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Literature summary for 3.1.4.12 extracted from

  • Sakuragawa, N.
    Acid sphingomyelinase of human placenta: purification, properties, and 125iodine labeling (1982), J. Biochem., 92, 637-646.
    View publication on PubMed

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.526
-
sphingomyelin
-
Homo sapiens

Localization

Localization Comment Organism GeneOntology No. Textmining
lysosome
-
Homo sapiens 5764
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
39800
-
1 * 70500 + 1 * 39800, SDS-PAGE Homo sapiens
70500
-
1 * 70500 + 1 * 39800, SDS-PAGE Homo sapiens
200000
-
gel filtration Homo sapiens

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
sphingomyelin + H2O Homo sapiens
-
?
-
?

Organism

Organism UniProt Comment Textmining
Homo sapiens
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Homo sapiens

Source Tissue

Source Tissue Comment Organism Textmining
placenta
-
Homo sapiens
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
different assay conditions, substrates etc. Homo sapiens

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
bis-p-nitrophenyl phosphate + H2O poor substrate Homo sapiens ?
-
?
sphingomyelin + H2O
-
Homo sapiens N-acylsphingosine + choline phosphate
-
?
sphingomyelin + H2O
-
Homo sapiens ?
-
?

Subunits

Subunits Comment Organism
dimer 1 * 70500 + 1 * 39800, SDS-PAGE Homo sapiens

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5
-
-
Homo sapiens