Neuronal calcium sensor, regulator of G protein-coupled receptor phosphorylation in a calcium dependent manner. Directly regulates GRK1 (RHOK), but not GRK2 to GRK5. Can substitute for calmodulin (By similarity). Stimulates PI4KB kinase activity (By similarity). Involved in long-term synaptic plasticity through its interaction with PICK1 (By similarity). May also play a role in neuron differentiation through inhibition of the activity of N-type voltage-gated calcium channel.
Specificity
Natural and recombinant Bovine Neuronal calcium sensor 1
Subcellular Location
Golgi apparatus Golgi stack membrane Peripheral membrane protein Cell junction synapse postsynaptic cell membrane postsynaptic density Cytoplasm perinuclear region Associated with Golgi stacks. Post-synaptic densities of dendrites, and in the pre-synaptic nerve terminal at neuromuscular junctions.
Interacts in a calcium-independent manner with PI4KB, but only if myristoylated. This binding competes with CALN2/CABP7 binding to PI4KB. Interacts with KCND2, ARF1, ARF3, ARF5 and ARF6 (By similarity). Interacts in a calcium-dependent manner with PICK1 (via AH domain) (By similarity). Interacts with IL1RAPL1.
"Novel Ca2+-modulated frequenin-ROS-GC transduction machinery in bovine hippocampus." Fik-Rymarkiewicz E., Duda T., Sharma R.K. Submitted (2005-11) to the EMBL/GenBank/DDBJ databases
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