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Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides

[Image: see text] Tyrosine-based dipeptides self-assemble to form higher order structures. To gain insights into the nature of intermolecular interactions contributing to the early stages of the self-assembly of aromatic dipeptides, we study the dimers of linear dityrosine (YY) and tryptophan–tyrosi...

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Autores principales: Mayes, Maricris L., Perreault, Lisa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648619/
https://www.ncbi.nlm.nih.gov/pubmed/31459367
http://dx.doi.org/10.1021/acsomega.8b02934
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author Mayes, Maricris L.
Perreault, Lisa
author_facet Mayes, Maricris L.
Perreault, Lisa
author_sort Mayes, Maricris L.
collection PubMed
description [Image: see text] Tyrosine-based dipeptides self-assemble to form higher order structures. To gain insights into the nature of intermolecular interactions contributing to the early stages of the self-assembly of aromatic dipeptides, we study the dimers of linear dityrosine (YY) and tryptophan–tyrosine (WY) using quantum-chemical methods with dispersion corrections and universal solvation model based on density in combination with energy decomposition and natural bond orbital (NBO) analyses. We find that hydrogen bonding is a dominant stabilizing force. The lowest energy structure for the linear YY dimer is characterized by O(carboxyl)···H(O)(tyr). In contrast, the lowest energy dimer of linear WY is stabilized by O(carboxyl)···H(N)(trp) and π(tyr)···π(tyr). The solvent plays a critical role as it can change the strength and nature of interactions. The lowest energy for linear WY dimer in acetone is stabilized by O(carboxyl)···H(O)(tyr), π(trp)···H(C), and π(trp)···H(N). The ΔG of dimerization and stabilization energies of solvated dipeptides reveal that the dipeptide systems are more stable in the solvent phase than in gas phase. NBO confirms increased magnitudes for donor–acceptor interaction for the solvated dipeptides.
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spelling pubmed-66486192019-08-27 Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides Mayes, Maricris L. Perreault, Lisa ACS Omega [Image: see text] Tyrosine-based dipeptides self-assemble to form higher order structures. To gain insights into the nature of intermolecular interactions contributing to the early stages of the self-assembly of aromatic dipeptides, we study the dimers of linear dityrosine (YY) and tryptophan–tyrosine (WY) using quantum-chemical methods with dispersion corrections and universal solvation model based on density in combination with energy decomposition and natural bond orbital (NBO) analyses. We find that hydrogen bonding is a dominant stabilizing force. The lowest energy structure for the linear YY dimer is characterized by O(carboxyl)···H(O)(tyr). In contrast, the lowest energy dimer of linear WY is stabilized by O(carboxyl)···H(N)(trp) and π(tyr)···π(tyr). The solvent plays a critical role as it can change the strength and nature of interactions. The lowest energy for linear WY dimer in acetone is stabilized by O(carboxyl)···H(O)(tyr), π(trp)···H(C), and π(trp)···H(N). The ΔG of dimerization and stabilization energies of solvated dipeptides reveal that the dipeptide systems are more stable in the solvent phase than in gas phase. NBO confirms increased magnitudes for donor–acceptor interaction for the solvated dipeptides. American Chemical Society 2019-01-10 /pmc/articles/PMC6648619/ /pubmed/31459367 http://dx.doi.org/10.1021/acsomega.8b02934 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Mayes, Maricris L.
Perreault, Lisa
Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title_full Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title_fullStr Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title_full_unstemmed Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title_short Probing the Nature of Noncovalent Interactions in Dimers of Linear Tyrosine-Based Dipeptides
title_sort probing the nature of noncovalent interactions in dimers of linear tyrosine-based dipeptides
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648619/
https://www.ncbi.nlm.nih.gov/pubmed/31459367
http://dx.doi.org/10.1021/acsomega.8b02934
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