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• W1969884384 endingPage "966" @default.
• W1969884384 startingPage "951" @default.
• W1969884384 abstract "Methods for estimation of pKa values of residues in proteins were tested on a set of benchmark proteins with experimentally known pKa values. The benchmark set includes 80 different residues (20 each for Asp, Glu, Lys, and His), half of which consists of significantly variant cases (ΔpKa ≥ 1 pKa unit from the amino acid in solution). The method introduced by Case and co-workers [J. Am. Chem. Soc. 2004, 126, 4167−4180], referred to as the molecular dynamics/generalized-Born/thermodynamic integration (MD/GB/TI) technique, gives a root-mean-square deviation (rmsd) of 1.4 pKa units on the benchmark set. The use of explicit waters in the immediate region surrounding the residue was shown to generally reduce high errors for this method. Longer simulation time was also shown to increase the accuracy of this method. The empirical approach developed by Jensen and co-workers [Proteins 2005, 61, 704−721], PROPKA, also gives an overall rmsd of 1.4 pKa units and is more or less accurate based on residue type—the method does very well for Lys and Glu, but less so for Asp and His. Likewise, the absolute deviation is quite similar for the two methods—5.2 for PROPKA and 5.1 for MD/GB/TI. A comparison of these results with several prediction methods from the literature is presented. The error in pKa prediction is analyzed as a function of variation of the pKa from that in water and the solvent accessible surface area (SASA) of the residue. A case study of the catalytic lysine residue in 2-deoxyribose-5-phosphate aldolase (DERA) is also presented." @default.
• W1969884384 created "2016-06-24" @default.
• W1969884384 creator A5004634976 @default.
• W1969884384 creator A5042178740 @default.
• W1969884384 date "2008-05-09" @default.
• W1969884384 modified "2023-09-23" @default.
• W1969884384 title "Benchmarking p<i>K</i>_a Prediction Methods for Residues in Proteins" @default.
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• W1969884384 doi "https://doi.org/10.1021/ct8000014" @default.

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