Function
Sphingolipids are a class of lipids, containing a sphingosine base moiety, essential for eukaryotic cell membrane structure and function. [1] Importantly, sphingolipids can additionally act as critical signaling molecules used in many eukaryotic homeostatic cellular processes, such as inflammation, proliferation, apoptosis, cell migration, and pathogen defense. [1] Thus, it is critical for sphingolipids and their metabolizing enzymes to exist in a delicate homeostatic balance within the eukaryotic cell system.
Sphingosine-1-Phosphate (S1P), a lipid within the sphingolipid class, is an important signaling molecule that can participate in intracellular and extracellular signaling. [1] [2] S1P is critical not only to intracellular eukaryotic cell survival and function but is pivotal to eliciting the immune response, particularly as a mechanism to pathogen defense. [2] Sphingosine Kinase, existing in two isoenzyme forms, SphK1 and SphK2, creates S1P via the phosphorylation of sphingosine, the base moiety of all sphingolipids. [2]
Relevance
Structural highlights
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