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Improved Treatment of Ligands and Coupling Effects in Empirical Calculation and Rationalization of p Ka Values

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Søndergaard, Chresten R., Olsson, Mats H. M., Rostkowski, Michał, Jensen, Jan H.·2011·Journal of Chemical Theory and Computation
DOI 10.1021/ct200133y
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Abstract

The new empirical rules for protein pKa predictions implemented in the PROPKA3.0 software package (Olsson et al. J. Chem. Theory Comput.2010, 7, 525-537) have been extended to the prediction of pKa shifts of active site residues and ionizable ligand groups in protein-ligand complexes. We present new algorithms that allow pKa shifts due to inductive (i.e., covalently coupled) intraligand interactions, as well as noncovalently coupled interligand interactions in multiligand complexes, to be included in the prediction. The number of different ligand chemical groups that are automatically recognized has been increased to 18, and the general implementation has been changed so that new functional groups can be added easily by the user, aided by a new and more general protonation scheme. Except for a few cases, the new algorithms in PROPKA3.1 are found to yield results similar to or better than those obtained with PROPKA2.0 (Bas et al. Proteins: Struct., Funct., Bioinf.2008, 73, 765-783). Finally, we present a novel algorithm that identifies noncovalently coupled ionizable groups, where pKa prediction may be especially difficult. This is a general improvement to PROPKA and is applied to proteins with and without ligands.

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Metadata

Authors
Søndergaard, C. R., Olsson, M. H. M., Rostkowski, M., & Jensen, J. H.
Venue
Journal of Chemical Theory and Computation
Publisher
American Chemical Society (ACS)
Published
2011-06-09
Volume
7
Issue
7
Pages
2284-2295
ISSN
  • 1549-9618 (ISSN-L)
  • 1549-9626
DOI
10.1021/ct200133y
OpenAlex
W2327581403
Cited by
1,929
References
1
FWCI
14.58
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: Improved Treatment of Ligands and Coupling Effects in Empirical Calculation and Rationalization of p Ka Values. https://app.cochat.ai/papers/10.1021/ct200133y
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Søndergaard, C. R., Olsson, M. H. M., Rostkowski, M., & Jensen, J. H. (2011). Improved Treatment of Ligands and Coupling Effects in Empirical Calculation and Rationalization of p Ka Values. Journal of Chemical Theory and Computation. https://doi.org/10.1021/ct200133y

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