Reaction participants Show >> << Hide
- Name help_outline ATP Identifier CHEBI:30616 (Beilstein: 3581767) help_outline Charge -4 Formula C10H12N5O13P3 InChIKeyhelp_outline ZKHQWZAMYRWXGA-KQYNXXCUSA-J SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,280 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H2O Identifier CHEBI:15377 (Beilstein: 3587155; CAS: 7732-18-5) help_outline Charge 0 Formula H2O InChIKeyhelp_outline XLYOFNOQVPJJNP-UHFFFAOYSA-N SMILEShelp_outline [H]O[H] 2D coordinates Mol file for the small molecule Search links Involved in 6,204 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline L-phenylalanine Identifier CHEBI:58095 Charge 0 Formula C9H11NO2 InChIKeyhelp_outline COLNVLDHVKWLRT-QMMMGPOBSA-N SMILEShelp_outline [NH3+][C@@H](Cc1ccccc1)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 74 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline AMP Identifier CHEBI:456215 Charge -2 Formula C10H12N5O7P InChIKeyhelp_outline UDMBCSSLTHHNCD-KQYNXXCUSA-L SMILEShelp_outline Nc1ncnc2n(cnc12)[C@@H]1O[C@H](COP([O-])([O-])=O)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 508 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline D-phenylalanine Identifier CHEBI:57981 Charge 0 Formula C9H11NO2 InChIKeyhelp_outline COLNVLDHVKWLRT-MRVPVSSYSA-N SMILEShelp_outline [NH3+][C@H](Cc1ccccc1)C([O-])=O 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 diphosphate Identifier CHEBI:33019 (Beilstein: 185088) help_outline Charge -3 Formula HO7P2 InChIKeyhelp_outline XPPKVPWEQAFLFU-UHFFFAOYSA-K SMILEShelp_outline OP([O-])(=O)OP([O-])([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 1,129 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
Cross-references
| RHEA:20201 | RHEA:20202 | RHEA:20203 | RHEA:20204 | |
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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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Gramicidin S synthetase 1 (phenylalanine racemase), a prototype of amino acid racemases containing the cofactor 4'-phosphopantetheine.
Stein T., Kluge B., Vater J., Franke P., Otto A., Wittmann-Liebold B.
The biosynthesis of the decapeptide antibiotic gramicidin S in Bacillus brevis ATCC 9999 is catalyzed by a multienzyme system consisting of two multifunctional proteins, gramicidin S synthetase 1 and 2, encoded by the grsA and grsB genes, respectively. Gramicidin S synthetase 1 (phenylalanine race ... >> More
The biosynthesis of the decapeptide antibiotic gramicidin S in Bacillus brevis ATCC 9999 is catalyzed by a multienzyme system consisting of two multifunctional proteins, gramicidin S synthetase 1 and 2, encoded by the grsA and grsB genes, respectively. Gramicidin S synthetase 1 (phenylalanine racemase, EC 5.1.1.11, GS1) racemizes phenylalanine in the thioester-bound stage. The amount of 4'-phosphopantetheine liberated from highly purified GS1 was determined microbiologically using Lacto-bacillus plantarum as the test organism. It matches exactly with the amount of L-[14C]phenylalanine covalently incorporated by GS1 as thioester. The reaction center of GS1 for L-phenylalanine thiolation and racemization was labeled with [3H]iodoacetic acid. After tryptic fragmentation of the 3H-carboxymethylated enzyme, the active site peptide for thioester binding and racemization of phenylalanine was isolated in pure form by multistep methodology and investigated by sequence, amino acid, and mass spectrometric analysis. A 4'-phosphopantetheine carrier was found to be attached to the active site serine of the consensus motif LGGDSI forming the thiolation site of phenylalanine. These specific properties establish GS1 as a prototype of amino acid racemases using 4'-phosphopantetheine as a cofactor and yield further evidence that multiple Pan carriers are involved in gramicidin S formation. Our results are strong evidence for the "multiple carrier model" as a new concept of nonribosomal peptide biosynthesis at protein templates as recently proposed [Stein, T., et al. (1994) FEBS Lett. 340, 39-44]. << Less