Enzymes
| UniProtKB help_outline | 3 proteins |
| Enzyme class help_outline |
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Reaction participants Show >> << Hide
- Name help_outline 13-deoxydaunorubicin Identifier CHEBI:75297 Charge 1 Formula C27H32NO9 InChIKeyhelp_outline XAMIMZAWZUSOPA-JIGXQNLBSA-O SMILEShelp_outline CC[C@@]1(O)C[C@H](O[C@H]2C[C@H]([NH3+])[C@H](O)[C@H](C)O2)c2c(O)c3C(=O)c4c(OC)cccc4C(=O)c3c(O)c2C1 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 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 1,310 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 2,779 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 9,717 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 13-dihydrodaunorubicin Identifier CHEBI:75296 Charge 1 Formula C27H32NO10 InChIKeyhelp_outline HJEZFVLKJYFNQW-FKKRWUELSA-O SMILEShelp_outline COc1cccc2C(=O)c3c(O)c4C[C@](O)(C[C@H](O[C@H]5C[C@H]([NH3+])[C@H](O)[C@H](C)O5)c4c(O)c3C(=O)c12)C(C)O 2D coordinates Mol file for the small molecule Search links Involved in 3 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 1,316 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
Cross-references
| RHEA:37851 | RHEA:37852 | RHEA:37853 | RHEA:37854 | |
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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, properties, and characterization of recombinant Streptomyces sp. strain C5 DoxA, a cytochrome P-450 catalyzing multiple steps in doxorubicin biosynthesis.
Walczak R.J., Dickens M.L., Priestley N.D., Strohl W.R.
DoxA is a cytochrome P-450 monooxygenase involved in the late stages of daunorubicin and doxorubicin biosynthesis that has a broad substrate specificity for anthracycline glycone substrates. Recombinant DoxA was purified to homogeneity from Streptomyces lividans transformed with a plasmid containi ... >> More
DoxA is a cytochrome P-450 monooxygenase involved in the late stages of daunorubicin and doxorubicin biosynthesis that has a broad substrate specificity for anthracycline glycone substrates. Recombinant DoxA was purified to homogeneity from Streptomyces lividans transformed with a plasmid containing the Streptomyces sp. strain C5 doxA gene under the control of the strong SnpR-activated snpA promoter. The purified enzyme was a monomeric, soluble protein with an apparent Mr of 47,000. Purified DoxA catalyzed the 13-hydroxylation of 13-deoxydaunorubicin, the 13-oxidation of 13-dihydrocarminomycin and 13-dihydrodaunorubicin, and the 14-hydroxylation of daunorubicin. The pH optimum for heme activation was pH 7.5, and the temperature optimum was 30 degreesC. The kcat/Km values for the oxidation of anthracycline substrates by purified DoxA, incubated with appropriate electron-donating components, were as follows: for 13-deoxydaunorubicin, 22,000 M-1 x s-1; for 13-dihydrodaunorubicin, 14,000 M-1 x s-1; for 13-dihydrocarminomycin, 280 M-1 x s-1; and for daunorubicin, 130 M-1 x s-1. Our results indicate that the conversion of daunorubicin to doxorubicin by this enzyme is not a favored reaction and that the main anthracycline flux through the late steps of the daunorubicin biosynthetic pathway catalyzed by DoxA is likely directed through the 4-O-methyl series of anthracyclines. << Less
J. Bacteriol. 181:298-304(1999) [PubMed] [EuropePMC]
This publication is cited by 4 other entries.
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Bioconversion of the anthracycline analogue desacetyladriamycin by recombinant DoxA, a P450-monooxygenase from Streptomyces sp. strain C5.
Walczak R.J., Hines J.V., Strohl W.R., Priestley N.D.
[reaction: see text] A recombinant P450-monooxygenase, DoxA, obtained from Streptomyces sp. strain C5, the producer of the anticancer compound daunorubicin, was expressed in S. lividans TK24 and therein used to catalyze the conversion of the anthracycline analogue desacetyladriamycin into the new ... >> More
[reaction: see text] A recombinant P450-monooxygenase, DoxA, obtained from Streptomyces sp. strain C5, the producer of the anticancer compound daunorubicin, was expressed in S. lividans TK24 and therein used to catalyze the conversion of the anthracycline analogue desacetyladriamycin into the new anthracycline, 10-hydroxydesacetyladriamycin. This work establishes a new function for DoxA and demonstrates the use of a recombinant enzyme to prepare a new anthracycline analogue. << Less
Org. Lett. 3:2277-2279(2001) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.
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In vivo and in vitro bioconversion of epsilon-rhodomycinone glycoside to doxorubicin: functions of DauP, DauK, and DoxA.
Dickens M.L., Priestley N.D., Strohl W.R.
We recently determined the function of the gene product of Streptomyces sp. strain C5 doxA, a cytochrome P-450-like protein, to be daunorubicin C-14 hydroxylase (M. L. Dickens and W. R. Strohl, J. Bacteriol. 178: 3389-3395, 1996). In the present study, we show that DoxA also catalyzes the hydroxyl ... >> More
We recently determined the function of the gene product of Streptomyces sp. strain C5 doxA, a cytochrome P-450-like protein, to be daunorubicin C-14 hydroxylase (M. L. Dickens and W. R. Strohl, J. Bacteriol. 178: 3389-3395, 1996). In the present study, we show that DoxA also catalyzes the hydroxylation of 13-deoxycarminomycin and 13-deoxydaunorubicin to 13-dihydrocarminomycin and 13-dihydrodaunorubicin, respectively, as well as oxidizing the 13-dihydro-anthracyclines to their respective 13-keto forms. The Streptomyces sp. strain C5 dauP gene product also was shown unequivocally to remove the carbomethoxy group of the epsilon-rhodomycinone-glycoside (rhodomycin D) to form 10-carboxy-13-deoxycarminomycin. Additionally, Streptomyces sp. strain C5 DauK was found to methylate the anthracyclines rhodomycin D, 10-carboxy-13-deoxycarminomycin, and 13-deoxy-carminomycin, at the 4-hydroxyl position, indicating a broader substrate specificity than was previously known. The products of Streptomyces sp. strain C5 doxA, dauK, and dauP were sufficient and necessary to confer on Streptomyces lividans TK24 the ability to convert rhodomycin D, the first glycoside in daunorubicin and doxorubicin biosynthesis, to doxorubicin. << Less
J. Bacteriol. 179:2641-2650(1997) [PubMed] [EuropePMC]
This publication is cited by 6 other entries.