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- W2024882281 abstract "The interconversion of (S)-glutamate and (2S,3S)-3-methylaspartate catalyzed by B12-dependent glutamate mutase is discussed using results from high-level ab initio molecular orbital calculations. Evidence is presented regarding the possible role of coenzyme-B12 in substrate activation and product formation via radical generation. Calculated electron paramagnetic resonance parameters support experimental evidence for the involvement of substrate-derived radicals and will hopefully aid the future detection of other important radical intermediates. The height of the rearrangement barrier for a fragmentation−recombination pathway, calculated with a model that includes neutral amino and carboxylic acid substituents in the migrating glycyl group, supports recent experimental evidence for the interconversion of (S)-glutamate and (2S,3S)-3-methylaspartate through such a pathway. Our calculations suggest that the enzyme may facilitate the rearrangement of (S)-glutamate through (partial) proton-transfer processes that control the protonation state of substituents in the migrating group." @default.
- W2024882281 created "2016-06-24" @default.
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- W2024882281 date "2001-07-27" @default.
- W2024882281 modified "2023-10-16" @default.
- W2024882281 title "Interconversion of (<i>S</i>)-Glutamate and (2<i>S</i>,3<i>S</i>)-3-Methylaspartate: A Distinctive B<sub>12</sub>-Dependent Carbon-Skeleton Rearrangement" @default.
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- W2024882281 doi "https://doi.org/10.1021/ja004246f" @default.
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