Enzymes
| UniProtKB help_outline | 4 proteins |
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- Name help_outline D-xylonate Identifier CHEBI:17746 Charge -1 Formula C5H9O6 InChIKeyhelp_outline QXKAIJAYHKCRRA-FLRLBIABSA-M SMILEShelp_outline OC[C@@H](O)[C@H](O)[C@@H](O)C([O-])=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 2-dehydro-3-deoxy-D-arabinonate Identifier CHEBI:16699 Charge -1 Formula C5H7O5 InChIKeyhelp_outline UQIGQRSJIKIPKZ-VKHMYHEASA-M SMILEShelp_outline OC[C@@H](O)CC(=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 6 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- 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
Cross-references
| RHEA:19157 | RHEA:19158 | RHEA:19159 | RHEA:19160 | |
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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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D-Galactonate dehydrase. Purification and properties.
Donald A., Sibley D., Lyons D.E., Dahms A.S.
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D-xylo-Aldonate dehydratase.
Dahms A.S., Donald A.
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D-xylose degradation pathway in the halophilic archaeon Haloferax volcanii.
Johnsen U., Dambeck M., Zaiss H., Fuhrer T., Soppa J., Sauer U., Schonheit P.
The pathway of D-xylose degradation in archaea is unknown. In a previous study we identified in Haloarcula marismortui the first enzyme of xylose degradation, an inducible xylose dehydrogenase (Johnsen, U., and Schönheit, P. (2004) J. Bacteriol. 186, 6198-6207). Here we report a comprehensive stud ... >> More
The pathway of D-xylose degradation in archaea is unknown. In a previous study we identified in Haloarcula marismortui the first enzyme of xylose degradation, an inducible xylose dehydrogenase (Johnsen, U., and Schönheit, P. (2004) J. Bacteriol. 186, 6198-6207). Here we report a comprehensive study of the complete D-xylose degradation pathway in the halophilic archaeon Haloferax volcanii. The analyses include the following: (i) identification of the degradation pathway in vivo following (13)C-labeling patterns of proteinogenic amino acids after growth on [(13)C]xylose; (ii) identification of xylose-induced genes by DNA microarray experiments; (iii) characterization of enzymes; and (iv) construction of in-frame deletion mutants and their functional analyses in growth experiments. Together, the data indicate that D-xylose is oxidized exclusively to the tricarboxylic acid cycle intermediate alpha-ketoglutarate, involving D-xylose dehydrogenase (HVO_B0028), a novel xylonate dehydratase (HVO_B0038A), 2-keto-3-deoxyxylonate dehydratase (HVO_B0027), and alpha-ketoglutarate semialdehyde dehydrogenase (HVO_B0039). The functional involvement of these enzymes in xylose degradation was proven by growth studies of the corresponding in-frame deletion mutants, which all lost the ability to grow on d-xylose, but growth on glucose was not significantly affected. This is the first report of an archaeal D-xylose degradation pathway that differs from the classical D-xylose pathway in most bacteria involving the formation of xylulose 5-phosphate as an intermediate. However, the pathway shows similarities to proposed oxidative pentose degradation pathways to alpha-ketoglutarate in few bacteria, e.g. Azospirillum brasilense and Caulobacter crescentus, and in the archaeon Sulfolobus solfataricus. << Less
J. Biol. Chem. 284:27290-27303(2009) [PubMed] [EuropePMC]
This publication is cited by 3 other entries.