Sphingomyelin phosphodiesterase D
| Sphingomyelin phosphodiesterase D | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 3.1.4.41 | ||||||||
| CAS no. | 54992-31-3 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
Sphingomyelin phosphodiesterase D (EC 3.1.4.41, sphingomyelinase D) is an enzyme of the sphingomyelin phosphodiesterase family with systematic name sphingomyelin ceramide-phosphohydrolase.[2][3] These enzymes catalyse the hydrolysis of sphingomyelin, resulting in the formation of ceramide 1-phosphate and choline:
- sphingomyelin + H2O ceramide 1-phosphate + choline
or the hydrolysis of 2-lysophosphatidylcholine to give choline and 2-lysophosphatidate. Sphingomyelin phosphodiesterase D activity is shared by enzymes with a wider substrate range, classified as phospholipases D or lipophosphodiesterase II EC 3.1.4.4.[4] Sphingomyelinases D are produced by some spiders in their venoms, specifically the brown recluse (Loxosceles reclusa),[5] by arthropods such as ticks, or pathogenic bacteria and fungi. Pathogenicity is expressed through different mechanisms, such as membrane destabilization, cell penetration, inflammation of the lungs and cutaneous lesions, common following brown recluse spider bites.
See also
[edit | edit source]References
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External links
[edit | edit source]- Sphingomyelin+phosphodiesterase+D at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
- http://www.arachnoserver.org/toxincard.html?id=138
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