Enzymes
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- Name help_outline ethyl (R)-3-hydroxyhexanoate Identifier CHEBI:16641 Charge 0 Formula C8H16O3 InChIKeyhelp_outline LYRIITRHDCNUHV-SSDOTTSWSA-N SMILEShelp_outline CCC[C@@H](O)CC(=O)OCC 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 NADP+ Identifier CHEBI:58349 Charge -3 Formula C21H25N7O17P3 InChIKeyhelp_outline XJLXINKUBYWONI-NNYOXOHSSA-K SMILEShelp_outline NC(=O)c1ccc[n+](c1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](OP([O-])([O-])=O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,253 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline ethyl 3-oxohexanoate Identifier CHEBI:18119 (CAS: 3249-68-1) help_outline Charge 0 Formula C8H14O3 InChIKeyhelp_outline KQWWVLVLVYYYDT-UHFFFAOYSA-N SMILEShelp_outline CCCC(=O)CC(=O)OCC 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 H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NADPH Identifier CHEBI:57783 (Beilstein: 10411862) help_outline Charge -4 Formula C21H26N7O17P3 InChIKeyhelp_outline ACFIXJIJDZMPPO-NNYOXOHSSA-J SMILEShelp_outline NC(=O)C1=CN(C=CC1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](OP([O-])([O-])=O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,247 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:24352 | RHEA:24353 | RHEA:24354 | RHEA:24355 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Purification and characterization of two oxidoreductases involved in the enantioselective reduction of 3-oxo, 4-oxo and 5-oxo esters in baker's yeast.
Heidlas J., Engel K.H., Tressl R.
Two NADPH-dependent oxidoreductases catalyzing the enantioselective reduction of 3-oxo esters to (S)- and (R)-3-hydroxy acid esters, [hereafter called (S)- and (R)-enzymes] have been purified 121- and 332-fold, respectively, from cell extracts of Saccharomyces cerevisiae by means of streptomycin s ... >> More
Two NADPH-dependent oxidoreductases catalyzing the enantioselective reduction of 3-oxo esters to (S)- and (R)-3-hydroxy acid esters, [hereafter called (S)- and (R)-enzymes] have been purified 121- and 332-fold, respectively, from cell extracts of Saccharomyces cerevisiae by means of streptomycin sulfate treatment, Sephadex G-25 filtration, DEAE-Sepharose CL-6B chromatography, Sephadex G-150 filtration, Sepharose 6B filtration and hydroxyapatite chromatography. The relative molecular mass Mr, of the (S)-enzyme was estimated to be 48,000-50,000 on Sephadex G-150 column chromatography and 48,000 on sodium dodecyl sulfate/polyacrylamide gel electrophoresis. The enzyme was most active at pH 6.9 and reduced 3-oxo esters, 4-oxo and 5-oxo acids and esters enantioselectively to (S)-hydroxy compounds in the presence of NADPH. The Km values for ethyl 3-oxobutyrate, ethyl 3-oxohexanoate, 4-oxopentanoic and 5-oxohexanoic acid were determined as 0.9 mM, 5.3 mM, 17.1 mM and 13.1 mM, respectively. The Mr of the (R)-enzyme, estimated by means of column chromatography on Sepharose 6B, was 800,000. Under dissociating conditions of SDS/polyacrylamide gel electrophoresis the enzyme resolved into subunits of Mr 200,000 and 210,000, respectively. The enzyme is optimally active at pH 6.1, catalyzing specifically the reduction of 3-oxo esters to (R)-hydroxy esters, using NADPH for coenzyme. Km values for ethyl 3-oxobutyrate and ethyl 3-oxohexanoate were determined as 17.0 mM and 2.0 mM, respectively. Investigations with purified fatty acid synthase of baker's yeast revealed that the (R)-enzyme was identical with a subunit of this multifunctional complex; intact fatty acid synthase (Mr 2.4 X 10(6)) showed no activity in catalyzing the reduction of 3-oxo esters. << Less
Eur J Biochem 172:633-639(1988) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.