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West NG, Bamford SE, Pigram PJ, Pan J, Qi DC, Mechler A. Controllable hierarchical self-assembly: systematic study forming metallosupramolecular frameworks on the basis of helical beta-oligoamides. MATERIALS HORIZONS 2023; 10:5584-5596. [PMID: 37815516 DOI: 10.1039/d3mh01327h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Self-assembly is a key guiding principle for the design of complex nanostructures. Substituted beta oligoamides offer versatile building blocks that can have inherent folding characteristics, offering geometrically defined functionalities that can specifically bind and assemble with predefined morphological characteristics. In this work hierarchical self-assembly is implemented based on metal coordinating helical beta-oligoamides crosslinked with transition metals selected for their favourable coordination geometries, Fe2+, Cu2+, Ni2+, Co2+, Zn2+, and two metalates, MoO42-, and WO42-. The oligoamide Ac-β3Aβ3Vβ3S-αHαHαH-β3Aβ3Vβ3A (3H) was designed to allow crosslinking via three distinct faces of the helical unit, with a possibility of forming three dimensional framework structures. Atomic force microscopy (AFM) confirmed the formation of specific morphologies that differ characteristically with each metal. X-Ray photoelectron spectroscopy (XPS) results reveal that the metal centres can be reduced in the final structures, confirming strong chemical interaction. Time of flight secondary ion mass spectrometry (ToF-SIMS) confirmed the spatial distribution of metals within the self-assembled networks, also revealing molecular fragments that confirm coordination to histidine and carboxyl moieties. The metalates MoO42- and WO42- were also able to induce the formation of specific superstructure morphologies. It was observed that assembly with either of nickel, copper, and molybdate form thin films, while cobalt, zinc, and tungstate produced specific three dimensional networks of oligoamides. Iron was found to form both a thin film and a complex hierarchical assembly with the 3H simultaneously. The design of the 3H substituted beta oligoamide to readily form metallosupramolecular frameworks was demonstrated with a range of metals and metalates with a degree of control over layer thicknesses as a function of the metal/metalate. The results validate and broaden the metallosupramolecular framework concept and establish a platform technology for the design of functional thin layer materials.
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Affiliation(s)
- Norton G West
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore.
| | - Sarah E Bamford
- Center for Materials and Surface Science, and Department of Mathematical and Physical Sciences, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Paul J Pigram
- Center for Materials and Surface Science, and Department of Mathematical and Physical Sciences, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Jisheng Pan
- Institute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore.
| | - Dong-Chen Qi
- School of Chemistry and Physics, Queensland University of Technology, Brisbane, Queensland, 4001, Australia
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
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Shankar S, Junaid Ur Rahim, Rai R. Self-Assembly in Peptides Containing β-and γ-amino Acids. Curr Protein Pept Sci 2020; 21:584-597. [DOI: 10.2174/1389203721666200127112244] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/07/2019] [Accepted: 10/07/2019] [Indexed: 12/17/2022]
Abstract
The peptides containing β-and γ-amino acids as building blocks display well-defined secondary
structures with unique morphologies. The ability of such peptides to self-assemble into complex
structures of controlled geometries has been exploited in biomedical applications. Herein, we have
provided an updated overview about the peptides containing β-and γ-amino acids considering the significance
and advancement in the area of development of peptide-based biomaterials having diverse
applications.
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Affiliation(s)
- Sudha Shankar
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu-180001, India
| | - Junaid Ur Rahim
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu-180001, India
| | - Rajkishor Rai
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Canal Road, Jammu-180001, India
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Habila N, Kulkarni K, Lee TH, Al-Garawi ZS, Serpell LC, Aguilar MI, Del Borgo MP. Transition of Nano-Architectures Through Self-Assembly of Lipidated β 3-Tripeptide Foldamers. Front Chem 2020; 8:217. [PMID: 32296680 PMCID: PMC7136582 DOI: 10.3389/fchem.2020.00217] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/09/2020] [Indexed: 12/18/2022] Open
Abstract
β3-peptides consisting exclusively of β3-amino acids adopt a variety of non-natural helical structures and can self-assemble into well-defined hierarchical structures by axial head-to-tail self-assembly resulting in fibrous materials of varying sizes and shapes. To allow control of fiber morphology, a lipid moiety was introduced within a tri-β3-peptide sequence at each of the three amino acid positions and the N-terminus to gain finer control over the lateral assembly of fibers. Depending on the position of the lipid, the self-assembled structures formed either twisted ribbon-like fibers or distinctive multilaminar nanobelts. The nanobelt structures were comprised of multiple layers of peptide fibrils as revealed by puncturing the surface of the nanobelts with an AFM probe. This stacking phenomenon was completely inhibited through changes in pH, indicating that the layer stacking was mediated by electrostatic interactions. Thus, the present study is the first to show controlled self-assembly of these fibrous structures, which is governed by the location of the acyl chain in combination with the 3-point H-bonding motif. Overall, the results demonstrate that the nanostructures formed by the β3-tripeptide foldamers can be tuned via sequential lipidation of N-acetyl β3-tripeptides which control the lateral interactions between peptide fibrils and provide defined structures with a greater homogeneous population.
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Affiliation(s)
- Nathan Habila
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Ketav Kulkarni
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Tzong-Hsien Lee
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Zahraa S Al-Garawi
- School of Life Sciences, University of Sussex, Brighton, United Kingdom.,Chemistry Department, Mustansiriyah University, Baghdad, Iraq
| | - Louise C Serpell
- School of Life Sciences, University of Sussex, Brighton, United Kingdom
| | - Marie-Isabel Aguilar
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia
| | - Mark P Del Borgo
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC, Australia.,Department of Pharmacology, Monash University, Clayton, VIC, Australia
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Del Borgo MP, Kulkarni K, Aguilar MI. Unique Functional Materials Derived from β-Amino Acid Oligomers. Aust J Chem 2017. [DOI: 10.1071/ch16511] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The unique structures formed by β-amino acid oligomers, or β-peptide foldamers, have been studied for almost two decades, which has led to the discovery of several distinctive structures and bioactive molecules. Recently, this area of research has expanded from conventional peptide drug design to the formation of assemblies and nanomaterials by peptide self-assembly. The unique structures formed by β-peptides give rise to a set of new materials with altered properties that differ from conventional peptide-based materials; such new materials may be useful in several bio- and nanomaterial applications.
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Unexpected involvement of staple leads to redesign of selective bicyclic peptide inhibitor of Grb7. Sci Rep 2016; 6:27060. [PMID: 27257138 PMCID: PMC4891710 DOI: 10.1038/srep27060] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 05/12/2016] [Indexed: 01/11/2023] Open
Abstract
The design of potent and specific peptide inhibitors to therapeutic targets is of enormous utility for both proof-of-concept studies and for the development of potential new therapeutics. Grb7 is a key signaling molecule in the progression of HER2 positive and triple negative breast cancers. Here we report the crystal structure of a stapled bicyclic peptide inhibitor G7-B1 in complex with the Grb7-SH2 domain. This revealed an unexpected binding mode of the peptide, in which the staple forms an alternative contact with the surface of the target protein. Based on this structural information, we designed a new series of bicyclic G7 peptides that progressively constrain the starting peptide, to arrive at the G7-B4 peptide that binds with an approximately 2-fold enhanced affinity to the Grb7-SH2 domain (KD = 0.83 μM) compared to G7-B1 and shows low affinity binding to Grb2-, Grb10- and Grb14-SH2 domains (KD > 100 μM). Furthermore, we determined the structure of the G7-B4 bicyclic peptide in complex with the Grb7-SH2 domain, both before and after ring closing metathesis to show that the closed staple is essential to the target interaction. The G7-B4 peptide represents an advance in the development of Grb7 inhibitors and is a classical example of structure aided inhibitor development.
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Luder K, Kulkarni K, Lee HW, Widdop RE, Del Borgo MP, Aguilar MI. Decorated self-assembling β3-tripeptide foldamers form cell adhesive scaffolds. Chem Commun (Camb) 2016; 52:4549-52. [DOI: 10.1039/c6cc00247a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
β-Peptide foldamers were functionalised with the cell recognition motifs RGD or IKVAV, self-assembled into fibres, and co-assembled with non-functionalised β-peptides to yield tunable bioscaffolds with cell adhering properties.
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Affiliation(s)
- Kerstin Luder
- Department of Biochemistry & Molecular Biology
- Monash University
- Clayton
- Australia
| | - Ketav Kulkarni
- Department of Biochemistry & Molecular Biology
- Monash University
- Clayton
- Australia
| | - Huey Wen Lee
- Department of Pharmacology
- Monash University
- Clayton
- Australia
| | | | - Mark P. Del Borgo
- Department of Biochemistry & Molecular Biology
- Monash University
- Clayton
- Australia
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Gopalan R, Del Borgo M, Mechler A, Perlmutter P, Aguilar MI. Geometrically Precise Building Blocks: the Self-Assembly of β-Peptides. ACTA ACUST UNITED AC 2015; 22:1417-1423. [DOI: 10.1016/j.chembiol.2015.10.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 09/30/2015] [Accepted: 10/03/2015] [Indexed: 12/23/2022]
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2012. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.02.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Del Borgo MP, Mechler AI, Traore D, Forsyth C, Wilce JA, Wilce MCJ, Aguilar MI, Perlmutter P. Supramolecular Self-Assembly ofN-Acetyl-Capped β-Peptides Leads to Nano- to Macroscale Fiber Formation. Angew Chem Int Ed Engl 2013; 52:8266-70. [DOI: 10.1002/anie.201303175] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Indexed: 12/26/2022]
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Del Borgo MP, Mechler AI, Traore D, Forsyth C, Wilce JA, Wilce MCJ, Aguilar MI, Perlmutter P. Supramolecular Self-Assembly ofN-Acetyl-Capped β-Peptides Leads to Nano- to Macroscale Fiber Formation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303175] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Vollrath SBL, Bräse S, Kirshenbaum K. Twice tied tight: Enforcing conformational order in bicyclic peptoid oligomers. Chem Sci 2012. [DOI: 10.1039/c2sc20473h] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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