Aliases for KCNB2 Gene
- Potassium Voltage-Gated Channel Subfamily B Member 2 2 3
- Potassium Channel, Voltage Gated Shab Related Subfamily B, Member 2 3 5
- Potassium Voltage-Gated Channel, Shab-Related Subfamily, Member 2 2 3
- Voltage-Gated Potassium Channel Subunit Kv2.2 3 4
- Delayed Rectifier Potassium Channel Protein 3
- Potassium Channel Kv2.2 3
- KV2.2 3
External Ids for KCNB2 Gene
Previous GeneCards Identifiers for KCNB2 Gene
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, shab-related subfamily. This member is a delayed rectifier potassium channel. The gene is expressed in gastrointestinal smooth muscle cells. [provided by RefSeq, Jul 2008]
GeneCards Summary for KCNB2 Gene
KCNB2 (Potassium Voltage-Gated Channel Subfamily B Member 2) is a Protein Coding gene. Diseases associated with KCNB2 include brugada syndrome. Among its related pathways are Transmission across Chemical Synapses and Potassium Channels. GO annotations related to this gene include ion channel activity and delayed rectifier potassium channel activity. An important paralog of this gene is KCNB1.
UniProtKB/Swiss-Prot for KCNB2 Gene
Voltage-gated potassium channel that mediates transmembrane potassium transport in excitable membranes, primarily in the brain and smooth muscle cells. Channels open or close in response to the voltage difference across the membrane, letting potassium ions pass in accordance with their electrochemical gradient. Homotetrameric channels mediate a delayed-rectifier voltage-dependent outward potassium current that display rapid activation and slow inactivation in response to membrane depolarization. Can form functional homotetrameric and heterotetrameric channels that contain variable proportions of KCNB1; channel properties depend on the type of alpha subunits that are part of the channel. Can also form functional heterotetrameric channels with other alpha subunits that are non-conducting when expressed alone, such as KCNS1 and KCNS2, creating a functionally diverse range of channel complexes. In vivo, membranes probably contain a mixture of heteromeric potassium channel complexes, making it difficult to assign currents observed in intact tissues to any particular potassium channel family member. Contributes to the delayed-rectifier voltage-gated potassium current in cortical pyramidal neurons and smooth muscle cells.
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.