1
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Guryanov I, Korzhikov-Vlakh V, Bhattacharya M, Biondi B, Masiero G, Formaggio F, Tennikova T, Urtti A. Conformationally Constrained Peptides with High Affinity to the Vascular Endothelial Growth Factor. J Med Chem 2021; 64:10900-10907. [PMID: 34269584 DOI: 10.1021/acs.jmedchem.1c00219] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The design of efficient vascular endothelial growth factor (VEGF) inhibitors is a high-priority research area aimed at the treatment of pathological angiogenesis. Among other compounds, v114* has been identified as a potent VEGF-binding peptide. In order to improve the affinity to VEGF, we built a conformational constrain in its structure. To this aim, Cα-tetrasubstituted amino acid Aib was introduced into the N-terminal tail, peptide loop, or C-terminal helix. NMR studies confirmed the stabilization of the helical conformation in proximity to the Aib residue. We found that the induction of the N-terminal helical structure or stabilization of the C-terminal helix can noticeably increase the peptide affinity to the VEGF. These peptides efficiently inhibited VEGF-stimulated cell proliferation as well. The insertion of the non-proteinogenic Aib residue significantly enhanced the stability of the peptides in the vitreous environment. Thus, these Aib-containing peptides are promising candidates for the design of VEGF inhibitors with improved properties.
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Affiliation(s)
- Ivan Guryanov
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, Peterhof, St. Petersburg 198504, Russia
| | - Viktor Korzhikov-Vlakh
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, Peterhof, St. Petersburg 198504, Russia
| | - Madhushree Bhattacharya
- Division of Pharmaceutical Biosciences, University of Helsinki, Viikinkaari 5 E, Helsinki 00014, Finland
| | - Barbara Biondi
- ICB, Padova Unit, CNR, Department of Chemistry, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Giulia Masiero
- ICB, Padova Unit, CNR, Department of Chemistry, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Fernando Formaggio
- ICB, Padova Unit, CNR, Department of Chemistry, University of Padova, via Marzolo 1, Padova 35131, Italy
| | - Tatiana Tennikova
- Institute of Chemistry, St. Petersburg State University, Universitetsky pr. 26, Peterhof, St. Petersburg 198504, Russia
| | - Arto Urtti
- Division of Pharmaceutical Biosciences, University of Helsinki, Viikinkaari 5 E, Helsinki 00014, Finland.,School of Pharmacy, University of Eastern Finland, Yliopistonranta 1 C, Kuopio 70211, Finland
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2
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Biondi B, Cardena R, Bisello A, Schiesari R, Cerveson L, Facci M, Rancan M, Formaggio F, Santi S. Flat, Ferrocenyl‐Conjugated Peptides: A Combined Electrochemical and Spectroscopic Study. ChemElectroChem 2021. [DOI: 10.1002/celc.202100597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Barbara Biondi
- Institute of Biomolecular Chemistry Padova Unit, CNR via Marzolo 1 35131 Padova Italy
| | - Roberta Cardena
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Annalisa Bisello
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Renato Schiesari
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Laura Cerveson
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Martino Facci
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Marzio Rancan
- Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), CNR Via Marzolo, 1 35131 Padova Italy
| | - Fernando Formaggio
- Institute of Biomolecular Chemistry Padova Unit, CNR via Marzolo 1 35131 Padova Italy
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
| | - Saverio Santi
- Department of Chemical Sciences University of Padova via Marzolo 1 35131 Padova Italy
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3
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Derr JB, Rybicka-Jasińska K, Espinoza EM, Morales M, Billones MK, Clark JA, Vullev VI. On the Search of a Silver Bullet for the Preparation of Bioinspired Molecular Electrets with Propensity to Transfer Holes at High Potentials. Biomolecules 2021; 11:429. [PMID: 33804209 PMCID: PMC8001849 DOI: 10.3390/biom11030429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/01/2021] [Accepted: 03/07/2021] [Indexed: 01/24/2023] Open
Abstract
Biological structure-function relationships offer incomparable paradigms for charge-transfer (CT) science and its implementation in solar-energy engineering, organic electronics, and photonics. Electrets are systems with co-directionally oriented electric dopes with immense importance for CT science, and bioinspired molecular electrets are polyamides of anthranilic-acid derivatives with designs originating from natural biomolecular motifs. This publication focuses on the synthesis of molecular electrets with ether substituents. As important as ether electret residues are for transferring holes under relatively high potentials, the synthesis of their precursors presents formidable challenges. Each residue in the molecular electrets is introduced as its 2-nitrobenzoic acid (NBA) derivative. Hence, robust and scalable synthesis of ether derivatives of NBA is essential for making such hole-transfer molecular electrets. Purdie-Irvine alkylation, using silver oxide, produces with 90% yield the esters of the NBA building block for iso-butyl ether electrets. It warrants additional ester hydrolysis for obtaining the desired NBA precursor. Conversely, Williamson etherification selectively produces the same free-acid ether derivative in one-pot reaction, but a 40% yield. The high yields of Purdie-Irvine alkylation and the selectivity of the Williamson etherification provide important guidelines for synthesizing building blocks for bioinspired molecular electrets and a wide range of other complex ether conjugates.
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Affiliation(s)
- James Bennett Derr
- Department of Biochemistry, University of California, Riverside, CA 92521, USA;
| | | | - Eli Misael Espinoza
- Department of Chemistry, University of California, Riverside, CA 92521, USA; (E.M.E.); (M.M.)
| | - Maryann Morales
- Department of Chemistry, University of California, Riverside, CA 92521, USA; (E.M.E.); (M.M.)
| | | | - John Anthony Clark
- Department of Bioengineering, University of California, Riverside, CA 92521, USA; (K.R.-J.); (J.A.C.)
| | - Valentine Ivanov Vullev
- Department of Biochemistry, University of California, Riverside, CA 92521, USA;
- Department of Bioengineering, University of California, Riverside, CA 92521, USA; (K.R.-J.); (J.A.C.)
- Department of Chemistry, University of California, Riverside, CA 92521, USA; (E.M.E.); (M.M.)
- Department of Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA
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4
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Song X, Bu Y. Electric field controlled uphill electron migration along α-helical oligopeptides. Phys Chem Chem Phys 2021; 23:1464-1474. [PMID: 33399139 DOI: 10.1039/d0cp05085g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A systematic study on applied electric field effects (Eapp) on electron transfer along the peptides is very important for the regulation of electron transfer behaviors so as to realize the functions of proteins. In this work, we computationally investigated the uphill migration behaviors of excess electrons along the peptide chains under Eapp using the density functional theory method. We examined the electronic property changes of the model α-helical oligopeptides, the dynamics behavior of an excess electron along the peptide chains under Eapp opposite to the internal dipole field of peptides. We found that Eapp of different intensities can effectively modulate the electron-binding abilities, Frontier molecular orbital (FMO) energies and distributions, dipole moments and other corresponding properties with different degrees. The electron-binding abilities of α-helical oligopeptides revealed by vertical electron affinity and FMO energies decrease in weak Eapp and then increase greatly in high Eapp, while the dipole moments change mildly in weak Eapp and increase significantly until a threshold and then become gentle in high Eapp. Analysis of FMO and electron distributions indicates that an excess electron can migrate uphill from the N-terminus to the C-terminus of the α-helical peptides in an irregular jump mode as Eapp linearly increases. Another interesting finding is that α-helical peptides with diverse chain lengths have different sensitivities to Eapp. The longer the peptide is, the more obvious the effects of Eapp are. Additionally, compared to the Eapp effect on linear oligopeptides, we summarized the systematic rule about the Eapp effect on excess electron migration uphill along the peptide chains. Clearly, this work not only enriches the information of the Eapp effect on electronic properties and electron transfers in the helical peptides, but also provides a new perspective for modulating electron migration behaviors in protein electronics engineering.
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Affiliation(s)
- Xiufang Song
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
| | - Yuxiang Bu
- School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
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5
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Zuliani C, Formaggio F, Scipionato L, Toniolo C, Antonello S, Maran F. Insights into the Distance Dependence of Electron Transfer through Conformationally Constrained Peptides. ChemElectroChem 2020. [DOI: 10.1002/celc.202000088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Claudio Zuliani
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
- Ozo Innovations Ltd, Unit 29 Chancerygate Business Centre Langford Ln Kidlington OX5 1FQ UK
| | - Fernando Formaggio
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
| | - Laura Scipionato
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
| | - Claudio Toniolo
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
| | - Sabrina Antonello
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
| | - Flavio Maran
- Department of ChemistryUniversity of Padova 1, Via Marzolo 35131 Padova Italy
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6
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Chen Y, Viereck J, Harmer R, Rangan S, Bartynski RA, Galoppini E. Helical Peptides Design for Molecular Dipoles Functionalization of Wide Band Gap Oxides. J Am Chem Soc 2020; 142:3489-3498. [PMID: 31977205 DOI: 10.1021/jacs.9b12001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The use of helical hexapeptides to establish a surface dipole layer on a TiO2 substrate, with the goal of influencing the energy levels of a coadsorbed chromophore, is explored. Two helical hexapeptides, synthesized from 2-amino isobutyric acid (Aib) residues, were protected at the N-terminus with a carboxybenzyl group (Z) and at the C-terminus carried either a carboxylic acid or an isophthalic acid (Ipa) anchor group to form Z-(Aib)6-COOH or Z-(Aib)6-Ipa, respectively. Using a combination of vibrational and photoemission spectroscopies, bonding of the two peptides to TiO2 surfaces (either nanostructured or single-crystal TiO2(110)) was found to be highly dependent on the anchor group, with Ipa establishing a monolayer much more efficiently than COOH. Furthermore, a monolayer of Z-(Aib)6-Ipa on TiO2(110) was exposed for different binding times to a solution of a zinc tetraphenylporphyrin (ZnTPP) derivative terminated with an Ipa anchor group (ZnTPP-P-Ipa). Photoemission spectroscopy revealed that ZnTPP-P-Ipa partly displaced Z-(Aib)6-Ipa, forming a coadsorbed monolayer on the oxide surface. The presence of the peptide molecular dipole shifted the HOMO levels of the ZnTPP group to lower energy by ∼300 meV, in accordance with a simple parallel plate capacitor model. These results suggest that a mixed-layer approach, involving coadsorption of a strong molecular dipole compound with a chromophore, is a versatile method to shift the energy levels of such chromophores with respect to the band edges of the substrate.
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Affiliation(s)
- Yuan Chen
- Chemistry Department , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
| | - Jonathan Viereck
- Department of Physics and Astronomy and Laboratory for Surface Modification , Rutgers University , 136 Frelinghuysen Road , Piscataway , New Jersey 08854 , United States
| | - Ryan Harmer
- Chemistry Department , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
| | - Sylvie Rangan
- Department of Physics and Astronomy and Laboratory for Surface Modification , Rutgers University , 136 Frelinghuysen Road , Piscataway , New Jersey 08854 , United States
| | - Robert A Bartynski
- Department of Physics and Astronomy and Laboratory for Surface Modification , Rutgers University , 136 Frelinghuysen Road , Piscataway , New Jersey 08854 , United States
| | - Elena Galoppini
- Chemistry Department , Rutgers University , 73 Warren Street , Newark , New Jersey 07102 , United States
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7
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Derr JB, Tamayo J, Espinoza EM, Clark JA, Vullev VI. Dipole-induced effects on charge transfer and charge transport. Why do molecular electrets matter? CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0389] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Charge transfer (CT) and charge transport (CTr) are at the core of life-sustaining biological processes and of processes that govern the performance of electronic and energy-conversion devices. Electric fields are invaluable for guiding charge movement. Therefore, as electrostatic analogues of magnets, electrets have unexplored potential for generating local electric fields for accelerating desired CT processes and suppressing undesired ones. The notion about dipole-generated local fields affecting CT has evolved since the middle of the 20th century. In the 1990s, the first reports demonstrating the dipole effects on the kinetics of long-range electron transfer appeared. Concurrently, the development of molecular-level designs of electric junctions has led the exploration of dipole effects on CTr. Biomimetic molecular electrets such as polypeptide helices are often the dipole sources in CT systems. Conversely, surface-charge electrets and self-assembled monolayers of small polar conjugates are the preferred sources for modifying interfacial electric fields for controlling CTr. The multifaceted complexity of such effects on CT and CTr testifies for the challenges and the wealth of this field that still remains largely unexplored. This review outlines the basic concepts about dipole effects on CT and CTr, discusses their evolution, and provides accounts for their future developments and impacts.
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Affiliation(s)
- James B. Derr
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
| | - Jesse Tamayo
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - Eli M. Espinoza
- Department of Chemistry, University of California, Riverside, CA 92521, USA
| | - John A. Clark
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
| | - Valentine I. Vullev
- Department of Biochemistry, University of California, Riverside, CA 92521, USA
- Department of Chemistry, University of California, Riverside, CA 92521, USA
- Department of Bioengineering, University of California, Riverside, CA 92521, USA
- Materials Science and Engineering Program, University of California, Riverside, CA 92521, USA
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8
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Gobbo P, Antonello S, Guryanov I, Polo F, Soldà A, Zen F, Maran F. Dipole Moment Effect on the Electrochemical Desorption of Self-Assembled Monolayers of 310-Helicogenic Peptides on Gold. ChemElectroChem 2016. [DOI: 10.1002/celc.201600573] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pierangelo Gobbo
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Sabrina Antonello
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
| | - Ivan Guryanov
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
- Institute of Chemistry; St. Petersburg State University, 26 Universitetskij Pr.; 198504 Saint-Petersburg Russia
| | - Federico Polo
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
- National Cancer Institute-Centro di Riferimento Oncologico; Via Franco Gallini 2 33081 Aviano Italy
| | - Alice Soldà
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
- Department of Chemistry; University of Bologna; Via Selmi 2 40126 Bologna Italy
| | - Federico Zen
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
- School of Chemistry; Trinity College Dublin, College Green; Dublin 2 Ireland
| | - Flavio Maran
- Department of Chemistry; University of Padova; Via Marzolo 1 35131 Padova Italy
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9
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Donoli A, Marcuzzo V, Moretto A, Crisma M, Toniolo C, Cardena R, Bisello A, Santi S. New bis-ferrocenyl end-capped peptides: synthesis and charge transfer properties. Biopolymers 2016; 100:14-24. [PMID: 23335164 DOI: 10.1002/bip.22197] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 09/26/2012] [Accepted: 10/30/2012] [Indexed: 01/19/2023]
Abstract
In this article, the successful preparation of a new series of 3(10) -helical peptides of different length containing two terminal ferrocenyl (Fc) units and based on the strongly foldameric α-aminoisobutyric (Aib) acid is reported. The synthesis of the Fc-CO-(Aib)(n) -NH-Fc (n = 1-5) homo-peptides was performed by solution methods. Moderate to good yields (26-85%) were obtained in each of the difficult coupling steps of Fc-COOH and the corresponding H-(Aib)(n)-NH-Fc compounds by C-activation with the 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide/7-aza-1-hydroxy-1,2,3-benzotriazole method. Information on the C=O···H-N intramolecularly hydrogen-bonded networks was initially obtained from FT-IR absorption measurements. The N-H stretching (amide A) region allowed us to distinguish which amide protons are involved in intramolecular hydrogen bonds and indicates the formation of an incipient 3(10) -helix structure for peptides containing at least two Aib residues. This conclusion was confirmed by (1)H NMR titrations of the N-H groups of the peptides in CDCl(3) with dimethylsulfoxide and by crystallographic analysis of the N(α) -acylated Fc-CO-(Aib)(5)-NH-Fc pentapeptide amide. The two redox-active Fc groups covalently bound to the termini of the foldameric peptide architectures were used as electrochemical probes. The end-to-end effects of electron holes generated by single and double oxidations were analyzed by means of electrochemical and spectroelectrochemical techniques. The results of these studies indicate that charge transfer across the peptide main chain does occur in the five peptides. In particular, in the pentapeptide 5, charge is transferred through an intramolecular Fe···Fe separation of 14 Å.
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Affiliation(s)
- Alessandro Donoli
- Department of Chemical Sciences, University of Padova, 35131 Padova, Italy
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10
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Uji H, Ito T, Matsumoto M, Kimura S. Prevailing Photocurrent Generation of D−π–A Type Oligo(phenyleneethynylene) in Contact with Gold over Dexter-Type Energy-Transfer Quenching. J Phys Chem A 2016; 120:1190-6. [DOI: 10.1021/acs.jpca.5b12532] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hirotaka Uji
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Taichi Ito
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Mitsuaki Matsumoto
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shunsaku Kimura
- Department of Material Chemistry,
Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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11
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Sepunaru L, Refaely-Abramson S, Lovrinčić R, Gavrilov Y, Agrawal P, Levy Y, Kronik L, Pecht I, Sheves M, Cahen D. Electronic Transport via Homopeptides: The Role of Side Chains and Secondary Structure. J Am Chem Soc 2015; 137:9617-26. [DOI: 10.1021/jacs.5b03933] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lior Sepunaru
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Sivan Refaely-Abramson
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Robert Lovrinčić
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Yulian Gavrilov
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Piyush Agrawal
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Yaakov Levy
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Leeor Kronik
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Israel Pecht
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - Mordechai Sheves
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
| | - David Cahen
- Department of Materials and Interfaces, ‡Department of Organic
Chemistry, §Department of Structural
Biology, and ∥Department of Immunology, Weizmann Institute of Science, Rehovot, 7610001, Israel
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12
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Chitre K, Batarseh A, Kopecky A, Fan H, Tang H, Lalancette R, Bartynski RA, Galoppini E. Synthesis of Zinc Tetraphenylporphyrin Rigid Rods with a Built-In Dipole. J Phys Chem B 2015; 119:7522-30. [DOI: 10.1021/jp5112982] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Keyur Chitre
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Alberto Batarseh
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Andrew Kopecky
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Hao Fan
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Hao Tang
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Roger Lalancette
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
| | - Robert A. Bartynski
- Department
of Physics and Astronomy and Laboratory for Surface Modification, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, United States
| | - Elena Galoppini
- Chemistry
Department, Rutgers University, 73 Warren Street, Newark, New Jersey 07102, United States
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13
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Yu ZL, Casanova-Moreno J, Guryanov I, Maran F, Bizzotto D. Influence of Surface Structure on Single or Mixed Component Self-Assembled Monolayers via in Situ Spectroelectrochemical Fluorescence Imaging of the Complete Stereographic Triangle on a Single Crystal Au Bead Electrode. J Am Chem Soc 2014; 137:276-88. [DOI: 10.1021/ja5104475] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Ivan Guryanov
- Department
of Chemistry, University of Padova, 35122 Padova, Italy
| | - Flavio Maran
- Department
of Chemistry, University of Padova, 35122 Padova, Italy
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14
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Amdursky N, Marchak D, Sepunaru L, Pecht I, Sheves M, Cahen D. Electronic transport via proteins. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:7142-61. [PMID: 25256438 DOI: 10.1002/adma.201402304] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 08/07/2014] [Indexed: 05/25/2023]
Abstract
A central vision in molecular electronics is the creation of devices with functional molecular components that may provide unique properties. Proteins are attractive candidates for this purpose, as they have specific physical (optical, electrical) and chemical (selective binding, self-assembly) functions and offer a myriad of possibilities for (bio-)chemical modification. This Progress Report focuses on proteins as potential building components for future bioelectronic devices as they are quite efficient electronic conductors, compared with saturated organic molecules. The report addresses several questions: how general is this behavior; how does protein conduction compare with that of saturated and conjugated molecules; and what mechanisms enable efficient conduction across these large molecules? To answer these questions results of nanometer-scale and macroscopic electronic transport measurements across a range of organic molecules and proteins are compiled and analyzed, from single/few molecules to large molecular ensembles, and the influence of measurement methods on the results is considered. Generalizing, it is found that proteins conduct better than saturated molecules, and somewhat poorer than conjugated molecules. Significantly, the presence of cofactors (redox-active or conjugated) in the protein enhances their conduction, but without an obvious advantage for natural electron transfer proteins. Most likely, the conduction mechanisms are hopping (at higher temperatures) and tunneling (below ca. 150-200 K).
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Affiliation(s)
- Nadav Amdursky
- Dept. of Materials & Interfaces, Weizmann Institute of Science, Rehovot, 76305, Israel
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15
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Haya L, Pardo JI, Mainar AM, Fatás E, Urieta JS. Regioselectivity of Electrochemical C-H Functionalization Via Iminium Ion. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Kaplan JM, Shang J, Gobbo P, Antonello S, Armelao L, Chatare V, Ratner DM, Andrade RB, Maran F. Conformationally constrained functional peptide monolayers for the controlled display of bioactive carbohydrate ligands. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:8187-8192. [PMID: 23782319 PMCID: PMC3770261 DOI: 10.1021/la4008894] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this study, we employed thiolated peptides of the conformationally constrained, strongly helicogenic α-aminoisobutyric acid (Aib) residue to prepare self-assembled monolayers (SAMs) on gold surfaces. Electrochemistry and infrared reflection absorption spectroscopy support the formation of very well packed Aib-peptide SAMs. The immobilized peptides retain their helical structure, and the resulting SAMs are stabilized by a network of intermolecular H bonds involving the NH groups adjacent to the Au surface. Binary SAMs containing a synthetically defined glycosylated mannose-functionalized Aib-peptide as the second component display similar features, thereby providing reproducible substrates suitable for the controlled display of bioactive carbohydrate ligands. The efficiency of such Aib-based SAMs as a biomolecular recognition platform was evidenced by examining the mannose-concanavalin A interaction via surface plasmon resonance biosensing.
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Affiliation(s)
- Justin M. Kaplan
- Department of Chemistry, Temple University, Philadelphia, PA, USA
| | - Jing Shang
- Department of Bioengineering, University of Washington, WA, USA
| | | | | | - Lidia Armelao
- IENI-CNR c/o Department of Chemistry, University of Padova, Padova, Italy
| | - Vijay Chatare
- Department of Chemistry, Temple University, Philadelphia, PA, USA
| | | | | | - Flavio Maran
- Department of Chemistry, Temple University, Philadelphia, PA, USA
- Department of Chemistry, University of Padova, Padova, Italy
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Gorin CF, Beh ES, Kanan MW. An Electric Field–Induced Change in the Selectivity of a Metal Oxide–Catalyzed Epoxide Rearrangement. J Am Chem Soc 2011; 134:186-9. [DOI: 10.1021/ja210365j] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Craig F. Gorin
- Stanford University, Department
of Chemistry, 337 Campus Drive, Stanford, California 94305, United
States
| | - Eugene S. Beh
- Stanford University, Department
of Chemistry, 337 Campus Drive, Stanford, California 94305, United
States
| | - Matthew W. Kanan
- Stanford University, Department
of Chemistry, 337 Campus Drive, Stanford, California 94305, United
States
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