Regulatory subunit of the voltage-gated calcium channel that gives rise to L-type calcium currents. Increases CACNA1B peak calcium current and shifts the voltage dependencies of channel activation and inactivation. Increases CACNA1C peak calcium current and shifts the voltage dependencies of channel activation and inactivation.
Background References
1. Collin T et al. Cloning, chromosomal location and functional expression of the human voltage-dependent calcium-channel beta 3 subunit. Eur J Biochem 220:257-262 (1994).
2. Yamada Y et al. The structures of the human calcium channel alpha 1 subunit (CACNL1A2) and beta subunit (CACNLB3) genes. Genomics 27:312-319 (1995).
Sequence Similarity
Belongs to the calcium channel beta subunit family.