Enzymes
| UniProtKB help_outline | 5 proteins |
| Enzyme class help_outline |
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- Name help_outline (6S)-5-formyl-5,6,7,8-tetrahydrofolate Identifier CHEBI:57457 (Beilstein: 3923649) help_outline Charge -2 Formula C20H21N7O7 InChIKeyhelp_outline VVIAGPKUTFNRDU-STQMWFEESA-L SMILEShelp_outline [H]C(=O)N1[C@@H](CNc2ccc(cc2)C(=O)N[C@@H](CCC([O-])=O)C([O-])=O)CNc2nc(N)[nH]c(=O)c12 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 L-glutamate Identifier CHEBI:29985 (CAS: 11070-68-1) help_outline Charge -1 Formula C5H8NO4 InChIKeyhelp_outline WHUUTDBJXJRKMK-VKHMYHEASA-M SMILEShelp_outline [NH3+][C@@H](CCC([O-])=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 242 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (6S)-5,6,7,8-tetrahydrofolate Identifier CHEBI:57453 (Beilstein: 10223255) help_outline Charge -2 Formula C19H21N7O6 InChIKeyhelp_outline MSTNYGQPCMXVAQ-RYUDHWBXSA-L SMILEShelp_outline Nc1nc2NC[C@H](CNc3ccc(cc3)C(=O)N[C@@H](CCC([O-])=O)C([O-])=O)Nc2c(=O)[nH]1 2D coordinates Mol file for the small molecule Search links Involved in 40 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 9,176 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline N-formyl-L-glutamate Identifier CHEBI:17684 Charge -2 Formula C6H7NO5 InChIKeyhelp_outline ADZLWSMFHHHOBV-BYPYZUCNSA-L SMILEShelp_outline [H]C(=O)N[C@@H](CCC([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
Cross-references
| RHEA:23240 | RHEA:23241 | RHEA:23242 | RHEA:23243 | |
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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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Moonlighting glutamate formiminotransferases can functionally replace 5-formyltetrahydrofolate cycloligase.
Jeanguenin L., Lara-Nunez A., Pribat A., Mageroy M.H., Gregory J.F. III, Rice K.C., de Crecy-Lagard V., Hanson A.D.
5-Formyltetrahydrofolate (5-CHO-THF) is formed by a side reaction of serine hydroxymethyltransferase. Unlike other folates, it is not a one-carbon donor but a potent inhibitor of folate enzymes and must therefore be metabolized. Only 5-CHO-THF cycloligase (5-FCL) is generally considered to do this ... >> More
5-Formyltetrahydrofolate (5-CHO-THF) is formed by a side reaction of serine hydroxymethyltransferase. Unlike other folates, it is not a one-carbon donor but a potent inhibitor of folate enzymes and must therefore be metabolized. Only 5-CHO-THF cycloligase (5-FCL) is generally considered to do this. However, comparative genomic analysis indicated (i) that certain prokaryotes lack 5-FCL, implying that they have an alternative 5-CHO-THF-metabolizing enzyme, and (ii) that the histidine breakdown enzyme glutamate formiminotransferase (FT) might moonlight in this role. A functional complementation assay for 5-CHO-THF metabolism was developed in Escherichia coli, based on deleting the gene encoding 5-FCL (ygfA). The deletion mutant accumulated 5-CHO-THF and, with glycine as sole nitrogen source, showed a growth defect; both phenotypes were complemented by bacterial or archaeal genes encoding FT. Furthermore, utilization of supplied 5-CHO-THF by Streptococcus pyogenes was shown to require expression of the native FT. Recombinant bacterial and archaeal FTs catalyzed formyl transfer from 5-CHO-THF to glutamate, with k(cat) values of 0.1-1.2 min(-1) and K(m) values for 5-CHO-THF and glutamate of 0.4-5 μM and 0.03-1 mM, respectively. Although the formyltransferase activities of these proteins were far lower than their formiminotransferase activities, the K(m) values for both substrates relative to their intracellular levels in prokaryotes are consistent with significant in vivo flux through the formyltransferase reaction. Collectively, these data indicate that FTs functionally replace 5-FCL in certain prokaryotes. << Less
J. Biol. Chem. 285:41557-41566(2010) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.