Function
The protein encoded by this gene is a member of the tripartite motif (TRIM) family. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. The protein localizes to microtubular structures in the cytoplasm. Its function has not been identified. Alternate splicing of this gene results in two transcript variants encoding different isoforms. [6]
Recent reports indicate the involvement of MID2 in cytokinesis [7] [8] .MID2 (TRIM1) ubiquitinates Sperm-associated antigen 5 (Astrin) on K409, further promoting its degradation and proper cytokinesis. [8] In contrary, depletion of MID2 (TRIM1) stabilizes Sperm-associated antigen 5 (Astrin) whose inappropriate accumulation at the midbody triggers cytokinetic arrest, multinucleated cells, and cell death. [7] [8]
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