Transmembrane protein 64 (Tmem64)

Positively regulates TNFSF11-induced osteoclast differentiation. Acts as a regulator of TNFSF11-mediated Ca(2+) signaling pathways through its interaction with SERCA2 that's critical for the TNFSF11-induced CREB1 activation and mitochondrial ROS production necessary for proper osteoclast generation.

Association between TMEM64 and SERCA2 in the ER contributes to cytosolic Ca (2+) spiking for activation of NFATC1 and generation of mitochondrial ROS, thereby triggering Ca (2+) signaling cascades that promote osteoclast differentiation and activation (PubMed:23395171). Negatively regulates osteoblast differentiation and positively regulates adipocyte differentiation via modulation of the canonical Wnt signaling pathway.