1
|
Perez Bakovic GR, Roberts JL, Colford B, Joyce M, Servoss SL. Peptoid microsphere coatings: The effects of helicity, temperature, pH, and ionic strength. Biopolymers 2019; 110:e23283. [DOI: 10.1002/bip.23283] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 03/08/2019] [Accepted: 04/04/2019] [Indexed: 12/17/2022]
Affiliation(s)
- German R. Perez Bakovic
- Ralph E. Martin Department of Chemical EngineeringUniversity of Arkansas Fayetteville Fayetteville Arkansas
| | - Jesse L. Roberts
- Ralph E. Martin Department of Chemical EngineeringUniversity of Arkansas Fayetteville Fayetteville Arkansas
| | - Bryce Colford
- Ralph E. Martin Department of Chemical EngineeringUniversity of Arkansas Fayetteville Fayetteville Arkansas
| | - Myles Joyce
- Ralph E. Martin Department of Chemical EngineeringUniversity of Arkansas Fayetteville Fayetteville Arkansas
| | - Shannon L. Servoss
- Ralph E. Martin Department of Chemical EngineeringUniversity of Arkansas Fayetteville Fayetteville Arkansas
| |
Collapse
|
2
|
Lee YJ, Chung S, Ahn YD, Kang B, Lee JY, Seo J. Self-assembling Helical Rod-Coil Peptoid Amphiphiles. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.11042] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yen Jea Lee
- Department of Chemistry, School of Physics and Chemistry; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| | - Solchan Chung
- School of Materials Science and Engineering; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| | - Young Deok Ahn
- Department of Chemistry, School of Physics and Chemistry; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| | - Boyeong Kang
- Department of Chemistry, School of Physics and Chemistry; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| | - Jae Young Lee
- School of Materials Science and Engineering; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| | - Jiwon Seo
- Department of Chemistry, School of Physics and Chemistry; Gwangju Institute of Science and Technology; Gwangju 61005 Republic of Korea
| |
Collapse
|
3
|
Bentz KC, Walley SE, Savin DA. Solvent effects on modulus of poly(propylene oxide)-based organogels as measured by cavitation rheology. SOFT MATTER 2016; 12:4991-5001. [PMID: 27181162 DOI: 10.1039/c6sm00431h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A series of novel organogels were synthesized from poly(propylene oxide) (PPO) functionalized with main chain urea moieties which provided rapid gelation and high moduli in a variety of solvents. Three different molecular weight PPOs were used in this study: 430, 2000, and 4000 g mol(-1), each with α,ω-amino-end groups. Four urea groups were introduced into the main chain by reaction with hexamethylene diisocyanate followed by subsequent reaction with a monofunctional alkyl or aromatic amine. This PPO/urea gelator was found to form gels in carbon tetrachloride, chloroform, dichloromethane, toluene, ethyl acetate, and tetrahydrofuran. Among these, carbon tetrachloride and toluene were found to be the best solvents for this system, resulting in perfectly clear gels with high moduli at low mass fraction for PPO-2000 systems. Flory-Huggins polymer-solvent interaction parameter, χ, was found to be a useful indicator of gel quality for these systems, with χCCl4/PPO-2000 < 0.5 and χtoluene/PPO-2000≈ 0.5. Systems with χ parameters >0.5 were found to form low moduli gels, indicating that for these systems, polymer-solvent interaction parameters can be a useful predictor of gel quality in different solvent systems.
Collapse
Affiliation(s)
- Kyle C Bentz
- George & Josephine Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, FL 32611, USA.
| | | | | |
Collapse
|
4
|
Knight AS, Zhou EY, Francis MB, Zuckermann RN. Sequence Programmable Peptoid Polymers for Diverse Materials Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5665-5691. [PMID: 25855478 DOI: 10.1002/adma.201500275] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 02/13/2015] [Indexed: 06/04/2023]
Abstract
Polymer sequence programmability is required for the diverse structures and complex properties that are achieved by native biological polymers, but efforts towards controlling the sequence of synthetic polymers are, by comparison, still in their infancy. Traditional polymers provide robust and chemically diverse materials, but synthetic control over their monomer sequences is limited. The modular and step-wise synthesis of peptoid polymers, on the other hand, allows for precise control over the monomer sequences, affording opportunities for these chains to fold into well-defined nanostructures. Hundreds of different side chains have been incorporated into peptoid polymers using efficient reaction chemistry, allowing for a seemingly infinite variety of possible synthetically accessible polymer sequences. Combinatorial discovery techniques have allowed the identification of functional polymers within large libraries of peptoids, and newly developed theoretical modeling tools specifically adapted for peptoids enable the future design of polymers with desired functions. Work towards controlling the three-dimensional structure of peptoids, from the conformation of the amide bond to the formation of protein-like tertiary structure, has and will continue to enable the construction of tunable and innovative nanomaterials that bridge the gap between natural and synthetic polymers.
Collapse
Affiliation(s)
- Abigail S Knight
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
| | - Effie Y Zhou
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
| | - Matthew B Francis
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
- The Molecular Foundry Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Ronald N Zuckermann
- The Molecular Foundry Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| |
Collapse
|
5
|
Zhang L, Yang Y, Song Y, Yang H, Zhou G, Xin Y, You Z, Xuan Y. Nanoparticle Delivery Systems Reduce the Reproductive Toxicity of Docetaxel in Rodents. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793984414410128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Various docetaxel (DTX)-loaded nanoparticle delivery systems have been designed to enhance the solubility and pharmacological effects of DTX. However, the toxicity changes of these nano-modified DTX (nano-DTX) are not yet clear enough. Herein, to compare the reproductive toxicity between conventional DTX and nano-DTX, we performed sperm toxicity test in mice, and fertility and early embryo-fetal developmental toxicity test in rats. It was found that DTX severely repressed spermatogenesis and sperm motility, and dramatically increased sperm abnormality in mice and rats. Moreover, DTX significantly decreased copulation, conception and fertility indexes in rats, and no positive pregnant female rat was obtained after treatment with DTX. However, nano-DTX significantly reduced DTX-induced toxicity to sperm. Most importantly, nano-DTX obviously converted DTX-induced fertility and early embryo-fetal developmental toxicity. Furthermore, organ weights and histopathology examination revealed DTX, but not nano-DTX, significantly decreased testis and epididymis weights, and induced obvious histopathological atrophy of testes and epididymides in rats. Further studies indicated that changed activity of lactate dehydrogenase C4 (LDH-C4) in rodents testes was mainly responsible for the above observations. These results strongly support the idea that DTX-loaded nanoformulations have the potential to overcome the reproductive toxicity of DTX.
Collapse
Affiliation(s)
- Lijiang Zhang
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Yongguang Yang
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Yisheng Song
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Hongzhong Yang
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Guoliang Zhou
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Yanfei Xin
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Zhenqiang You
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| | - Yaoxian Xuan
- National Key Laboratory for Safety Evaluation of New Drugs, Center of Safety Evaluation, Zhejiang Academy of Medical Sciences, Hangzhou 310053, Zhejiang, P. R. China
| |
Collapse
|
6
|
Wang Y, Cui H, Yang Y, Zhao X, Sun C, Chen W, Du W, Cui J. Mechanism Study of Gene Delivery and Expression in PK-15 Cells Using Magnetic Iron Oxide Nanoparticles as Gene Carriers. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793984414410189] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The mechanism of gene delivery and expression is one of the most important concerns raised by the development of gene delivery methods. Limited investigation is performed on how magnetic nanoparticles combine with DNA and deliver gene into mammalian cells. In this context, polyethyleneimine (PEI) coated iron oxide magnetic nanoparticles (MNPs) were used as gene carriers for binding and condensing with plasmid DNA expressing enhanced green fluorescent protein (EGFP). The morphology and structure of MNP–DNA complexes were characterized by transmission electron microscopy (TEM) and atomic force microscopy (AFM). We evidenced that large amounts of DNA wrapped around the surface of MNPs and that the MNPs were physically entrapped by the DNA arranged both horizontally and vertically. EGFP gene was successfully expressed under mediation of an external magnetic field which is necessary to efficiently target EGFP gene to the cells. Fluorescence from EGFP was separately detected in the cell cytoplasm and cell nucleus.
Collapse
Affiliation(s)
- Yan Wang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Haixin Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Yongguang Yang
- Department of Cancer and Cell Biology, University of Cincinnati, College of Medicine, 3125 Eden Avenue, Cincinnati, OH 45267, USA
| | - Xiang Zhao
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Changjiao Sun
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Wenjie Chen
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Wei Du
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| | - Jinhui Cui
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, No. 12 South Street of Zhongguancun Haidian District, Beijing 100081, P. R. China
| |
Collapse
|
7
|
Gu H, Overstreet AMC, Yang Y. Exosomes Biogenesis and Potentials in Disease Diagnosis and Drug Delivery. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793984414410177] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Exosomes were discovered more than 30 years ago. Only recently has their importance been recognized for intercellular communication. Exosomes, with their size ranging from 30 nm to 100 nm, are lipid bilayer nanoparticles and secreted by many different types of cells with versatile functions. Exosomes contain macromolecules and exist in various body fluids, including blood, urine, milk and ascites fluid. Due to their specific property, exosomes are very promising in the fields of disease diagnosis and therapy. Nanotechnology is a great tool that will be helpful in basic research and the application of exosomes. Here, we briefly review the function and potential use of exosomes in nanomedicine.
Collapse
Affiliation(s)
- Haitao Gu
- Department of Pharmacology & Cell Biophysics University of Cincinnati, College of Medicine, Cincinnati, OH 45267, USA
| | - Anne-Marie C. Overstreet
- Department of Cancer and Cell Biology, University of Cincinnati, College of Medicine, Cincinnati, OH 45267, USA
| | - Yongguang Yang
- Department of Cancer and Cell Biology, University of Cincinnati, College of Medicine, Cincinnati, OH 45267, USA
| |
Collapse
|
8
|
Liu Q, Hao W, Yang Y, Richel A, Ouyang C, Liu H, Guo R, Xia X, Yang J, Song J, Goffin D. Effects of Size and Dispersity of Microcrystalline Celluloses on Size, Structure and Stability of Nanocrystalline Celluloses Extracted by Acid Hydrolysis. ACTA ACUST UNITED AC 2014. [DOI: 10.1142/s1793984414410141] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nanocrystalline celluloses (NCCs) were separated from four commercial microcrystalline celluloses (MCCs) by an acid hydrolysis–sonication treatment. Transmission electron microscopy (TEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectrum, X-ray diffraction (XRD) and thermogravimetric analysis (TGA) were conducted to investigate the NCCs. MCCs with different morphologies and particle sizes showed different aggregation degrees. The aggregation of MCCs followed the order MCC1 > MCC3 > MCC2 > MCC4, which is the same order of the heights of the resulting NCCs. The best uniformity and thermal stability were characterized for NCC3, which was produced by MCC3 with smallest original particle size and good dispersity among the four MCCs. This result suggests that both the original particle size and dispersity of MCCs had significant effects on separated NCCs.
Collapse
Affiliation(s)
- Qi Liu
- National Engineering Laboratory for Crop Efficient Water Use and Disaster Mitigation and Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
- Department of Agriculture, Bio-engineering and Chemistry, University of Liege-Gembloux Agro-Bio Tech, 5030, Belgium
| | - Weiping Hao
- National Engineering Laboratory for Crop Efficient Water Use and Disaster Mitigation and Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Yongguang Yang
- Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, Ohio 45267, USA
| | - Aurore Richel
- Unit of Biological and Industrial Chemistry, University of Liege-Gembloux Agro-Bio Tech, 5030, Belgium
| | - Canbin Ouyang
- Department of Pesticide, Key Laboratory of Pesticide Chemistry and Application, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China
| | - Huan Liu
- School of Music and Recording Arts, Communication University of China, Beijing 100024, P. R. China
| | - Rui Guo
- National Engineering Laboratory for Crop Efficient Water Use and Disaster Mitigation, and Key Laboratory of Dryland Agriculture, Ministry of Agriculture Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Xu Xia
- National Engineering Laboratory for Crop Efficient Water Use and Disaster Mitigation, and Key Laboratory of Dryland Agriculture, Ministry of Agriculture Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Jing Yang
- Construction Engineering Test Center, Central Research Institute of Building and Construction CO., Ltd., MCC Group, Beijing 100088, P. R. China
| | - Jiqing Song
- National Engineering Laboratory for Crop Efficient Water Use and Disaster Mitigation, and Key Laboratory of Dryland Agriculture, Ministry of Agriculture, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, P. R. China
| | - Dorothée Goffin
- Department of Agriculture, Bio-engineering and Chemistry, University of Liege-Gembloux Agro-Bio Tech, 5030, Belgium
| |
Collapse
|
9
|
Abstract
New techniques and materials are called for wastewater treatment due to the shortage of worldwide fresh water and the increasing water demand. As a simple and efficient method, adsorption technique has been extensively applied to remove organic and inorganic pollutants from contaminated water. The application of carbon nanomaterials, such as activated carbon, carbon nanotubes (CNTs), graphenes and their derivatives/analogues, in wastewater treatment has also been investigated due to their unique properties, such as wide availability, porous structure, large surface area, tunable morphology and nontoxicity. This review highlights the recent advances of wastewater treatment utilizing carbon nanomaterial modified composites as adsorbents. The adsorption phenomenon and its mechanism are briefly discussed. Detailed discussions are focused on the selective adsorption of carbon nanomaterial composites to unique pollutants. The remaining challenges are also mentioned.
Collapse
Affiliation(s)
- Yongshun Huang
- Department of Chemistry, The University of Cincinnati, Cincinnati, OH 45221, USA
| | - Xiaoping Chen
- Department of Chemistry, The University of Cincinnati, Cincinnati, OH 45221, USA
| |
Collapse
|
10
|
Wang N, Huo Y. Crystal structure of new (Z)-2-((E)-3-(4-nitrophenyl)-1-ferrocenylallylidene)hydrazine carbothioamide. J STRUCT CHEM+ 2014. [DOI: 10.1134/s0022476614050229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
Obrzud M, Rospenk M, Koll A. Self-aggregation mechanisms of N-alkyl derivatives of urea and thiourea. Phys Chem Chem Phys 2014; 16:3209-19. [PMID: 24406348 DOI: 10.1039/c3cp53582g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The mechanisms of self-aggregation of N-alkyl and N,N'-dialkyl derivatives of urea and thiourea in weakly polar solvents (chloroform and 1,2-dichloroethane) were examined. The C-H···O or C-H···S hydrogen bonds formed with these two acidic solvents compete with the N-H···O or N-H···S hydrogen bonds formed between solute molecules, influencing the self-aggregation of urea derivatives in a particular solvent. The peculiarities of the solvent interactions were discussed and the stronger interaction of chloroform was noted. Aggregation of the N-alkyl derivatives was followed using IR spectroscopy, with two gradual aggregation constants (K1 and K2) determined. The average molecular weight and dipole moments were shown to depend on the concentration, and the form of aggregation was analyzed through the study of the dipole moments. All of the urea derivatives demonstrated an increase in dipole moment with increased concentration, resulting in stronger NH2···O hydrogen bond interactions and leading to linear-type aggregation. Contrastingly, the dipole moments of the mono-N-alkyl-substituted thioureas decreased with concentration. Density-functional theory calculation of these processes showed that reliable results could only be obtained if solvent interactions were considered, with a specific combination of local and bulk effects. It was also shown that going from N,N'-disubstituted to N-monoalkyl derivatives the ability to aggregate increases, which is related to a diminished steric hindrance to hydrogen bonding. Finally, it was demonstrated that the mechanisms of self-aggregation depend on the acid-base properties of the solute, hydrogen bonding to the solvent molecules, and steric interactions of the aliphatic chains.
Collapse
Affiliation(s)
- Monika Obrzud
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383 Wrocław, Poland.
| | | | | |
Collapse
|
12
|
Zhu X, Xiang DS, Shi WY. Crystal structures of methyl and benzyl 5-ferrocenyl-3,5-dimethyl-2-pyrazoline-1-dithiocarboxylate. J STRUCT CHEM+ 2014. [DOI: 10.1134/s0022476613060152] [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]
|
13
|
Chen X, Fei P, Cavicchi KA, Yang W, Ayres N. The poor solubility of ureidopyrimidone can be used to form gels of low molecular weight N-alkyl urea oligomers in organic solvents. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-3087-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
14
|
Huang Y, Taylor L, Chen X, Ayres N. Synthesis of a polyurea from a glucose- or mannose-containing N
-alkyl urea peptoid oligomer. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26953] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yongshun Huang
- Department of Chemistry; The University of Cincinnati; P.O. Box 210172, Cincinnati Ohio 45221
| | - Leeanne Taylor
- Department of Chemistry; The University of Cincinnati; P.O. Box 210172, Cincinnati Ohio 45221
| | - Xiaoping Chen
- Department of Chemistry; The University of Cincinnati; P.O. Box 210172, Cincinnati Ohio 45221
| | - Neil Ayres
- Department of Chemistry; The University of Cincinnati; P.O. Box 210172, Cincinnati Ohio 45221
| |
Collapse
|
15
|
Taylor L, Chen X, Ayres N. Synthesis of a glycosaminoglycan polymer mimetic using an N
-alkyl-N
,N
-linked urea oligomer containing glucose pendant groups. POLYM INT 2013. [DOI: 10.1002/pi.4567] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Leeanne Taylor
- University of Cincinnati; Department of Chemistry; 301 Clifton Court, PO Box 210172 Cincinnati OH 45221 USA
| | - Xiaoping Chen
- University of Cincinnati; Department of Chemistry; 301 Clifton Court, PO Box 210172 Cincinnati OH 45221 USA
| | - Neil Ayres
- University of Cincinnati; Department of Chemistry; 301 Clifton Court, PO Box 210172 Cincinnati OH 45221 USA
| |
Collapse
|
16
|
|
17
|
Mangunuru HPR, Yang H, Wang G. Synthesis of peptoid based small molecular gelators by a multiple component reaction. Chem Commun (Camb) 2013; 49:4489-91. [DOI: 10.1039/c3cc41043a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
18
|
De novo structure prediction and experimental characterization of folded peptoid oligomers. Proc Natl Acad Sci U S A 2012; 109:14320-5. [PMID: 22908242 DOI: 10.1073/pnas.1209945109] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Peptoid molecules are biomimetic oligomers that can fold into unique three-dimensional structures. As part of an effort to advance computational design of folded oligomers, we present blind-structure predictions for three peptoid sequences using a combination of Replica Exchange Molecular Dynamics (REMD) simulation and Quantum Mechanical refinement. We correctly predicted the structure of a N-aryl peptoid trimer to within 0.2 Å rmsd-backbone and a cyclic peptoid nonamer to an accuracy of 1.0 Å rmsd-backbone. X-ray crystallographic structures are presented for a linear N-alkyl peptoid trimer and for the cyclic peptoid nonamer. The peptoid macrocycle structure features a combination of cis and trans backbone amides, significant nonplanarity of the amide bonds, and a unique "basket" arrangement of (S)-N(1-phenylethyl) side chains encompassing a bound ethanol molecule. REMD simulations of the peptoid trimers reveal that well folded peptoids can exhibit funnel-like conformational free energy landscapes similar to those for ordered polypeptides. These results indicate that physical modeling can successfully perform de novo structure prediction for small peptoid molecules.
Collapse
|
19
|
Zhang D, Lahasky SH, Guo L, Lee CU, Lavan M. Polypeptoid Materials: Current Status and Future Perspectives. Macromolecules 2012. [DOI: 10.1021/ma202319g] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Donghui Zhang
- Department of Chemistry and Macromolecular
Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Samuel H. Lahasky
- Department of Chemistry and Macromolecular
Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Li Guo
- Department of Chemistry and Macromolecular
Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Chang-Uk Lee
- Department of Chemistry and Macromolecular
Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Monika Lavan
- Department of Chemistry and Macromolecular
Studies Group, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| |
Collapse
|