2d8c

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Solution structure of the sam-domain of mouse phosphatidyl ceramidecholinephosphotransferase 1Solution structure of the sam-domain of mouse phosphatidyl ceramidecholinephosphotransferase 1

Structural highlights

2d8c is a 1 chain structure with sequence from Mus musculus. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Solution NMR
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN

Function

SMS1_MOUSE Sphingomyelin synthases synthesize the sphingolipid, sphingomyelin, through transfer of the phosphatidyl head group, phosphatidylcholine, on to the primary hydroxyl of ceramide. The reaction is bidirectional depending on the respective levels of the sphingolipid and ceramide. Golgi apparatus SMS1 directly and specifically recognizes the choline head group on the substrate, requiring two fatty chains on the choline-P donor molecule in order to be recognized efficiently as a substrate. Major form in macrophages. Required for cell growth in certain cell types (By similarity). Suppresses BAX-mediated apoptosis and also prevents cell death in response to stimuli such as hydrogen peroxide, osmotic stress, elevated temperature and exogenously supplied sphingolipids. May protect against cell death by reversing the stress-inducible increase in levels of proapoptotic ceramide.[1] [2]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

References

  1. Yang Z, Khoury C, Jean-Baptiste G, Greenwood MT. Identification of mouse sphingomyelin synthase 1 as a suppressor of Bax-mediated cell death in yeast. FEMS Yeast Res. 2006 Aug;6(5):751-62. PMID:16879426 doi:http://dx.doi.org/10.1111/j.1567-1364.2006.00052.x
  2. Li Z, Fan Y, Liu J, Li Y, Huan C, Bui HH, Kuo MS, Park TS, Cao G, Jiang XC. Impact of sphingomyelin synthase 1 deficiency on sphingolipid metabolism and atherosclerosis in mice. Arterioscler Thromb Vasc Biol. 2012 Jul;32(7):1577-84. doi:, 10.1161/ATVBAHA.112.251538. Epub 2012 May 10. PMID:22580896 doi:http://dx.doi.org/10.1161/ATVBAHA.112.251538
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