Enzymes
| UniProtKB help_outline | 3 proteins |
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- Name help_outline β-D-glucosyl-(1↔1)-sphing-4-enine Identifier CHEBI:83992 Charge 1 Formula C24H48NO7 InChIKeyhelp_outline HHJTWTPUPVQKNA-JIAPQYILSA-O SMILEShelp_outline CCCCCCCCCCCCC\C=C\[C@@H](O)[C@@H]([NH3+])CO[C@@H]1O[C@H](CO)[C@@H](O)[C@H](O)[C@H]1O 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 H2O Identifier CHEBI:15377 (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 6,337 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
- Name help_outline D-glucose Identifier CHEBI:4167 (CAS: 2280-44-6) help_outline Charge 0 Formula C6H12O6 InChIKeyhelp_outline WQZGKKKJIJFFOK-GASJEMHNSA-N SMILEShelp_outline OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 162 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:59288 | RHEA:59289 | RHEA:59290 | RHEA:59291 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Klotho-related protein is a novel cytosolic neutral beta-glycosylceramidase.
Hayashi Y., Okino N., Kakuta Y., Shikanai T., Tani M., Narimatsu H., Ito M.
Using C6-NBD-glucosylceramide (GlcCer) as a substrate, we detected the activity of a conduritol B epoxide-insensitive neutral glycosylceramidase in cytosolic fractions of zebrafish embryos, mouse and rat brains, and human fibroblasts. The candidates for the enzyme were assigned to the Klotho (KL), ... >> More
Using C6-NBD-glucosylceramide (GlcCer) as a substrate, we detected the activity of a conduritol B epoxide-insensitive neutral glycosylceramidase in cytosolic fractions of zebrafish embryos, mouse and rat brains, and human fibroblasts. The candidates for the enzyme were assigned to the Klotho (KL), whose family members share a beta-glucosidase-like domain but whose natural substrates are unknown. Among this family, only the KL-related protein (KLrP) is capable of degrading C6-NBD-GlcCer when expressed in CHOP cells, in which Myc-tagged KLrP was exclusively distributed in the cytosol. In addition, knockdown of the endogenous KLrP by small interfering RNA increased the cellular level of GlcCer. The purified recombinant KLrP hydrolyzed 4-methylumbelliferyl-glucose, C6-NBD-GlcCer, and authentic GlcCer at pH 6.0. The enzyme also hydrolyzed the corresponding galactosyl derivatives, but each k(cat)/Km was much lower than that for glucosyl derivatives. The x-ray structure of KLrP at 1.6A resolution revealed that KLrP is a (beta/alpha)8 TIM barrel, in which Glu(165) and Glu(373) at the carboxyl termini of beta-strands 4 and 7 could function as an acid/base catalyst and nucleophile, respectively. The substrate-binding cleft of the enzyme was occupied with palmitic acid and oleic acid when the recombinant protein was crystallized in a complex with glucose. GlcCer was found to fit well the cleft of the crystal structure of KLrP. Collectively, KLrP was identified as a cytosolic neutral glycosylceramidase that could be involved in a novel nonlysosomal catabolic pathway of GlcCer. << Less
J. Biol. Chem. 282:30889-30900(2007) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.