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Zelzer M, Ulijn RV. Next-generation peptide nanomaterials: molecular networks, interfaces and supramolecular functionality. Chem Soc Rev 2010; 39:3351-7. [DOI: 10.1039/c0cs00035c] [Citation(s) in RCA: 251] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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102
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Mishima T, Ohkuri T, Monji A, Kanemaru T, Abe Y, Ueda T. Residual Structures in the Acid-Unfolded States of Vλ6 Proteins Affect Amyloid Fibrillation. J Mol Biol 2009; 392:1033-43. [DOI: 10.1016/j.jmb.2009.07.078] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 06/27/2009] [Accepted: 07/27/2009] [Indexed: 10/20/2022]
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103
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Tamamis P, Adler-Abramovich L, Reches M, Marshall K, Sikorski P, Serpell L, Gazit E, Archontis G. Self-assembly of phenylalanine oligopeptides: insights from experiments and simulations. Biophys J 2009; 96:5020-9. [PMID: 19527662 DOI: 10.1016/j.bpj.2009.03.026] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 02/25/2009] [Accepted: 03/24/2009] [Indexed: 10/20/2022] Open
Abstract
Studies of peptide-based nanostructures provide general insights into biomolecular self-assembly and can lead material engineering toward technological applications. The diphenylalanine peptide (FF) self-assembles into discrete, hollow, well ordered nanotubes, and its derivatives form nanoassemblies of various morphologies. Here we demonstrate for the first time, to our knowledge, the formation of planar nanostructures with beta-sheet content by the triphenylalanine peptide (FFF). We characterize these structures using various microscopy and spectroscopy techniques. We also obtain insights into the interactions and structural properties of the FF and FFF nanostructures by 0.4-micros, implicit-solvent, replica-exchange, molecular-dynamics simulations of aqueous FF and FFF solutions. In the simulations the peptides form aggregates, which often contain open or ring-like peptide networks, as well as elementary and network-containing structures with beta-sheet characteristics. The networks are stabilized by polar and nonpolar interactions, and by the surrounding aggregate. In particular, the charged termini of neighbor peptides are involved in hydrogen-bonding interactions and their aromatic side chains form "T-shaped" contacts, as in three-dimensional FF crystals. These interactions may assist the FF and FFF self-assembly at the early stage, and may also stabilize the mature nanostructures. The FFF peptides have higher network propensities and increased aggregate stabilities with respect to FF, which can be interpreted energetically.
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Naskar J, Palui G, Banerjee A. Tetrapeptide-Based Hydrogels: for Encapsulation and Slow Release of an Anticancer Drug at Physiological pH. J Phys Chem B 2009; 113:11787-92. [DOI: 10.1021/jp904251j] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jishu Naskar
- Indian Association for the Cultivation of Science, Biological Chemistry Department, Jadavpur, Kolkata-700032, India
| | - Goutam Palui
- Indian Association for the Cultivation of Science, Biological Chemistry Department, Jadavpur, Kolkata-700032, India
| | - Arindam Banerjee
- Indian Association for the Cultivation of Science, Biological Chemistry Department, Jadavpur, Kolkata-700032, India
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Bellesia G, Shea JE. What determines the structure and stability of KFFE monomers, dimers, and protofibrils? Biophys J 2009; 96:875-86. [PMID: 19186127 DOI: 10.1016/j.bpj.2008.10.040] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Accepted: 10/28/2008] [Indexed: 02/03/2023] Open
Abstract
The self-assembly of the KFFE peptide was studied using replica exchange molecular dynamics simulations with a fully atomic description of the peptide and explicit solvent. The relative roles of the aromatic residues and oppositely charged end groups in stabilizing the earliest oligomers and the end-products of aggregation were investigated. beta and non-beta-peptide conformations compete in the monomeric state as a result of a balancing between the high beta-sheet propensity of the phenylalanine residues and charge-charge interactions that favor non-beta-conformations. Dimers are present in beta- and non-beta-sheet conformations and are stabilized primarily by direct and water-mediated charge-charge interactions between oppositely charged side chains and between oppositely charged termini, with forces between aromatic residues playing a minor role. Dimerization to a beta-sheet, fibril-competent state, is seen to be a cooperative process, with the association process inducing beta-structure in otherwise non-beta-monomers. We propose a model for the KFFE fibril, with mixed interface and antiparallel sheet and strand arrangements, which is consistent with experimental electron microscopy measurements. Both aromatic and charge-charge interactions contribute to the fibril stability, although the dominant contribution arises from electrostatic interactions.
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Affiliation(s)
- Giovanni Bellesia
- Department of Chemistry and Biochemistry, and Department of Physics, University of California at Santa Barbara, Santa Barbara, California, USA
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Jayawarna V, Richardson SM, Hirst AR, Hodson NW, Saiani A, Gough JE, Ulijn RV. Introducing chemical functionality in Fmoc-peptide gels for cell culture. Acta Biomater 2009; 5:934-43. [PMID: 19249724 DOI: 10.1016/j.actbio.2009.01.006] [Citation(s) in RCA: 225] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Revised: 12/23/2008] [Accepted: 01/07/2009] [Indexed: 10/25/2022]
Abstract
Aromatic short peptide derivatives, i.e. peptides modified with aromatic groups such as 9-fluorenylmethoxycarbonyl (Fmoc), can self-assemble into self-supporting hydrogels. These hydrogels have some similarities to extracellular matrices due to their high hydration, relative stiffness and nanofibrous architecture. We previously demonstrated that Fmoc-diphenylalanine (Fmoc-F(2)) provides a suitable matrix for two-dimensional (2D) or three-dimensional (3D) culture of primary bovine chondrocytes. In this paper we investigate whether the introduction of chemical functionality, such as NH(2), COOH or OH, enhances compatibility with different cell types. A series of hydrogel compositions consisting of combinations of Fmoc-F(2) and n-protected Fmoc amino acids, lysine (K, with side chain R=(CH(2))(4)NH(2)), glutamic acid (D, with side chain R=CH(2)COOH), and serine (S, with side chain R=CH(2)OH) were studied. All compositions produced fibrous scaffolds with fibre diameters in the range of 32-65 nm as assessed by cryo-scanning electron microscopy and atomic force microscopy. Fourier transform infrared spectroscopy analysis suggested that peptide segments adopt a predominantly antiparallel beta-sheet conformation. Oscillatory rheology results show that all four hydrogels have mechanical profiles of soft viscoelastic materials with elastic moduli dependent on the chemical composition, ranging from 502 Pa (Fmoc-F(2)/D) to 21.2 KPa (Fmoc-F(2)). All gels supported the viability of bovine chondrocytes as assessed by a live-dead staining assay. Fmoc-F(2)/S and Fmoc-F(2)/D hydrogels in addition supported viability for human dermal fibroblasts (HDF) while Fmoc-F(2)/S hydrogel was the only gel type that supported viability for all three cell types tested. Fmoc-F(2)/S was therefore investigated further by studying cell proliferation, cytoskeletal organization and histological analysis in 2D culture. In addition, the Fmoc-F(2)/S gel was shown to support retention of cell morphology in 3D culture of bovine chondrocytes. These results demonstrate that introduction of chemical functionality into Fmoc-peptide scaffolds may provide gels with tunable chemical and mechanical properties for in vitro cell culture.
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107
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DeClue MS, Monnard PA, Bailey JA, Maurer SE, Collis GE, Ziock HJ, Rasmussen S, Boncella JM. Nucleobase Mediated, Photocatalytic Vesicle Formation from an Ester Precursor. J Am Chem Soc 2008; 131:931-3. [DOI: 10.1021/ja808200n] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael S. DeClue
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - Pierre-Alain Monnard
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - James A. Bailey
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - Sarah E. Maurer
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - Gavin E. Collis
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - Hans-Joachim Ziock
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - Steen Rasmussen
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
| | - James M. Boncella
- Material, Physics and Applications Division, Earth and Environmental Sciences Division, Chemistry Division, Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, New Mexico 87545
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108
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Nagarkar RP, Hule RA, Pochan DJ, Schneider JP. De Novo Design of Strand-Swapped β-Hairpin Hydrogels. J Am Chem Soc 2008; 130:4466-74. [DOI: 10.1021/ja710295t] [Citation(s) in RCA: 121] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Radhika P. Nagarkar
- Departments of Chemistry and Biochemistry and Materials Science and Engineering and the Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19716
| | - Rohan A. Hule
- Departments of Chemistry and Biochemistry and Materials Science and Engineering and the Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19716
| | - Darrin J. Pochan
- Departments of Chemistry and Biochemistry and Materials Science and Engineering and the Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19716
| | - Joel P. Schneider
- Departments of Chemistry and Biochemistry and Materials Science and Engineering and the Delaware Biotechnology Institute, University of Delaware, Newark, Delaware 19716
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