This gene encodes a member of the family of voltage-gated potassium (Kv) channel-interacting proteins (KCNIPs), which belong 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. This protein member also interacts with presenilin. Multiple alternatively spliced transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2008].
Holmqvist, Cao, Hernandez-Pineda, Jacobson, Carroll, Sung, Betty, Ge, Gilbride, Brown, Jurman, Lawson, Silos-Santiago, Xie, Covarrubias, Rhodes, Distefano, An: "Elimination of fast inactivation in Kv4 A-type potassium channels by an auxiliary subunit domain." in: Proceedings of the National Academy of Sciences of the United States of America, Vol. 99, Issue 2, pp. 1035-40, (2002) (PubMed).
Morohashi, Hatano, Ohya, Takikawa, Watabiki, Takasugi, Imaizumi, Tomita, Iwatsubo: "Molecular cloning and characterization of CALP/KChIP4, a novel EF-hand protein interacting with presenilin 2 and voltage-gated potassium channel subunit Kv4." in: The Journal of biological chemistry, Vol. 277, Issue 17, pp. 14965-75, (2002) (PubMed).