Voltage-sensor protein present on the post-synaptic side of glutamatergic mossy fibers and granule cells in the cerebellum. Despite the presence of a voltage-sensor segment, does not form a functional ion channel and its precise role remains unclear. Undergoes both rapid and slow structural rearrangements in response to changes in voltage. Contains a zinc-binding site that can regulate the slow conformational transition.
Subcellular locations: Cell membrane, Cell projection, Dendrite, Perikaryon
Present in the dendrites and soma of cerebellar granule neurons, but not in their axon.