Voltage dependent Ca2+ channels (CaV channels) are pivotal players in many physiological roles such as secretion, contraction, migration and excitation.The voltage dependent Ca2+ channels are composed of several subunits; α1, β, α2δ and γ. CaV channels were originally divided into six physiological types: L, N, P, Q, R, and T type.The CaV2.2 (formally named α1B) composes the α1 poreforming subunit for the N type Ca2+ channel family. They are involved in neurotransmitter release from central neurons, including glutamate, γ-aminobutyric acid, acetylcholine, dopamine and noradrenaline.The CaV2.2 is expressed preferentially in the central nervous system, where along with CaV2.1, it is responsible for pre-synaptic Ca2+ influx and neurotransmitter release.The CaV2.2 channel is negatively regulated by many different GPCRs. There are two ways that this is done: either by directly binding Gβγ to the channel or by an indirect mechanism involving second messenger and channel phosphorylation.