Abstract
A series of theoretical approaches, including conventional FF03 and FF03-based polarization model, as well as the generalized energy-based fragmentation (GEBF) quantum chemistry method, have been applied to investigate the interactions between acetate ion (CH3COO−) and the α-subunit of human adult hemoglobin (designated as Hb-α) at four binding sites (Lys16, Lys90, Arg92, and Lys127), respectively. The FF03-based polarizable force fields show that the interaction energies between the CH3COO− group and Hb-α follow the trend of Arg92 > Lys127 > Lys90 > Lys16. The complexation of CH3COO− with Hb-α is governed by the long-range electrostatic interactions and steric effect.
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Supported by the National Natural Science Foundation of China (Grant No. 20825312), National Basic Research Program (Grant No. 2004CB719901), and the Fok Ying Tong Education Foundation (Grant No. 111013)
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Yan, X., Jiang, N. & Ma, J. Theoretical study of interactions between human adult hemoglobin and acetate ion by polarizable force field and fragmentation quantum chemistry methods. Sci. China Ser. B-Chem. 52, 1925–1931 (2009). https://doi.org/10.1007/s11426-009-0273-y
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DOI: https://doi.org/10.1007/s11426-009-0273-y