Enzymes
| UniProtKB help_outline | 2 proteins |
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- 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 82 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline O2 Identifier CHEBI:15379 (CAS: 7782-44-7) help_outline Charge 0 Formula O2 InChIKeyhelp_outline MYMOFIZGZYHOMD-UHFFFAOYSA-N SMILEShelp_outline O=O 2D coordinates Mol file for the small molecule Search links Involved in 2,648 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 5-hydroperoxy-(6E,8Z,11Z,14Z)-eicosatetraenoate Identifier CHEBI:90822 Charge -1 Formula C20H31O4 InChIKeyhelp_outline JNUUNUQHXIOFDA-XTDASVJISA-M SMILEShelp_outline C(CC/C=C\C/C=C\C/C=C\C=C\C(CCCC(=O)[O-])OO)CC 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
Cross-references
| RHEA:48844 | RHEA:48845 | RHEA:48846 | RHEA:48847 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
| UniProtKB help_outline |
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Publications
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Differential characteristics of human 15-lipoxygenase isozymes and a novel splice variant of 15S-lipoxygenase.
Kilty I., Logan A., Vickers P.J.
The lipoxygenases (LOs) are a family of nonheme iron dioxygenases that catalyse the insertion of molecular oxygen into polyunsaturated fatty acids. Five members of this gene family have been described in man, 5-LO, 12S-LO, 12R-LO, 15-LO and 15S-LO. Using partially purified recombinant 15S-LO enzym ... >> More
The lipoxygenases (LOs) are a family of nonheme iron dioxygenases that catalyse the insertion of molecular oxygen into polyunsaturated fatty acids. Five members of this gene family have been described in man, 5-LO, 12S-LO, 12R-LO, 15-LO and 15S-LO. Using partially purified recombinant 15S-LO enzyme and cells constitutively expressing this protein, we have compared the activity, substrate specificity, kinetic characteristics and regulation of this enzyme to that previously reported for 15-LO. 15S-LO has a threefold higher Km, similar Vmax and increased specificity of oxygenation for arachidonic acid, and a similar Km but decreased Vmax for linoleic acid in comparison to 15-LO. Unlike 15-LO, 15S-LO is not suicide inactivated by the products of fatty acid oxygenation. However, in common with other LOs, 15S-LO activity is regulated through calcium-dependent association of the enzyme with the membrane fraction of cells. In addition, whilst independently cloning the recently described 15S-LO, we identified a splice variant containing an in-frame 87-bp deletion corresponding to amino acids 401-429 inclusive. Modelling of the 15S-LO and subsequent studies with partially purified recombinant protein suggest that the deleted region comprises a complete alpha-helix flanking the active site of the enzyme resulting in decreased specificity of oxygenation and affinity for fatty acid substrates. Alternative splicing of 15S-LO would therefore provide a further level of regulation of fatty acid metabolism. These results demonstrate that there are substantial differences in the enzyme characteristics and regulation of the 15-LO isozymes which may reflect differing roles for the proteins in vivo. << Less
Eur. J. Biochem. 266:83-93(1999) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.