Activity-regulated cytoskeleton associated protein 1

UniProtKB accession:  Q7K1U0

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UniProtKB description:  Master regulator of synaptic plasticity that self-assembles into virion-like capsids that encapsulate RNAs and mediate intercellular RNA transfer from motorneurons to muscles (PubMed:29328915). Arc1 protein is released from motorneurons in extracellular vesicles that mediate the transfer of Arc1 mRNA into muscle cells, where Arc1 mRNA can undergo activity-dependent translation (PubMed:29328915). Intercellular transfer od Arc1 mRNA is required for synaptic plasticity at the neuromuscular junction (PubMed:29328915). May play a role in energy balance: required for regulation of body fat by a specific population of brain neurons, named E347, that are necessary and sufficient for proper body fat storage (PubMed:26209258).