CaMKII -- Ca2+/calmodulin-dependent protein kinases II are serine/threonine-specific protein kinases that are regulated by the calmodulin complex. CaMKII phosphorylates AMPA receptors at the P2 serine 831 site. This increases channel conductance of GluA1 subunits of AMPA receptors.
CaMKII has also been shown to aid in the process of AMPA receptor exocytosis. CaMKII activity leads to endosomal docking at the membrane.