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• W2157225928 abstract "Noncovalent interactions of the polyhedral carborane 1-carba-closo-dodecaborane (CB(11)H(12))(-) with building blocks of biomolecules, modelled by glycine (GLY), serine (SER), phenylalanine (PHE), glutamic acid (GLU), lysine (LYS) and arginine (ARG), were investigated in vacuo by molecular dynamics simulations with the UFF empirical potential. Selected structures were further studied by accurate ab initio quantum chemical procedures. Interactions with a peptide bond (GLY-SER dipeptide) and a nucleic acid building block (guanine) were also considered. The RESP and NPA charges of carboranes and small model systems are compared and their use is discussed. The dominant interaction between carboranes and biomolecules is the formation of unconventional proton-hydride hydrogen bonds (dihydrogen bonds) characterized by a short distance between hydrogen atoms (as close as 1.8 A) and an average strength in the range of 4.2-5.8 kcal mol(-1). The total stabilization energy of complexes investigated is rather large, and the largest value (approximately 15 kcal mol(-1)) was found for the carborane complexes with ARG and the GLY-SER dipeptide. These interactions are ubiquitous under geometrical constraints influencing the strength of the interaction. The carborane forms dihydrogen bonds with biomolecules preferably with the hydrogen atoms of its lower hemisphere (i.e. the part of the cage opposite to the carbon atom). These two geometrical factors can be used to explain the specificity of inhibition of HIV protease by carboranes." @default.
• W2157225928 created "2016-06-24" @default.
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• W2157225928 date "2006-05-03" @default.
• W2157225928 modified "2023-10-10" @default.
• W2157225928 title "Interaction of Carboranes with Biomolecules: Formation of Dihydrogen Bonds" @default.
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• W2157225928 doi "https://doi.org/10.1002/cphc.200500648" @default.
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• W2157225928 hasPublicationYear "2006" @default.
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