EC Number | Activating Compound | Comment | Organism | Structure |
---|---|---|---|---|
4.1.1.23 | HPO32- | decarboxylation of substrate analog 5'-deoxy-5-fluoroorotidine is activated. Decarboxylation of truncated substrate analog 1-(beta-D-erythrofuranosyl)-5-fluoroorotic acid is activated by exogenous phosphite dianion, but the 5-F substituent results in only a 0.8 kcal stabilization of the transition state for the phosphite-activated reaction | Saccharomyces cerevisiae |
EC Number | Organism | UniProt | Comment | Textmining |
---|---|---|---|---|
4.1.1.23 | Saccharomyces cerevisiae | - |
- |
- |
EC Number | Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|---|
4.1.1.23 | 1-(beta-D-erythrofuranosyl)-5-fluoroorotic acid | truncated analog of the natural substrate orotidine 5'-monophosphate with enhanced reactivity towards decarboxylation. The vinyl carbanion-like transition state is stabilized by 3.5 kcal/mol by interactions with the 5-F substituent. Decarboxylation is activated by exogenous phosphite dianion, but the 5-F substituent results in only a 0.8 kcal stabilization of the transition state for the phosphite-activated reaction | Saccharomyces cerevisiae | 1-(beta-D-erythrofuranosyl)-5-fluorouracil + CO2 | - |
? | |
4.1.1.23 | 5'-deoxy-5-fluoroorotidine | truncated analog of the natural substrate orotidine 5'-monophosphate with enhanced reactivity towards decarboxylation. The 4'-CH3 and 4'-CH2OH groups of 5'-deoxy-5-fluoroorotidine and orotidine, respectively, result in identical destabilizations of the transition state for the unactivated decarboxylation of 2.9 kcal/mol. By contrast, the 4'-CH3 group of 5'-deoxy-5-fluoroorotidine and the 4'-CH2OH group of orotidine result in very different 4.7 and 8.3 kcal/mol destabilizations of the transition state for the phosphite-activated decarboxylation | Saccharomyces cerevisiae | ? + CO2 | - |
? |