Enzymes
| UniProtKB help_outline | 2 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-(5Z,8Z,11Z,14Z-eicosatetraenoyl)-(4R)-hydroxysphinganine Identifier CHEBI:85207 Charge 0 Formula C38H69NO4 InChIKeyhelp_outline MYFWOINCQDEQRM-RGSGCEEESA-N SMILEShelp_outline CCCCCCCCCCCCCC[C@@H](O)[C@@H](O)[C@H](CO)NC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC 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 (4R)-hydroxysphinganine Identifier CHEBI:64124 Charge 1 Formula C18H40NO3 InChIKeyhelp_outline AERBNCYCJBRYDG-KSZLIROESA-O SMILEShelp_outline CCCCCCCCCCCCCC[C@@H](O)[C@@H](O)[C@@H]([NH3+])CO 2D coordinates Mol file for the small molecule Search links Involved in 22 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (5Z,8Z,11Z,14Z)-eicosatetraenoate Identifier CHEBI:32395 (Beilstein: 5439048) help_outline Charge -1 Formula C20H31O2 InChIKeyhelp_outline YZXBAPSDXZZRGB-DOFZRALJSA-M SMILEShelp_outline CCCCC\C=C/C\C=C/C\C=C/C\C=C/CCCC([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 83 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:45380 | RHEA:45381 | RHEA:45382 | RHEA:45383 | |
|---|---|---|---|---|
| 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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Alkaline ceramidase 3 (ACER3) hydrolyzes unsaturated long-chain ceramides, and its down-regulation inhibits both cell proliferation and apoptosis.
Hu W., Xu R., Sun W., Szulc Z.M., Bielawski J., Obeid L.M., Mao C.
Ceramides with different fatty acyl chains may vary in their physiological or pathological roles; however, it remains unclear how cellular levels of individual ceramide species are regulated. Here, we demonstrate that our previously cloned human alkaline ceramidase 3 (ACER3) specifically controls ... >> More
Ceramides with different fatty acyl chains may vary in their physiological or pathological roles; however, it remains unclear how cellular levels of individual ceramide species are regulated. Here, we demonstrate that our previously cloned human alkaline ceramidase 3 (ACER3) specifically controls the hydrolysis of ceramides carrying unsaturated long acyl chains, unsaturated long-chain (ULC) ceramides. In vitro, ACER3 only hydrolyzed C(18:1)-, C(20:1)-, C(20:4)-ceramides, dihydroceramides, and phytoceramides. In cells, ACER3 overexpression decreased C(18:1)- and C(20:1)-ceramides and dihydroceramides, whereas ACER3 knockdown by RNA interference had the opposite effect, suggesting that ACER3 controls the catabolism of ULC ceramides and dihydroceramides. ACER3 knockdown inhibited cell proliferation and up-regulated the cyclin-dependent kinase inhibitor p21(CIP1/WAF1). Blocking p21(CIP1/WAF1) up-regulation attenuated the inhibitory effect of ACER3 knockdown on cell proliferation, suggesting that ACER3 knockdown inhibits cell proliferation because of p21(CIP1/WAF1) up-regulation. ACER3 knockdown inhibited cell apoptosis in response to serum deprivation. ACER3 knockdown up-regulated the expression of the alkaline ceramidase 2 (ACER2), and the ACER2 up-regulation decreased non-ULC ceramide species while increasing both sphingosine and its phosphate. Collectively, these data suggest that ACER3 catalyzes the hydrolysis of ULC ceramides and dihydroceramides and that ACER3 coordinates with ACER2 to regulate cell proliferation and survival. << Less
J. Biol. Chem. 285:7964-7976(2010) [PubMed] [EuropePMC]
This publication is cited by 8 other entries.