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SAM domain of sphingomyelin synthase SAM (sterile alpha motif) domain of SGMS-1 (sphingomyelin synthase) subfamily is a potential protein-protein interaction domain. Sphingomyelin synthase 1 is a transmembrane protein with a SAM domain at the N-terminus and a catalytic domain at the C-terminus. Sphingomyelin synthase 1 is a Golgi-associated enzyme, and depending on the concentration of diacylglycerol and ceramide, can catalyze synthesis phosphocholine or sphingomyelin, respectively. It plays a central role in sphingolipid and glycerophospholipid metabolism.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",