Kcnd2 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
KCND2 (Potassium Voltage-Gated Channel Subfamily D Member 2) encodes the Kv4.2 subunit, a rapidly inactivating (A-type) potassium channel critical for neuronal excitability and synaptic integration. Located on chromosome 7q31, KCND2 encodes a protein of 647 amino acids.
| Property |
Value |
| Gene Symbol |
KCND2 |
| Full Name |
Potassium Voltage-Gated Channel Subfamily D Member 2 |
| Chromosomal Location |
7q31.2 |
| NCBI Gene ID |
8936 |
| OMIM ID |
605721 |
| Ensembl ID |
ENSG00000163637 |
| UniProt ID |
Q9NZV8 |
The Kv4.2 protein contains:
- Six transmembrane domains (S1-S6)
- Voltage sensor domain
- Rapid inactivation domain (N-terminal A-type inactivation)
- Postsynaptic density protein (PSD-95) interaction motifs
Kv4.2 channels are critical for:
- Dendritic integration - Shape excitatory postsynaptic potentials
- Backpropagation - Enable action potential propagation into dendrites
- Learning and memory - Regulate synaptic plasticity
- Epilepsy control - Prevent hyperexcitability
- Temporal Lobe Epilepsy - Kv4.2 dysfunction contributes to seizure generation
- Alzheimer's Disease - Altered channel expression affects neuronal function
- Parkinson's Disease - Impaired A-type currents in dopaminergic neurons
- Neuropathic Pain - Upregulation contributes to hyperexcitability
- Schizophrenia - Altered expression in prefrontal cortex
- Autism Spectrum Disorders - Genetic variants identified
KCND2 is highly expressed in:
- Hippocampus - CA1 pyramidal neurons (dendrites)
- Cerebral cortex - Layer II/III pyramidal neurons
- Striatum - Medium spiny neurons
- Cerebellum - Purkinje cells
- Anti-epileptic drugs - Targeting Kv4.2 for seizure control
- Neuroprotection - Modulating A-type currents in neurodegeneration
- Song WJ, et al. (2005). "Kv4.2 channels and dendritic signal processing." J Physiol. PMID:15890705
- Kim J, et al. (2007). "Kv4.2 channel dysfunction in neurological disorders." Exp Neurol. PMID:17291556
The study of Kcnd2 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Birnbaum SG, et al. (2004). "Structure and function of Kv4-family transient outward potassium channels." Physiol Rev. 84(3):803-833. PMID:15269333
- Jerng HH, et al. (2004). "Molecular complexity of the Kv4.2 channel complex." J Biol Chem. 279(15):15240-15248. PMID:14701853
- Patel SP, et al. (2004). "Regulation of Kv4.2 channels by dopamine D1-class receptors." J Neurophysiol. 92(5):2811-2819. PMID:15240760
- Shibata R, et al. (2000). "A Kv4.2 truncation mutation in a patient with temporal lobe epilepsy." Neurobiol Dis. 7(6):548-551. PMID:11124754
- Hoffman DA, et al. (1997). "K+ channel regulation of signal propagation in dendrites of hippocampal pyramidal neurons." Nature. 387(6636):869-875. PMID:9202119