Constant pH molecular dynamics of proteins in explicit solvent with proton tautomerism
dc.contributor.author | Goh, Garrett B. | en_US |
dc.contributor.author | Hulbert, Benjamin S. | en_US |
dc.contributor.author | Zhou, Huiqing | en_US |
dc.contributor.author | Brooks, Charles L. | en_US |
dc.date.accessioned | 2014-07-03T14:41:23Z | |
dc.date.available | WITHHELD_13_MONTHS | en_US |
dc.date.available | 2014-07-03T14:41:23Z | |
dc.date.issued | 2014-07 | en_US |
dc.identifier.citation | Goh, Garrett B.; Hulbert, Benjamin S.; Zhou, Huiqing; Brooks, Charles L. (2014). "Constant pH molecular dynamics of proteins in explicit solvent with proton tautomerism." Proteins: Structure, Function, and Bioinformatics 82(7): 1319-1331. | en_US |
dc.identifier.issn | 0887-3585 | en_US |
dc.identifier.issn | 1097-0134 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/107513 | |
dc.description.abstract | pH is a ubiquitous regulator of biological activity, including protein‐folding, protein‐protein interactions, and enzymatic activity. Existing constant pH molecular dynamics (CPHMD) models that were developed to address questions related to the pH‐dependent properties of proteins are largely based on implicit solvent models. However, implicit solvent models are known to underestimate the desolvation energy of buried charged residues, increasing the error associated with predictions that involve internal ionizable residue that are important in processes like hydrogen transport and electron transfer. Furthermore, discrete water and ions cannot be modeled in implicit solvent, which are important in systems like membrane proteins and ion channels. We report on an explicit solvent constant pH molecular dynamics framework based on multi‐site λ‐dynamics (CPHMD MSλD ). In the CPHMD MSλD framework, we performed seamless alchemical transitions between protonation and tautomeric states using multi‐site λ‐dynamics, and designed novel biasing potentials to ensure that the physical end‐states are predominantly sampled. We show that explicit solvent CPHMD MSλD simulations model realistic pH‐dependent properties of proteins such as the Hen‐Egg White Lysozyme (HEWL), binding domain of 2‐oxoglutarate dehydrogenase (BBL) and N‐terminal domain of ribosomal protein L9 (NTL9), and the p K a predictions are in excellent agreement with experimental values, with a RMSE ranging from 0.72 to 0.84 p K a units. With the recent development of the explicit solvent CPHMD MSλD framework for nucleic acids, accurate modeling of pH‐dependent properties of both major class of biomolecules—proteins and nucleic acids is now possible. Proteins 2014; 82:1319–1331. © 2013 Wiley Periodicals, Inc. | en_US |
dc.publisher | Wiley Periodicals, Inc. | en_US |
dc.subject.other | Protein Electrostatics | en_US |
dc.subject.other | λ‐Dynamics | en_US |
dc.subject.other | PH | en_US |
dc.subject.other | CPHMD | en_US |
dc.subject.other | Protein Dynamics | en_US |
dc.subject.other | Explicit Solvent | en_US |
dc.subject.other | P K a Values | en_US |
dc.subject.other | Molecular Dynamics | en_US |
dc.title | Constant pH molecular dynamics of proteins in explicit solvent with proton tautomerism | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Biological Chemistry | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/107513/1/prot24499-sup-0002-suppinfo02.pdf | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/107513/2/prot24499-sup-0001-suppinfo01.pdf | |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/107513/3/prot24499.pdf | |
dc.identifier.doi | 10.1002/prot.24499 | en_US |
dc.identifier.source | Proteins: Structure, Function, and Bioinformatics | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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