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Sznaider F, Rojas AM, Stortz CA, Navarro DA. Amidation of arabinoglucuronoxylans to modulate their flow behavior. Carbohydr Polym 2024; 336:122123. [PMID: 38670754 DOI: 10.1016/j.carbpol.2024.122123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 03/22/2024] [Accepted: 04/01/2024] [Indexed: 04/28/2024]
Abstract
Arabinoglucuronoxylans obtained from the exudate of Cercidium praecox (Brea gum) were subjected to an amidation reaction to modulate their flow behavior to obtain a product with similar behavior to gum Arabic. The amidation reaction of the uronic acids present in this exudate was studied using the 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinimide (NHS) system with the aim of maximizing product yield and minimizing by-product. An analysis of the significant factors involved in the reaction was carried out and a response surface methodology was conducted to optimize the stoichiometry of the reagents used. It was possible to obtain models for predicting the degree of amidation (DA) of arabinoglucuronoxylans and the formation of by-products. The formation of a secondary product derived from the amino acid β-alanine which has not been reported previously in the reaction with polysaccharides, was described. The flow behavior of an amidated product (DA = 52 %) was determined, showing a pseudoplastic behavior and a decreased Newtonian viscosity (η0 = 36.2 Pa s) at the lowest shear rate range with respect to native product solution (η0 = 115 Pa s). Amidated arabinoglucuronoxylans had a flow behavior more similar to that of gum Arabic.
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Affiliation(s)
- Frank Sznaider
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR/CONICET), Departamento de Química Orgánica, Ciudad Universitaria, C1428BGA Buenos Aires, Argentina
| | - Ana M Rojas
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Instituto de Tecnología de Alimentos y Procesos Químicos (ITAPROQ/CONICET-UBA), Departamento de Industrias, Ciudad Universitaria, C1428BGA Buenos Aires, Argentina
| | - Carlos A Stortz
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR/CONICET), Departamento de Química Orgánica, Ciudad Universitaria, C1428BGA Buenos Aires, Argentina
| | - Diego A Navarro
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Consejo Nacional de Investigaciones Científicas y Técnicas, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR/CONICET), Departamento de Química Orgánica, Ciudad Universitaria, C1428BGA Buenos Aires, Argentina.
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2
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Lv C, Yang X, Wang Z, Ying M, Han Q, Li S. Enhanced Performance of Bioelectrodes Made with Amination-Modified Glucose Oxidase Immobilized on Carboxyl-Functionalized Ordered Mesoporous Carbon. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3086. [PMID: 34835850 PMCID: PMC8617758 DOI: 10.3390/nano11113086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/04/2021] [Accepted: 11/11/2021] [Indexed: 11/17/2022]
Abstract
This research reveals the improved performance of bioelectrodes made with amination-modified glucose oxidase (GOx-NH2) and carboxyl-functionalized mesoporous carbon (OMC-COOH). Results showed that when applied with 10 mM EDC amination, the functional groups of NH2 were successfully added to GOx, according to the analysis of 1H-NMR, elemental composition, and FTIR spectra. Moreover, after the aminated modification, increased enzyme immobilization (124.01 ± 1.49 mg GOx-NH2/g OMC-COOH; 2.77-fold increase) and enzyme activity (1.17-fold increase) were achieved, compared with those of non-modified GOx. Electrochemical analysis showed that aminated modification enhanced the peak current intensity of Nafion/GOx-NH2/OMC-COOH (1.32-fold increase), with increases in the charge transfer coefficient α (0.54), the apparent electron transfer rate constant ks (2.54 s-1), and the surface coverage Γ (2.91 × 10-9 mol·cm-2). Results showed that GOx-NH2/OMC-COOH exhibited impressive electro-activity and a favorable anodic reaction.
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Affiliation(s)
- Chuhan Lv
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (C.L.); (M.Y.); (Q.H.)
| | - Xuewei Yang
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (C.L.); (M.Y.); (Q.H.)
| | - Zongkang Wang
- Shenzhen Batian Ecological Engineering Co., Ltd., Shenzhen 518055, China;
| | - Ming Ying
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (C.L.); (M.Y.); (Q.H.)
| | - Qingguo Han
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (C.L.); (M.Y.); (Q.H.)
| | - Shuangfei Li
- Guangdong Technology Research Center for Marine Algal Bioengineering, Guangdong Key Laboratory of Plant Epigenetics, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, China; (C.L.); (M.Y.); (Q.H.)
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3
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Lalut J, Payan H, Davis A, Lecoutey C, Legay R, Sopkova-de Oliveira Santos J, Claeysen S, Dallemagne P, Rochais C. Rational design of novel benzisoxazole derivatives with acetylcholinesterase inhibitory and serotoninergic 5-HT 4 receptors activities for the treatment of Alzheimer's disease. Sci Rep 2020; 10:3014. [PMID: 32080261 PMCID: PMC7033111 DOI: 10.1038/s41598-020-59805-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 01/30/2020] [Indexed: 01/09/2023] Open
Abstract
A rigidification strategy was applied to the preclinical candidate donecopride, an acetylcholinesterase inhibitor possessing 5-HT4R agonist activity. Inspired by promising bioactive benzisoxazole compounds, we have conducted a pharmacomodulation study to generate a novel series of multitarget directed ligands. The chemical synthesis of the ligand was optimized and compounds were evaluated in vitro against each target and in cellulo. Structure-activity relationship was supported by docking analysis in human acetylcholinesterase binding site. Among the synthesized compounds, we have identified a novel hybrid 32a (3-[2-[1-(cyclohexylmethyl)-4-piperidyl]ethyl]-4-methoxy-1,2-benzoxazole) able to display nanomolar acetylcholinesterase inhibitory effects and nanomolar Ki for 5-HT4R.
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Affiliation(s)
- Julien Lalut
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France
| | - Hugo Payan
- IGF, Univ. Montpellier, CNRS, INSERM, Montpellier, France
| | - Audrey Davis
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France
| | - Cédric Lecoutey
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France
| | - Rémi Legay
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France
| | | | | | - Patrick Dallemagne
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France
| | - Christophe Rochais
- Normandie Univ, UNICAEN, Centre d'Etudes et de Recherche sur le Médicament de Normandie (CERMN), Caen, France.
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Kal‐Koshvandi AT, Heravi MM. Applications of Dainshefsky's Dienes in the Asymmetric synthesis of Aza‐Diels‐Alder Reaction. CHEM REC 2018; 19:550-600. [DOI: 10.1002/tcr.201800066] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 08/17/2018] [Indexed: 11/11/2022]
Affiliation(s)
| | - Majid M. Heravi
- Department of ChemistryAlzahra University Vanak, Tehran Iran
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5
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Co-immobilization of lipases and β- d -galactosidase onto magnetic nanoparticle supports: Biochemical characterization. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.04.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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6
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de Morais Júnior WG, Terrasan CRF, Fernández-Lorente G, Guisán JM, Ribeiro EJ, de Resende MM, Pessela BC. Solid-phase amination of Geotrichum candidum lipase: ionic immobilization, stabilization and fish oil hydrolysis for the production of Omega-3 polyunsaturated fatty acids. Eur Food Res Technol 2017. [DOI: 10.1007/s00217-017-2848-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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7
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Hoshino Y, Ohtsuka N, Honda K. Highly Selective Synthesis of Primary Amines via Self-Propagative Lossen Rearrangement. J SYN ORG CHEM JPN 2017. [DOI: 10.5059/yukigoseikyokaishi.75.746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yujiro Hoshino
- Graduate School of Environment and Information Sciences, Yokohama National University
| | | | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences, Yokohama National University
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8
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Manne SR, Thalluri K, Giri RS, Chandra J, Mandal B. Ethyl 2-(tert-Butoxycarbonyloxyimino)-2-cyanoacetate (Boc-Oxyma): An Efficient Reagent for the Racemization Free Synthesis of Ureas, Carbamates and Thiocarbamates via Lossen Rearrangement. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600661] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Srinivasa Rao Manne
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam - 781039 India
| | - Kishore Thalluri
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam - 781039 India
| | - Rajat Subhra Giri
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam - 781039 India
| | - Jyoti Chandra
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam - 781039 India
| | - Bhubaneswar Mandal
- Department of Chemistry; Indian Institute of Technology Guwahati; Guwahati Assam - 781039 India
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9
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Totaro KA, Liao X, Bhattacharya K, Finneman JI, Sperry JB, Massa MA, Thorn J, Ho SV, Pentelute BL. Systematic Investigation of EDC/sNHS-Mediated Bioconjugation Reactions for Carboxylated Peptide Substrates. Bioconjug Chem 2016; 27:994-1004. [PMID: 26974183 DOI: 10.1021/acs.bioconjchem.6b00043] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1-Ethyl-3-(3-(dimethylamino)propyl)carbodiimide (EDC) bioconjugations have been utilized in preparing variants for medical research. While there have been advances in optimizing the reaction for aqueous applications, there has been limited focus toward identifying conditions and side reactions that interfere with product formation. We present a systematic investigation of EDC/N-hydroxysulfosuccinimide (sNHS)-mediated bioconjugations on carboxylated peptides and small proteins. We identified yet-to-be-reported side products arising from both the reagents and substrates. Model peptides used in this study illustrate particular substrates are more susceptible to side reactions than others. From our studies, we found that bioconjugations are more efficient with high concentrations of amine nucleophile but not sNHS. Performing bioconjugations on a model affibody protein show that the trends established with model peptides hold for more complex systems.
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Affiliation(s)
- Kyle A Totaro
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Xiaoli Liao
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Keshab Bhattacharya
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Jari I Finneman
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Justin B Sperry
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Mark A Massa
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Jennifer Thorn
- Pfizer Worldwide Research and Development , 700 Chesterfield Parkway West, Chesterfield, Missouri 63017, United States
| | - Sa V Ho
- Pfizer Worldwide Research and Development , 1 Burtt Road, Andover, Massachusetts 01810, United States
| | - Bradley L Pentelute
- Department of Chemistry, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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10
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Kaur P, Tomechko SE, Kiselar J, Shi W, Deperalta G, Wecksler AT, Gokulrangan G, Ling V, Chance MR. Characterizing monoclonal antibody structure by carboxyl group footprinting. MAbs 2016; 7:540-52. [PMID: 25933350 DOI: 10.1080/19420862.2015.1023683] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Structural characterization of proteins and their antigen complexes is essential to the development of new biologic-based medicines. Amino acid-specific covalent labeling (CL) is well suited to probe such structures, especially for cases that are difficult to examine by alternative means due to size, complexity, or instability. We present here a detailed account of carboxyl group labeling (with glycine ethyl ester (GEE) tagging) applied to a glycosylated monoclonal antibody therapeutic (mAb). The experiments were optimized to preserve the structural integrity of the mAb, and experimental conditions were varied and replicated to establish the reproducibility of the technique. Homology-based models were generated and used to compare the solvent accessibility of the labeled residues, which include aspartic acid (D), glutamic acid (E), and the C-terminus (i.e., the target probes), with the experimental data in order to understand the accuracy of the approach. Data from the mAb were compared to reactivity measures of several model peptides to explain observed variations in reactivity. Attenuation of reactivity in otherwise solvent accessible probes is documented as arising from the effects of positive charge or bond formation between adjacent amine and carboxyl groups, the latter accompanied by observed water loss. A comparison of results with previously published data by Deperalta et al using hydroxyl radical footprinting showed that 55% (32/58) of target residues were GEE labeled in this study whereas the previous study reported 21% of the targets were labeled. Although the number of target residues in GEE labeling is fewer, the two approaches provide complementary information. The results highlight advantages of this approach, such as the ease of use at the bench top, the linearity of the dose response plots at high levels of labeling, reproducibility of replicate experiments (<2% variation in modification extent), the similar reactivity of the three target probes, and significant correlation of reactivity and solvent accessible surface area.
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Key Words
- 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide
- ACN, acetonitrile
- CD, circular dichroism
- CL, covalent labeling
- DR, dose response
- EDC, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide
- EIC, extracted ion chromatogram
- GEE, glycine ethyl ester
- HC, heavy chain
- HDX, hydrogen-deuterium exchange
- HRF, hydroxyl radical footprinting
- IT, ion trap
- IgG, immunoglobulin gamma
- LC, light chain
- Lys-C, lysyl endopeptidase
- MS, mass spectrometry
- RC, rate constant
- SASA, solvent accessible surface area
- SEC, size-exclusion chromatography
- acetonitrile
- circular dichroism
- covalent labeling
- dose response
- extracted ion chromatogram
- glycine ethyl ester
- heavy chain
- hydrogen-deuterium exchange
- hydroxyl radical footprinting
- immunoglobulin gamma
- ion trap
- light chain
- lysyl endopeptidase
- mAb, monoclonal antibody
- mass spectrometry
- monoclonal antibody
- rate constant
- size-exclusion chromatography
- solvent accessible surface area
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Affiliation(s)
- Parminder Kaur
- a Center for Proteomics and Bioinformatics; School of Medicine; Case Western Reserve University ; Cleveland , OH , USA
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Ohtsuka N, Okuno M, Hoshino Y, Honda K. A base-mediated self-propagative Lossen rearrangement of hydroxamic acids for the efficient and facile synthesis of aromatic and aliphatic primary amines. Org Biomol Chem 2016; 14:9046-54. [DOI: 10.1039/c6ob01178k] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
A variety of aromatic and aliphatic hydroxamic acids were converted to the corresponding primary amines via base-mediated rearrangement.
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Affiliation(s)
- Naoya Ohtsuka
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Moriaki Okuno
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Yujiro Hoshino
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
| | - Kiyoshi Honda
- Graduate School of Environment and Information Sciences
- Yokohama National University
- Yokohama 240-8501
- Japan
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12
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Pereira MG, Facchini FDA, Polizeli AM, Vici AC, Jorge JA, Pessela BC, Férnandez-Lorente G, Guisán JM, de Moraes Polizeli MDLT. Stabilization of the lipase of Hypocrea pseudokoningii by multipoint covalent immobilization after chemical modification and application of the biocatalyst in oil hydrolysis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.08.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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14
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Kaur P, Tomechko S, Kiselar J, Shi W, Deperalta G, Wecksler AT, Gokulrangan G, Ling V, Chance MR. Characterizing monoclonal antibody structure by carbodiimide/GEE footprinting. MAbs 2015; 6:1486-99. [PMID: 25484052 DOI: 10.4161/19420862.2014.975096] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Amino acid-specific covalent labeling is well suited to probe protein structure and macromolecular interactions, especially for macromolecules and their complexes that are difficult to examine by alternative means, due to size, complexity, or instability. Here we present a detailed account of carbodiimide-based covalent labeling (with GEE tagging) applied to a glycosylated monoclonal antibody therapeutic, which represents an important class of biologic drugs. Characterization of such proteins and their antigen complexes is essential to development of new biologic-based medicines. In this study, the experiments were optimized to preserve the structural integrity of the protein, and experimental conditions were varied and replicated to establish the reproducibility and precision of the technique. Homology-based models were generated and used to compare the solvent accessibility of the labeled residues, which include D, E, and the C-terminus, against the experimental surface accessibility data in order to understand the accuracy of the approach in providing an unbiased assessment of structure. Data from the protein were also compared to reactivity measures of several model peptides to explain sequence or structure-based variations in reactivity. The results highlight several advantages of this approach. These include: the ease of use at the bench top, the linearity of the dose response plots at high levels of labeling (indicating that the label does not significantly perturb the structure of the protein), the high reproducibility of replicate experiments (<2 % variation in modification extent), the similar reactivity of the 3 target probe residues (as suggested by analysis of model peptides), and the overall positive and significant correlation of reactivity and solvent accessible surface area (the latter values predicted by the homology modeling). Attenuation of reactivity, in otherwise solvent accessible probes, is documented as arising from the effects of positive charge or bond formation between adjacent amine and carboxyl groups, the latter accompanied by observed water loss. The results are also compared with data from hydroxyl radical-mediated oxidative footprinting on the same protein, showing that complementary information is gained from the 2 approaches, although the number of target residues in carbodiimide/GEE labeling is fewer. Overall, this approach is an accurate and precise method for assessing protein structure of biologic drugs.
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Key Words
- ACN, acetonitrile
- CD, circular dichroism
- CL, covalent labeling
- DR, dose response
- EDC, 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide
- EIC, extracts the ion chromatogram
- FPOP, fast photochemical oxidation of proteins
- GEE
- GEE, glycine ethyl ester
- HC, heavy chain
- HDX, hydrogen-deuterium exchange
- HRF, hydroxyl radical footprinting
- IT, ion trap
- IgG, immunoglobulin gamma
- LC, light chain
- LysC, Lysyl endopeptidase
- MS, mass spectrometry
- NMR, nuclear magnetic resonance
- RC, rate constant
- SASA, solvent accessible surface area
- SEC, size-exclusion chromatography
- VEGF, vascular endothelial growth factor
- covalent labeling
- footprinting
- mAb, monoclonal antibody
- protein structure
- structural proteomics
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Affiliation(s)
- Parminder Kaur
- a Center for Proteomics and Bioinformatics ; Case Western Reserve University ; Cleveland , OH USA
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Kaeobamrung J, Lanui A, Mahawong S, Duangmak W, Rukachaisirikul V. One-pot synthesis of trisubstituted ureas from α-chloroaldoxime O-methanesulfonates and secondary amines. RSC Adv 2015. [DOI: 10.1039/c5ra10060g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Trisubstituted ureas can be synthesized in a one-pot fashion from bench-stable α-chloroaldoxime O-methanesulfonates and secondary amines under mild reaction conditions.
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Affiliation(s)
- Juthanat Kaeobamrung
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Prince of Songkla University
- Hat-Yai
- 90112 Thailand
| | - Asan Lanui
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Prince of Songkla University
- Hat-Yai
- 90112 Thailand
| | - Sirinad Mahawong
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Prince of Songkla University
- Hat-Yai
- 90112 Thailand
| | - Witthawin Duangmak
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Prince of Songkla University
- Hat-Yai
- 90112 Thailand
| | - Vatcharin Rukachaisirikul
- Department of Chemistry and Center of Excellence for Innovation in Chemistry
- Faculty of Science
- Prince of Songkla University
- Hat-Yai
- 90112 Thailand
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Graça VC, Silva MS, Reis LV, Sousa F, Almeida P, Queiroz JA, Santos PF. Ethylenediamine-Derived Chromatographic Ligand to Separate BSA, Lysozyme, and RNase A. Chromatographia 2014. [DOI: 10.1007/s10337-014-2749-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Godoy CA, de las Rivas B, Guisán JM. Site-directing an intense multipoint covalent attachment (MCA) of mutants of the Geobacillus thermocatenulatus lipase 2 (BTL2): Genetic and chemical amination plus immobilization on a tailor-made support. Process Biochem 2014. [DOI: 10.1016/j.procbio.2014.04.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Collier TS, Diraviyam K, Monsey J, Shen W, Sept D, Bose R. Carboxyl group footprinting mass spectrometry and molecular dynamics identify key interactions in the HER2-HER3 receptor tyrosine kinase interface. J Biol Chem 2013; 288:25254-25264. [PMID: 23843458 DOI: 10.1074/jbc.m113.474882] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The HER2 receptor tyrosine kinase is a driver oncogene in many human cancers, including breast and gastric cancer. Under physiologic levels of expression, HER2 heterodimerizes with other members of the EGF receptor/HER/ErbB family, and the HER2-HER3 dimer forms one of the most potent oncogenic receptor pairs. Previous structural biology studies have individually crystallized the kinase domains of HER2 and HER3, but the HER2-HER3 kinase domain heterodimer structure has yet to be solved. Using a reconstituted membrane system to form HER2-HER3 kinase domain heterodimers and carboxyl group footprinting mass spectrometry, we observed that HER2 and HER3 kinase domains preferentially form asymmetric heterodimers with HER3 and HER2 monomers occupying the donor and acceptor kinase positions, respectively. Conformational changes in the HER2 activation loop, as measured by changes in carboxyl group labeling, required both dimerization and nucleotide binding but did not require activation loop phosphorylation at Tyr-877. Molecular dynamics simulations on HER2-HER3 kinase dimers identify specific inter- and intramolecular interactions and were in good agreement with MS measurements. Specifically, several intermolecular ionic interactions between HER2 Lys-716-HER3 Glu-909, HER2 Glu-717-HER3 Lys-907, and HER2 Asp-871-HER3 Arg-948 were identified by molecular dynamics. We also evaluated the effect of the cancer-associated mutations HER2 D769H/D769Y, HER3 E909G, and HER3 R948K (also numbered HER3 E928G and R967K) on kinase activity in the context of this new structural model. This study provides valuable insights into the EGF receptor/HER/ErbB kinase structure and interactions, which can guide the design of future therapies.
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Affiliation(s)
| | - Karthikeyan Diraviyam
- the Department of Biomedical Engineering and Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109
| | - John Monsey
- From the Division of Oncology, Department of Medicine, and
| | - Wei Shen
- From the Division of Oncology, Department of Medicine, and
| | - David Sept
- the Department of Biomedical Engineering and Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, Michigan 48109
| | - Ron Bose
- From the Division of Oncology, Department of Medicine, and; the Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri 63110 and.
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20
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Yoganathan S, Miller SJ. N-Methylimidazole-catalyzed synthesis of carbamates from hydroxamic acids via the Lossen rearrangement. Org Lett 2013; 15:602-5. [PMID: 23327543 DOI: 10.1021/ol303424b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient, one-pot, N-methylimidazole (NMI) accelerated synthesis of aromatic and aliphatic carbamates via the Lossen rearrangement is reported. NMI is a catalyst for the conversion of isocyanate intermediates to the carbamates. Moreover, the utility of arylsulfonyl chloride in combination with NMI minimizes the formation of often-observed hydroxamate-isocyanate dimers during the sequence. Under the present conditions, lowering of temperatures is also possible, enabling a mild protocol.
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Affiliation(s)
- Sabesan Yoganathan
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, USA
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21
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22
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Jašíková L, Hanikýřová E, Škríba A, Jašík J, Roithová J. Metal-assisted Lossen Rearrangement. J Org Chem 2012; 77:2829-36. [DOI: 10.1021/jo300031f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lucie Jašíková
- Department of Organic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843
Prague 2, Czech Republic
| | - Eva Hanikýřová
- Department of Organic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843
Prague 2, Czech Republic
| | - Anton Škríba
- Department of Organic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843
Prague 2, Czech Republic
| | - Juraj Jašík
- Department of Organic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843
Prague 2, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry,
Faculty of Science, Charles University in Prague, Hlavova 2030/8, 12843
Prague 2, Czech Republic
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23
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Basavaprabhu H, Sureshbabu VV. Iron(iii) catalysed synthesis of unsymmetrical di and trisubstituted ureas – a variation of classical Ritter reaction. Org Biomol Chem 2012; 10:2528-33. [DOI: 10.1039/c2ob06916d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Zhang H, Shen W, Rempel D, Monsey J, Vidavsky I, Gross ML, Bose R. Carboxyl-group footprinting maps the dimerization interface and phosphorylation-induced conformational changes of a membrane-associated tyrosine kinase. Mol Cell Proteomics 2011; 10:M110.005678. [PMID: 21422241 DOI: 10.1074/mcp.m110.005678] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Her4 is a transmembrane receptor tyrosine kinase belonging to the ErbB-EGFR family. It plays a vital role in the cardiovascular and nervous systems, and mutations in Her4 have been found in melanoma and lung cancer. The kinase domain of Her4 forms a dimer complex, called the asymmetric dimer, which results in kinase activation. Although a crystal structure of the Her4 asymmetric dimer is known, the dimer affinity and the effect of the subsequent phosphorylation steps on kinase domain conformation are unknown. We report here the use of carboxyl-group footprinting MS on a recombinant expressed, Her4 kinase-domain construct to address these questions. Carboxyl-group footprinting uses a water-soluble carbodiimide, 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide, in the presence of glycine ethyl ester, to modify accessible carboxyl groups on glutamate and aspartate residues. Comparisons of Her4 kinase-domain monomers versus dimers and of unphosphorylated versus phosphorylated dimers were made to map the dimerization interface and to determine phosphorylation induced-conformational changes. We detected 37 glutamate and aspartate residues that were modified, and we quantified their extents of modification by liquid chromatography MS. Five residues showed changes in carboxyl-group modification. Three of these residues are at the predicted dimer interface, as shown by the crystal structure, and the remaining two residues are on loops that likely have altered conformation in the kinase dimer. Incubating the Her4 kinase dimers with ATP resulted in dramatic increase in Tyr-850 phosphorylation, located on the activation loop, and this resulted in a conformational change in this loop, as evidenced by reduction in carboxyl-group modification. The kinase monomer-dimer equilibrium was measured using a titration format in which the extent of carboxyl-group footprinting was mathematically modeled to give the dimer association constant (1.5-6.8 × 10(12) dm(2)/mol). This suggests that the kinase-domain makes a significant contribution to the overall dimerization affinity of the full-length Her4 protein.
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Affiliation(s)
- Hao Zhang
- Department of Chemistry, Washington University, St. Louis, MO 63130, USA
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25
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Crane ZD, Nichols PJ, Sammakia T, Stengel PJ. Synthesis of Methyl-1-(tert-butoxycarbonylamino)-2-vinylcyclopropanecarboxylate via a Hofmann Rearrangement Utilizing Trichloroisocyanuric Acid as an Oxidant. J Org Chem 2010; 76:277-80. [DOI: 10.1021/jo101504e] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zackary D. Crane
- Department of Process Chemistry, Array Bio Pharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Paul J. Nichols
- Department of Process Chemistry, Array Bio Pharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Tarek Sammakia
- Department of Process Chemistry, Array Bio Pharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
| | - Peter J. Stengel
- Department of Process Chemistry, Array Bio Pharma Inc., 3200 Walnut Street, Boulder, Colorado 80301, United States
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26
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Marchand-Brynaert J, Ghosez L. Ring Enlargement of the β-Lactam Nucleus of Penicillins. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19850941123] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Studies on the Lossen-type rearrangement of N-(3-phenylpropionyloxy) phthalimide and N-tosyloxy derivatives with several nucleophiles. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.01.074] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Dubé P, Nathel NFF, Vetelino M, Couturier M, Aboussafy CL, Pichette S, Jorgensen ML, Hardink M. Carbonyldiimidazole-mediated Lossen rearrangement. Org Lett 2010; 11:5622-5. [PMID: 19908883 DOI: 10.1021/ol9023387] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Carbonyldiimidazole (CDI) was found to mediate the Lossen rearrangement of various hydroxamic acids to isocyanates. This process is experimentally simple and mild, with imidazole and CO(2) being the sole stoichiometric byproduct. Significant for large-scale application, the method avoids the use of hazardous reagents and thus represents a green alternative to standard processing conditions for the Curtius and Hofmann rearrangements.
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Affiliation(s)
- Pascal Dubé
- Chemical Research and Development, Pfizer Global Research and Development, Eastern Point Road, P.O. Box 8013, Groton, Connecticut 06340-8013, USA.
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29
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Rodrigues RC, Bolivar JM, Volpato G, Filice M, Godoy C, Fernandez-Lafuente R, Guisan JM. Improved reactivation of immobilized-stabilized lipase from Thermomyces lanuginosus by its coating with highly hydrophilic polymers. J Biotechnol 2009; 144:113-9. [DOI: 10.1016/j.jbiotec.2009.09.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2009] [Revised: 08/27/2009] [Accepted: 09/01/2009] [Indexed: 10/20/2022]
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30
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Immobilization–stabilization of the lipase from Thermomyces lanuginosus: Critical role of chemical amination. Process Biochem 2009. [DOI: 10.1016/j.procbio.2009.04.015] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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31
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Rodrigues RC, Bolivar JM, Palau-Ors A, Volpato G, Ayub MA, Fernandez-Lafuente R, Guisan JM. Positive effects of the multipoint covalent immobilization in the reactivation of partially inactivated derivatives of lipase from Thermomyces lanuginosus. Enzyme Microb Technol 2009. [DOI: 10.1016/j.enzmictec.2009.02.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Morita H, Takagi S, Chanmiya Sheikh M, Ogasawara A, Ohira M, Abe H. Lossen-Type Rearrangement Products in the Reaction of N-(Phthalimidoyloxy)-3-phenylpropionate and -tosylate with Benzyl Alcohol. HETEROCYCLES 2009. [DOI: 10.3987/com-09-11643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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Hoshino Y, Okuno M, Kawamura E, Honda K, Inoue S. Base-mediated rearrangement of free aromatic hydroxamic acids (ArCO–NHOH) to anilines. Chem Commun (Camb) 2009:2281-3. [DOI: 10.1039/b822806j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Narendra N, Chennakrishnareddy G, Sureshbabu VV. Application of carbodiimide mediated Lossen rearrangement for the synthesis of α-ureidopeptides and peptidyl ureas employing N-urethane α-amino/peptidyl hydroxamic acids. Org Biomol Chem 2009; 7:3520-6. [DOI: 10.1039/b905790k] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Fernandez-Lorente G, Godoy CA, Mendes AA, Lopez-Gallego F, Grazu V, de las Rivas B, Palomo JM, Hermoso J, Fernandez-Lafuente R, Guisan JM. Solid-Phase Chemical Amination of a Lipase from Bacillus thermocatenulatus To Improve Its Stabilization via Covalent Immobilization on Highly Activated Glyoxyl-Agarose. Biomacromolecules 2008; 9:2553-61. [DOI: 10.1021/bm800609g] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gloria Fernandez-Lorente
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Cesar A. Godoy
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Adriano A. Mendes
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Fernando Lopez-Gallego
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Valeria Grazu
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Blanca de las Rivas
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Jose M. Palomo
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Juan Hermoso
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Roberto Fernandez-Lafuente
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
| | - Jose M. Guisan
- Departamento de Microbiologia, Instituto de Fermentaciones Industriales (CSIC), C/Juan de la Cierva 3, 28006 CSIC, Madrid, Spain, Departamento de Biocatalisis, Instituto de Catalisis (CSIC), Campus UAM Cantoblanco, 28049 Madrid, Spain, Departamento de Engenharia Quimica, Universidade Federal de São Carlos, Rodovia Washington Luis, Km. 235, CP 676, CEP: 13565-905 São Carlos, SP, Brazil, and Departamento de Cristalografia, Instituto de Quimica-Fisica “Rocasolano” (CSIC), Serrano 119, 28006 Madrid, Spain
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36
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Takeuchi T, Horikawa R, Tanimura T. Spectrophotometry Determination of Carboxylic Acids by Ferric Hydroxamate Formation with Water-Soluble Carbodiimide. ANAL LETT 2006. [DOI: 10.1080/00032718008077690] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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37
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Needs PW, Rigby NM, Ring SG, MacDougall AJ. Specific degradation of pectins via a carbodiimide-mediated Lossen rearrangement of methyl esterified galacturonic acid residues. Carbohydr Res 2001; 333:47-58. [PMID: 11423110 DOI: 10.1016/s0008-6215(01)00120-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A specific, chemical degradation of the methyl esterified galacturonic acid residues of pectins is described. These residues are converted, with hydroxylamine, to hydroxamic acids, and then, with a carbodiimide, to isoureas; the latter undergo a Lossen rearrangement on alkaline hydrolysis. The isocyanates formed are hydrolysed to 5-aminoarabinopyranose derivatives, which spontaneously ring open to give 1,5-dialdehydes. The latter are reduced, in situ, to avoid peeling reactions, with sodium borohydride to give substituted arabitol residues. Thus, overall, partially esterified pectins are specifically cleaved to generate a series of oligogalacturonic acids bearing an arabitol residue as aglycone. Analysis of oligomers so generated discloses the pattern of contiguous nonesterification in a variety of pectins of differing degrees of esterification. Other potential applications are described.
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Affiliation(s)
- P W Needs
- Nutrition, Health, and Consumer Science Division, Institute of Food Research, Norwich Research Park, Colney Lane, Norwich NR4 7UA, UK.
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38
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Gratzer PF, Lee JM. Control of pH alters the type of cross-linking produced by 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) treatment of acellular matrix vascular grafts. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2001; 58:172-9. [PMID: 11241336 DOI: 10.1002/1097-4636(2001)58:2<172::aid-jbm1004>3.0.co;2-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Carbodiimide cross-linking of bioprosthetic materials has been shown to provide tissue stabilization equivalent to that of glutaraldehyde cross-linking, but without the risk of the release of unreacted or depolymerized cytotoxic reagent after implantation. In this study, the effects of 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) treatment on acellularized ovine carotid arteries were studied under two different pH conditions: (i) pH controlled at an optimal value of 5.5; and (ii) a simpler, but industrially significant, uncontrolled pH system. A multimode approach was employed involving biochemical assays, thermomechanical, tensile, and shear mechanical testing, and in vitro enzyme degradation analyses. EDC treatment decreased the hoop tangent modulus of acellular matrix (ACM) arterial grafts measured at 20 kPa of stress regardless of pH control. Extensibility of ACM arterial grafts measured at 20 kPa of stress was reduced after EDC treatment with pH control only. In contrast, shear stiffness of ACM arterial grafts increased to a greater degree under cross-linking without pH control (21 x compared to 14 x with pH control). Thermomechanical analyses revealed that EDC cross-linking with pH control also increased the collagen denaturation temperature of ACM arteries to a greater degree (a rise of 24.3 +/- 0.6 degrees C vs. 21.7 +/- 0.7 degrees C for no pH control), whereas cross-linking without pH control consumed a larger amount of lysine residues after 3 h of treatment. Most interestingly, both EDC treatments were equally effective in stabilizing ACM arteries against multiple degradative enzymes in vitro. The observed differences between EDC treatments under different pH conditions are attributed to differences in the location and types of the exogenous cross-links formed. The absence of pH control may have favored the formation of interfibrillar or intermolecular cross-links in collagen as well as involvement of other extracellular matrix components (proteoglycans and glycosaminoglycans). Furthermore, it may be emphasized that the location or type of cross-links differentially affected the mechanical behavior of treated materials without affecting the increase in resistance to enzymatic degradation.
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Affiliation(s)
- P F Gratzer
- School of Biomedical Engineering, Dalhousie University, 5981 University Avenue, Halifax, Nova Scotia B3H 3J5, Canada.
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39
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Stafford JA, Gonzales SS, Barrett DG, Suh EM, Feldman PL. Degradative Rearrangements of N-(t-Butyloxycarbonyl)-O-methanesulfonyl-hydroxamic Acids: A Novel, Reagent-Based Alternative to the Lossen Rearrangement1. J Org Chem 1998. [DOI: 10.1021/jo981498e] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey A. Stafford
- Glaxo Wellcome Research, Five Moore Drive, Research Triangle Park, North Carolina 27709
| | - Stephen S. Gonzales
- Glaxo Wellcome Research, Five Moore Drive, Research Triangle Park, North Carolina 27709
| | - David G. Barrett
- Glaxo Wellcome Research, Five Moore Drive, Research Triangle Park, North Carolina 27709
| | - Edward M. Suh
- Glaxo Wellcome Research, Five Moore Drive, Research Triangle Park, North Carolina 27709
| | - Paul L. Feldman
- Glaxo Wellcome Research, Five Moore Drive, Research Triangle Park, North Carolina 27709
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40
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Hirrlinger B, Stolz A. Formation of a Chiral Hydroxamic Acid with an Amidase from Rhodococcus erythropolis MP50 and Subsequent Chemical Lossen Rearrangement to a Chiral Amine. Appl Environ Microbiol 1997; 63:3390-3. [PMID: 16535682 PMCID: PMC1389238 DOI: 10.1128/aem.63.9.3390-3393.1997] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The amidase from Rhodococcus erythropolis MP50 demonstrated, in the presence of hydroxylamine, acyltransferase activity and catalyzed the formation of hydroxamates from amides and hydroxylamine. The rates of acyltransferase activity of the purified amidase for the substrates acetamide, phenylacetamide, and 2-phenylpropionamide were higher than the corresponding rates for the hydrolysis reactions. With the substrate 2-phenylpropionamide the hydrolysis reaction and the acyltransferase activity were highly enantioselective. The optically active 2-phenylpropionhydroxamate was converted by a chemical Lossen rearrangement in an aqueous medium into the enantiopure S-1-phenylethylamine.
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41
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Salomon CJ, Breuer E. Spontaneous Lossen Rearrangement of (Phosphonoformyl)hydroxamates. The Migratory Aptitude of the Phosphonyl Group. J Org Chem 1997. [DOI: 10.1021/jo962075k] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Claudio J. Salomon
- Department of Pharmaceutical Chemistry, The School of Pharmacy, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem, 91120 Israel
| | - Eli Breuer
- Department of Pharmaceutical Chemistry, The School of Pharmacy, The Hebrew University of Jerusalem, P.O. Box 12065, Jerusalem, 91120 Israel
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42
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Self-assembling urea-based peptidomimetics: A simple one-step synthesis and crystal structure of Core β-alanyl ureylene retro-bispeptides (MeOAaa[NHCONH]CH2CH2CONHAaaOMe; Aaa = amino acid A). Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)00960-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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43
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Waldmann H, Braun M, Dräger M. Asymmetric aza Diels-Alder reactions of amino acid ester imines with Brassard's diene. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/s0957-4166(00)80023-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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44
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Waldmann H, Braun M, Dräger M. Aminosäureester als chirale Hilfsgruppen in Lewis-Säure-katalysierten Umsetzungen elektronenreicher Siloxydiene mit Iminen. Angew Chem Int Ed Engl 1990. [DOI: 10.1002/ange.19901021212] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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45
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Kobayashi M, Ichishima E. Use of water-soluble 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide for the fluorescent determination of uronic acids and carboxylic acids. Anal Biochem 1990; 189:122-5. [PMID: 2278381 DOI: 10.1016/0003-2697(90)90056-f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Reaction between glucuronic acid and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) was monitored by the o-phthalaldehyde (OPA) method, which was developed for the fluorescent assay of compounds containing an amino group. About 1 nmol of glucuronic acid was detected by this method. This EDC-OPA method was effective in detecting not only acidic sugar but also carboxylic acid. Although the sensitivity of the EDC-OPA method was somewhat lower than that of amino acid determination by OPA, a very simple and convenient assay was attained for compounds containing a carboxyl group.
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Affiliation(s)
- M Kobayashi
- Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University, Miyagi, Japan
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Waldmann H. Asymmetrische Hetero-Diels-Alder-Reaktionen in wäßriger Lösung unter Verwendung von Aminosäureestern als chiralen Auxiliaren. ACTA ACUST UNITED AC 1989. [DOI: 10.1002/jlac.198919890145] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lepropre G, Fastrez J. Size and charge dependence of binding by azacyclophanes. ACTA ACUST UNITED AC 1987. [DOI: 10.1007/bf00655640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Effect of carbodiimide as a coupling reagent on the metal binding properties of desferrioxamine. J Radioanal Nucl Chem 1985. [DOI: 10.1007/bf02036316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Effect of water-soluble carbodiimide on gating in sodium channels. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 1984. [DOI: 10.1016/0005-2736(84)90303-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Rack M, Woll KH. Effects of chemical modification of carboxyl groups on the voltage-clamped nerve fiber of the frog. J Membr Biol 1984; 82:41-8. [PMID: 6334164 DOI: 10.1007/bf01870730] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Voltage-clamped single nerve fibers of the frog Rana esculenta were treated with the carboxyl group activating reagent N-ethoxy-carbonyl-2-ethoxy-1,2-dihydroquinoline (EEDQ) in the presence of different primary amines and without added amine. Carboxyl groups form stable amide bonds with primary amines in the presence of EEDQ. EEDQ treatment reduced the sodium current considerably and irreversibly, regardless of the presence of a primary amine in the Ringer's solution. The potassium current was also reduced. After modification the reduced sodium currents inactivated slowly and incompletely. The descending branch of the sodium current-voltage relation, INa(E), was shifted along the voltage axis in the depolarizing direction. The size of the shift was strongly dependent on the amine present during modification with EEDQ. The voltage-dependence of sodium inactivation, h infinity (E), was shifted to more positive values of membrane potential by EEDQ in the presence of ethylenediamine (11 mV) and glucosamine (3 mV). In contrast, a small shift to more negative potentials occurred in the presence of taurine (-3 mV) or without the addition of an amine (-2 mV). A tenfold increase of the calcium concentration still shifted the INa(E) and h infinity (E) curves of the chemically modified fibers. However, these shifts were smaller than those observed on untreated fibers. The currents remaining after the modification were completely blocked by tetrodotoxin; no change of the reversal potential occurred.
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