Synapsins are a family of neuronal proteins that are most renowned for their activity in modulating the pre-synaptic terminal. Synapsin’s behavior is regulated by protein kinases and phosphatases, which alter the way that synapsin’s interact with actin filaments and other nearby proteins. There are three isoforms of Synapsin – Synapsin I, II and III. Synapsin I specifically localizes to the membrane of presynaptic vesicles and plays a role in regulation of axonogenesis and synaptogenesis.
