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- Name help_outline terephthalate Identifier CHEBI:30043 (Beilstein: 3590515; CAS: 3198-30-9) help_outline Charge -2 Formula C8H4O4 InChIKeyhelp_outline KKEYFWRCBNTPAC-UHFFFAOYSA-L SMILEShelp_outline [O-]C(=O)c1ccc(cc1)C([O-])=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 NADH Identifier CHEBI:57945 (Beilstein: 3869564) help_outline Charge -2 Formula C21H27N7O14P2 InChIKeyhelp_outline BOPGDPNILDQYTO-NNYOXOHSSA-L 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](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 1,120 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 2,727 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 9,521 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (3S,4R)-3,4-dihydroxycyclohexa-1,5-diene-1,4-dicarboxylate Identifier CHEBI:57412 Charge -2 Formula C8H6O6 InChIKeyhelp_outline UKFMEOHAOCKDOL-YLWLKBPMSA-L SMILEShelp_outline O[C@H]1C=C(C=C[C@]1(O)C([O-])=O)C([O-])=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 NAD+ Identifier CHEBI:57540 (Beilstein: 3868403) help_outline Charge -1 Formula C21H26N7O14P2 InChIKeyhelp_outline BAWFJGJZGIEFAR-NNYOXOHSSA-M 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](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 1,190 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:10312 | RHEA:10313 | RHEA:10314 | RHEA:10315 | |
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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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Enzymatic properties of terephthalate 1,2-dioxygenase of Comamonas sp. strain E6.
Fukuhara Y., Kasai D., Katayama Y., Fukuda M., Masai E.
The tphA1 II and tphA2 II A3 II genes of Comamonas sp. E6 perhaps code for the terephthalate (TPA) 1,2-dioxygenase (TPADO). To characterize E6 TPADO, these genes were expressed in a His-tagged form in Escherichia coli, and the recombinant proteins were purified. TPADO activity was reconstituted fr ... >> More
The tphA1 II and tphA2 II A3 II genes of Comamonas sp. E6 perhaps code for the terephthalate (TPA) 1,2-dioxygenase (TPADO). To characterize E6 TPADO, these genes were expressed in a His-tagged form in Escherichia coli, and the recombinant proteins were purified. TPADO activity was reconstituted from TphA1 II and TphA2 II A3 II, indicating that TPADO consists of a reductase (TphA1 II) and a terminal oxygenase component (TphA2 II and TphA3 II). TphA1(II) contains FAD, and the presence of a plant-type [2Fe-2S] cluster was suggested. These results indicate that TPADO is a class IB aromatic ring-hydroxylating dioxygenase. NADH and NADPH were effective as electron donors for TphA1 II, but NADPH appeared to be the physiological electron donor, based on the kinetic parameters. TPADO showed activity only toward TPA, and Fe2+ was required for it. The Km values for TPA and the Vmax were determined to be 72+/-6 microM and 9.87+/-0.06 U/mg respectively. << Less
Biosci. Biotechnol. Biochem. 72:2335-2341(2008) [PubMed] [EuropePMC]
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Terephthalate 1,2-dioxygenase system from Comamonas testosteroni T-2: purification and some properties of the oxygenase component.
Schlafli H.R., Weiss M.A., Leisinger T., Cook A.M.
Comamonas testosteroni T-2, grown in terephthalate (TER)-salts medium, synthesizes inducible enzymes that convert TER to (1R,2S)-dihydroxy-3,5-cyclohexadiene-1,4-dicarboxylic acid (DCD) and protocatechuate (PC). Anion-exchange chromatography of cell extracts yielded two sets of fractions, R and Z, ... >> More
Comamonas testosteroni T-2, grown in terephthalate (TER)-salts medium, synthesizes inducible enzymes that convert TER to (1R,2S)-dihydroxy-3,5-cyclohexadiene-1,4-dicarboxylic acid (DCD) and protocatechuate (PC). Anion-exchange chromatography of cell extracts yielded two sets of fractions, R and Z, that were necessary for oxygenation of TER to DCD; we termed this activity the TER dioxygenase system (TERDOS). An NAD(+)-dependent DCD dehydrogenase, which converted DCD to PC, overlapped all fractions R. No significant purification from fraction R, which contained an NADH-dependent reductase function(s) of TERDOS, was attained. Fraction Z, at the end of the gradient, contained essentially one protein, which was further purified by hydrophobic interaction chromatography. This component, Z, had the UV-visible spectrum and electron paramagnetic resonance characteristics of a Rieske [2Fe-2S] protein and was considered to be the oxygenase. M(r)s of about 126,000 for oxygenase Z under native conditions were observed. Oxygenase Z consisted of two subunits, alpha and beta, with M(r)s of 49,000 and 18,000, respectively, under denaturing conditions. We presume that this oxygenase has an alpha 2 beta 2 structure. The sequences of the N-terminal amino acids of each subunit were determined. The activity of the purified enzyme was enhanced about fivefold by addition of Fe2+. In the presence of O2, NADH, and fraction R, component Z catalyzed the stoichiometric transformation of TER to PC, with the intermediate formation of DCD. The reaction was confirmed as a dioxygenation when we observed incorporation of two oxygen atoms from 18O2 into PC. The substrate range of TERDOS appeared to be narrow; apart from TER, only 2,5-dicarboxypyridine and 1,4-dicarboxynaphthalene (of 11 compounds tested) were converted to a product. << Less