Enzymes
| UniProtKB help_outline | 1,865 proteins |
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- Name help_outline 5,6,7,8-tetrahydromethanopterin Identifier CHEBI:58103 Charge -3 Formula C30H42N6O16P InChIKeyhelp_outline SCBIBGUJSMHIAI-LHIIQLEZSA-K SMILEShelp_outline [H][C@]1(Nc2c(N[C@H]1C)nc(N)[nH]c2=O)[C@@H](C)Nc1ccc(C[C@H](O)[C@H](O)[C@H](O)CO[C@H]2O[C@H](COP([O-])(=O)O[C@@H](CCC([O-])=O)C([O-])=O)[C@@H](O)[C@H]2O)cc1 2D coordinates Mol file for the small molecule Search links Involved in 9 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 N-formylmethanofuran Identifier CHEBI:57727 Charge -5 Formula C35H39N4O16 InChIKeyhelp_outline RGBIJPWAWLXPOC-XUJYPJAKSA-I SMILEShelp_outline [O-]C(=O)CC[C@H]([C@H](CCC(=O)N[C@@H](CCC(=O)N[C@@H](CCC(=O)NCCc1ccc(OCc2coc(CNC=O)c2)cc1)C([O-])=O)C([O-])=O)C([O-])=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 methanofuran Identifier CHEBI:58151 Charge -4 Formula C34H40N4O15 InChIKeyhelp_outline CKRUWFDORAQSRC-QYOOZWMWSA-J SMILEShelp_outline [NH3+]Cc1cc(COc2ccc(CCNC(=O)CC[C@H](NC(=O)CC[C@H](NC(=O)CC[C@@H]([C@@H](CCC([O-])=O)C([O-])=O)C([O-])=O)C([O-])=O)C([O-])=O)cc2)co1 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 N5-formyl-5,6,7,8-tetrahydromethanopterin Identifier CHEBI:58018 Charge -3 Formula C31H42N6O17P InChIKeyhelp_outline RMPHWTMYCVTPKB-QZQIFXBMSA-K SMILEShelp_outline [H][C@](C)(Nc1ccc(C[C@]([H])(O)[C@]([H])(O)[C@]([H])(O)CO[C@H]2O[C@H](COP([O-])(=O)O[C@@]([H])(CCC([O-])=O)C([O-])=O)[C@@H](O)[C@H]2O)cc1)C1N(C=O)c2c(N[C@@]1([H])C)nc(N)[nH]c2=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
Cross-references
| RHEA:18061 | RHEA:18062 | RHEA:18063 | RHEA:18064 | |
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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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The role of formylmethanofuran: tetrahydromethanopterin formyltransferase in methanogenesis from carbon dioxide.
Donnelly M.I., Wolfe R.S.
Formylmethanofuran: tetrahydromethanopterin formyltransferase was purified to electrophoretic homogeneity from cells of Methanobacterium thermoautotrophicum. The enzyme is a tetramer of similar or identical subunits (Mr = 41,000). The equilibrium favors transfer of the formyl group to tetrahydrome ... >> More
Formylmethanofuran: tetrahydromethanopterin formyltransferase was purified to electrophoretic homogeneity from cells of Methanobacterium thermoautotrophicum. The enzyme is a tetramer of similar or identical subunits (Mr = 41,000). The equilibrium favors transfer of the formyl group to tetrahydromethanopterin (H4MPT) at physiological pH. The product of formyl transfer by the purified enzyme was shown by a number of criteria to be 5-formyl-H4MPT, as opposed to 10-formyl-H4MPT or 5,10-methenyl-H4MPT. Reconstitution of a portion of the methanogenic C1 cycle was effected by combining purified formyltransferase, methenyl-H4MPT cyclohydrolase, formylmethanofuran, and H4MPT to give methenyl-H4MPT. Additional reconstitution experiments established that the formyltransferase is an essential enzyme for the conversion of carbon dioxide to methane. In conjunction with previously published data (Donnelly, M.I., Escalante-Semerena, J.C., Rinehart, K. L., Jr., and Wolfe, R.S. (1985) Arch. Biochem. Biophys. 242, 430-439), these data substantiate the role of 5-formyl-H4MPT as an intermediate of methanogenesis. << Less
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Generation of formate by the formyltransferase/hydrolase complex (Fhc) from Methylobacterium extorquens AM1.
Pomper B.K., Saurel O., Milon A., Vorholt J.A.
Methylobacterium extorquens AM1 possesses a formyltransferase (Ftr) complex that is essential for growth in the presence of methanol and involved in formaldehyde oxidation to CO(2). One of the subunits of the complex carries the catalytic site for transfer of the formyl group from tetrahydromethan ... >> More
Methylobacterium extorquens AM1 possesses a formyltransferase (Ftr) complex that is essential for growth in the presence of methanol and involved in formaldehyde oxidation to CO(2). One of the subunits of the complex carries the catalytic site for transfer of the formyl group from tetrahydromethanopterin to methanofuran (MFR). We now found via nuclear magnetic resonance-based studies that the Ftr complex also catalyzes the hydrolysis of formyl-MFR and generates formate. The enzyme was therefore renamed Ftr/hydrolase complex (Fhc). FhcA shares a sequence pattern with amidohydrolases and is assumed to be the catalytic site where the hydrolysis takes place. << Less
FEBS Lett. 523:133-137(2002) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Characterization of the formyltransferase from Methylobacterium extorquens AM1.
Pomper B.K., Vorholt J.A.
Methylobacterium extorquens AM1 possesses a formaldehyde-oxidation pathway that involves enzymes with high sequence identity with enzymes from methanogenic and sulfate-reducing archaea. Here we describe the purification and characterization of formylmethanofuran-tetrahydromethanopterin formyltrans ... >> More
Methylobacterium extorquens AM1 possesses a formaldehyde-oxidation pathway that involves enzymes with high sequence identity with enzymes from methanogenic and sulfate-reducing archaea. Here we describe the purification and characterization of formylmethanofuran-tetrahydromethanopterin formyltransferase (Ftr), which catalyzes the reversible formation of formylmethanofuran (formylMFR) and tetrahydromethanopterin (H4MPT) from N5-formylH4MPT and methanofuran (MFR). Formyltransferase from M. extorquens AM1 showed activity with MFR and H4MPT isolated from the methanogenic archaeon Methanothermobacter marburgensis (apparent Km for formylMFR = 50 microM; apparent Km for H4MPT = 30 microM). The enzyme is encoded by the ffsA gene and exhibits a sequence identity of approximately 40% with Ftr from methanogenic and sulfate-reducing archaea. The 32-kDa Ftr protein from M. extorquens AM1 copurified in a complex with three other polypeptides of 60 kDa, 37 kDa and 29 kDa. Interestingly, these are encoded by the genes orf1, orf2 and orf3 which show sequence identity with the formylMFR dehydrogenase subunits FmdA, FmdB and FmdC, respectively. The clustering of the genes orf2, orf1, ffsA, and orf3 in the chromosome of M. extorquens AM1 indicates that, in the bacterium, the respective polypeptides form a functional unit. Expression studies in Escherichia coli indicate that Ftr requires the other subunits of the complex for stability. Despite the fact that three of the polypeptides of the complex showed sequence similarity to subunits of Fmd from methanogens, the complex was not found to catalyze the oxidation of formylMFR. Detailed comparison of the primary structure revealed that Orf2, the homolog of the active site harboring subunit FmdB, lacks the binding motifs for the active-site cofactors molybdenum, molybdopterin and a [4Fe-4S] cluster. Cytochrome c was found to be spontaneously reduced by H4MPT. On the basis of this property, a novel assay for Ftr activity and MFR is described. << Less