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Unlike the proliferative action of SPHK1, SPHK2 has been shown to possess anti-proliferative or pro-apoptotic action. SphK2 suppresses growth and enhances apoptosis, independent of activation of S1P receptors. Sequence analysis revealed that SphK2 contains a 9 amino acid motif similar to that present in Bcl2-homology domain 3 (BH3)- only proteins, a pro-apoptotic subgroup of the Bcl-2 family. Co-immunoprecipitation demonstrated that SphK2 interacted with Bcl-xL; however, mutation of the conserved leucine residue present in all BH3 domains only partially reduced apoptosis induced by SphK2, suggesting that the SphK2 protein possesses additional determinants important for this function.
Gene Name: | sphingosine kinase 2 |
Family/Subfamily: | Non-protein Kinase , Sphingosine |
Synonyms: | SPHK2, SK-2, Sk2, Sphingosine kinase type 2, SPK-2, Sphingosine kinase 2, SPHK2L, SK 2, SPK 2 |
Target Sequences: | NM_020126 NP_064511.2 Q9NRA0 |
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