Free for academic non-profit institutions. Other users need a Commercial license
Potassium 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, shaker-related subfamily. This member contains six membrane-spanning domains with a shaker-type repeat in the fourth segment. It belongs to the delayed rectifier class, members of which allow nerve cells to efficiently repolarize following an action potential. It plays an essential role in T-cell proliferation and activation. This gene appears to be intronless and it is clustered together with KCNA2 and KCNA10 genes on chromosome 1. [provided by RefSeq, Jul 2008]
KCNA3 (Potassium Voltage-Gated Channel Subfamily A Member 3) is a Protein Coding gene. Diseases associated with KCNA3 include Lymph Node Cancer and Autoimmune Pancreatitis. Among its related pathways are Transmission across Chemical Synapses and Potassium Channels. Gene Ontology (GO) annotations related to this gene include ion channel activity and voltage-gated ion channel activity. An important paralog of this gene is KCNA2.
Voltage-gated potassium channels (KV) belong to the 6-TM family of potassium channel that also comprises the Ca2+-activated Slo (actually 7-TM) and the Ca2+-activated SK subfamilies. The alpha-subunits contain a single pore-forming region and combine to form tetramers.
GO ID | Qualified GO term | Evidence | PubMed IDs |
---|---|---|---|
GO:0005244 | voltage-gated ion channel activity | TAS | 1373731 |
GO:0005249 | voltage-gated potassium channel activity | IBA | 21873635 |
GO:0005251 | delayed rectifier potassium channel activity | IBA,IEA | 21873635 |
GO:0005267 | potassium channel activity | IEA | -- |
GO:0005515 | protein binding | IPI | 18818304 |
GO ID | Qualified GO term | Evidence | PubMed IDs |
---|---|---|---|
GO:0005886 | plasma membrane | TAS | -- |
GO:0005887 | integral component of plasma membrane | IEA | -- |
GO:0008076 | voltage-gated potassium channel complex | IBA,TAS | 21873635 |
GO:0016020 | membrane | IEA | -- |
GO:0016021 | integral component of membrane | IBA | 21873635 |
SuperPathway | Contained pathways | ||
---|---|---|---|
1 | Potassium Channels | ||
2 | Dopamine-DARPP32 Feedback onto cAMP Pathway |
Dopamine-DARPP32 Feedback onto cAMP Pathway
-
|
|
3 | Transmission across Chemical Synapses |
.62
|
|
4 | Brain-Derived Neurotrophic Factor (BDNF) signaling pathway |
GO ID | Qualified GO term | Evidence | PubMed IDs |
---|---|---|---|
GO:0006811 | ion transport | IEA | -- |
GO:0006813 | potassium ion transport | TAS | 1373731 |
GO:0034765 | regulation of ion transmembrane transport | IEA | -- |
GO:0051260 | protein homooligomerization | IEA | -- |
GO:0055085 | transmembrane transport | IEA | -- |
Name | Status | Disease Links | Group | Role | Mechanism of Action | Clinical Trials |
---|---|---|---|---|---|---|
Potassium | Approved, Experimental | Pharma | 0 | |||
4-Aminopyridine | Approved | Pharma | Pore Blocker, Inhibitor, Antagonist, Target, antagonist | potassium channel-blocking agent | 58 | |
tetraethylammonium | Experimental, Investigational | Pharma | Inhibitor, Pore Blocker, Antagonist, Inhibition | 1 | ||
Charybdotoxin | Pharma | Pore Blocker, Inhibitor, Inhibition, blocker | 0 | |||
correolide | Pharma | Pore Blocker | 0 |
Name | Synonyms | Role | CAS Number | PubChem IDs | PubMed IDs | |
---|---|---|---|---|---|---|
noxiustoxin |
|
Inhibitor |
|
|
Compound | Action | Cas Number |
---|---|---|
Chromanol 293B | IKs blocker. Also blocks ICFTR | 163163-23-3 |
Flupirtine maleate | KV7 channel activator | 75507-68-5 |
Kaliotoxin | KV and KCa blocker | 145199-73-1 |
MaxiPost | Potassium channel modulator; exerts subtype-specific effects | 187523-35-9 |
This gene was present in the common ancestor of animals.
Organism | Taxonomy | Gene | Similarity | Type | Details |
---|---|---|---|---|---|
chimpanzee (Pan troglodytes) |
Mammalia | KCNA3 33 32 |
|
OneToOne | |
cow (Bos Taurus) |
Mammalia | KCNA3 33 32 |
|
OneToOne | |
dog (Canis familiaris) |
Mammalia | KCNA3 33 32 |
|
OneToOne | |
rat (Rattus norvegicus) |
Mammalia | Kcna3 32 |
|
||
oppossum (Monodelphis domestica) |
Mammalia | KCNA3 33 |
|
OneToOne | |
mouse (Mus musculus) |
Mammalia | Kcna3 17 33 32 |
|
||
platypus (Ornithorhynchus anatinus) |
Mammalia | KCNA3 33 |
|
OneToOne | |
chicken (Gallus gallus) |
Aves | CKV1.1 33 |
|
OneToOne | |
KCNA3 32 |
|
||||
lizard (Anolis carolinensis) |
Reptilia | KCNA3 33 |
|
OneToOne | |
tropical clawed frog (Silurana tropicalis) |
Amphibia | kcna1 32 |
|
||
African clawed frog (Xenopus laevis) |
Amphibia | kcna3b-A-prov 32 |
|
||
zebrafish (Danio rerio) |
Actinopterygii | KCNA3 (2 of 2) 33 |
|
OneToMany | |
KCNA3 (1 of 2) 33 |
|
OneToMany | |||
LOC100330283 32 |
|
||||
African malaria mosquito (Anopheles gambiae) |
Insecta | AgaP_AGAP000254 32 |
|
||
fruit fly (Drosophila melanogaster) |
Insecta | Sh 34 32 |
|
||
worm (Caenorhabditis elegans) |
Secernentea | shk-1 32 |
|
||
Y55F3C.3 34 |
|
|
SNP ID | Clin | Chr 01 pos | Variation | AA Info | Type |
---|---|---|---|---|---|
rs1553187844 | uncertain-significance, not provided | 110,674,409(-) | T/C | coding_sequence_variant, genic_upstream_transcript_variant, missense_variant, upstream_transcript_variant | |
rs1000190886 | -- | 110,662,037(-) | C/T | genic_downstream_transcript_variant, intron_variant | |
rs1000230859 | -- | 110,675,666(-) | G/A | upstream_transcript_variant | |
rs1000324636 | -- | 110,668,094(-) | C/A/G/T | genic_downstream_transcript_variant, intron_variant | |
rs1000512882 | -- | 110,663,300(-) | T/C | genic_downstream_transcript_variant, intron_variant |
Variant ID | Type | Subtype | PubMed ID |
---|---|---|---|
nsv1122384 | CNV | deletion | 24896259 |
Disorder | Aliases | PubMed IDs |
---|---|---|
lymph node cancer |
|
|
autoimmune pancreatitis |
|
|