expression in the inner ear (2019)
- Voltage-gated potassium channels in kidney disease (2020)