1
|
Chan NJ, Lentz S, Gurr PA, Scheibel T, Qiao GG. Mimicry of silk utilizing synthetic polypeptides. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
2
|
Zhong J, Liu Y, Ren J, Tang Y, Qi Z, Zhou X, Chen X, Shao Z, Chen M, Kaplan DL, Ling S. Understanding Secondary Structures of Silk Materials via Micro- and Nano-Infrared Spectroscopies. ACS Biomater Sci Eng 2019; 5:3161-3183. [PMID: 33405510 DOI: 10.1021/acsbiomaterials.9b00305] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The secondary structures (also termed conformations) of silk fibroin (SF) in animal silk fibers and regenerated SF materials are critical in determining mechanical performance and function of the materials. In order to understand the structure-mechanics-function relationships of silk materials, a variety of advanced infrared spectroscopic techniques, such as micro-infrared spectroscopies (micro-IR spectroscopies for short), synchrotron micro-IR spectroscopy, and nano-infrared spectroscopies (nano-IR spectroscopies for short), have been used to determine the conformations of SF in silk materials. These IR spectroscopic methods provide a useful toolkit to understand conformations and conformational transitions of SF in various silk materials with spatial resolution from the nano-scale to the micro-scale. In this Review, we first summarize progress in understanding the structure and structure-mechanics relationships of silk materials. We then discuss the state-of-the-art micro- and nano-IR spectroscopic techniques used for silk materials characterization. We also provide a systematic discussion of the strategies to collect high-quality spectra and the methods to analyze these spectra. Finally, we demonstrate the challenges and directions for future exploration of silk-based materials with IR spectroscopies.
Collapse
Affiliation(s)
- Jiajia Zhong
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Yawen Liu
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Jing Ren
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| | - Yuzhao Tang
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China
| | - Xiaojie Zhou
- National Facility for Protein Science in Shanghai, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Xin Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, China
| | - Min Chen
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Shengjie Ling
- School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Shanghai 201210, China
| |
Collapse
|
3
|
Han Y, Ling S, Qi Z, Shao Z, Chen X. Application of far-infrared spectroscopy to the structural identification of protein materials. Phys Chem Chem Phys 2018; 20:11643-11648. [DOI: 10.1039/c8cp00802g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Far-IR spectroscopy was applied to monitor the structure of two types of silk fibroins and the results indicate that they both show several sharp characteristic peaks, which are totally different from those of globular proteins.
Collapse
Affiliation(s)
- Yanchen Han
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University
- Shanghai
- People's Republic of China
| | - Shengjie Ling
- School of Physical Science and Technology, ShanghaiTech University
- Shanghai
- People's Republic of China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China
- Hefei
- People's Republic of China
| | - Zhengzhong Shao
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University
- Shanghai
- People's Republic of China
| | - Xin Chen
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Laboratory of Advanced Materials, Fudan University
- Shanghai
- People's Republic of China
| |
Collapse
|
4
|
Balčytis A, Ryu M, Wang X, Novelli F, Seniutinas G, Du S, Wang X, Li J, Davis J, Appadoo D, Morikawa J, Juodkazis S. Silk: Optical Properties over 12.6 Octaves THz-IR-Visible-UV Range. MATERIALS (BASEL, SWITZERLAND) 2017; 10:E356. [PMID: 28772716 PMCID: PMC5507002 DOI: 10.3390/ma10040356] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/02/2017] [Accepted: 03/23/2017] [Indexed: 12/04/2022]
Abstract
Domestic (Bombyx mori) and wild (Antheraea pernyi) silk fibers were characterised over a wide spectral range from THz 8 cm -1 ( λ = 1.25 mm, f = 0.24 THz) to deep-UV 50 × 10 3 cm - 1 ( λ = 200 nm, f = 1500 THz) wavelengths or over a 12.6 octave frequency range. Spectral features at β-sheet, α-coil and amorphous fibroin were analysed at different spectral ranges. Single fiber cross sections at mid-IR were used to determine spatial distribution of different silk constituents and revealed an α-coil rich core and more broadly spread β-sheets in natural silk fibers obtained from wild Antheraea pernyi moths. Low energy T-ray bands at 243 and 229 cm -1 were observed in crystalline fibers of domestic and wild silk fibers, respectively, and showed no spectral shift down to 78 K temperature. A distinct 20±4 cm-1 band was observed in the crystalline Antheraea pernyi silk fibers. Systematic analysis and assignment of the observed spectral bands is presented. Water solubility and biodegradability of silk, required for bio-medical and sensor applications, are directly inferred from specific spectral bands.
Collapse
Affiliation(s)
- Armandas Balčytis
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- Department of Laser Technologies, Center for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
- These authors contributed equally to this work..
| | - Meguya Ryu
- Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
- These authors contributed equally to this work..
| | - Xuewen Wang
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- These authors contributed equally to this work..
| | - Fabio Novelli
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- Current address: Ruhr-University Bochum, 44801 Bochum, Germany..
| | - Gediminas Seniutinas
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- Current address: Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland..
| | - Shan Du
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, VIC 3220, Australia.
| | - Xungai Wang
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, VIC 3220, Australia.
| | - Jingliang Li
- Australian Future Fibres Research and Innovation Centre, Institute for Frontier Materials, Deakin University, Geelong, VIC 3220, Australia.
| | - Jeffrey Davis
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
| | - Dominique Appadoo
- Australian Synchrotron, Blackburn Road, Clayton, VIC 3168, Australia.
| | - Junko Morikawa
- Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8550, Japan.
| | - Saulius Juodkazis
- School of Science, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
- Melbourne Centre for Nanofabrication, the Victorian Node of the Australian National Fabrication Facility, 151 Wellington Rd., Clayton, VIC 3168, Australia.
| |
Collapse
|
5
|
Yatsyna V, Bakker DJ, Feifel R, Rijs AM, Zhaunerchyk V. Far-infrared amide IV-VI spectroscopy of isolated 2- and 4-Methylacetanilide. J Chem Phys 2017; 145:104309. [PMID: 27634262 DOI: 10.1063/1.4962360] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Delocalized molecular vibrations in the far-infrared and THz ranges are highly sensitive to the molecular structure, as well as to intra- and inter-molecular interactions. Thus, spectroscopic studies of biomolecular structures can greatly benefit from an extension of the conventional mid-infrared to the far-infrared wavelength range. In this work, the conformer-specific gas-phase far-infrared spectra of two aromatic molecules containing the peptide -CO-NH- link, namely, 2- and 4-Methylacetanilide, are investigated. The planar conformations with trans configuration of the peptide link have only been observed in the supersonic-jet expansion. The corresponding far-infrared signatures associated with the vibrations of the peptide -CO-NH- moiety, the so-called amide IV-VI bands, have been assigned and compared with the results of density functional theory frequency calculations based on the anharmonic vibrational second-order perturbation theory approach. The analysis of the experimental and theoretical data shows that the amide IV-VI bands are highly diagnostic for the geometry of the peptide moiety and the molecular backbone. They are also strongly blue-shifted upon formation of the NH⋯O-C hydrogen bonding, which is, for example, responsible for the formation of secondary protein structures. Furthermore, the amide IV-VI bands are also diagnostic for the cis configuration of the peptide link, which can be present in cyclic peptides. The experimental gas-phase data presented in this work can assist the vibrational assignment of similar biologically important systems, either isolated or in natural environments.
Collapse
Affiliation(s)
- Vasyl Yatsyna
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - Daniël J Bakker
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernoovield 7-c, 6525 ED Nijmegen, The Netherlands
| | - Raimund Feifel
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - Anouk M Rijs
- Institute for Molecules and Materials, FELIX Laboratory, Radboud University, Toernoovield 7-c, 6525 ED Nijmegen, The Netherlands
| | - Vitali Zhaunerchyk
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden
| |
Collapse
|
6
|
Vanhalle M, Corneillie S, Smet M, Van Puyvelde P, Goderis B. Poly(alanine): Structure and Stability of the d and l-Enantiomers. Biomacromolecules 2015; 17:183-91. [DOI: 10.1021/acs.biomac.5b01301] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maja Vanhalle
- Polymer
Chemistry and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan
200F, Leuven, 3001, Belgium
| | - Stijn Corneillie
- Polymer
Chemistry and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan
200F, Leuven, 3001, Belgium
| | - Mario Smet
- Polymer
Chemistry and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan
200F, Leuven, 3001, Belgium
| | - Peter Van Puyvelde
- Soft
Matter, Applied Rheology and Technology, Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Bart Goderis
- Polymer
Chemistry and Materials, Department of Chemistry, KU Leuven, Celestijnenlaan
200F, Leuven, 3001, Belgium
| |
Collapse
|
7
|
Itoh K, Ikeda A, Iwamoto T, Nishizawa S. DFT calculation analysis of terahertz time-domain spectra of polyalanines. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.04.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
8
|
Ding T, Huber T, Middelberg AP, Falconer RJ. Characterization of Low-Frequency Modes in Aqueous Peptides Using Far-Infrared Spectroscopy and Molecular Dynamics Simulation. J Phys Chem A 2011; 115:11559-65. [DOI: 10.1021/jp200553d] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tao Ding
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Australia
| | - Thomas Huber
- Research School of Chemistry, Australian National University, Canberra, Australia
| | - Anton P.J. Middelberg
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Australia
| | - Robert J. Falconer
- Department of Chemical and Biological Engineering, ChELSI Institute, University of Sheffield, Sheffield S1 3JD, England
| |
Collapse
|
9
|
Williams MRC, True AB, Izmaylov AF, French TA, Schroeck K, Schmuttenmaer CA. Terahertz spectroscopy of enantiopure and racemic polycrystalline valine. Phys Chem Chem Phys 2011; 13:11719-30. [PMID: 21603704 DOI: 10.1039/c1cp20594c] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Experimental and computational THz (or far-infrared) spectra of polycrystalline valine samples are reported. The experimental spectra have been measured using THz time-domain spectroscopy. Spectra of the pure enantiomers, both D and L, as well as the dl racemate have been taken at room temperature and low temperature (78 K). The spectra of the pure D and L enantiomers are essentially identical, and they are markedly different from the DL racemate. In addition, a temperature-dependent study of L-valine was undertaken in which the absorption maxima were found to red shift as a function of increasing temperature. The vibrational absorption spectra (frequencies and intensities) were calculated using the harmonic approximation with the Perdew-Burke-Ernzerhof (PBE) functional, localized atomic orbital basis sets, and periodic boundary conditions. The calculated and experimental spectra are in good qualitative agreement. A general method of quantifying the degree to which a calculated mode is intermolecular versus intramolecular is demonstrated, with the intermolecular motions further separated into translational versus rotational/librational motion. This allows straightforward comparison of spectra calculated using different basis sets or other constraints.
Collapse
Affiliation(s)
- Michael R C Williams
- Yale University, Department of Chemistry, PO Box 208107, 225 Prospect St., New Haven, CT 06520-8107, USA
| | | | | | | | | | | |
Collapse
|
10
|
Zakaria HA, Fischer BM, Bradley AP, Jones I, Abbott D, Middelberg APJ, Falconer RJ. Low-frequency spectroscopic analysis of monomeric and fibrillar lysozyme. APPLIED SPECTROSCOPY 2011; 65:260-4. [PMID: 21352645 DOI: 10.1366/10-06162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Terahertz time-domain spectroscopy (THz-TDS) and Fourier transform infrared (FT-IR) spectroscopy were used to generate far-infrared and low-frequency spectral measurements of monomeric lysozyme and lysozyme fibrils. The formation of lysozyme fibrils was verified by the Thioflavin T assay and transmission electron microscopy (TEM). It was evident in the FT-IR spectra that between 150 and 350 cm(-1) the two spectra diverge, with the lysozyme fibrils showing higher absorbance intensity than the monomeric form. The broad absorption phenomenon is likely due to light scattered from the fibrillar architecture of lysozyme fibrils as supported by simulation of Rayleigh light scattering. The lack of discrete phonon-like peaks suggest that far-infrared spectroscopy cannot detect vibrational modes between the highly ordered hydrogen-bonded beta-pleated sheets of the lysozyme subunit.
Collapse
Affiliation(s)
- Hidayatul A Zakaria
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072, Australia
| | | | | | | | | | | | | |
Collapse
|
11
|
Falconer RJ, Zakaria HA, Fan YY, Bradley AP, Middelberg APJ. Far-infrared spectroscopy of protein higher-order structures. APPLIED SPECTROSCOPY 2010; 64:1259-64. [PMID: 21073795 DOI: 10.1366/000370210793335025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Far-infrared (FIR) spectroscopy in the spectral region of 50-450 cm(-1) was used to study a series of protein higher-order structures constructed using β-lactoglobulin and polyomavirus capsid protein VP1. There were marked differences in the spectra for β-lactoglobulin monomer and dimer and between untreated β-lactoglobulin and heat-induced gels formed at neutral pH. Untreated β-lactoglobulin and heat-induced gels formed at acidic pH exhibited little difference in their spectra. Assembly of the quaternary structure of polyomavirus virus-like particles also caused large changes in the FIR spectra. These findings suggest that FIR spectroscopy may prove useful in studying some protein quaternary and higher-order structures. There was evidence of detection of β-lactoglobulin dimerization, intermolecular disulfide bonding in heat-induced neutral gels, and polyomavirus virus-like particle assembly but no evidence that FIR could detect β-lactoglobulin fibrils with their polymeric structure and hydrogen-bonded intermolecular β-pleated sheeting.
Collapse
Affiliation(s)
- Robert J Falconer
- The University of Queensland, NCRIS Biotechnology Products, Australian Institute for Bioengineering and Nanotechnology, Brisbane QLD 4072, Australia.
| | | | | | | | | |
Collapse
|
12
|
Nguyen KT, Le Clair SV, Ye S, Chen Z. Orientation determination of protein helical secondary structures using linear and nonlinear vibrational spectroscopy. J Phys Chem B 2009; 113:12169-80. [PMID: 19650636 PMCID: PMC2799944 DOI: 10.1021/jp904153z] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this paper, we systematically presented the orientation determination of protein helical secondary structures using vibrational spectroscopic methods, particularly, nonlinear sum frequency generation (SFG) vibrational spectroscopy, along with linear vibrational spectroscopic techniques such as infrared spectroscopy and Raman scattering. SFG amide I signals can be collected using different polarization combinations of the input laser beams and output signal beam to measure the second-order nonlinear optical susceptibility components of the helical amide I modes, which are related to their molecular hyperpolarizability elements through the orientation distribution of these helices. The molecular hyperpolarizability elements of amide I modes of a helix can be calculated based on the infrared transition dipole moment and Raman polarizability tensor of the helix; these quantities are determined by using the bond additivity model to sum over the individual infrared transition dipole moments and Raman polarizability tensors, respectively, of the peptide units (or the amino acid residues). The computed overall infrared transition dipole moment and Raman polarizability tensor of a helix can be validated by experimental data using polarized infrared and polarized Raman spectroscopy on samples with well-aligned helical structures. From the deduced SFG hyperpolarizability elements and measured SFG second-order nonlinear susceptibility components, orientation information regarding helical structures can be determined. Even though such orientation information can also be measured using polarized infrared or polarized Raman amide I signals, SFG has a much lower detection limit, which can be used to study the orientation of a helix when its surface coverage is much lower than a monolayer. In addition, the combination of different vibrational spectroscopic techniques, for example, SFG and attenuated total reflectance Fourier transform infrared spectroscopy, provides more measured parameters for orientation determination, aiding in the deduction of more complicated orientation distributions. In this paper, we discussed two types of helices, the alpha-helix and 3-10 helix. However, the orientation determination method presented here is general and thus can be applied to study other helices as well. The calculations of SFG amide I hyperpolarizability components for alpha-helical and 3-10 helical structures with different chain lengths have also been performed. It was found that when the helices reached a certain length, the number of peptide units in the helix should not alter the data analysis substantially. It was shown in the calculation, however, that when the helix chain is short, the SFG hyperpolarizability component ratios can vary substantially when the chain length is changed. Because 3-10 helical structures can be quite short in proteins, the orientation determination for a short 3-10 helix needs to take into account the number of peptide units in the helix.
Collapse
Affiliation(s)
- Khoi Tan Nguyen
- Department of Chemistry, 930 North University Avenue, University of Michigan, Ann Arbor, MI 48109
| | - Stéphanie V. Le Clair
- Department of Chemistry, 930 North University Avenue, University of Michigan, Ann Arbor, MI 48109
| | - Shuji Ye
- Department of Chemistry, 930 North University Avenue, University of Michigan, Ann Arbor, MI 48109
| | - Zhan Chen
- Department of Chemistry, 930 North University Avenue, University of Michigan, Ann Arbor, MI 48109
| |
Collapse
|
13
|
Maklakov LI, Aksakova SV. Low-frequency vibrational spectroscopy of amides and urethanes. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1997v066n05abeh000224] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
14
|
|
15
|
Misra RM, Saxena V, Tandon P, Gupta VD. Phonon Dispersion and Heat Capacity in β-Sheet Poly(L-alanine). Polym J 2005. [DOI: 10.1295/polymj.37.30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
16
|
Papamokos GV, Demetropoulos IN. Biomolecular Springs: Low-Frequency Collective Helical Vibrations of Ace-Glyn-NHMe (n = 3−8). A DFT Study Employing the PW91XC Functional. J Phys Chem A 2004. [DOI: 10.1021/jp049551s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- George V. Papamokos
- Department of Chemistry, Sector of Physical Chemistry, University of Ioannina, Panepistemioupoli Dourouti, 45110 Ioannina, Greece
| | - Ioannis N. Demetropoulos
- Department of Chemistry, Sector of Physical Chemistry, University of Ioannina, Panepistemioupoli Dourouti, 45110 Ioannina, Greece
| |
Collapse
|
17
|
Kricheldorf HR, Hauser K. Polylactones. 55. A-B-A triblock copolymers of various polypeptides. Syntheses involving 4-aminobenzoyl-terminated poly(epsilon-caprolactone) as B block. Biomacromolecules 2003; 2:1110-5. [PMID: 11777381 DOI: 10.1021/bm0100561] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A telechelic poly(epsilon-caprolactone) having a degree of polymerization (DP) around 25 and two 4-aminobenzoyl chain ends was used as a macroinitiator for the ring-opening polymerization of various alpha-amino acid N-carboxyanhydrides (NCAs). Glycine-NCA, L-alanine-NCA, L-phenylalanine-NCA, and gamma-benzyl-L-glutamate-NCA served as monomers and the NCA/macroinitiator ratio was varied between 20:1, 40:1, and 100:1. In the case of L-Phe-NCA, a ratio of 200:1 was also used. It was demonstrated by means of model studies, that the NCAs may react almost quantitatively with the 4-aminobenzoyl end groups despite their relatively low nucleophilicity. The isolated triblock copolymers were characterized by viscosity measurements and by (1)H NMR spectroscopy with regard to their composition (which in most cases paralleled the feed ratios). However, in the case of gamma-Bzl-Glu-NCA mixtures of di- and triblock copolymer were obtained. The secondary structures of the solid copolymers were examined by IR spectroscopy and (13)C NMR CP/MAS spectroscopy. It was found that the alpha-helix/beta-sheet ratio of the poly(L-Ala) and poly(L-Phe) blocks increases with their average length, according to the NCA/macroinitiator ratio.
Collapse
Affiliation(s)
- H R Kricheldorf
- Institut für Technische und Makromolekulare Chemie, Bundesstrasse 45, D-20146 Hamburg, Germany
| | | |
Collapse
|
18
|
Xie A, He Q, Miller L, Sclavi B, Chance MR. Low frequency vibrations of amino acid homopolymers observed by synchrotron far-ir absorption spectroscopy: Excited state effects dominate the temperature dependence of the spectra. Biopolymers 1999. [DOI: 10.1002/(sici)1097-0282(199906)49:7<591::aid-bip5>3.0.co;2-q] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
19
|
|
20
|
Lee DK, Ramamoorthy A. Determination of the Solid-State Conformations of Polyalanine Using Magic-Angle Spinning NMR Spectroscopy. J Phys Chem B 1998. [DOI: 10.1021/jp983811m] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dong-Kuk Lee
- Biophysics Research Division and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109-1055
| | - A. Ramamoorthy
- Biophysics Research Division and Department of Chemistry, The University of Michigan, Ann Arbor, Michigan 48109-1055
| |
Collapse
|
21
|
|
22
|
Uchida C, Wakamatsu K, Iizuka Y, Oguma K, Oya M. Synthesis and Properties of High-Molecular-Weight Polypeptides Containing Tryptophan III. Synthesis and Properties of Copolypeptides Containing 1- Nin-Formyltryptophan with Alanine. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1997. [DOI: 10.1246/bcsj.70.1709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
23
|
Iizuka Y, Endo T, Oya M. Synthesis and Properties of High Molecular Weight Polypeptides Containing of Tryptophan. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1991. [DOI: 10.1246/bcsj.64.1336] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Kennedy SD, Bryant RG. Hydration effects on dynamics of polyglycine and sodium poly(L-glutamate). Biopolymers 1990; 30:691-701. [PMID: 1703450 DOI: 10.1002/bip.360300705] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Solid state nmr methods were applied to the study of the motions and structural heterogeneity in polyglycine, sodium poly(L-glutamate), and poly(L-alanine). The response of both the main-chain and side-chain resonances to the addition of water was studied using static and magic-angle sample-spinning line shapes as well as the carbon spin-lattice relaxation times, the proton spin-lattice relaxation time in the rotating frame, and the proton-carbon cross-polarization time. The polyglycine motions are not drastically affected by the addition of water when the polymer is in the 3(1)-helix or the beta-sheet structure. The sodium poly(L-glutamate), however, responds to increased hydration with little motion in the main-chain carbon atoms, but considerable flexibility of the side-chain atoms. The greatest motions are reported for the C5 carbon with rotational amplitudes about the C4-C5 bond of about of 50 degrees. In addition, motions somewhat less than half this size are required closer to the main chain.
Collapse
Affiliation(s)
- S D Kennedy
- Department of Biophysics, University of Rochester Medical Center, New York 14642
| | | |
Collapse
|
25
|
Krimm S, Bandekar J. Vibrational spectroscopy and conformation of peptides, polypeptides, and proteins. ADVANCES IN PROTEIN CHEMISTRY 1986; 38:181-364. [PMID: 3541539 DOI: 10.1016/s0065-3233(08)60528-8] [Citation(s) in RCA: 1949] [Impact Index Per Article: 51.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
26
|
Yamanobe T, Ando I, Saito H, Tabeta R, Shoji A, Ozaki T. Carbon-13 NMR Chemical Shift and Electronic Structure of Solid Polypeptides as Studied by Tight-binding MO Theory. Polyglycine and Poly(L-alanine). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1985. [DOI: 10.1246/bcsj.58.23] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
27
|
Tipping M, Viras K, King TA. Low-frequency dynamics of solid poly(L-alanine) from Raman spectroscopy. Biopolymers 1984. [DOI: 10.1002/bip.360231213] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
28
|
Dwivedi AM, Krimm S. Vibrational analysis of peptides, polypeptides, and proteins. XVIII. Conformational sensitivity of the alpha-helix spectrum: alpha I- and alpha II-poly(L-alanine). Biopolymers 1984; 23:923-43. [PMID: 6713082 DOI: 10.1002/bip.360230509] [Citation(s) in RCA: 69] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
29
|
Saitô H, Tabeta R, Ando I, Ozaki T, Shoji A. A HIGH RESOLUTION13C NMR STUDY OF SOLID POLY (β-BENZYL-L-ASPARTATE) BY THE CROSS POLARIZATION-MAGIC ANGLE SPINNING METHOD. DISTINCTION OF THE RIGHT-HANDED α-HELIX, LEFT-HANDED α-HELIX, ω-HELIX, AND β-SHEET FORMS BY CONFORMATION-DEPENDENT13C CHEMICAL SHIFTS. CHEM LETT 1983. [DOI: 10.1246/cl.1983.1437] [Citation(s) in RCA: 38] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
30
|
Ozaki T, Oya M, Itoh K. Conformational Study of Sequential Polypeptides of L-Alanine and D-Alanine. Polym J 1981. [DOI: 10.1295/polymj.13.225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
31
|
Sederel WL, Bantjes A, Feijen J, Anderson JM. Solid-state conformation of copolymers of ?-benzyl-L-aspartate withL-alanine,L-leucine,L-valine, ?-benzyl-L-glutamate, or ?-carbobenzoxy-L-lysine. Biopolymers 1980. [DOI: 10.1002/bip.1980.360190905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
32
|
Katakai R. SUCCESSIVE SHORT GLYCYL SEQUENCE PROHIBITING FORMATION OF ASSOCIATED β-STRUCTURE IN THE PRECIPITATION. CHEM LETT 1980. [DOI: 10.1246/cl.1980.909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
33
|
Moore WH, Krimm S. Vibrational analysis of peptides, polypeptides, and proteins. II. beta-poly(L-alanine) and beta-poly(L-anaylglycine). Biopolymers 1976; 15:2465-83. [PMID: 1000052 DOI: 10.1002/bip.1976.360151211] [Citation(s) in RCA: 121] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
34
|
|
35
|
Kirin D, Colombo L, Furić K, Meier W. Low-frequency vibrational spectrum of the 1-methyl-thymine single crystal. ACTA ACUST UNITED AC 1975. [DOI: 10.1016/0584-8539(75)80115-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
36
|
Frushour BG, Koenig JL. Raman spectroscopic study of poly (?-benzyl-L-aspartate) and sequential polypeptides. Biopolymers 1975. [DOI: 10.1002/bip.1975.360141011] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
37
|
Ito K, Fasman GD. Poly(L-valine). Conformational dependence on the degree of polymerization: infrared studies. Biopolymers 1975; 14:1755-67. [PMID: 1156663 DOI: 10.1002/bip.1975.360140815] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
38
|
Frushour BG, Koenig JL. Raman spectra of D and L amino acid copolymers. Poly-DL-alanine, poly-DL-leucine, and poly-DL-lysine. Biopolymers 1975; 14:363-77. [PMID: 1174667 DOI: 10.1002/bip.1975.360140210] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
39
|
|
40
|
|
41
|
|
42
|
|
43
|
Ito K, Katabuchi H. Far-infrared spectra of sequential polypeptides with -helical and polyglycine II structures. Biopolymers 1973; 12:921-9. [PMID: 4695685 DOI: 10.1002/bip.1973.360120419] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
44
|
Chirgadze YN, Ovsepyan AM. Observation of small conformational changes in the sperm-whale myoglobin by the far-infrared spectra. Biopolymers 1973. [DOI: 10.1002/bip.1973.360120315] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
45
|
Finegold L, Cude JL. Poly(L-alanine): investigation of alpha-helix and beta-sheet forms by low-temperature specific heat measurements (1.5-20 degrees K). Biopolymers 1972; 11:2483-91. [PMID: 4649729 DOI: 10.1002/bip.1972.360111208] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
46
|
|
47
|
Ito K, Katabuchi H, Shimanouchi T. Far-infrared bands of amino-acid residues with -helical and -form conformations. NATURE: NEW BIOLOGY 1972; 239:42-3. [PMID: 4507210 DOI: 10.1038/newbio239042a0] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
|
48
|
|
49
|
Ito K, Katabuchi H. Far-infrared spectra of sequential copolymers of amino acids with alkyl group side chains. Biopolymers 1972; 11:1593-605. [PMID: 5056084 DOI: 10.1002/bip.1972.360110806] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
50
|
|