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KCNIP2

This gene encodes a member of the family of voltage-gated potassium (Kv) channel-interacting proteins (KCNIPs), which belongs to the recoverin branch of the EF-hand superfamily. Members of the KCNIP family are small calcium binding proteins. They all have EF-hand-like domains, and differ from each other in the N-terminus. They are integral subunit components of native Kv4 channel complexes. They may regulate A-type currents, and hence neuronal excitability, in response to changes in intracellular calcium. Multiple alternatively spliced transcript variants encoding distinct isoforms have been identified from this gene.
Protein class

Transporters

Predicted location

Intracellular

Single cell type specificity

Cell type enhanced (Cardiomyocytes, Bipolar cells, Horizontal cells, Inhibitory neurons, Cone photoreceptor cells, Excitatory neurons)

Immune cell specificity

Immune cell enhanced (naive B-cell)

Cell line specificity

Cell line enhanced (HEL, HMC-1)

Interaction

Component of heteromultimeric potassium channels. Identified in potassium channel complexes containing KCND1, KCND2, KCND3, KCNIP1, KCNIP2, KCNIP3, KCNIP4, DPP6 and DPP10 (By similarity). The KCND2-KCNIP2 channel complex contains four KCND2 and four KCNIP2 subunits (PubMed:14623880, PubMed:14980201). Interacts with KCND2 (PubMed:10676964, PubMed:14623880, PubMed:14980201). Isoform 1 and isoform 3 interact with KCND3 isoform 1. Probably part of a complex consisting of KCNIP1, KCNIP2 isoform 3 and KCND2. At least isoform 2 and isoform 3 can self-associate to form homodimers and homotetramers. Isoform 3 interacts with KCNIP1 in a calcium-dependent manner.

Molecular function

Ion channel, Potassium channel, Voltage-gated channel

More Types Infomation

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