Abcam, ab252889, Acid Sphingomyelinase Assay Kit (Colorimetric)

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Acid Sphingomyelinase Assay Kit (Colorimetric) ab252889 provides a simple and sensitive method for measuring ASMase enzymatic activity using colorimetry (OD 570 nm). Individual kit components also available for purchase with a minimum order of 20 units. Contact us to discuss your needs.
Key facts
Detection method:Colorimetric,
Sample types:Tissue, Suspension cells, Serum, Adherent cells,
Sensitivity:= 3 mU/mL,
Assay Platform:Microplate (12 x 8 well strips)

Product details:
Acid Sphingomyelinase Assay Kit (Colorimetric) ab252889 provides a simple and sensitive method for measuring ASMase enzymatic activity using colorimetry (OD 570 nm). In this assay, ASMase converts its substrate, sphingomyelin to phosphorylcholine and ceramide at pH 5.0; subsequently, phosphorylcholine is utilized in a series of reactions culminating in color formation from a highly specific probe. This high-throughput adaptable assay kit can detect ASMase activity as low as 3 mU/ml in a variety of samples.
Related Sphingomyelinase assay kits
Sphingomyelinase (SMase) is an enzyme that is responsible for cleaving sphingomyelin (SM) to phosphocholine and ceramide. Five types of sphingomyelinase (SMase) have been identified based on their cation dependence and pH optima of action. They are lysosomal acid SMase, secreted zinc-dependent acid SMase, magnesium-dependent neutral SMase, magnesium-independent neutral SMase, and alkaline SMase.
To measure neutral sphingomyelinase use
ab138876
To measure acid sphingomyelinase use this assay kit or the fluorometric assay
ab190554
Other notes
This product was previously called K192 Biovision Acid Sphingomyelinase Assay Kit II (Colorimetric). Biovision was acquired by Abcam in 2021.
The Safety Datasheet for this product has been updated for certain countries. Please check the current version in the Support and downloads section.

Properties and Storage Information:
Shipped at conditions-Dry Ice, Appropriate short-term storage conditions--20°C, Appropriate long-term storage conditions--20°C, Storage information--20°C

Supplementary Information:
This supplementary information is collated from multiple sources and compiled automatically.
Acid sphingomyelinase (ASMase) also known as sphingomyelin phosphodiesterase 1 or NP is an enzyme involved in sphingolipid metabolism. ASMase has a mass of approximately 75 kDa and appears in lysosomes where it converts sphingomyelin to ceramide and phosphorylcholine. This enzyme is important in maintaining cellular lipid balance and signaling. Expression of ASMase occurs in various tissues such as the liver spleen and brain.
Biological function summary
ASMase plays a role in membrane microdomain composition through its involvement in ceramide production. It participates in generating ceramide-enriched platforms that facilitate the clustering of signaling molecules. Ceramide acts as a second messenger in multiple cellular processes including apoptosis proliferation and inflammation. ASMase operates in the lysosomal lipid degradation pathway and connects with other lysosomal enzymes to modulate lipid turnovers such as glucosylceramidase affecting downstream cellular functions.
Pathways
Sphingolipid metabolism involves ASMase. This enzyme participates in the ceramide signaling pathway influencing apoptosis and stress responses. Related proteins in this pathway include casein kinase II which phosphorylates ASMase and cathepsin D involved in the lysosomal degradation process. ASMase activity alters ceramide levels impacting pro-apoptotic and pro-survival signals mediated by related proteins in the cell signaling network.
ASMase deficiency connects to Niemann-Pick disease types A and B characterized by lipid accumulation in lysosomes. Mutations in the ASMase gene lead to impaired enzyme function resulting in excessive sphingomyelin storage and cell damage. The disorder links ASMase to proteins such as hexa-beta-N-acetylglucosaminidase which is affected in other lysosomal storage disorders. Research shows that ASMase activity also influences cardiovascular diseases by regulating ceramide and cholesterol levels in atherosclerotic lesions connecting it to inflammatory pathways involving adhesion molecules and cytokines.