Excitatory amino acid transporter 4 (SLC1A6)

Sodium-dependent, high-affinity amino acid transporter which mediates the uptake of L-glutamate and also L-aspartate and D-aspartate (PubMed:7791878). Functions as a symporter that transports a single amino acid molecule together with two or three Na(+) ions and a single proton, in parallel with the counter-transport of a single K(+) ion.

Mediates Cl(-) flux that's not coupled to amino acid transport; this avoids the accumulation of negative charges because of aspartate and Na(+) symport (By similarity). Plays a redundant role in the rapid removal of released glutamate from the synaptic cleft, which is vital for terminating the postsynaptic action of glutamate (Probable).