Negatively regulates long-term potentiation and modulates adult synaptic plasticity. Stabilizes the interaction of RTN4 isoform A/Nogo-A with its receptors, inhibiting clustering of postsynaptic AMPA receptors at synaptic sites. Upon neuronal stimulation, degraded at synapses, reducing RTN4 signaling and allowing AMPA receptor clustering at individual synapses.
Subcellular locations: Synapse, Synaptic cleft
Detected in both the presynaptic and postsynaptic regions of the synapse and is secreted from neurons into the synaptic cleft. May be released by neuronal dense core vesicles which mediate the release of cleaved neuropeptides.