Enzymes
| UniProtKB help_outline | 1 proteins |
| Enzyme class help_outline |
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Reaction participants Show >> << Hide
- Name help_outline (2S,3S)-3-methylphenylalanine Identifier CHEBI:76864 Charge 0 Formula C10H13NO2 InChIKeyhelp_outline IRZQDMYEJPNDEN-CBAPKCEASA-N SMILEShelp_outline C[C@H]([C@H]([NH3+])C([O-])=O)c1ccccc1 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline 2-oxoglutarate Identifier CHEBI:16810 (Beilstein: 3664503; CAS: 64-15-3) help_outline Charge -2 Formula C5H4O5 InChIKeyhelp_outline KPGXRSRHYNQIFN-UHFFFAOYSA-L SMILEShelp_outline [O-]C(=O)CCC(=O)C([O-])=O 2D coordinates Mol file for the small molecule Search links Involved in 425 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline (3S)-2-oxo-3-phenylbutanoate Identifier CHEBI:74119 Charge -1 Formula C10H9O3 InChIKeyhelp_outline AXLLOSUYAVXOIN-ZETCQYMHSA-M SMILEShelp_outline C[C@H](C(=O)C([O-])=O)c1ccccc1 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 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 244 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:39911 | RHEA:39912 | RHEA:39913 | RHEA:39914 | |
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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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In vitro characterization of enzymes involved in the synthesis of nonproteinogenic residue (2S,3S)-beta-methylphenylalanine in glycopeptide antibiotic mannopeptimycin.
Huang Y.T., Lyu S.Y., Chuang P.H., Hsu N.S., Li Y.S., Chan H.C., Huang C.J., Liu Y.C., Wu C.J., Yang W.B., Li T.L.
Mannopeptimycin, a potent drug lead, has superior activity against difficult-to-treat multidrug-resistant Gram-positive pathogens such as methicillin-resistant Staphylococcus aureus (MRSA). (2S,3S)-beta-Methylphenylalanine is a residue in the cyclic hexapeptide core of mannopeptimycin, but the syn ... >> More
Mannopeptimycin, a potent drug lead, has superior activity against difficult-to-treat multidrug-resistant Gram-positive pathogens such as methicillin-resistant Staphylococcus aureus (MRSA). (2S,3S)-beta-Methylphenylalanine is a residue in the cyclic hexapeptide core of mannopeptimycin, but the synthesis of this residue is far from clear. We report here on the reaction order and the stereochemical course of reaction in the formation of (2S,3S)-beta-methylphenylalanine. The reaction is executed by the enzymes MppJ and TyrB, an S-adenosyl methionine (SAM)-dependent methyltransferase and an (S)-aromatic-amino-acid aminotransferase, respectively. Phenylpyruvic acid is methylated by MppJ at its benzylic position at the expense of one equivalent of SAM. The resulting beta-methyl phenylpyruvic acid is then converted to (2S,3S)-beta-methylphenylalanine by TyrB. MppJ was further determined to be regioselective and stereoselective in its catalysis of the formation of (3S)-beta-methylphenylpyruvic acid. The binding constant (K(D)) of MppJ versus SAM is 26 microM. The kinetic constants with respect to k(cat Ppy) and K(M Ppy), and k(cat SAM) and K(M SAM) are 0.8 s(-1) and 2.5 mM, and 8.15 s(-1) and 0.014 mM, respectively. These results suggest SAM has higher binding affinity for MppJ than Ppy, and the C--C bond formation in betamPpy might be the rate-limiting step, as opposed to the C--S bond breakage in SAM. << Less
ChemBioChem 10:2480-2487(2009) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.