Enzymes
| UniProtKB help_outline | 612 proteins |
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- Name help_outline a neolactoside IV3-α-GalNAc,IV2-α-Fuc-nLc4Cer(d18:0) Identifier CHEBI:91118 Charge 0 Formula C59H104N3O32R SMILEShelp_outline CCCCCCCCCCCCCCC[C@@H](O)[C@H](CO[C@@H]1O[C@H](CO)[C@@H](O[C@@H]2O[C@H](CO)[C@H](O)[C@H](O[C@@H]3O[C@H](CO)[C@@H](O[C@@H]4O[C@H](CO)[C@H](O)[C@H](O[C@H]5O[C@H](CO)[C@H](O)[C@H](O)[C@H]5NC(C)=O)[C@H]4O[C@@H]4O[C@@H](C)[C@@H](O)[C@@H](O)[C@@H]4O)[C@H](O)[C@H]3NC(C)=O)[C@H]2O)[C@H](O)[C@H]1O)NC([*])=O 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- 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 6,048 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline a neolactoside IV2-α-Fuc-nLc4Cer(d18:0) Identifier CHEBI:91119 Charge 0 Formula C51H91N2O27R SMILEShelp_outline O([C@H]1[C@@H]([C@@H](NC(C)=O)[C@H](O[C@@H]2[C@H]([C@H](O[C@H]3[C@@H]([C@H]([C@H](OC[C@@H]([C@@H](CCCCCCCCCCCCCCC)O)NC(*)=O)O[C@@H]3CO)O)O)O[C@@H]([C@@H]2O)CO)O)O[C@@H]1CO)O)[C@H]4[C@@H]([C@H]([C@H]([C@H](O4)CO)O)O)O[C@@H]5O[C@H]([C@H]([C@H]([C@@H]5O)O)O)C 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline N-acetyl-α-D-galactosamine Identifier CHEBI:40356 (CAS: 14215-68-0) help_outline Charge 0 Formula C8H15NO6 InChIKeyhelp_outline OVRNDRQMDRJTHS-CBQIKETKSA-N SMILEShelp_outline CC(=O)N[C@H]1[C@@H](O)O[C@H](CO)[C@H](O)[C@@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 4 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:49304 | RHEA:49305 | RHEA:49306 | RHEA:49307 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Defects in degradation of blood group A and B glycosphingolipids in Schindler and Fabry diseases.
Asfaw B., Ledvinova J., Dobrovolny R., Bakker H.D., Desnick R.J., van Diggelen O.P., de Jong J.G., Kanzaki T., Chabas A., Maire I., Conzelmann E., Schindler D.
Skin fibroblast cultures from patients with inherited lysosomal enzymopathies, alpha-N-acetylgalactosaminidase (alpha-NAGA) and alpha-galactosidase A deficiencies (Schindler and Fabry disease, respectively), and from normal controls were used to study in situ degradation of blood group A and B gly ... >> More
Skin fibroblast cultures from patients with inherited lysosomal enzymopathies, alpha-N-acetylgalactosaminidase (alpha-NAGA) and alpha-galactosidase A deficiencies (Schindler and Fabry disease, respectively), and from normal controls were used to study in situ degradation of blood group A and B glycosphingolipids. Glycosphingolipids A-6-2 (GalNAc (alpha 1-->3)[Fuc alpha 1-->2]Gal(beta1-->4)GlcNAc(beta 1-->3)Gal(beta 1--> 4)Glc (beta 1-->1')Cer, IV(2)-alpha-fucosyl-IV(3)-alpha-N-acetylgalactosaminylneolactotetraosylceramide), B-6-2 (Gal(alpha 1-->3)[Fuc alpha 1--> 2] Gal (beta 1-->4)GlcNAc(beta 1-->3)Gal(beta 1-->4)Glc(beta 1-->1')Cer, IV(2)-alpha-fucosyl-IV(3)-alpha-galactosylneolactotetraosylceramide), and globoside (GalNAc(beta 1-->3)Gal(alpha 1-->4)Gal(beta 1-->4)Glc(beta 1-->1') Cer, globotetraosylceramide) were tritium labeled in their ceramide moiety and used as natural substrates. The degradation rate of glycolipid A-6-2 was very low in fibroblasts of all the alpha-NAGA-deficient patients (less than 7% of controls), despite very heterogeneous clinical pictures, ruling out different residual enzyme activities as an explanation for the clinical heterogeneity. Strongly elevated urinary excretion of blood group A glycolipids was detected in one patient with blood group A, secretor status (five times higher than upper limit of controls), in support of the notion that blood group A-active glycolipids may contribute as storage compounds in blood group A patients. When glycolipid B-6-2 was fed to alpha-galactosidase A-deficient cells, the degradation rate was surprisingly high (50% of controls), while that of globotriaosylceramide was reduced to less than 15% of control average, presumably reflecting differences in the lysosomal enzymology of polar glycolipids versus less-polar ones. Relatively high-degree degradation of substrates with alpha-D-Galactosyl moieties hints at a possible contribution of other enzymes. << Less
J Lipid Res 43:1096-1104(2002) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Degradation of blood group A glycolipid A-6-2 by normal and mutant human skin fibroblasts.
Asfaw B., Schindler D., Ledvinova J., Cerny B., Smid F., Conzelmann E.
The degradation of blood group glycolipid A-6-2 (GalNAc(alpha1-->3)[Fuc alpha1-->2]Gal(beta1-->4)GlcNAc(beta1-->3)Gal(beta1-->4)Glc(beta1-->1')C er, IV2-alpha-fucosyl-IV3-alpha-N-acetylgalactosaminylneolact otetraosylceramide), tritium-labeled in its ceramide moiety, was studied in situ, in skin f ... >> More
The degradation of blood group glycolipid A-6-2 (GalNAc(alpha1-->3)[Fuc alpha1-->2]Gal(beta1-->4)GlcNAc(beta1-->3)Gal(beta1-->4)Glc(beta1-->1')C er, IV2-alpha-fucosyl-IV3-alpha-N-acetylgalactosaminylneolact otetraosylceramide), tritium-labeled in its ceramide moiety, was studied in situ, in skin fibroblast cultures from normal controls, from patients with defects of lysosomal alpha-N-acetylgalactosaminidase, and from patients with other lysosomal storage diseases. Uptake of the glycolipid with apolipoprotein E-coated liposomes was linear with time and with the amount of glycolipid added. In normal cells, the expected array of less polar products and some lipids resulting from re-using the liberated sphingosine, mainly sphingomyelin and phosphatidylcholine, were formed. In alpha-N-acetylgalactosaminidase-deficient cells, the glycolipid was virtually not degraded; product formation was less than 2% of the normal control rate, suggesting that blood group A-active glycolipids contribute as storage compounds to the pathogenesis of this disease. The expected accumulation of degradation intermediates was seen in fucosidosis, and in Sandhoff, Gaucher, and Farber disease cells, whereas normal turnover rates were found in Tay-Sachs disease cells, G(M2) activator-deficient (variant AB of G(M2) gangliosidosis) and in sulfatide activator-(sap-B-) deficient cells. In G(M1) gangliosidosis and in sap precursor-deficient cells, the lysosomal glycolipid catabolism was found to be strongly retarded; accumulation of individual products could not be seen. Skin fibroblasts from patients with alpha-N-acetylgalactosaminidase deficiency (Schindler disease) cannot degrade the major blood group A glycolipid. << Less
J. Lipid Res. 39:1768-1780(1998) [PubMed] [EuropePMC]
This publication is cited by 4 other entries.