Enzymes
UniProtKB help_outline | 8,410 proteins |
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Reaction participants Show >> << Hide
- Name help_outline CoA Identifier CHEBI:57287 (Beilstein: 11604429) help_outline Charge -4 Formula C21H32N7O16P3S InChIKeyhelp_outline RGJOEKWQDUBAIZ-IBOSZNHHSA-J SMILEShelp_outline CC(C)(COP([O-])(=O)OP([O-])(=O)OC[C@H]1O[C@H]([C@H](O)[C@@H]1OP([O-])([O-])=O)n1cnc2c(N)ncnc12)[C@@H](O)C(=O)NCCC(=O)NCCS 2D coordinates Mol file for the small molecule Search links Involved in 1,500 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline indole-3-pyruvate Identifier CHEBI:17640 Charge -1 Formula C11H8NO3 InChIKeyhelp_outline RSTKLPZEZYGQPY-UHFFFAOYSA-M SMILEShelp_outline [O-]C(=O)C(=O)Cc1c[nH]c2ccccc12 2D coordinates Mol file for the small molecule Search links Involved in 16 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
oxidized [2Fe-2S]-[ferredoxin]
Identifier
RHEA-COMP:10000
Reactive part
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- Name help_outline [2Fe-2S]2+ Identifier CHEBI:33737 Charge 2 Formula Fe2S2 InChIKeyhelp_outline XSOVBBGAMBLACL-UHFFFAOYSA-N SMILEShelp_outline S1[Fe+]S[Fe+]1 2D coordinates Mol file for the small molecule Search links Involved in 238 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (indol-3-yl)acetyl-CoA Identifier CHEBI:57271 Charge -4 Formula C31H39N8O17P3S InChIKeyhelp_outline WXOGUAPLOCTRFO-HSJNEKGZSA-J SMILEShelp_outline CC(C)(COP([O-])(=O)OP([O-])(=O)OC[C@H]1O[C@H]([C@H](O)[C@@H]1OP([O-])([O-])=O)n1cnc2c(N)ncnc12)[C@@H](O)C(=O)NCCC(=O)NCCSC(=O)Cc1c[nH]c2ccccc12 2D coordinates Mol file for the small molecule Search links Involved in 4 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
- 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
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Namehelp_outline
reduced [2Fe-2S]-[ferredoxin]
Identifier
RHEA-COMP:10001
Reactive part
help_outline
- Name help_outline [2Fe-2S]1+ Identifier CHEBI:33738 Charge 1 Formula Fe2S2 InChIKeyhelp_outline MAGIRAZQQVQNKP-UHFFFAOYSA-N SMILEShelp_outline S1[Fe]S[Fe+]1 2D coordinates Mol file for the small molecule Search links Involved in 238 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
RHEA:12645 | RHEA:12646 | RHEA:12647 | RHEA:12648 | |
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Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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More general form(s) of this reaction
Publications
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Indolepyruvate ferredoxin oxidoreductase from Pyrococcus sp. KOD1 possesses a mosaic structure showing features of various oxidoreductases.
Siddiqui M.A., Fujiwara S., Imanaka T.
Indolepyruvate ferredoxin oxidoreductase (IOR) catalyzes the oxidative decarboxylation of arylpyruvates. Gene cloning and sequencing analysis of the IOR gene from the hyperthermophilic archaeon Pyrococcus sp. KOD1 was performed. Two genes, iorA and iorB. encoding alpha and beta subunits of IOR wer ... >> More
Indolepyruvate ferredoxin oxidoreductase (IOR) catalyzes the oxidative decarboxylation of arylpyruvates. Gene cloning and sequencing analysis of the IOR gene from the hyperthermophilic archaeon Pyrococcus sp. KOD1 was performed. Two genes, iorA and iorB. encoding alpha and beta subunits of IOR were found to be tandemly arranged, which suggests that gene expression is translationally coupled. Sequence analysis showed the C-terminal region of the alpha subunit to have a typical ferredoxin-type [4Fe-4S] cluster motif (CXXCXXCXXCXXXCP), which is similar to that present in the delta subunits of other oxidoreductases such as pyruvate ferredoxin oxidoreductase (POR) and 2-ketoisovalerate ferredoxin oxidoreductase (VOR). We suggest that the alpha subunit of KOD1-IOR has a mosaic structure composed of features characteristic of the alpha, beta and delta subunits from POR and VOR. KOD1-IOR was overproduced in anaerobically incubated Escherichia coli cells and the crude enzyme was extracted under anaerobic conditions. The optimal temperature for activity of recombinant IOR was 70 degrees C and the half-life of this enzyme in the presence of air was 15 min at 25 degrees C. << Less
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Indolepyruvate ferredoxin oxidoreductase from the hyperthermophilic archaeon Pyrococcus furiosus. A new enzyme involved in peptide fermentation.
Mai X., Adams M.W.
Pyrococcus furiosus is a strictly anaerobic archaeon that grows optimally at 100 degrees C by a fermentative-type metabolism in which complex peptide mixtures such as yeast extract and Tryptone, and also certain sugars, are oxidized to organic acids, H2 and CO2. Enzymes involved in the utilization ... >> More
Pyrococcus furiosus is a strictly anaerobic archaeon that grows optimally at 100 degrees C by a fermentative-type metabolism in which complex peptide mixtures such as yeast extract and Tryptone, and also certain sugars, are oxidized to organic acids, H2 and CO2. Enzymes involved in the utilization of peptides such as proteases, aromatic amino transferases, and glutamate dehydrogenase have been previously purified from this organism. It is shown here that P. furiosus also contains significant cytoplasmic concentrations of a new enzyme termed indolepyruvate ferredoxin oxidoreductase (IOR). This catalyzes the oxidative decarboxylation of aryl pyruvates, which are generated by the transamination of aromatic amino acids, to the corresponding aryl acetyl-CoA. IOR is a tetramer (alpha 2 beta 2) of two identical subunits (66,000 and 23,000 Da) with a molecular weight of 180,000. The enzyme contains one molecule of thiamine pyrophosphate and four [4Fe-4S]2+,1+ and one [3Fe-4S]0,1+ cluster, as determined by iron analyses and EPR spectroscopy. Significant amounts of other metals such as copper and zinc were not detected. IOR was virtually inactive at 25 degrees C and exhibited optimal activity above 90 degrees C (at pH 8.0) and at pH 8.5-10.5 (at 80 degrees C). The enzyme was sensitive to inactivation by O2, losing 50% of its activity after exposure to air for 20 min at 23 degrees C, and was quite thermostable, with a half-life of activity at 80 degrees C (under anaerobic conditions) of about 80 min. The Km values (in microM) for indolepyruvate, p-hydroxyphenylpyruvate, phenylpyruvate, CoASH, and P. furiosus ferredoxin, the physiological electron carrier, were 250, 110, 90, 17, and 48, respectively. IOR was inhibited by KCN (apparent Ki = 7.5 mM), but not by CO (1 atm). An enzyme analogous to IOR has not been reported previously. Curiously, it has few properties in common with the pyruvate ferredoxin oxidoreductase of P. furiosus, even though the two enzymes catalyze virtually identical reactions. In fact, of known ketoacid oxidoreductases, the catalytic mechanism of IOR appears to be most similar to that of the pyruvate ferredoxin oxidoreductase from the hyperthermophilic bacterium Thermotoga maritima. << Less
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2-keto acid oxidoreductases from Pyrococcus furiosus and Thermococcus litoralis.
Schut G.J., Menon A.L., Adams M.W.
Methods Enzymol 331:144-158(2001) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Structures and functions of four anabolic 2-oxoacid oxidoreductases in Methanobacterium thermoautotrophicum.
Tersteegen A., Linder D., Thauer R.K., Hedderich R.
Methanobacterium thermoautotrophicum (strain Marburg), which grows autotrophically on H2 and CO2, was found to contain 2-oxoisovalerate oxidoreductase (Vor) and indolepyruvate oxidoreductase (Ior) besides pyruvate oxidoreductase (Por) and 2-oxoglutarate oxidoreductase (Kor). So far, Vor and Ior ha ... >> More
Methanobacterium thermoautotrophicum (strain Marburg), which grows autotrophically on H2 and CO2, was found to contain 2-oxoisovalerate oxidoreductase (Vor) and indolepyruvate oxidoreductase (Ior) besides pyruvate oxidoreductase (Por) and 2-oxoglutarate oxidoreductase (Kor). So far, Vor and Ior have only been detected in peptide-utilizing hyperthermophilic Archaea. The four 2-oxoacid oxidoreductases were purified and characterized with respect to their subunit composition, N-terminal amino acid sequences, and catalytic properties. Por and Kor were composed of four different subunits, Vor was composed of three different subunits, and Ior of two different subunits. Comparisons of the N-terminal amino acid sequences revealed that the four enzymes are structurally related to each other and to the respective enzymes from Pyrococcus and Thermococcus sp. Vor from M. thermoautotrophicum differed from Vor from Pyrococcus furiosus in being composed of only three instead of four different subunits. Evidence is presented that in the autotrophic methanogen the four 2-oxoacid oxidoreductases have anabolic functions, Vor and Ior being involved in the biosynthesis of amino acids from fatty acids taken up from the growth medium, as shown by 14C-labelling studies. << Less
Eur. J. Biochem. 244:862-868(1997) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.