1
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Pahar S, Maayan G. An intramolecular cobalt-peptoid complex as an efficient electrocatalyst for water oxidation at low overpotential. Chem Sci 2024; 15:12928-12938. [PMID: 39148784 PMCID: PMC11323339 DOI: 10.1039/d4sc01182a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 07/05/2024] [Indexed: 08/17/2024] Open
Abstract
Water electrolysis is the simplest way to produce hydrogen, as a clean renewable fuel. However, the high overpotential and slow kinetics hamper its applicability. Designing efficient and stable electrocatalysts for water oxidation (WO), which is the first and limiting step of the water splitting process, can overcome this limitation. However, the development of such catalysts based on non-precious metal ions is still challenging. Herein we describe a bio-inspired Co(iii)-based complex i.e., a stable and efficient molecular electrocatalyst for WO, constructed from a peptidomimetic oligomer called peptoid - N-substituted glycine oligomer - bearing two binding ligands, terpyridine and bipyridine, and one ethanolic group as a proton shuttler. Upon binding of a cobalt ion, this peptoid forms an intramolecular Co(iii) complex, that acts as an efficient electrocatalyst for homogeneous WO in aqueous phosphate buffer at pH 7 with a high faradaic efficiency of up to 92% at an overpotential of about 430 mV, which is the lowest reported for Co-based homogeneous WO electrocatalysts to date. We demonstrated the high stability of the complex during electrocatalytic WO and that the ethanolic side chain plays a key role in the stability and activity of the complex and also in facilitating water binding, thus mimicking an enzymatic second coordination sphere.
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Affiliation(s)
- Suraj Pahar
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology Technion City Haifa 3200008 Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology Technion City Haifa 3200008 Israel
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2
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Qamer S, Che-Hamzah F, Misni N, Joseph NMS, Al-Haj NA, Amin-Nordin S. Deploying a Novel Approach to Prepare Silver Nanoparticle Bellamya bengalensis Extract Conjugate Coating on Orthopedic Implant Biomaterial Discs to Prevent Potential Biofilm Formation. Antibiotics (Basel) 2023; 12:1403. [PMID: 37760700 PMCID: PMC10526060 DOI: 10.3390/antibiotics12091403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/01/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
This study is based on the premise of investigating antibacterial activity through a novel conjugate of silver nanoparticles (AgNPs) and antimicrobial peptides (AMPs) in line with a green synthesis approach by developing antimicrobial-coated implants to prevent bacterial resistance. The AMPs were obtained from Bellamya Bengalensis (BB), a freshwater snail, to prepare the nanocomposite conjugate, e.g., AgNPs@BB extract, by making use of UV-Visible spectroscopy. The antimicrobial assessment of AgNPs@BB extract conjugate was performed using the Resazurin Microtiter Assay Method (REMA), followed by the use of three biocompatible implant materials (titanium alloys, Ti 6AL-4V stainless steel 316L, and polyethylene). Finally, the coating was analyzed under confocal microscopy. The results revealed a significant reduction of biofilm formation on the surfaces of implants coated with conjugate (AgNPs@BB extract) in comparison to uncoated implants. For the MTT assay, no significant changes were recorded for the cells grown on the AgNPs/AMP++ sample in high concentrations. Staphylococcus epidermidis, however, showed more prominent growth on all implants in comparison to Staphylococcus aureus. It is evident from the results that Staphylococcus epidermidis is more susceptible to AgNPs@BB extract, while the minimum inhibitory concentration (MIC) value of AgNPs@BB extract conjugates and biosynthesized AgNPs was also on the higher side. This study indicates that AgNPs@BB extract carries antibacterial activity, and concludes that an excessive concentration of AgNPs@BB extract may affect the improved biocompatibility. This study recommends using robust, retentive, and antimicrobial coatings of AgNPs@BB extract for implantable biocompatible materials in accordance with the novel strategy of biomaterial applications.
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Affiliation(s)
- Shafqat Qamer
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, Alkharj 11942, Saudi Arabia
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia 43400, Selangor, Malaysia; (S.Q.); (N.M.); (N.M.S.J.)
| | - Fahrudin Che-Hamzah
- Orthopedic Department, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia 43400, Selangor, Malaysia;
| | - Norashiqin Misni
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia 43400, Selangor, Malaysia; (S.Q.); (N.M.); (N.M.S.J.)
| | - Narcisse M. S. Joseph
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia 43400, Selangor, Malaysia; (S.Q.); (N.M.); (N.M.S.J.)
| | - Nagi A. Al-Haj
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Sana’a University, Sana’a 009671, Yemen;
| | - Syafinaz Amin-Nordin
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia 43400, Selangor, Malaysia; (S.Q.); (N.M.); (N.M.S.J.)
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3
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Reyes-Angeles MC, Caldera-Villalobos M, García-Serrano J, Trejo-Carbajal N, Esparza-González SC, Guerrero-Serrano AL, Herrera-González AM. Green synthesis of 1D and 0D Ag nanostructures using oligomeric polyelectrolytes as reducing and stabilizing agents. Colloid Polym Sci 2022. [DOI: 10.1007/s00396-022-05002-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Jin B, Yan F, Qi X, Cai B, Tao J, Fu X, Tan S, Zhang P, Pfaendtner J, Naser NY, Baneyx F, Zhang X, DeYoreo JJ, Chen C. Peptoid-Directed Formation of Five-Fold Twinned Au Nanostars through Particle Attachment and Facet Stabilization. Angew Chem Int Ed Engl 2022; 61:e202201980. [PMID: 35167709 PMCID: PMC9258440 DOI: 10.1002/anie.202201980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Indexed: 11/17/2022]
Abstract
While bio-inspired synthesis offers great potential for controlling nucleation and growth of inorganic particles, precisely tuning biomolecule-particle interactions is a long-standing challenge. Herein, we used variations in peptoid sequence to manipulate peptoid-Au interactions, leading to the synthesis of concave five-fold twinned, five-pointed Au nanostars via a process of repeated particle attachment and facet stabilization. Ex situ and liquid-phase TEM observations show that a balance between particle attachment biased to occur near the star points, preferential growth along the [100] direction, and stabilization of (111) facets is critical to forming star-shaped particles. Molecular simulations predict that interaction strengths between peptoids and distinct Au facets differ significantly and thus can alter attachment kinetics and surface energies to form the stars. This work provides new insights into how sequence-defined ligands affect particle growth to regulate crystal morphology.
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Affiliation(s)
- Biao Jin
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Feng Yan
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- School of Chemistry & Chemical Engineering, Linyi University The Middle Part of Shuangling Road, Linyi, Shandong Province, 276005 (China)
| | - Xin Qi
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Bin Cai
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Jinhui Tao
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - Xiaofeng Fu
- Department of Biological Science, Florida State University 600 W College Ave, Tallahassee, FL 32306 (USA)
| | - Susheng Tan
- Department of Electrical and Computer Engineering & Petersen Institute of Nanoscience and Engineering (PINSE) University of Pittsburgh 4200 Fifth Ave, Pittsburgh, PA 15260 (USA)
| | - Peijun Zhang
- Division of Structural Biology, Wellcome Trust Centre for Human Genetics, University of Oxford University Offices, Wellington Square, Oxford, OX1 2JD (UK)
- Diamond Light Source Harwell Science and Innovation Campus, Didcot OX11 0DE (UK)
| | - Jim Pfaendtner
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Nada Y. Naser
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - François Baneyx
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Xin Zhang
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
| | - James J. DeYoreo
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Materials Science and Engineering University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
| | - Chunlong Chen
- Physical Sciences Division, Pacific Northwest National Laboratory 902 Battellt Boulevard, Richland, WA 99352 (USA)
- Department of Chemical Engineering, University of Washington 1410 NE Campus Parkway, Seattle, WA 98195 (USA)
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5
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Jin B, Yan F, Qi X, Cai B, Tao J, Fu X, Tan S, Zhang P, Pfaendtner J, Naser NY, Baneyx F, Zhang X, DeYoreo JJ, Chen C. Peptoid‐Directed Formation of Five‐Fold Twinned Au Nanostars through Particle Attachment and Facet Stabilization. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Biao Jin
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - Feng Yan
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- School of Chemistry & Chemical Engineering Linyi University The Middle Part of Shuangling Road Linyi Shandong Province 276005 China
| | - Xin Qi
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Bin Cai
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- School of Chemistry and Chemical Engineering Shandong University Shanda Nan Road 27 Jinan China
| | - Jinhui Tao
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - Xiaofeng Fu
- Department of Biological Science Florida State University 600 W College Ave Tallahassee FL 32306 USA
| | - Susheng Tan
- Department of Electrical and Computer Engineering & Petersen Institute of Nanoscience and Engineering (PINSE) University of Pittsburgh 4200 Fifth Ave Pittsburgh PA 15260 USA
| | - Peijun Zhang
- Division of Structural Biology Wellcome Trust Centre for Human Genetics University of Oxford Roosevelt Drive, Wellington Square Oxford OX3 7BN UK
- Diamond Light Source Harwell Science and Innovation Campus Didcot OX11 0DE UK
| | - Jim Pfaendtner
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Nada Y. Naser
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - François Baneyx
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Xin Zhang
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
| | - James J. DeYoreo
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Materials Science and Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
| | - Chun‐Long Chen
- Physical Sciences Division Pacific Northwest National Laboratory 902 Battelle Boulevard Richland WA 99352 USA
- Department of Chemical Engineering University of Washington 1410 NE Campus Parkway Seattle WA 98195 USA
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6
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Herlan CN, Feser D, Schepers U, Bräse S. Bio-instructive materials on-demand - combinatorial chemistry of peptoids, foldamers, and beyond. Chem Commun (Camb) 2021; 57:11131-11152. [PMID: 34611672 DOI: 10.1039/d1cc04237h] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Combinatorial chemistry allows for the rapid synthesis of large compound libraries for high throughput screenings in biology, medicinal chemistry, or materials science. Especially compounds from a highly modular design are interesting for the proper investigation of structure-to-activity relationships. Permutations of building blocks result in many similar but unique compounds. The influence of certain structural features on the entire structure can then be monitored and serve as a starting point for the rational design of potent molecules for various applications. Peptoids, a highly diverse class of bioinspired oligomers, suit perfectly for combinatorial chemistry. Their straightforward synthesis on a solid support using repetitive reaction steps ensures easy handling and high throughput. Applying this modular approach, peptoids are readily accessible, and their interchangeable side-chains allow for various structures. Thus, peptoids can easily be tuned in their solubility, their spatial structure, and, consequently, their applicability in various fields of research. Since their discovery, peptoids have been applied as antimicrobial agents, artificial membranes, molecular transporters, and much more. Studying their three-dimensional structure, various foldamers with fascinating, unique properties were discovered. This non-comprehensive review will state the most interesting discoveries made over the past years and arouse curiosity about what may come.
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Affiliation(s)
- Claudine Nicole Herlan
- Institute of Biological and Chemical Systems-Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | - Dominik Feser
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Ute Schepers
- Institute of Functional Interfaces (IFG), Karlsruhe Institute of Technology (KIT), Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.,Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz Haber Weg 6, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute of Biological and Chemical Systems-Functional Molecular Systems (IBCS-FMS), Karlsruhe Institute of Technology (KIT), Hermann von Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, Germany. .,Institute of Organic Chemistry (IOC), Karlsruhe Institute of Technology (KIT), Fritz Haber Weg 6, 76131 Karlsruhe, Germany
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7
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Ghosh P, Maayan G. A Water‐Soluble Peptoid that Can Extract Cu
2+
from Metallothionein via Selective Recognition. Chemistry 2020; 27:1383-1389. [DOI: 10.1002/chem.202003711] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 08/27/2020] [Indexed: 12/19/2022]
Affiliation(s)
- Pritam Ghosh
- Schulich Faculty of Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200008 Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry Technion-Israel Institute of Technology Technion City Haifa 3200008 Israel
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8
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Darapaneni CM, Ghosh P, Ghosh T, Maayan G. Unique β‐Turn Peptoid Structures and Their Application as Asymmetric Catalysts. Chemistry 2020; 26:9573-9579. [DOI: 10.1002/chem.202000595] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Indexed: 12/13/2022]
Affiliation(s)
| | - Pritam Ghosh
- Schulich Faculty of ChemistryTechnion-Israel Institute of Technology Haifa 3200008 Israel
| | - Totan Ghosh
- Schulich Faculty of ChemistryTechnion-Israel Institute of Technology Haifa 3200008 Israel
| | - Galia Maayan
- Schulich Faculty of ChemistryTechnion-Israel Institute of Technology Haifa 3200008 Israel
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9
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Wellhöfer I, Frydenvang K, Kotesova S, Christiansen AM, Laursen JS, Olsen CA. Functionalized Helical β-Peptoids. J Org Chem 2019; 84:3762-3779. [DOI: 10.1021/acs.joc.9b00218] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Isabelle Wellhöfer
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Karla Frydenvang
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Simona Kotesova
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Andreas M. Christiansen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Jonas S. Laursen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
| | - Christian A. Olsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark
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10
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Tigger-Zaborov H, Maayan G. Aggregation of Ag(0) nanoparticles to unexpected stable chain-like assemblies mediated by 2,2′-bipyridine decorated peptoids. J Colloid Interface Sci 2019; 533:598-603. [DOI: 10.1016/j.jcis.2018.08.094] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 08/26/2018] [Accepted: 08/27/2018] [Indexed: 10/28/2022]
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11
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Ghosh T, Ghosh P, Maayan G. A Copper-Peptoid as a Highly Stable, Efficient, and Reusable Homogeneous Water Oxidation Electrocatalyst. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03661] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Totan Ghosh
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Pritam Ghosh
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 3200008, Israel
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12
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Ghosh T, Fridman N, Kosa M, Maayan G. Self-Assembled Cyclic Structures from Copper(II) Peptoids. Angew Chem Int Ed Engl 2018; 57:7703-7708. [DOI: 10.1002/anie.201800583] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 03/01/2018] [Indexed: 01/11/2023]
Affiliation(s)
- Totan Ghosh
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Monica Kosa
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
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13
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Ghosh T, Fridman N, Kosa M, Maayan G. Self-Assembled Cyclic Structures from Copper(II) Peptoids. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800583] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Totan Ghosh
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Natalia Fridman
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Monica Kosa
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Technion City Haifa 3200008 Israel
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14
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Kaminker R, Kaminker I, Gutekunst WR, Luo Y, Lee S, Niu J, Han S, Hawker CJ. Tuning conformation and properties of peptidomimetic backbones through dual N/C α-substitution. Chem Commun (Camb) 2018; 54:5237-5240. [PMID: 29726557 PMCID: PMC6089238 DOI: 10.1039/c8cc01356j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We demonstrate that changing the backbone between peptides, peptoids and the underexplored dual N/Cα-substituted peptoids analogues allows for control over the preferred conformation of the intrinsically disordered biomimetic oligomers. The conformation tunability is directly probed using electron paramagnetic resonance (EPR), and is shown to manifest itself in differences in the nanoparticle-oligomer hybridization propensity.
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Affiliation(s)
- R Kaminker
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, USA.
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15
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Darapaneni CM, Kaniraj PJ, Maayan G. Water soluble hydrophobic peptoids via a minor backbone modification. Org Biomol Chem 2018; 16:1480-1488. [DOI: 10.1039/c7ob02928d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The incorporation of piperazine or homopiperazine within hydrophobic peptoid scaffolds leads to their water solubility while increasing their overall conformational order in water.
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Affiliation(s)
| | - Prathap Jeya Kaniraj
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion City
- Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion City
- Israel
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16
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Chandra Mohan D, Sadhukha A, Maayan G. A metallopeptoid as an efficient bioinspired cooperative catalyst for the aerobic oxidative synthesis of imines. J Catal 2017. [DOI: 10.1016/j.jcat.2017.09.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Tigger-Zaborov H, Maayan G. Nanoparticles assemblies on demand: Controlled aggregation of Ag(0) mediated by modified peptoid sequences. J Colloid Interface Sci 2017; 508:56-64. [PMID: 28822292 DOI: 10.1016/j.jcis.2017.08.039] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/09/2017] [Accepted: 08/11/2017] [Indexed: 01/09/2023]
Abstract
Assemblies of metal nanoparticles (NPs) have been broadly used for the construction of materials with distinct spectroscopic properties towards sensing applications. On the other hand, well-dispersed NPs are exploit for applications in catalysis and medicine. Biopolymers or biomimetic oligomers can serve both as efficient stabilizers of NPs and as useful aggregation mediators that can lead to assemblies with unique properties. Controlling aggregation processes, however, is still challenging and often relies on trial and error rather than on defined thumb rules. Herein we develop specific guidelines for the controlled aggregation of Ag(0) NPs at room temperature in water near neutral pH and without any additives. We use short peptide mimics, N-substituted glycine oligomers called peptoids, as mediators, and investigate the influence of sequences variations on the NPs assembly. Spectroscopic and electron microscopy data reveal that both the length of the peptoids and their sequences have an effect on the NPs aggregation. Thus, we demonstrate that we can control both the degree of aggregation and the aggregates sizes by tuning these properties. Specifically we show that longer peptoid sequences as well as sequences consisting of aromatic side chains are required for the formation of uniform NPs assemblies in an average size of 70nm, while a short hydrophilic sequence can stabilize well-dispersed Ag(0) NPs. Moreover, the catalytic activity of Ag(0) NPs towards the reduction of 4-nitrophenol to 4-aminophenol can be also controlled by varying the properties of the peptoid mediators.
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Affiliation(s)
- Hagar Tigger-Zaborov
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa, Israel.
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18
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Nalband DM, Warner BP, Zahler NH, Kirshenbaum K. Rapid identification of metal-binding peptoid oligomers by on-resin X-ray fluorescence screening. Biopolymers 2016; 102:407-15. [PMID: 25059748 DOI: 10.1002/bip.22528] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 07/17/2014] [Accepted: 07/18/2014] [Indexed: 12/18/2022]
Abstract
N-Substituted glycine peptoid oligomers have recently attracted attention for their metal binding capabilities. Due to their efficient synthesis on solid phase, peptoids are well suited for generation of compound libraries, followed by screening for molecular recognition and other diverse functional attributes. Ideally, peptoids could be simultaneously screened for binding to a number of metal species. Here, we demonstrate the use of bench-top X-ray fluorescence (XRF) instrumentation to screen rapidly, on solid support, a library of peptoid oligomers incorporating metal-binding functionalities. A subset of the peptoid sequences exhibited significant metal binding capabilities, including a peptoid pentamer and a nonamer that were shown to selectively bind nickel. The binding capabilities were validated by colorimetric assay and by depletion of Ni(2+) ion concentration from solution, establishing bench-top XRF as a rapid, practicable high-throughput screening technique for peptoid oligomers. This protocol will facilitate discovery of metallopeptoids with unique material properties.
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19
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Baskin M, Maayan G. A rationally designed metal-binding helical peptoid for selective recognition processes. Chem Sci 2016; 7:2809-2820. [PMID: 28660058 PMCID: PMC5477017 DOI: 10.1039/c5sc04358a] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Accepted: 01/08/2016] [Indexed: 12/13/2022] Open
Abstract
A helical peptoid bearing two distinct metal binding ligands at positions i and i+3 (Helix HQT i+3) enables the selective recognition of one or two metal ions depending on its environment, thus mimicking the unique recognition abilities of natural biopolymers.
Metal-binding biopolymers play a significant role in processes, such as regulation, recognition and catalysis, due to their high affinity towards specific metal ions, which they bind selectively from the cellular pool. Many enzymes can bind two or more metal ions, each at a specific binding site, to enable efficient cooperative function. Imitating these recognition abilities might lead to the production of biomimetic materials such as unique chelators and catalysts. Herein, we report a rationally designed helical peptoid bearing two distinct metal binding ligands at positions i and i + 3 (Helix HQT i + 3), which enables the selective recognition of one or two metal ions depending on its environment. Using various spectroscopic techniques, we describe (1) the selective intramolecular binding of Cu2+ and its extraction from a mixture of neighboring metal ions in high concentrations, and (2) the selective intermolecular binding of two different metal ions, including the pair Cu2+ and Zn2+, one at each binding site, for the generation of hetero-bimetallic peptoid duplexes. Thorough analysis and comparison between the spectroscopic data and association constants of the metal complexes formed by Helix HQT i + 3 and those formed by non-helical peptoids, or helical peptoids in which the two metal binding ligands are not pre-organized, revealed that the unique recognition processes performed by Helix HQT i + 3 are controlled by both the sequence and the structure of the peptoid.
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Affiliation(s)
- Maria Baskin
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Hailfa 32000 , Israel .
| | - Galia Maayan
- Schulich Faculty of Chemistry , Technion-Israel Institute of Technology , Technion City , Hailfa 32000 , Israel .
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Baskin M, Maayan G. Water-soluble chiral metallopeptoids. Biopolymers 2015; 104:577-84. [DOI: 10.1002/bip.22675] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/19/2015] [Accepted: 05/04/2015] [Indexed: 01/09/2023]
Affiliation(s)
- Maria Baskin
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 32000 Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry; Technion-Israel Institute of Technology; Haifa 32000 Israel
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21
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Tigger-Zaborov H, Maayan G. Aggregation of inorganic nanoparticles mediated by biomimetic oligomers. Org Biomol Chem 2015. [PMID: 26222802 DOI: 10.1039/c5ob01093d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Assemblies of nanoparticles (NPs) have been broadly used for the construction of materials with unique spectroscopic and chiral properties for applications in various scientific disciplines such as sensing, bio-nanotechnology and medicine. Mediating the aggregation of NPs by synthetic biomimetic oligomers, namely, DNA, PNA, peptides and peptide mimics, rather than by small organic molecules has been shown to produce interesting supramolecular structures and enable the combination of the biocompatibility of the mediators and the spectroscopic properties of the NPs. Yet, the key to using this powerful approach for designing new functional materials is to understand the NPs aggregation patterns induced by biopolymers and biomimetic oligomers. Herein we describe the important developments in this field, from early studies to recent work with an emphasis on synthetic methods and tools for controlled assembly of metal NPs by biomimetic polymers and oligomers.
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22
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Preparation, Structure, and Properties of Hybrid Polymer Composites Containing Silver Clusters and Nanoparticles. THEOR EXP CHEM+ 2015. [DOI: 10.1007/s11237-015-9401-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Abstract
Metallopeptoid catalysts incorporating phenanthroline–copper and TEMPO, and at least one non-catalytic group perform in the oxidation of various benzylic, allylic and aliphatic primary alcohols with a TON of up to 16 times higher than a mixture of the two catalytic groups or the peptoid dimer that is lacking the non-catalytic group.
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Affiliation(s)
- Kaniraj Jeya Prathap
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa
- Israel
| | - Galia Maayan
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Haifa
- Israel
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24
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Mondal S, Verma S. Catalytic and SERS Activities of Tryptophan-EDTA Capped Silver Nanoparticles. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400056] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Abstract
Reports of peptoid structures and interfaces highlighting their potential as synthetically convenient, multifunctional, modular and precisely tunable biomaterials are reviewed.
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Affiliation(s)
- King Hang Aaron Lau
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow, UK
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26
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Sun J, Zuckermann RN. Peptoid polymers: a highly designable bioinspired material. ACS NANO 2013; 7:4715-32. [PMID: 23721608 DOI: 10.1021/nn4015714] [Citation(s) in RCA: 307] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Bioinspired polymeric materials are attracting increasing attention due to significant advantages over their natural counterparts: the ability to precisely tune their structures over a broad range of chemical and physical properties, increased stability, and improved processability. Polypeptoids, a promising class of bioinspired polymer based on a N-substituted glycine backbone, have a number of unique properties that bridge the material gap between proteins and bulk polymers. Peptoids combine the sequence specificity of biopolymers with the simpler intra/intermolecular interactions and robustness of traditional synthetic polymers. They are highly designable because hundreds of chemically diverse side chains can be introduced from simple building blocks. Peptoid polymers can be prepared by two distinct synthetic techniques offering access to two material subclasses: (1) automated solid-phase synthesis which enables precision sequence control and near absolute monodispersity up to chain lengths of ~50 monomers, and (2) a classical polymerization approach which allows access to higher molecular weights and larger-scale yields, but with less control over length and sequence. This combination of facile synthetic approaches makes polypeptoids a highly tunable, rapid polymer prototyping platform to investigate new materials that are intermediate between proteins and bulk polymers, in both their structure and their properties. In this paper, we review the methods to synthesize peptoid polymers and their applications in biomedicine and nanoscience, as both sequence-specific materials and as bulk polymers.
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Affiliation(s)
- Jing Sun
- Molecular Foundry, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA
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27
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El-Dessouky R, Georges M, Azzazy HME. Silver Nanostructures: Properties, Synthesis, and Biosensor Applications. ACS SYMPOSIUM SERIES 2012. [DOI: 10.1021/bk-2012-1112.ch014] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Raghda El-Dessouky
- Department of Chemistry and Yousef Jameel Science & Technology Research Center, The American University in Cairo, New Cairo, Egypt 11835
| | - Mariam Georges
- Department of Chemistry and Yousef Jameel Science & Technology Research Center, The American University in Cairo, New Cairo, Egypt 11835
| | - Hassan M. E. Azzazy
- Department of Chemistry and Yousef Jameel Science & Technology Research Center, The American University in Cairo, New Cairo, Egypt 11835
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