E3 ubiquitin-protein ligase TRIM9 (Trim9)

E3 ubiquitin-protein ligase which ubiquitinates itself in cooperation with an E2 enzyme UBE2D2/UBC4 and functions as a targeting signal for proteasomal degradation. May play a role in regulation of neuronal functions.

May act as a regulator of synaptic vesicle exocytosis by controlling the availability of SNAP25 for the SNARE complex formation. .