Enzymes
| UniProtKB help_outline | 1 proteins |
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| GO Molecular Function help_outline |
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- Name help_outline 5-hydroxy-6-methylpyridine-3,4-dicarboxylate Identifier CHEBI:77620 Charge -2 Formula C8H5NO5 InChIKeyhelp_outline LVJJEIJOKPHQOU-UHFFFAOYSA-L SMILEShelp_outline Cc1[nH+]cc(C([O-])=O)c(C([O-])=O)c1[O-] 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 9,431 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 3-hydroxy-2-methylpyridine-5-carboxylate Identifier CHEBI:57528 Charge -1 Formula C7H6NO3 InChIKeyhelp_outline NYEFWJFPBFRRKU-UHFFFAOYSA-M SMILEShelp_outline Cc1ncc(cc1O)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 CO2 Identifier CHEBI:16526 (Beilstein: 1900390; CAS: 124-38-9) help_outline Charge 0 Formula CO2 InChIKeyhelp_outline CURLTUGMZLYLDI-UHFFFAOYSA-N SMILEShelp_outline O=C=O 2D coordinates Mol file for the small molecule Search links Involved in 997 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:13669 | RHEA:13670 | RHEA:13671 | RHEA:13672 | |
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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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Gene identification and structural characterization of the pyridoxal 5'-phosphate degradative protein 3-hydroxy-2-methylpyridine-4,5-dicarboxylate decarboxylase from mesorhizobium loti MAFF303099.
Mukherjee T., McCulloch K.M., Ealick S.E., Begley T.P.
The function of the mlr6791 gene from Mesorhizobium loti MAFF303099 has been identified. This gene encodes 3-hydroxy-2-methylpyridine-4,5-dicarboxylate decarboxylase (HMPDdc), an enzyme involved in the catabolism of pyridoxal 5'-phosphate (Vitamin B6). This enzyme was overexpressed in Escherichia ... >> More
The function of the mlr6791 gene from Mesorhizobium loti MAFF303099 has been identified. This gene encodes 3-hydroxy-2-methylpyridine-4,5-dicarboxylate decarboxylase (HMPDdc), an enzyme involved in the catabolism of pyridoxal 5'-phosphate (Vitamin B6). This enzyme was overexpressed in Escherichia coli and characterized. HMPDdc is a 26 kDa protein that catalyzes the decarboxylation of 3-hydroxy-2-methylpyridine-4,5-dicarboxylate to 3-hydroxy-2-methylpyridine-5-carboxylate. The KM and kcat were found to be 366 microM and 0.6 s-1, respectively. The structure of this enzyme was determined at 1.9 A resolution using SAD phasing and belongs to the class II aldolase/adducin superfamily. While the decarboxylation of hydroxy-substituted benzene rings is a common motif in biosynthesis, the mechanism of this reaction is still poorly characterized. The structural studies described here suggest that catalysis of such decarboxylations proceeds by an aldolase-like mechanism. << Less
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[BACTERIAL OXIDATION OF VITAMIN B6. IV. ENZYMATIC DECARBOXYLATION OF 2-METHYL-3-HYDROXYPYRIDINE-4,5-DICARBOXYLIC ACID].
SNELL E.E., SMUCKER A.A., RINGELMANN E., LYNEN F.