151
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Compared binding properties between resveratrol and other polyphenols to plasmatic albumin: consequences for the health protecting effect of dietary plant microcomponents. Molecules 2014; 19:17066-77. [PMID: 25347454 PMCID: PMC6270862 DOI: 10.3390/molecules191117066] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2014] [Revised: 10/07/2014] [Accepted: 10/09/2014] [Indexed: 01/09/2023] Open
Abstract
Phytophenols are considered to have beneficial effects towards human physiology. They are food microcomponents with potent chemopreventive properties towards the most three frequent contemporary human diseases, e.g., cardiovascular alterations, cancer and neurodegenerative pathologies. Related to this, the plasmatic form and plasmatic level of plant polyphenols in the body circulation are crucial for their efficiency. Thus, determinations of the binding process of resveratrol and of common flavonoids produced by major edible plants, berries and fruits to plasma proteins are essential. The interactions between resveratrol and albumin, a major plasma protein, were compared with those already published, involving curcumin, genistein, quercetin and other well-known food-containing polyphenols. The approaches used are usually intrinsic fluorescence intensity changes, quenching of protein intrinsic fluorescence and infrared spectroscopy. It appears that: (1) all of the studied polyphenols interact with albumin; (2) while most of the studied polyphenols interact at one albumin binding site, there are two different types of resveratrol binding sites for bovine serum albumin, one with the highest affinity (apparent KD of 4 µM) with a stoichiometry of one per monomer and a second with a lower affinity (apparent KD of 20 µM) with also a stoichiometry of one per monomer; (3) at least one binding site is in the vicinity of one tryptophanyl residue of bovine serum albumin; and (4) resveratrol binding to bovine serum albumin produces a very small structural conformation change of the polypeptide chain. These results support a role played by polyphenols-albumin interactions in the plasma for the bio-activities of these food microcomponents in the body.
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152
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Ausili A, Staiano M, Marabotti A, D'Auria G, Gómez-Fernández JC, Torrecillas A, Ortiz A, D'Auria S. Correlation between fluorescence and structure in the orange-emitting GFP-like protein, monomeric Kusabira Orange. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2014; 138:223-229. [PMID: 24980638 DOI: 10.1016/j.jphotobiol.2014.04.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 04/23/2014] [Indexed: 06/03/2023]
Abstract
The mKO is the monomeric version of Kusabira Orange, a GFP-like protein emitting bright orange fluorescence at 559 nm. This protein shows the characteristic β-barrel motif typical of the fluorescent protein family which it belongs to, similar spectral properties to the tetrameric form and an exceptional photo-stability to pH changes. Here, we demonstrate that mKO in solution at physiological pH exhibits a secondary structure analogue to that of the crystal. Moreover, we describe the thermal unfolding, revealing an outstanding structural stability with a denaturation temperature close to 90 °C and identifying the existence of a thermodynamic intermediate. The denaturation process of mKO results to be absolutely irreversible because of the complete lost of the native structure and the consequent aggregation, while the presence of the intermediate state is most likely due to coexistence of two different species of mKO, with protonated and deprotonated chromophore respectively, that affects the fluorescence properties and the structural stability of the protein.
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Affiliation(s)
- A Ausili
- Laboratory for Molecular Sensing, IBP-CNR, Naples, Italy.
| | - M Staiano
- Laboratory for Molecular Sensing, IBP-CNR, Naples, Italy
| | - A Marabotti
- Department of Chemistry and Biology, University of Salerno, Fisciano (SA), Italy
| | - G D'Auria
- Laboratory for Molecular Sensing, IBP-CNR, Naples, Italy; Department of Chemistry and Biology, University of Salerno, Fisciano (SA), Italy
| | - J C Gómez-Fernández
- Departamento de Bioquimica y Biologia Molecular-A, University of Murcia, Spain
| | - A Torrecillas
- Departamento de Bioquimica y Biologia Molecular-A, University of Murcia, Spain
| | - A Ortiz
- Departamento de Bioquimica y Biologia Molecular-A, University of Murcia, Spain
| | - S D'Auria
- Laboratory for Molecular Sensing, IBP-CNR, Naples, Italy.
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153
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Sanii B, Martinez-Avila O, Simpliciano C, Zuckermann RN, Habelitz S. Matching 4.7-Å XRD spacing in amelogenin nanoribbons and enamel matrix. J Dent Res 2014; 93:918-22. [PMID: 25048248 PMCID: PMC4213250 DOI: 10.1177/0022034514544216] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 06/21/2014] [Accepted: 06/29/2014] [Indexed: 11/15/2022] Open
Abstract
The recent discovery of conditions that induce nanoribbon structures of amelogenin protein in vitro raises questions about their role in enamel formation. Nanoribbons of recombinant human full-length amelogenin (rH174) are about 17 nm wide and self-align into parallel bundles; thus, they could act as templates for crystallization of nanofibrous apatite comprising dental enamel. Here we analyzed the secondary structures of nanoribbon amelogenin by x-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) and tested if the structural motif matches previous data on the organic matrix of enamel. XRD analysis showed that a peak corresponding to 4.7 Å is present in nanoribbons of amelogenin. In addition, FTIR analysis showed that amelogenin in the form of nanoribbons was comprised of β-sheets by up to 75%, while amelogenin nanospheres had predominantly random-coil structure. The observation of a 4.7-Å XRD spacing confirms the presence of β-sheets and illustrates structural parallels between the in vitro assemblies and structural motifs in developing enamel.
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Affiliation(s)
- B Sanii
- Lawrence Berkeley National Laboratory, Molecular Foundry, Berkeley, CA 94720, USA Keck Science Department, Claremont McKenna, Scripps and Pitzer Colleges, Claremont, CA 91711, USA
| | - O Martinez-Avila
- University of California, Department of Preventive and Restorative Dental Sciences, San Francisco, CA 94143, USA
| | - C Simpliciano
- University of California, Department of Preventive and Restorative Dental Sciences, San Francisco, CA 94143, USA
| | - R N Zuckermann
- Lawrence Berkeley National Laboratory, Molecular Foundry, Berkeley, CA 94720, USA
| | - S Habelitz
- University of California, Department of Preventive and Restorative Dental Sciences, San Francisco, CA 94143, USA
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154
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Van Gough D, Wheeler JS, Cheng S, Stevens MJ, Spoerke ED. Supramolecular assembly of asymmetric self-neutralizing amphiphilic peptide wedges. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9201-9209. [PMID: 25003982 DOI: 10.1021/la501620g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Mimicking the remarkable dynamic and multifunctional utility of biological nanofibers, such as microtubules, is a challenging and technologically attractive objective in synthetic supramolecular chemistry. Understanding the complex molecular interactions that govern the assembly of synthetic materials, such as peptides, is key to meeting this challenge. Using molecular dynamics simulations to guide molecular design, we explore here the self-assembly of structurally and functionally asymmetric wedge-shaped peptides. Supramolecular assembly into nanofiber gels or multilayered lamellar structures was determined by cooperative influences of hydrogen bonding, amphiphilicity (hydrophilic asymmetry), and the distribution of electrostatic charges on the aqueous self-assembly of asymmetric peptides. Molecular amphiphilicity and β-sheet forming capacity were both identified as necessary, but not independently sufficient, to form supramolecular nanofibers. Imbalances in positive and negative charges prevented nanofiber assembly, while the asymmetric distribution of balanced charges within a peptide is believed to affect peptide conformation and subsequent self-assembly into either nanofibers or lamellar structures. Insights into cooperative molecular interactions and the effects of molecular asymmetry on assembly may aid the development of next-generation supramolecular nanomaterial assemblies.
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Affiliation(s)
- Dara Van Gough
- Electronic, Optical, and Nano Materials, and ‡Computational Materials and Data Science, Sandia National Laboratories , Albuquerque, New Mexico 87185-1411, United States
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155
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Panciera M, Amorín M, Granja JR. Molecular Pom Poms from Self-Assembling α,γ-Cyclic Peptides. Chemistry 2014; 20:10260-5. [DOI: 10.1002/chem.201403319] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Indexed: 02/02/2023]
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156
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Ma Y, Fu X, Shen Y, Fu W, Li Z. Irreversible Low Critical Solution Temperature Behaviors of Thermal-responsive OEGylated Poly(l-cysteine) Containing Disulfide Bonds. Macromolecules 2014. [DOI: 10.1021/ma501104s] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yinan Ma
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaohui Fu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yong Shen
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wenxin Fu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhibo Li
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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157
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Correa W, Manrique-Moreno M, Patiño E, Peláez-Jaramillo C, Kaconis Y, Gutsmann T, Garidel P, Heinbockel L, Brandenburg K. Galleria mellonella native and analogue peptides Gm1 and ΔGm1. I) biophysical characterization of the interaction mechanisms with bacterial model membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2728-38. [PMID: 25017800 DOI: 10.1016/j.bbamem.2014.07.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Revised: 04/29/2014] [Accepted: 07/01/2014] [Indexed: 10/25/2022]
Abstract
Natural occurring antimicrobial peptides (AMPs) are important components of the innate immune system of animals and plants. They are considered to be promising alternatives to conventional antibiotics. Here we present a comparative study of two synthetic peptides: Gm1, corresponding to the natural overall uncharged peptide from Galleria mellonella (Gm) and ΔGm1, a modified overall positively charged Gm1 variant. We have studied the interaction of the peptides with lipid membranes composed of different kinds of lipopolysaccharides (LPS) and dimyristoylphosphatidylglycerol (DMPG), in some cases also dimyristoylphosphatidylethanolamine (DMPE) as representative lipid components of Gram-negative bacterial membranes, by applying Fourier-transform infrared spectroscopy (FTIR), Förster resonance energy transfer spectroscopy (FRET), differential scanning calorimetry (DSC) and isothermal titration calorimetry (ITC). Gm1 generates a destabilizing effect on the gel to liquid crystalline phase transition of the acyl chains of the lipids, as deduced from a decrease in the phase transition temperature and enthalpy, suggesting a fluidization, whereas ΔGm1 led to the opposite behavior. Further, FTIR analysis of the functional groups of the lipids participating in the interaction with the peptides indicated a shift in the band position and intensity of the asymmetric PO2(-) stretching vibration originating from the lipid phosphate groups, a consequence of the sterical changes in the head group region. Interestingly, FRET spectroscopy showed a similar intercalation of both peptides into the DMPG and LPS, but much less into the DMPE membrane systems. These results are discussed in the light of a possible use of the peptides as antimicrobial and anti-endotoxin drugs.
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Affiliation(s)
- Wilmar Correa
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Marcela Manrique-Moreno
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Edwin Patiño
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Carlos Peláez-Jaramillo
- Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, AA. 1226 Medellín, Colombia.
| | - Yani Kaconis
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
| | - Thomas Gutsmann
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
| | - Patrick Garidel
- Martin-Luther-University Halle/Wittenberg, Department of Chemistry/Physical Chemistry, D-06120 Halle/Saale, Germany.
| | - Lena Heinbockel
- Forschungszentrum Borstel, LG Biophysik, D-23845 Borstel, Germany.
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158
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Zhang X, Zhao Y, Xu Y, Pan Y, Chen F, Kumar A, Zou G, Liang XJ. In situ self-assembly of peptides in glucan particles for macrophage-targeted oral delivery. J Mater Chem B 2014; 2:5882-5890. [DOI: 10.1039/c4tb00626g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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159
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Sahoo B, Singer D, Kodali R, Zuchner T, Wetzel R. Aggregation behavior of chemically synthesized, full-length huntingtin exon1. Biochemistry 2014; 53:3897-907. [PMID: 24921664 PMCID: PMC4075985 DOI: 10.1021/bi500300c] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
Repeat
length disease thresholds vary among the 10 expanded polyglutamine
(polyQ) repeat diseases, from about 20 to about 50 glutamine residues.
The unique amino acid sequences flanking the polyQ segment are thought
to contribute to these repeat length thresholds. The specific portions
of the flanking sequences that modulate polyQ properties are not always
clear, however. This ambiguity may be important in Huntington’s
disease (HD), for example, where in vitro studies
of aggregation mechanisms have led to distinctly different mechanistic
models. Most in vitro studies of the aggregation
of the huntingtin (HTT) exon1 fragment implicated in the HD mechanism
have been conducted on inexact molecules that are imprecise either
on the N-terminus (recombinantly produced peptides) or on the C-terminus
(chemically synthesized peptides). In this paper, we investigate the
aggregation properties of chemically synthesized HTT exon1 peptides
that are full-length and complete, containing both normal and expanded
polyQ repeat lengths, and compare the results directly to previously
investigated molecules containing truncated C-termini. The results
on the full-length peptides are consistent with a two-step aggregation
mechanism originally developed based on studies of the C-terminally
truncated analogues. Thus, we observe relatively rapid formation of
spherical oligomers containing from 100 to 600 HTT exon1 molecules
and intermediate formation of short protofibril-like structures containing
from 500 to 2600 molecules. In contrast to this relatively rapid assembly,
mature HTT exon1 amyloid requires about one month to dissociate in vitro, which is similar to the time required for neuronal
HTT exon1 aggregates to disappear in vivo after HTT
production is discontinued.
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Affiliation(s)
- Bankanidhi Sahoo
- Department of Structural Biology and Pittsburgh Institute for Neurodegenerative Diseases, University of Pittsburgh School of Medicine , Pittsburgh, Pennsylvania 15260, United States
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160
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Marsh BM, Duffy EM, Soukup MT, Zhou J, Garand E. Intramolecular Hydrogen Bonding Motifs in Deprotonated Glycine Peptides by Cryogenic Ion Infrared Spectroscopy. J Phys Chem A 2014; 118:3906-12. [DOI: 10.1021/jp501936b] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Brett M. Marsh
- Department
of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Erin M. Duffy
- Department
of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Michael T. Soukup
- Department
of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Jia Zhou
- Department
of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Etienne Garand
- Department
of Chemistry, University of Wisconsin, 1101 University Avenue, Madison, Wisconsin 53706, United States
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161
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Yamamoto S, Furukawa T, Bouř P, Ozaki Y. Solvated States of Poly-l-alanine α-Helix Explored by Raman Optical Activity. J Phys Chem A 2014; 118:3655-62. [DOI: 10.1021/jp500794s] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shigeki Yamamoto
- Department
of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Tatsuya Furukawa
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Petr Bouř
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences, 166 10 Prague, Czech Republic
| | - Yukihiro Ozaki
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
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162
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Joshi AS, Thakur AK. Biodegradable delivery system containing a peptide inhibitor of polyglutamine aggregation: a step toward therapeutic development in Huntington's disease. J Pept Sci 2014; 20:630-9. [DOI: 10.1002/psc.2640] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2013] [Revised: 03/19/2014] [Accepted: 03/21/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Abhayraj S. Joshi
- Department of Biological Sciences and Bioengineering; Indian Institute of Technology; Kanpur Uttar Pradesh 208016 India
| | - Ashwani Kumar Thakur
- Department of Biological Sciences and Bioengineering; Indian Institute of Technology; Kanpur Uttar Pradesh 208016 India
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163
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Lhor M, Bernier SC, Horchani H, Bussières S, Cantin L, Desbat B, Salesse C. Comparison between the behavior of different hydrophobic peptides allowing membrane anchoring of proteins. Adv Colloid Interface Sci 2014; 207:223-39. [PMID: 24560216 PMCID: PMC4028306 DOI: 10.1016/j.cis.2014.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 01/11/2014] [Accepted: 01/13/2014] [Indexed: 10/25/2022]
Abstract
Membrane binding of proteins such as short chain dehydrogenase reductases or tail-anchored proteins relies on their N- and/or C-terminal hydrophobic transmembrane segment. In this review, we propose guidelines to characterize such hydrophobic peptide segments using spectroscopic and biophysical measurements. The secondary structure content of the C-terminal peptides of retinol dehydrogenase 8, RGS9-1 anchor protein, lecithin retinol acyl transferase, and of the N-terminal peptide of retinol dehydrogenase 11 has been deduced by prediction tools from their primary sequence as well as by using infrared or circular dichroism analyses. Depending on the solvent and the solubilization method, significant structural differences were observed, often involving α-helices. The helical structure of these peptides was found to be consistent with their presumed membrane binding. Langmuir monolayers have been used as membrane models to study lipid-peptide interactions. The values of maximum insertion pressure obtained for all peptides using a monolayer of 1,2-dioleoyl-sn-glycero-3-phospho-ethanolamine (DOPE) are larger than the estimated lateral pressure of membranes, thus suggesting that they bind membranes. Polarization modulation infrared reflection absorption spectroscopy has been used to determine the structure and orientation of these peptides in the absence and in the presence of a DOPE monolayer. This lipid induced an increase or a decrease in the organization of the peptide secondary structure. Further measurements are necessary using other lipids to better understand the membrane interactions of these peptides.
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Affiliation(s)
- Mustapha Lhor
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada
| | - Sarah C Bernier
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada
| | - Habib Horchani
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada
| | - Sylvain Bussières
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada
| | - Line Cantin
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada
| | - Bernard Desbat
- CBMN-UMR 5248 CNRS, Université de Bordeaux, IPB, Allée Geoffroy Saint Hilaire, 33600 Pessac, France
| | - Christian Salesse
- CUO-Recherche, Centre de recherche du CHU de Québec, Hôpital du Saint-Sacrement, Département d'ophtalmologie, Faculté de médecine, Université Laval, Québec, Québec G1V 0A6, Canada; Regroupement stratégique PROTEO, Université Laval, Québec, Québec G1V 0A6, Canada.
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164
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Lin D, Luo Y, Wu S, Ma Q, Wei G, Yang X. Investigation of the aggregation process of amyloid-β-(16-22) peptides and the dissolution of intermediate aggregates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3170-3175. [PMID: 24588450 DOI: 10.1021/la4048165] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aggregation processes of amyloid-β-(16-22) peptides (Aβ16-22) are investigated by atomic force microscopy (AFM). It is found that Aβ16-22 peptides quickly aggregate from monomers to oligomers and flakelike structures and finally to fibrils. In particular, unusual morphology change is observed in an early stage of aggregation; that is, the originally formed flakelike structures would disappear in the following aggregation processes. To determine the evolution of the flakelike structures, in situ AFM imaging is carried out in liquid to reveal the real-time morphology change of Aβ16-22. The results provide clear evidence that the flakelike structures are in an unstable intermediate state, which would be dissolved into oligomers or short protofibrils for reorganization. Further fluorescence and attenuated total reflectance Fourier transform infrared (ATR-FTIR) experiments on thioflavin T(ThT) suggest that those flakelike structures contain β-sheet components.
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Affiliation(s)
- Dongdong Lin
- State Key Laboratory of Surface Physics, Fudan University , 220 Handan Road, Shanghai 200433, PR China
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165
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Castelletto V, Hamley IW, Segarra-Maset MD, Gumbau CB, Miravet JF, Escuder B, Seitsonen J, Ruokolainen J. Tuning chelation by the surfactant-like peptide A6H using predetermined pH values. Biomacromolecules 2014; 15:591-8. [PMID: 24369761 PMCID: PMC3922418 DOI: 10.1021/bm401640j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/21/2013] [Indexed: 12/17/2022]
Abstract
We examine the self-assembly of a peptide A6H comprising a hexa-alanine sequence A6 with a histidine (H) "head group", which chelates Zn(2+) cations. We study the self-assembly of A6H and binding of Zn(2+) ions in ZnCl2 solutions, under acidic and neutral conditions. A6H self-assembles into nanotapes held together by a β-sheet structure in acidic aqueous solutions. By dissolving A6H in acidic ZnCl2 solutions, the carbonyl oxygen atoms in A6H chelate the Zn(2+) ions and allow for β-sheet formation at lower concentrations, consequently reducing the onset concentration for nanotape formation. A6H mixed with water or ZnCl2 solutions under neutral conditions produces short sheets or pseudocrystalline tapes, respectively. The imidazole ring of A6H chelates Zn(2+) ions in neutral solutions. The internal structure of nanosheets and pseudocrystalline sheets in neutral solutions is similar to the internal structure of A6H nanotapes in acidic solutions. Our results show that it is possible to induce dramatic changes in the self-assembly and chelation sites of A6H by changing the pH of the solution. However, it is likely that the amphiphilic nature of A6H determines the internal structure of the self-assembled aggregates independent from changes in chelation.
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Affiliation(s)
- V Castelletto
- School of Chemistry, Food Science and Pharmacy, University of Reading , Whiteknights, Reading RG6 6AD, United Kingdom
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166
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Abstract
One of the most versatile methods for monitoring the structure of proteins, either in solution or in the solid state, is Fourier transform infrared spectroscopy. Also known as mid-range infrared, which covers the frequency range from 4000 to 400 cm(-1), this wavelength region includes bands that arise from three conformationally sensitive vibrations within the peptide backbone (amide I, II and III). Of these vibrations, amide I is the most widely used and can provide information on secondary structure composition and structural stability. One of the advantages of infrared spectroscopy is that it can be used with proteins that are either in solution or in the solid state. The use of infrared to monitor protein structure and stability is summarized herein. In addition, specialized infrared methods are presented, such as techniques for the study of membrane proteins and oriented samples. In addition, there is a growing body of literature on the use of infrared to follow reaction kinetics and ligand binding in proteins, as well as a number of infrared studies on protein dynamics. Finally, the potential for using near-infrared spectroscopy to study protein structure is introduced.
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167
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Vasudev MC, Koerner H, Singh KM, Partlow BP, Kaplan DL, Gazit E, Bunning TJ, Naik RR. Vertically Aligned Peptide Nanostructures Using Plasma-Enhanced Chemical Vapor Deposition. Biomacromolecules 2014; 15:533-40. [DOI: 10.1021/bm401491k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Milana C. Vasudev
- Soft
Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Hilmar Koerner
- Soft
Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Kristi M. Singh
- Soft
Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Benjamin P. Partlow
- Department
of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - David L. Kaplan
- Department
of Biomedical Engineering, Tufts University, Medford, Massachusetts 02155, United States
| | - Ehud Gazit
- Molecular
Biology and Biotechnology Department, Tel Aviv University, Tel Aviv 69978, Israel
| | - Timothy J. Bunning
- Soft
Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Rajesh R. Naik
- Soft
Matter Materials Branch, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
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168
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Amorín M, Pérez A, Barberá J, Ozores HL, Serrano JL, Granja JR, Sierra T. Liquid crystal organization of self-assembling cyclic peptides. Chem Commun (Camb) 2014; 50:688-90. [DOI: 10.1039/c3cc47400c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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169
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Zeng G, Liu L, Xia D, Li Q, Xin Z, Wang J, Besenbacher F, Skrydstrup T, Dong M. Transition of chemically modified diphenylalanine peptide assemblies revealed by atomic force microscopy. RSC Adv 2014. [DOI: 10.1039/c3ra46718j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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170
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Bayat S, Tejo BA, Abdulmalek E, Salleh AB, Normi YM, Abdul Rahman MB. Rational design of mimetic peptides based on aldo-ketoreductase enzyme as asymmetric organocatalysts in aldol reactions. RSC Adv 2014. [DOI: 10.1039/c4ra04866k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Excellent yield (up to 97%), enantioselectivity (up to 99%) and diastereoselectivity (up to 99/1) were obtained using mimetic peptides.
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Affiliation(s)
- Saadi Bayat
- Enzyme and Microbial Technology Research Centre
- Universiti Putra Malaysia
- 43400 Serdang, Malaysia
- Department of Chemistry
- Faculty of Science
| | - Bimo A. Tejo
- Center for Infectious Diseases Research Surya University
- Jl. Scientia
- Tangerang 15810, Indonesia
| | - Emilia Abdulmalek
- Enzyme and Microbial Technology Research Centre
- Universiti Putra Malaysia
- 43400 Serdang, Malaysia
- Department of Chemistry
- Faculty of Science
| | - Abu Bakar Salleh
- Enzyme and Microbial Technology Research Centre
- Universiti Putra Malaysia
- 43400 Serdang, Malaysia
| | - Yahaya M. Normi
- Enzyme and Microbial Technology Research Centre
- Universiti Putra Malaysia
- 43400 Serdang, Malaysia
| | - Mohd Basyaruddin Abdul Rahman
- Enzyme and Microbial Technology Research Centre
- Universiti Putra Malaysia
- 43400 Serdang, Malaysia
- Department of Chemistry
- Faculty of Science
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171
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Maity S, Nir S, Zada T, Reches M. Self-assembly of a tripeptide into a functional coating that resists fouling. Chem Commun (Camb) 2014; 50:11154-7. [DOI: 10.1039/c4cc03578j] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A short peptide (tripeptide) self-assembles into a supramolecular functional coating with antifouling activity. This coating can be useful in applications where the adsorption of proteins, bacteria and other organisms should be avoided.
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Affiliation(s)
- Sibaprasad Maity
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology
- The Hebrew University of Jerusalem
- Jerusalem 91904, Israel
| | - Sivan Nir
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology
- The Hebrew University of Jerusalem
- Jerusalem 91904, Israel
| | - Tal Zada
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology
- The Hebrew University of Jerusalem
- Jerusalem 91904, Israel
| | - Meital Reches
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology
- The Hebrew University of Jerusalem
- Jerusalem 91904, Israel
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172
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Chen C, Wu D, Fu W, Li Z. Tunable Organogelator from Alkyl-Polypeptide Diblock Prepared by Ring-Opening Polymerization. Aust J Chem 2014. [DOI: 10.1071/ch13349] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three alkyl-polypeptide hybrid amphiphiles were synthesized by the ring-opening polymerization (ROP) of γ-(2-methoxyethoxy)esteryl-l-glutamate N-carboxyanhydride (l-EG1Glu NCA) using alkylamine, i.e. C6H13NH2, C14H29NH2, and C16H33NH2, as initiators. As-prepared alkyl-poly-l-EG1Glu hybrids were found to form clear organogels in several organic solvents at low concentration. FTIR and circular dichroism characterizations suggested that poly-l-EG1Glu formed a predominantly β-sheet conformation, which accounted for the gelation. Transmission electron and atomic force microscopy characterizations revealed that these copolymers formed nanoribbon structures in THF.
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173
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Yuran S, Reches M. Formation of ordered biomolecular structures by the self-assembly of short peptides. J Vis Exp 2013:e50946. [PMID: 24301009 DOI: 10.3791/50946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
In nature, complex functional structures are formed by the self-assembly of biomolecules under mild conditions. Understanding the forces that control self-assembly and mimicking this process in vitro will bring about major advances in the areas of materials science and nanotechnology. Among the available biological building blocks, peptides have several advantages as they present substantial diversity, their synthesis in large scale is straightforward, and they can easily be modified with biological and chemical entities(1,2). Several classes of designed peptides such as cyclic peptides, amphiphile peptides and peptide-conjugates self-assemble into ordered structures in solution. Homoaromatic dipeptides, are a class of short self-assembled peptides that contain all the molecular information needed to form ordered structures such as nanotubes, spheres and fibrils(3-8). A large variety of these peptides is commercially available. This paper presents a procedure that leads to the formation of ordered structures by the self-assembly of homoaromatic peptides. The protocol requires only commercial reagents and basic laboratory equipment. In addition, the paper describes some of the methods available for the characterization of peptide-based assemblies. These methods include electron and atomic force microscopy and Fourier-Transform Infrared Spectroscopy (FT-IR). Moreover, the manuscript demonstrates the blending of peptides (coassembly) and the formation of a "beads on a string"-like structure by this process.(9) The protocols presented here can be adapted to other classes of peptides or biological building blocks and can potentially lead to the discovery of new peptide-based structures and to better control of their assembly.
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Affiliation(s)
- Sivan Yuran
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem
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174
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Castelletto V, Gouveia RM, Connon CJ, Hamley IW, Seitsonen J, Nykänen A, Ruokolainen J. Alanine-rich amphiphilic peptide containing the RGD cell adhesion motif: a coating material for human fibroblast attachment and culture. Biomater Sci 2013; 2:362-369. [PMID: 32481862 DOI: 10.1039/c3bm60232j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
We studied the self-assembly of peptide A6RGD (A: alanine, R: arginine, G: glycine, D: aspartic acid) in water, and the use of A6RGD substrates as coatings to promote the attachment of human cornea stromal fibroblasts (hCSFs). The self-assembled motif of A6RGD was shown to depend on the peptide concentration in water, where both vesicle and fibril formation were observed. Oligomers were detected for 0.7 wt% A6RGD, which evolved into short peptide fibres at 1.0 wt% A6RGD, while a co-existence of vesicles and long peptide fibres was revealed for 2-15 wt% A6RGD. A6RGD vesicle walls were shown to have a multilayer structure built out of highly interdigitated A6 units, while A6RGD fibres were based on β-sheet assemblies. Changes in the self-assembly motif with concentration were reflected in the cell culture assay results. Films dried from 0.1-1.0 wt% A6RGD solutions allowed hCSFs to attach and significantly enhanced cell proliferation relative to the control. In contrast, films dried from 2.5 wt% A6RGD solutions were toxic to hCSFs.
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Affiliation(s)
- V Castelletto
- School of Chemistry, Food Science and Pharmacy, University of Reading, Whiteknights, Reading RG6 6AD, UK.
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175
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Louros NN, Iconomidou VA, Tsiolaki PL, Chrysina ED, Baltatzis GE, Patsouris ES, Hamodrakas SJ. An N-terminal pro-atrial natriuretic peptide (NT-proANP) 'aggregation-prone' segment involved in isolated atrial amyloidosis. FEBS Lett 2013; 588:52-7. [PMID: 24220659 DOI: 10.1016/j.febslet.2013.10.049] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 10/08/2013] [Accepted: 10/30/2013] [Indexed: 01/18/2023]
Abstract
Isolated atrial amyloidosis (IAA) is a common localized form of amyloid deposition within the atria of the aging heart. The main constituents of amyloid fibrils are atrial natriuretic peptide (ANP) and the N-terminal part of its precursor form (NT-proANP). An 'aggregation-prone' heptapeptide ((114)KLRALLT(120)) was located within the NT-proANP sequence. This peptide self-assembles into amyloid-like fibrils in vitro, as electron microscopy, X-ray fiber diffraction, ATR FT-IR spectroscopy and Congo red staining studies reveal. Consequently, remedies/drugs designed to inhibit the aggregation tendency of this 'aggregation-prone' segment of NT-proANP may assist in prevention/treatment of IAA, congestive heart failure (CHF) or atrial fibrillation (AF).
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Affiliation(s)
- Nikolaos N Louros
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Paraskevi L Tsiolaki
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece
| | - Evangelia D Chrysina
- Institute of Biology, Medicinal Chemistry and Biotechnology, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, Athens 116 35, Greece
| | - Georgios E Baltatzis
- 1st Department of Pathology, Medical School, University of Athens, 75 Mikras Assias, Goudi 115 27, Greece
| | - Efstratios S Patsouris
- 1st Department of Pathology, Medical School, University of Athens, 75 Mikras Assias, Goudi 115 27, Greece
| | - Stavros J Hamodrakas
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece.
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176
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Castelletto V, Gouveia RJ, Connon CJ, Hamley IW. Self-assembly and bioactivity of a polymer/peptide conjugate containing the RGD cell adhesion motif and PEG. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.02.016] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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177
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Cao M, Cao C, Zhang L, Xia D, Xu H. Tuning of peptide assembly through force balance adjustment. J Colloid Interface Sci 2013; 407:287-95. [DOI: 10.1016/j.jcis.2013.06.051] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 06/18/2013] [Accepted: 06/20/2013] [Indexed: 11/15/2022]
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178
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Middleton DA, Madine J, Castelletto V, Hamley IW. Insights into the molecular architecture of a peptide nanotube using FTIR and solid-state NMR spectroscopic measurements on an aligned sample. Angew Chem Int Ed Engl 2013; 52:10537-40. [PMID: 23955926 PMCID: PMC4672711 DOI: 10.1002/anie.201301960] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Indexed: 11/05/2022]
Abstract
Queuing up: Molecular orientation within macroscopically aligned nanotubes of the peptide AAAAAAK can be studied by solid-state NMR and IR spectroscopy. Line shape analysis of the NMR spectra indicates that the peptide N-H bonds are tilted 65-70° relative to the nanotube long axis. Re-evaluation of earlier X-ray fiber diffraction data suggests that the peptide molecules are hydrogen-bonded in a helical arrangement along the nanotube axis.
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Affiliation(s)
- David A Middleton
- Institute of Integrative Biology, University of Liverpool, Crown Street, Liverpool L69 7ZB (UK).
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179
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Louros NN, Iconomidou VA, Giannelou P, Hamodrakas SJ. Structural analysis of peptide-analogues of human Zona Pellucida ZP1 protein with amyloidogenic properties: insights into mammalian Zona Pellucida formation. PLoS One 2013; 8:e73258. [PMID: 24069181 PMCID: PMC3772061 DOI: 10.1371/journal.pone.0073258] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Accepted: 07/10/2013] [Indexed: 12/16/2022] Open
Abstract
Zona pellucida (ZP) is an extracellular matrix surrounding and protecting mammalian and fish oocytes, which is responsible for sperm binding. Mammalian ZP consists of three to four glycoproteins, called ZP1, ZP2, ZP3, ZP4. These proteins polymerize into long interconnected filaments, through a common structural unit, known as the ZP domain, which consists of two domains, ZP-N and ZP-C. ZP is related in function to silkmoth chorion and in an evolutionary fashion to the teleostean fish chorion, also fibrous structures protecting the oocyte and embryo, that both have been proven to be functional amyloids. Two peptides were predicted as 'aggregation-prone' by our prediction tool, AMYLPRED, from the sequence of the human ZP1-N domain. Here, we present results from transmission electron microscopy, X-ray diffraction, Congo red staining and attenuated total reflectance Fourier-transform infrared spectroscopy (ATR FT-IR), of two synthetic peptide-analogues of these predicted 'aggregation-prone' parts of the human ZP1-N domain, that we consider crucial for ZP protein polymerization, showing that they both self-assemble into amyloid-like fibrils. Based on our experimental data, we propose that human ZP (hZP) might be considered as a novel, putative, natural protective amyloid, in close analogy to silkmoth and teleostean fish chorions. Experiments are in progress to verify this proposal. We also attempt to provide insights into ZP formation, proposing a possible model for hZP1-N domain polymerization.
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Affiliation(s)
- Nikolaos N. Louros
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
| | - Vassiliki A. Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
| | - Polina Giannelou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
| | - Stavros J. Hamodrakas
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece
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180
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Middleton DA, Madine J, Castelletto V, Hamley IW. Insights into the Molecular Architecture of a Peptide Nanotube Using FTIR and Solid-State NMR Spectroscopic Measurements on an Aligned Sample. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301960] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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181
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Wei H, Mo J, Tao L, Russell RJ, Tymiak AA, Chen G, Iacob RE, Engen JR. Hydrogen/deuterium exchange mass spectrometry for probing higher order structure of protein therapeutics: methodology and applications. Drug Discov Today 2013; 19:95-102. [PMID: 23928097 DOI: 10.1016/j.drudis.2013.07.019] [Citation(s) in RCA: 150] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/19/2013] [Accepted: 07/29/2013] [Indexed: 10/26/2022]
Abstract
The higher order structure of protein therapeutics can be interrogated with hydrogen/deuterium exchange mass spectrometry (HDX-MS). HDX-MS is now a widely used tool in the structural characterization of protein therapeutics. In this review, HDX-MS based workflows designed for protein therapeutic discovery and development processes are presented, focusing on the specific applications of epitope mapping for protein/drug interactions and biopharmaceutical comparability studies. Future trends in the application of HDX-MS in protein therapeutics characterization are also described.
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Affiliation(s)
- Hui Wei
- Bioanalytical and Discovery Analytical Sciences, Research and Development, Bristol-Myers Squibb, Princeton, NJ, USA
| | - Jingjie Mo
- Bioanalytical and Discovery Analytical Sciences, Research and Development, Bristol-Myers Squibb, Princeton, NJ, USA
| | - Li Tao
- Biologics Manufacturing and Process Development, Global Manufacturing and Supply, Bristol-Myers Squibb, Hopewell, NJ, USA
| | - Reb J Russell
- Biologics Manufacturing and Process Development, Global Manufacturing and Supply, Bristol-Myers Squibb, Bloomsbury, NJ, USA
| | - Adrienne A Tymiak
- Bioanalytical and Discovery Analytical Sciences, Research and Development, Bristol-Myers Squibb, Princeton, NJ, USA
| | - Guodong Chen
- Bioanalytical and Discovery Analytical Sciences, Research and Development, Bristol-Myers Squibb, Princeton, NJ, USA.
| | - Roxana E Iacob
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, USA
| | - John R Engen
- Department of Chemistry & Chemical Biology, Northeastern University, Boston, MA, USA.
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182
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Ogata K, Sasano D, Yokoi T, Isozaki K, Yoshida R, Takenaka T, Seike H, Ogawa T, Kurata H, Yasuda N, Takaya H, Nakamura M. Synthesis and Self-Assembly of NCN-Pincer Pd-Complex-Bound Norvalines. Chemistry 2013; 19:12356-75. [DOI: 10.1002/chem.201301513] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2013] [Indexed: 11/06/2022]
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183
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Chen C, Wu D, Fu W, Li Z. Peptide Hydrogels Assembled from Nonionic Alkyl-polypeptide Amphiphiles Prepared by Ring-Opening Polymerization. Biomacromolecules 2013; 14:2494-8. [DOI: 10.1021/bm4008259] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Chongyi Chen
- Beijing National Laboratory for Molecular
Sciences
(BNLMS), Laboratory of Polymer Physics and Chemistry, Institute of
Chemistry, Chinese Academy of Sciences,
Beijing 100190, China
| | - Decheng Wu
- Beijing National Laboratory for Molecular
Sciences
(BNLMS), Laboratory of Polymer Physics and Chemistry, Institute of
Chemistry, Chinese Academy of Sciences,
Beijing 100190, China
| | - Wenxin Fu
- Beijing National Laboratory for Molecular
Sciences
(BNLMS), Laboratory of Polymer Physics and Chemistry, Institute of
Chemistry, Chinese Academy of Sciences,
Beijing 100190, China
| | - Zhibo Li
- Beijing National Laboratory for Molecular
Sciences
(BNLMS), Laboratory of Polymer Physics and Chemistry, Institute of
Chemistry, Chinese Academy of Sciences,
Beijing 100190, China
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184
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Abstract
Elastin is an extracellular matrix protein responsible for the elastic properties of organs and tissues, the elastic properties being conferred to the protein by the presence of elastic fibers. In the perspective of producing tailor-made biomaterials of potential interest in nanotechnology and biotechnology fields, we report a study on an elastin-derived polypeptide. The choice of the polypeptide sequence encoded by exon 6 of Human Tropoelastin Gene is dictated by the peculiar sequence of the polypeptide. As a matter of fact, analogously to elastin, it is constituted of a hydrophobic region (GLGAFPAVTFPGALVPGG) and of a more hydrophilic region rich of lysine and alanine residues (VADAAAAYKAAKA). The role played by the two different regions in triggering the adoption of beta-turn and beta-sheet conformations is herein discussed and demonstrated to be crucial for the self-aggregation properties of the polypeptide.
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185
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Dehsorkhi A, Hamley IW, Seitsonen J, Ruokolainen J. Tuning self-assembled nanostructures through enzymatic degradation of a peptide amphiphile. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6665-72. [PMID: 23651310 PMCID: PMC3678293 DOI: 10.1021/la401025r] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Revised: 05/07/2013] [Indexed: 05/23/2023]
Abstract
The enzymatic cleavage of a peptide amphiphile (PA) is investigated. The self-assembly of the cleaved products is distinct from that of the PA substrate. The PA C16-KKFFVLK is cleaved by α-chymotrypsin at two sites leading to products C16-KKF with FVLK and C16-KKFF with VLK. The PA C16-KKFFVLK forms nanotubes and helical ribbons at room temperature. Both PAs C16-KKF and C16-KKFF corresponding to cleavage products instead self-assemble into 5-6 nm diameter spherical micelles, while peptides FVLK and VLK do not adopt well-defined aggregate structures. The secondary structures of the PAs and peptides are examined by FTIR and circular dichroism spectroscopy and X-ray diffraction. Only C16-KKFFVLK shows substantial β-sheet secondary structure, consistent with its self-assembly into extended aggregates, based on PA layers containing hydrogen-bonded peptide headgroups. This PA also exhibits a thermoreversible transition to twisted tapes on heating.
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Affiliation(s)
- Ashkan Dehsorkhi
- Department of Chemistry, University of Reading, Whiteknights, Reading, United Kingdom
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186
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Shen J, Chen C, Fu W, Shi L, Li Z. Conformation-specific self-assembly of thermo-responsive poly(ethylene glycol)-b-polypeptide diblock copolymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:6271-6278. [PMID: 23634643 DOI: 10.1021/la401095s] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Poly(ethylene glycol)-block-poly(γ-(2-methoxyethoxy)esteryl-L-glutamate) (PEG-b-poly-L-EG2Glu) was synthesized via ring-opening polymerization (ROP) of L-EG2Glu N-carboxyanhydride (NCA) using PEG-NH2 as macroinitiator. This diblock contained a thermo-responsive poly-L-EG2Glu block, which adopted primarily helical conformation in pristine aqueous solution. We found that PEG-b-poly-L-EG2Glu diblock can display two levels of self-assembly behaviors associated with hydrophobic interactions and conformation-specific reassembly, respectively. Upon temperature increase, the PEG-b-poly-L-EG2Glu diblock formed wormlike micelles, in which the poly-L-EG2Glu formed the micelle core and maintained helical conformation. However, extension of thermal annealing time drove the secondary structure transformation of the poly-L-EG2Glu block from helical conformation to β-sheet, which accounted for an assembly structure transition from wormlike micelles to nanoribbons. The critical factor was that poly-L-EG2Glu block can undergo thermo-induced hydrophobicity and conformation transformation, which offered an additional parameter to tune the nature of molecular interactions, i.e., intermolecular versus intramolecular hydrogen bonding interactions. The corresponding conformation and assembly structure changes were characterized using FTIR and electron microscopy, respectively.
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Affiliation(s)
- Junyang Shen
- Key Laboratory of Functional Polymer Materials, Ministry of Education, and Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
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187
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Federici M, Lubiniecki A, Manikwar P, Volkin DB. Analytical lessons learned from selected therapeutic protein drug comparability studies. Biologicals 2013; 41:131-47. [DOI: 10.1016/j.biologicals.2012.10.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 10/01/2012] [Accepted: 10/04/2012] [Indexed: 02/08/2023] Open
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188
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Fu X, Shen Y, Fu W, Li Z. Thermoresponsive Oligo(ethylene glycol) Functionalized Poly-l-cysteine. Macromolecules 2013. [DOI: 10.1021/ma400678w] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Xiaohui Fu
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yong Shen
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Wenxin Fu
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Zhibo Li
- Beijing National Laboratory for Molecular
Sciences (BNLMS), Laboratory of Polymer Physics and Chemistry, Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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189
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Probing protein-protein interaction in biomembranes using Fourier transform infrared spectroscopy. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:2265-71. [PMID: 23624429 DOI: 10.1016/j.bbamem.2013.04.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 04/05/2013] [Indexed: 11/27/2022]
Abstract
The position, intensity and width of bands in infrared spectra that arise from vibrational modes within a protein can be used to probe protein secondary structure, amino acid side chain structure as well as protein dynamics and stability. FTIR spectroscopic studies on protein-protein interaction have been severely limited due to extensive overlap of peaks, from the interacting proteins. This problem is being addressed by combining data processing and acquisition techniques (difference spectroscopy and two-dimensional spectroscopy) with judicious modifications in the protein primary structure through molecular biological and chemical methods. These include the ability to modify amino acids (site-directed mutagenesis; chemical synthesis) and produce isotopically labelled proteins and peptides. Whilst great progress is being made towards overcoming the congestion of overlapping peaks, the slow progress in the assignment of bands continues to be a major hindrance in the use of infrared spectroscopy for obtaining highly accurate and precise information on protein structure. This review discusses some of these problems and presents examples of infrared studies on protein-protein interaction in biomembrane systems. This article is part of a Special Issue entitled: FTIR in membrane proteins and peptide studies.
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190
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Hamley IW, Dehsorkhi A, Castelletto V. Coassembly in binary mixtures of peptide amphiphiles containing oppositely charged residues. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:5050-9. [PMID: 23534557 DOI: 10.1021/la400163q] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The self-assembly in water of designed peptide amphiphile (PA) C16-ETTES containing two anionic residues and its mixtures with C16-KTTKS containing two cationic residues has been investigated. Multiple spectroscopy, microscopy, and scattering techniques are used to examine ordering extending from the β-sheet structures up to the fibrillar aggregate structure. The peptide amphiphiles both comprise a hexadecyl alkyl chain and a charged pentapeptide headgroup containing two charged residues. For C16-ETTES, the critical aggregation concentration was determined by fluorescence experiments. FTIR and CD spectroscopy were used to examine β-sheet formation. TEM revealed highly extended tape nanostructures with some striped regions corresponding to bilayer structures viewed edge-on. Small-angle X-ray scattering showed a main 5.3 nm bilayer spacing along with a 3 nm spacing. These spacings are assigned respectively to predominant hydrated bilayers and a fraction of dehydrated bilayers. Signs of cooperative self-assembly are observed in the mixtures, including reduced bundling of peptide amphiphile aggregates (extended tape structures) and enhanced β-sheet formation.
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Affiliation(s)
- I W Hamley
- School of Chemistry, Pharmacy and Food Biosciences, University of Reading, Reading, UK
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191
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Zhao C, Bai B, Wang H, Qu S, Xiao G, Tian T, Li M. Self-assemblies, helical ribbons and gelation tuned by solvent–gelator interaction in a bi-1,3,4-oxadiazole gelator. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.12.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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192
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Iconomidou VA, Leontis A, Hoenger A, Hamodrakas SJ. Identification of a novel 'aggregation-prone'/'amyloidogenic determinant' peptide in the sequence of the highly amyloidogenic human calcitonin. FEBS Lett 2013; 587:569-74. [PMID: 23395606 DOI: 10.1016/j.febslet.2013.01.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 01/07/2013] [Accepted: 01/14/2013] [Indexed: 11/17/2022]
Abstract
Calcitonin is a 32-residue polypeptide hormone, which takes part in calcium metabolism in bones. It may form amyloid fibrils. Amyloid fibrils are related with serious diseases known as amyloidoses. The amyloid form of calcitonin takes part in medullary thyroid carcinoma. A novel hexapeptide ((6)TCMLGT(11)) of human calcitonin was predicted as a possible 'aggregation-prone' peptide, which may play a role in amyloid formation. We investigated experimentally the ability of an analog of this hexapeptide (cysteine replaced by alanine, TAMLGT) to form amyloid fibrils utilizing TEM, X-ray fiber diffraction, ATR FT-IR spectroscopy, and polarized light microscopy. This peptide self-assembles into amyloid-like fibrils and fibrillogenesis is mediated via nuclei of liquid crystalline nature, known as spherulites.
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Affiliation(s)
- Vassiliki A Iconomidou
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens 157 01, Greece.
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193
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Cheng Y, He C, Xiao C, Ding J, Cui H, Zhuang X, Chen X. Versatile Biofunctionalization of Polypeptide-Based Thermosensitive Hydrogels via Click Chemistry. Biomacromolecules 2013; 14:468-75. [DOI: 10.1021/bm3017059] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yilong Cheng
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
- Graduate University of Chinese Academy of Sciences, Beijing 100039, P. R.
China
| | - Chaoliang He
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
| | - Chunsheng Xiao
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
| | - Jianxun Ding
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
- Graduate University of Chinese Academy of Sciences, Beijing 100039, P. R.
China
| | - Haitao Cui
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
- Graduate University of Chinese Academy of Sciences, Beijing 100039, P. R.
China
| | - Xiuli Zhuang
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
| | - Xuesi Chen
- Key Laboratory of
Polymer Ecomaterials, Changchun Institute of Applied
Chemistry, Chinese Academy of Sciences,
Changchun 130022, P. R. China
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194
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Maity S, Kumar R, Maity SK, Jana P, Bera S, Haldar D. Synthesis and study of 2-acetyl amino-3-[4-(2-amino-5-sulfo-phenylazo)-phenyl]-propionic acid: a new class of inhibitor for hen egg white lysozyme amyloidogenesis. MEDCHEMCOMM 2013. [DOI: 10.1039/c2md20236k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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195
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Grygorenko OO, Zhersh S, Oliinyk BV, Shishkin OV, Tolmachev AA. Conformational behaviour of peptides containing a 2-pyrrolidinemethanesulfonic acid (2PyMS) residue. Org Biomol Chem 2013; 11:975-83. [DOI: 10.1039/c2ob27058g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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196
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Interruption of hydration state of thermoresponsive polymer, poly(N-isopropylacrylamide) in guanidinium hydrochloride. POLYMER 2013. [DOI: 10.1016/j.polymer.2012.12.032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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197
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Chapman R, Koh ML, Warr GG, Jolliffe KA, Perrier S. Structure elucidation and control of cyclic peptide-derived nanotube assemblies in solution. Chem Sci 2013. [DOI: 10.1039/c3sc00064h] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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198
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Lin Z, Li L, Yang Y, Zhan H, Hu Y, Zhou Z, Zhu J, Wang Q, Deng J. The self-assembly of cystine-bridged γ-peptide-based cyclic peptide–dendron hybrids. Org Biomol Chem 2013; 11:8443-51. [DOI: 10.1039/c3ob40532j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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199
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Castelletto V, Gouveia RM, Connon CJ, Hamley IW. New RGD-peptide amphiphile mixtures containing a negatively charged diluent. Faraday Discuss 2013; 166:381-97. [DOI: 10.1039/c3fd00064h] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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200
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KANATA S, NISHINO T, MAKIURA R, SAIKI S, HAYASHI N. Single-Molecule Imaging of Gold-Binding Peptide Adsorbed on Au(111). ANAL SCI 2013; 29:405-9. [DOI: 10.2116/analsci.29.405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Satoshi KANATA
- Department of Physics and Electronics, Graduate School of Engineering, Osaka Prefecture University
| | - Tomoaki NISHINO
- Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University
| | - Rie MAKIURA
- Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University
| | - Sho SAIKI
- Department of Physical Science, Graduate School of Science, Osaka Prefecture University
| | - Nobuhiko HAYASHI
- Nanoscience and Nanotechnology Research Center, Research Organization for the 21st Century, Osaka Prefecture University
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