Ionotropic glutamate receptor. L-glutamate acts as an excitatory neurotransmitter at many synapses in the central nervous system. Binding of the excitatory neurotransmitter L-glutamate induces a conformation change, leading to the opening of the cation channel, and thereby converts the chemical signal to an electrical impulse. The receptor then desensitizes rapidly and enters a transient inactive state, characterized by the presence of bound agonist. In the presence of CACNG4 or CACNG7 or CACNG8, shows resensitization which is characterized by a delayed accumulation of current flux upon continued application of glutamate.
Specificity
Natural and recombinant Human Glutamate receptor 2
Subcellular Location
Cell membrane Multi-pass membrane protein Endoplasmic reticulum membrane Multi-pass membrane protein Cell junction synapse postsynaptic cell membrane Multi-pass membrane protein Interaction with CACNG2, CNIH2 and CNIH3 promotes cell surface expression.
Homotetramer or heterotetramer of pore-forming glutamate receptor subunits. Tetramers may be formed by the dimerization of dimers. May interact with MPP4. Forms a ternary complex with GRIP1 and CSPG4. Interacts with PICK1 (via PDZ domain). Interacts with PRKCABP, GRIP1 and GRIP2 (By similarity). Interacts with GRIA1 and SYNDIG1 (By similarity). Interacts with LRFN1 (By similarity). Found in a complex with GRIA1, GRIA3, GRIA4, CNIH2, CNIH3, CACNG2, CACNG3, CACNG4, CACNG5, CACNG7 and CACNG8. Interacts with CACNG5.