Enzymes
| UniProtKB help_outline | 8 proteins |
Reaction participants Show >> << Hide
- Name help_outline H2O Identifier CHEBI:15377 (Beilstein: 3587155; CAS: 7732-18-5) help_outline Charge 0 Formula H2O InChIKeyhelp_outline XLYOFNOQVPJJNP-UHFFFAOYSA-N SMILEShelp_outline [H]O[H] 2D coordinates Mol file for the small molecule Search links Involved in 6,204 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline N-(acetyl)-sphing-4-enine Identifier CHEBI:46979 (CAS: 3102-57-6) help_outline Charge 0 Formula C20H39NO3 InChIKeyhelp_outline BLTCBVOJNNKFKC-QUDYQQOWSA-N SMILEShelp_outline CCCCCCCCCCCCC\C=C\[C@@H](O)[C@H](CO)NC(C)=O 2D coordinates Mol file for the small molecule Search links Involved in 42 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline acetate Identifier CHEBI:30089 (Beilstein: 1901470; CAS: 71-50-1) help_outline Charge -1 Formula C2H3O2 InChIKeyhelp_outline QTBSBXVTEAMEQO-UHFFFAOYSA-M SMILEShelp_outline CC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 174 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline sphing-4-enine Identifier CHEBI:57756 Charge 1 Formula C18H38NO2 InChIKeyhelp_outline WWUZIQQURGPMPG-KRWOKUGFSA-O SMILEShelp_outline CCCCCCCCCCCCC\C=C\[C@@H](O)[C@@H]([NH3+])CO 2D coordinates Mol file for the small molecule Search links Involved in 34 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:58484 | RHEA:58485 | RHEA:58486 | RHEA:58487 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Related reactions help_outline
More general form(s) of this reaction
Publications
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Purification, characterization, and biosynthesis of human acid ceramidase.
Bernardo K., Hurwitz R., Zenk T., Desnick R.J., Ferlinz K., Schuchman E.H., Sandhoff K.
Acid ceramidase (N-acylsphingosine deacylase, EC 3.5.1.23) is the lysosomal enzyme catalyzing the hydrolysis of ceramide to sphingosine and free fatty acid. Its inherited deficiency causes ceramide accumulation in Farber's disease. The enzyme was purified to apparent homogeneity from human urine b ... >> More
Acid ceramidase (N-acylsphingosine deacylase, EC 3.5.1.23) is the lysosomal enzyme catalyzing the hydrolysis of ceramide to sphingosine and free fatty acid. Its inherited deficiency causes ceramide accumulation in Farber's disease. The enzyme was purified to apparent homogeneity from human urine by sequential chromatography on octyl-Sepharose, concanavalin A-Sepharose, blue-Sepharose, and DEAE-cellulose. The final preparation, which was enriched approximately 4450-fold over the starting material, resulted in a polypeptide of approximately 50 kDa and could be reduced into two subunits of approximately 13 (alpha) and approximately 40 (beta) kDa. Treatment of the purified enzyme with endoglycosidase H or peptido-N-glycanase F reduced the molecular mass of the beta subunit to approximately 30-35 and approximately 27 kDa, respectively. In contrast, the molecular mass of the alpha subunit was unchanged. The purified enzyme had an apparent Km of 149 microM and a Vmax of 136 nmol/mg/h using N-lauroylsphingosine as substrate. Polyclonal antibodies were raised against the purified urinary enzyme and used to investigate the biosynthesis of acid ceramidase. Immunoprecipitation studies on metabolically labeled skin fibroblasts indicated that both subunits arose from a single precursor of approximately 55 kDa. A minor portion of newly synthesized acid ceramidase was secreted into the medium as a monomeric 47-kDa protein, indicating that generation of the mature heterodimeric enzyme occurred in endosomal and/or lysosomal compartments. << Less
J. Biol. Chem. 270:11098-11102(1995) [PubMed] [EuropePMC]
This publication is cited by 5 other entries.