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KCND3

Synonyms
BRGDA9, KCND3L, KCND3S, KSHIVB, KV4.3, SCA19, SCA22
External resources
Summary
Voltage-gated potassium (Kv) channels represent the most complex class of voltage-gated ion channels from both functional and structural standpoints. Their diverse functions include regulating neurotransmitter release, heart rate, insulin secretion, neuronal excitability, epithelial electrolyte transport, smooth muscle contraction, and cell volume. Four sequence-related potassium channel genes - shaker, shaw, shab, and shal - have been identified in Drosophila, and each has been shown to have human homolog(s). This gene encodes a member of the potassium channel, voltage-gated, shal-related subfamily, members of which form voltage-activated A-type potassium ion channels and are prominent in the repolarization phase of the action potential. This member includes two isoforms with different sizes, which are encoded by alternatively spliced transcript variants of this gene.

Variant Counts

Variant classification counts, according to ACMG guideline on all identified variants among our tested samples, are listed. The variants with over 5% variant frequency in population genome databases ( gnomAD, dbSNP, etc.) are excluded.

Pathogenic
2
Likely pathogenic
0
VUS
576
Likely benign
1,067
Benign
88

Patient Phenotypes

Proportions of phenotypes among 2 patients carrying pathogenic or likely pathogenic variants on KCND3 gene are displayed below. The following symptoms were found in patients with a variant in KCND3. However, patients may have been diagnosed with a different variant.

Phenotype class
Patients in 3billion (%)
Abnormality of the immune system
100%
Abnormality of the cardiovascular system
50%
Abnormality of the digestive system
50%
Abnormality of the musculoskeletal system
50%
Abnormality of the nervous system
50%
Abnormal cellular phenotype
0%
Abnormality of blood and blood forming tissues
0%
Abnormality of head or neck
0%
Abnormality of limbs
0%
Abnormality of metabolism homeostasis
0%
Abnormality of prenatal development or birth
0%
Abnormality of the breast
0%
Abnormality of the ear
0%
Abnormality of the endocrine system
0%
Abnormality of the eye
0%
Abnormality of the genitourinary system
0%
Abnormality of the integument
0%
Abnormality of the respiratory system
0%
Abnormality of the thoracic cavity
0%
Abnormality of the voice
0%
Constitutional symptom
0%
Growth abnormality
0%
Neoplasm
0%

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