Significance Synapses form and change in response to neuronal activity, and they dynamically exchange transmembrane proteins over time. Most synaptic proteins are synthesized in the cell body and undergo long-distance vesicular transport powered by molecular motors along microtubules. Here we show that two synaptic key proteins (GluA2 and N-cadherin) are simultaneously delivered within distinct transport vesicles through motor proteins. Our data suggest that multidomain cargo adaptors tether synaptic proteins destined for the same subcellular compartment. We propose that vesicular presorting is an alternative mechanism to efficiently supply synapses.

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