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synaptotagmin-like mitochondrial-lipid-binding protein (SMP) domain found in C2 domain-containing protein 2-like (C2CD2L) C2CD2L, also called phospholipid transfer protein C2CD2L, or C2CD2-like, or transmembrane protein 24 (TMEM24), is a lipid-binding protein that transports phosphatidylinositol, the precursor of phosphatidylinositol 4,5-bisphosphate (PI(4,5)P2), from its site of synthesis in the endoplasmic reticulum to the cell membrane. It is a Ca2+-regulated component of endoplasmic reticulum (ER)-plasma membrane contacts in mammalian neurons. This model corresponds to the SMP domain of C2CD2L, which may be implicated in lipid transport.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",