Journal of molecular modeling, 18(8), 3523-3533 (2012-02-14)
The consequences of one-electron oxidation and one-electron reduction were studied for 4-aminopyrimidine (4APM), which displays prototropic tautomerism. Since experimental techniques are incapable of detecting less than 0.1% of minor tautomers, quantum-chemical calculations [DFT(B3LYP)/6-311+G(d,p)] were carried out for all possible tautomers
Potential roles of the aminopyrimidine ring in thiamin catalyzed reactions.
F Jordan et al.
Annals of the New York Academy of Sciences, 378, 14-31 (1982-01-01)
Journal of the American Chemical Society, 132(24), 8261-8263 (2010-06-02)
Nonadiabatic photodynamical simulations of 4-aminopyrimidine (4-APy) used as a model for adenine were performed by embedding it between two stacking methyl-guanine (mGua) molecules to determine the effect of spatial restrictions on the ultrafast photodeactivation mechanism of this nucleobase. A hybrid
Biochimica et biophysica acta, 1385(2), 245-250 (1998-07-10)
Ab initio calculations on the HF-SCF 6-31g* level were performed on tautomers as well as protonated and deprotonated species of thiamin. Aspects of the proton relay function of the 4'-aminopyrimidine ring in the thiamin catalysis were studied on model systems.
Biochimica et biophysica acta, 1385(2), 177-186 (1998-07-10)
The mechanism of ThDP enzymes originates in the anionic (ylid) structure of the coenzyme. On the other hand, no ylid species (as permanently existing structure) could be detected by 13C2-NMR studies with PDC (yeast), when the cofactor binds to the
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