1
|
Guo C, Gavrilov Y, Gupta S, Bendikov T, Levy Y, Vilan A, Pecht I, Sheves M, Cahen D. Electron transport via tyrosine-doped oligo-alanine peptide junctions: role of charges and hydrogen bonding. Phys Chem Chem Phys 2022; 24:28878-28885. [PMID: 36441625 DOI: 10.1039/d2cp02807g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A way of modulating the solid-state electron transport (ETp) properties of oligopeptide junctions is presented by charges and internal hydrogen bonding, which affect this process markedly. The ETp properties of a series of tyrosine (Tyr)-containing hexa-alanine peptides, self-assembled in monolayers and sandwiched between gold electrodes, are investigated in response to their protonation state. Inserting a Tyr residue into these peptides enhances the ETp carried via their junctions. Deprotonation of the Tyr-containing peptides causes a further increase of ETp efficiency that depends on this residue's position. Combined results of molecular dynamics simulations and spectroscopic experiments suggest that the increased conductance upon deprotonation is mainly a result of enhanced coupling between the charged C-terminus carboxylate group and the adjacent Au electrode. Moreover, intra-peptide hydrogen bonding of the Tyr hydroxyl to the C-terminus carboxylate reduces this coupling. Hence, the extent of such a conductance change depends on the Tyr-carboxylate distance in the peptide's sequence.
Collapse
Affiliation(s)
- Cunlan Guo
- Departments of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 761001, Israel. .,College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yulian Gavrilov
- Departments of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, 761001, Israel.,Division of Biophysical Chemistry, Center for Molecular Protein Science, Department of Chemistry, Lund University, SE-22100 Lund, Sweden
| | - Satyajit Gupta
- Departments of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 761001, Israel. .,Department of Chemistry, Indian Institute of Technology, Bhilai, 492015, India
| | - Tatyana Bendikov
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot, 761001, Israel
| | - Yaakov Levy
- Departments of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, 761001, Israel
| | - Ayelet Vilan
- Departments of Chemical & Biological Physics, Weizmann Institute of Science, Rehovot, 761001, Israel
| | - Israel Pecht
- Department of immunology and Regenerative Biology, Weizmann Institute of Science, Rehovot, 761001, Israel
| | - Mordechai Sheves
- Departments of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 761001, Israel.
| | - David Cahen
- Departments of Molecular Chemistry and Materials Science, Weizmann Institute of Science, Rehovot, 761001, Israel.
| |
Collapse
|
2
|
Manna S, Ruano CSM, Hegenbarth JC, Vaiman D, Gupta S, McCarthy FP, Méhats C, McCarthy C, Apicella C, Scheel J. Computational Models on Pathological Redox Signalling Driven by Pregnancy: A Review. Antioxidants (Basel) 2022; 11:585. [PMID: 35326235 PMCID: PMC8945226 DOI: 10.3390/antiox11030585] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 02/04/2023] Open
Abstract
Oxidative stress is associated with a myriad of diseases including pregnancy pathologies with long-term cardiovascular repercussions for both the mother and baby. Aberrant redox signalling coupled with deficient antioxidant defence leads to chronic molecular impairment. Abnormal placentation has been considered the primary source for reactive species; however, placental dysfunction has been deemed secondary to maternal cardiovascular maladaptation in pregnancy. While various therapeutic interventions, aimed at combating deregulated oxidative stress during pregnancy have shown promise in experimental models, they often result as inconclusive or detrimental in clinical trials, warranting the need for further research to identify candidates. The strengths and limitations of current experimental methods in redox research are discussed. Assessment of redox status and oxidative stress in experimental models and in clinical practice remains challenging; the state-of-the-art of computational models in this field is presented in this review, comparing static and dynamic models which provide functional information such as protein-protein interactions, as well as the impact of changes in molecular species on the redox-status of the system, respectively. Enhanced knowledge of redox biology in during pregnancy through computational modelling such as generation of Systems Biology Markup Language model which integrates existing models to a larger network in the context of placenta physiology.
Collapse
Affiliation(s)
- Samprikta Manna
- Department of Obstetrics and Gynaecology, Cork University Maternity Hospital, University College Cork, T12 YE02 Cork, Ireland;
| | - Camino S. M. Ruano
- Institut Cochin, Inserm U1016, UMR8104 CNRS, Université de Paris, 75014 Paris, France; (C.S.M.R.); (D.V.); (C.M.); (C.A.)
| | - Jana-Charlotte Hegenbarth
- Department of Molecular Genetics, Faculty of Science and Engineering, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6211 KH Maastricht, The Netherlands;
- Department of Cardiology, CARIM School for Cardiovascular Diseases, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6229 ER Maastricht, The Netherlands
| | - Daniel Vaiman
- Institut Cochin, Inserm U1016, UMR8104 CNRS, Université de Paris, 75014 Paris, France; (C.S.M.R.); (D.V.); (C.M.); (C.A.)
| | - Shailendra Gupta
- Department of Systems Biology and Bioinformatics, Rostock University, 18051 Rostock, Germany; (S.G.); (J.S.)
| | - Fergus P. McCarthy
- Department of Obstetrics and Gynaecology, Cork University Maternity Hospital, University College Cork, T12 YE02 Cork, Ireland;
| | - Céline Méhats
- Institut Cochin, Inserm U1016, UMR8104 CNRS, Université de Paris, 75014 Paris, France; (C.S.M.R.); (D.V.); (C.M.); (C.A.)
| | - Cathal McCarthy
- Department of Pharmacology and Therapeutics, Western Gateway Building, University College Cork, T12 K8AF Cork, Ireland;
| | - Clara Apicella
- Institut Cochin, Inserm U1016, UMR8104 CNRS, Université de Paris, 75014 Paris, France; (C.S.M.R.); (D.V.); (C.M.); (C.A.)
| | - Julia Scheel
- Department of Systems Biology and Bioinformatics, Rostock University, 18051 Rostock, Germany; (S.G.); (J.S.)
| |
Collapse
|
3
|
Li C, Mora L, Toldrá F. Structure-function relationship of small peptides generated during the ripening of Spanish dry-cured ham: Peptidome, molecular stability and computational modelling. Food Chem 2021; 375:131673. [PMID: 34872792 DOI: 10.1016/j.foodchem.2021.131673] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 10/22/2021] [Accepted: 11/21/2021] [Indexed: 11/30/2022]
Abstract
A systematic insight into the structure-function properties of small bioactive peptides is of great importance. Herein, peptidomics and computational methodology were adopted to investigate the stabilization patterns and building blocks of antioxidant peptides resulting from proteolysis during the ripening of Spanish dry-cured ham (9-24 months of processing). The results showed that native peptides underwent manufacture-induced steric/redox stress, while homogeneous/heterogeneous p-π/π-π interaction significantly improved the ABTS+ inhibition activity of hydrophobic peptides. However, for more hydrophilic peptides, the intrinsic π-interaction system (i.e., cation-π and π-π packing) substantially interfered with ABTS+/DPPH scavenging events when compared to the aromatic residues. Semi-quantitative peptidomics and molecular simulation/docking revealed that VFSSQGQSELILLQK and LCPSPDGLYL are two potential antioxidant peptides at the late ripening-drying. They had distinctive self-folding destinies following solvation owing to varying charged/hydrophobic properties of termini and hydrogen atom donor, allowing different flexibility of backbone and interactive surface towards free radicals ex situ followed by electron/proton transfer.
Collapse
Affiliation(s)
- Chengliang Li
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Avenue Agustín Escardino 7, 46980 Paterna (Valencia), Spain
| | - Leticia Mora
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Avenue Agustín Escardino 7, 46980 Paterna (Valencia), Spain
| | - Fidel Toldrá
- Instituto de Agroquímica y Tecnología de Alimentos (IATA-CSIC), Avenue Agustín Escardino 7, 46980 Paterna (Valencia), Spain.
| |
Collapse
|
4
|
Horsley JR, Wang X, Yu J, Abell AD. Exploiting conformationally gated electron transfer in self-assembled azobenzene-containing cyclic peptides using light. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|