Mediates electroneutral potassium-chloride cotransport in mature neurons and is required for neuronal Cl- homeostasis. As major extruder of intracellular chloride, it establishes the low neuronal Cl- levels required for chloride influx after binding of GABA-A and glycine to their receptors, with subsequent hyperpolarization and neuronal inhibition (By similarity).
Involved in the regulation of dendritic spine formation and maturation (PubMed:24668262).
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