1
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Chouhan NK, Eedara A, Talati MN, Ambadipudi SSSSS, Andugulapati SB, Pabbaraja S. Glucosyltriazole amphiphile treatment attenuates breast cancer by modulating the AMPK signaling. Drug Dev Res 2024; 85:e22215. [PMID: 38837718 DOI: 10.1002/ddr.22215] [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: 02/12/2024] [Revised: 05/09/2024] [Accepted: 05/16/2024] [Indexed: 06/07/2024]
Abstract
Breast cancer is the second most frequent cancer among women. Out of various subtypes, triple-negative breast cancers (TNBCs) account for 15% of breast cancers and exhibit more aggressive characteristics as well as a worse prognosis due to their proclivity for metastatic progression and limited therapeutic strategies. It has been demonstrated that AMP-activated protein kinase (AMPK) has context-specific protumorigenic implications in breast cancer cells. A set of glucosyltriazole amphiphiles, consisting of acetylated (9a-h) and unmodified sugar hydroxyl groups (10a-h), were synthesized and subjected to in vitro biological evaluation. Among them, 9h exhibited significant anticancer activity against MDA-MB-231, MCF-7, and 4T1 cell lines with IC50 values of 12.5, 15, and 12.55 μM, respectively. Further, compound 9h was evaluated for apoptosis and cell cycle analysis in in vitro models (using breast cancer cells) and antitumour activity in an in vivo model (orthotopic mouse model using 4T1 cells). Annexin-V assay results revealed that treatment with 9h caused 34% and 28% cell death at a concentration of 15 or 7.5 μM, respectively, while cell cycle analysis demonstrated that 9h arrested the cells at the G2/M or G1 phase in MCF-7, MDA-MB-231 and 4T1 cells, respectively. Further, in vivo, investigation showed that compound 9h exhibited equipotent as doxorubicin at 7.5 mg/kg, and superior efficacy than doxorubicin at 15 mg/kg. The mechanistic approach revealed that 9h showed potent anticancer activity in an in vivo orthotopic model (4T1 cells) partly by suppressing the AMPK activation. Therefore, modulating the AMPK activation could be a probable approach for targeting breast cancer and mitigating cancer progression.
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Affiliation(s)
- Neeraj Kumar Chouhan
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Abhisheik Eedara
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India
| | - Mamta N Talati
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Sudha S S S S Ambadipudi
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India
| | - Sai Balaji Andugulapati
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology (IICT), Hyderabad, India
| | - Srihari Pabbaraja
- Department of Organic Synthesis & Process Chemistry, CSIR-Indian Institute of Chemical Technology (CSIR-IICT), Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
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2
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Laxio Arenas J, Lesma J, Ha-Duong T, Ranjan Sahoo B, Ramamoorthy A, Tonali N, Soulier JL, Halgand F, Giraud F, Crousse B, Kaffy J, Ongeri S. Composition and Conformation of Hetero- versus Homo-Fluorinated Triazolamers Influence their Activity on Islet Amyloid Polypeptide Aggregation. Chemistry 2024; 30:e202303887. [PMID: 38478740 DOI: 10.1002/chem.202303887] [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: 11/22/2023] [Indexed: 04/11/2024]
Abstract
Novel fluorinated foldamers based on aminomethyl-1,4-triazolyl-difluoroacetic acid (1,4-Tz-CF2) units were synthesized and their conformational behaviour was studied by NMR and molecular dynamics. Their activity on the aggregation of the human islet amyloid polypeptide (hIAPP) amyloid protein was evaluated by fluorescence spectroscopy and mass spectrometry. The fluorine labelling of these foldamers allowed the analysis of their interaction with the target protein. We demonstrated that the preferred extended conformation of homotriazolamers of 1,4-Tz-CF2 unit increases the aggregation of hIAPP, while the hairpin-like conformation of more flexible heterotriazolamers containing two 1,4-Tz-CF2 units mixed with natural amino acids from the hIAPP sequence reduces it, and more efficiently than the parent natural peptide. The longer heterotriazolamers having three 1,4-Tz-CF2 units adopting more folded hairpin-like and ladder-like structures similar to short multi-stranded β-sheets have no effect. This work demonstrates that a good balance between the structuring and flexibility of these foldamers is necessary to allow efficient interaction with the target protein.
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Affiliation(s)
- José Laxio Arenas
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Jacopo Lesma
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Tap Ha-Duong
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Bikash Ranjan Sahoo
- Biophysics, Department of Chemistry, Biomedical Engineering, Michigan Neuroscience Institute, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA
| | - Ayyalusamy Ramamoorthy
- Biophysics, Department of Chemistry, Biomedical Engineering, Michigan Neuroscience Institute, Macromolecular Science and Engineering, University of Michigan, Ann Arbor, MI 48109-1055, USA
| | - Nicolo Tonali
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Jean-Louis Soulier
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Frédéric Halgand
- Université Paris-Saclay, CNRS, Institut de Chimie Physique, 91405, Orsay, France
| | - François Giraud
- Equipe Biologie et Chimie Structurales, Dept Chimie et Biologie Structurales et Analytiques, ICSN, CNRS, Université Paris Saclay, 1 avenue de la terrasse, 91190, Gif sur Yvette, France
| | - Benoît Crousse
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Julia Kaffy
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
| | - Sandrine Ongeri
- Université Paris-Saclay, CNRS, BioCIS, Bat. Henri Moissan, 17 av. des Sciences, 91400, Orsay, France
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3
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Bag SS, Saraogi I, Guo J. Editorial: Expansion of the Genetic Code: Unnatural Amino Acids and their Applications. Front Chem 2022; 10:958433. [PMID: 36003617 PMCID: PMC9393736 DOI: 10.3389/fchem.2022.958433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 06/03/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Subhendu Sekhar Bag
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, India
- *Correspondence: Subhendu Sekhar Bag, ; Ishu Saraogi, ; Jiantao Guo,
| | - Ishu Saraogi
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, India
- *Correspondence: Subhendu Sekhar Bag, ; Ishu Saraogi, ; Jiantao Guo,
| | - Jiantao Guo
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, NE, United States
- *Correspondence: Subhendu Sekhar Bag, ; Ishu Saraogi, ; Jiantao Guo,
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4
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Laxio Arenas J, Xu Y, Milcent T, Van Heijenoort C, Giraud F, Ha-Duong T, Crousse B, Ongeri S. Fluorinated Triazole Foldamers: Folded or Extended Conformational Preferences. Chempluschem 2021; 86:241-251. [PMID: 33555641 DOI: 10.1002/cplu.202000791] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/27/2021] [Indexed: 12/16/2022]
Abstract
The Ministère de l'Enseignement Supérieur et de la Recherche (MESR) is thanked for financial support for José Laxio Arenas. The China Scholarship Council is thanked for financial support for Yaochun Xu. The authors thank Pr. Vadim Soloshonok and TOSOH F-TECH, Inc. for the kind gift of N-terbutyl-sulfinylimine.
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Affiliation(s)
- José Laxio Arenas
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
| | - Yaochun Xu
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
| | - Thierry Milcent
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
| | - Carine Van Heijenoort
- Equipe Biologie et Chimie Structurales, Dept Chimie et Biologie Structurales et Analytiques, ICSN, CNRS, Université Paris Saclay, 1 avenue de la terrasse, 91190, Gif sur Yvette, France
| | - François Giraud
- Equipe Biologie et Chimie Structurales, Dept Chimie et Biologie Structurales et Analytiques, ICSN, CNRS, Université Paris Saclay, 1 avenue de la terrasse, 91190, Gif sur Yvette, France
| | - Tap Ha-Duong
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
| | - Benoit Crousse
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
| | - Sandrine Ongeri
- BioCIS, CNRS, Université Paris Saclay, 5 rue Jean-baptiste Clément, 92296, Châtenay-Malabry Cedex, France
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5
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Palai BB, Sharma NK. N-Arylated peptide: troponyl residue influences the structure and conformation of N-troponylated-(di/tri)-peptides. CrystEngComm 2021. [DOI: 10.1039/d0ce01386b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
N-arylated peptides as peptoids influence the structural and conformational changes of small peptides that lead to unique foldamers, even in di-/tri-peptides.
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Affiliation(s)
- Bibhuti Bhusana Palai
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)-Bhubaneswar
- Jatni Campus
- Bhubaneswar
- India
| | - Nagendra K. Sharma
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)-Bhubaneswar
- Jatni Campus
- Bhubaneswar
- India
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6
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Deike S, Rothemund S, Voigt B, Samantray S, Strodel B, Binder WH. β-Turn mimetic synthetic peptides as amyloid-β aggregation inhibitors. Bioorg Chem 2020; 101:104012. [PMID: 32683138 DOI: 10.1016/j.bioorg.2020.104012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/09/2020] [Accepted: 06/10/2020] [Indexed: 12/28/2022]
Abstract
Aggregation of amyloid peptides results in severe neurodegenerative diseases. While the fibril structures of Aβ40 and Aβ42 have been described recently, resolution of the aggregation pathway and evaluation of potent inhibitors still remains elusive, in particular in view of the hairpin-region of Aβ40. We here report the preparation of beta-turn mimetic conjugates containing synthetic turn mimetic structures in the turn region of Aβ40 and Aβ16-35, replacing 2 amino acids in the turn-region G25 - K28. The structure of the turn mimic induces both, acceleration of fibrillation and the complete inhibition of fibrillation, confirming the importance of the turn region on the aggregation. Replacing position G25-S26 provided the best inhibition effect for both beta-turn mimetics, the bicyclic BTD 1 and the aromatic TAA 2, while positions N27-K28 and V24-G25 showed only weaker or no inhibitory effects. When comparing different turn mimetics at the same position (G25-S26), conjugate 1a bearing the BTD turn showed the best inhibition of Aβ40 aggregation, while 5-amino-valeric acid 4a showed the weakest effect. Thus there is a pronounced impact on fibrillation with the chemical nature of the embedded beta-turn-mimic: the conformationally constrained turns 1 and 2 lead to a significantly reduced fibrillation, even inhibiting fibrillation of native Aβ40 when added in amounts down to 1/10, whereas the more flexible beta-turn-mimics 4-amino-benzoic acid 3a and 5-amino-valeric acid 4a lead to enhanced fibrillation. Toxicity-testing of the most successful conjugate showed only minor toxicity in cell-viability assays using the N2a cell line. Structural downsizing lead to the short fragment BTD/peptide Aβ16-35 as inhibitor of the aggregation of Aβ40, opening large potential for further small peptide based inhibitors.
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Affiliation(s)
- Stefanie Deike
- Department of Chemistry, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany
| | - Sven Rothemund
- Core Unit Peptid-Technologien, University Leipzig, Liebigstr. 21, 04103 Leipzig, Germany
| | - Bruno Voigt
- Department of Physics, Martin Luther University Halle-Wittenberg, Betty-Heimannstrasse 7 4, 06120 Halle, Germany
| | - Suman Samantray
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, 52428 Jülich, Germany
| | - Birgit Strodel
- Institute of Biological Information Processing (IBI-7: Structural Biochemistry), Forschungszentrum Jülich, 52428 Jülich, Germany; Institute of Theoretical and Computational Chemistry, Heinrich Heine University Düsseldorf, 40225 Düsseldorf, Germany
| | - Wolfgang H Binder
- Department of Chemistry, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 4, 06120 Halle, Germany.
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7
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Virelli M, Wang W, Kuniyil R, Wu J, Zanoni G, Fernandez A, Scott J, Vendrell M, Ackermann L. BODIPY‐Labeled Cyclobutanes by Secondary C(sp
3
)−H Arylations for Live‐Cell Imaging. Chemistry 2019; 25:12712-12718. [DOI: 10.1002/chem.201903461] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 08/19/2019] [Indexed: 02/06/2023]
Affiliation(s)
- Matteo Virelli
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
| | - Wei Wang
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Rositha Kuniyil
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Jun Wu
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
| | - Giuseppe Zanoni
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
| | - Antonio Fernandez
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Jamie Scott
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Marc Vendrell
- Centre for Inflammation ResearchThe University of Edinburgh EH16 4TJ Edinburgh UK
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare ChemieGeorg-August-Universität Göttingen Tammannstraße 2 37077 Göttingen Germany
- Department of ChemistryUniversity of Pavia Viale Taramelli 10 27100 Pavia Italy
- German Center for Cardiovascular Research (DZHK) Potsdamer Strasse 58 10785 Berlin Germany
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8
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FRET events in fluorescent pentapeptides containing aliphatic triazolo amino acid scaffolds: Role of spacer lengths. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Bag SS, De S. Pyrenylthioureayl Alanine as a Switch‐On Fluorescent Sensor for Hg(II) Ions. ChemistrySelect 2018. [DOI: 10.1002/slct.201802249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Subhendu Sekhar Bag
- Department of Chemistry and Centre for the EnvironmentIndian Institute of Technology Guwahati North Guwhati-781039, Assam India
| | - Suranjan De
- Department of Chemistry and Centre for the EnvironmentIndian Institute of Technology Guwahati North Guwhati-781039, Assam India
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10
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Zhai L, Wang S, Nara M, Takeuchi K, Shimada I, Otani Y, Ohwada T. Application of C-Terminal 7-Azabicyclo[2.2.1]heptane to Stabilize β-Strand-like Extended Conformation of a Neighboring α-Amino Acid. J Org Chem 2018; 83:13063-13079. [DOI: 10.1021/acs.joc.8b01756] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Luhan Zhai
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Siyuan Wang
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masayuki Nara
- Department of Chemistry, College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, Chiba 272-0827, Japan
| | - Koh Takeuchi
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Aomi, Koto-ku, Tokyo 135-0064, Japan
| | - Ichio Shimada
- Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology (AIST), Aomi, Koto-ku, Tokyo 135-0064, Japan
- Laboratory of Physical Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Yuko Otani
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tomohiko Ohwada
- Laboratory of Organic and Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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11
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Tung J, Tew LS, Coluccini C, Lin YD, Khung YL. Grafting Behavior for the Resonating Variants of Ethynylaniline on Hydrogenated Silicon (100) Surfaces under Thermal Hydrosilylation. Chemistry 2018; 24:13270-13277. [PMID: 29932257 DOI: 10.1002/chem.201802003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 06/20/2018] [Indexed: 11/09/2022]
Abstract
This work reports the outcome of thermal grafting of 2-ethynylaniline, 3-ethynylaniline, and 4-ethynylaniline on a hydrogenated Si(100) surface. Using high-resolution XPS and AFM, it was found that the grafting of these compounds could be attributed to resonating structures that arise from the position of an electron-donating NH2 group and an electron-withdrawing acetylene group. For the ortho- and para-positioned acetylene group, surface reactions were observed to proceed predominantly via the acetylene to form a Si-C bond, whereas the meta-positioned acetylene group was found to have undergone nucleophilic grafting through the NH2 group onto the silicon surface to form a Si-N bond. Furthermore, a tert-butoxycarbonyl-protected derivative for a meta-positioned ethynylaniline was synthesized to exclusively force the reaction to react with the acetylene group and subsequent analysis confirmed that unprotected 3-ethynylaniline had indeed reacted through the nucleophilic NH2 group as hypothesized. Thus, for the first time, the interplay between resonance structures and their effects on silicon surface modifications were systematically catalogued.
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Affiliation(s)
- Joline Tung
- College of Arts and Sciences, University of North Carolina at Chapel Hill (UNC), Chapel Hill, NC, 27514, USA
| | - Lih Shin Tew
- Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, 13200, Kepala Batas Pulau Pinang, Malaysia
| | - Carmine Coluccini
- Institute of New Drug Development, China Medical University, No.91 Hsueh-Shih Road, Taichung, Taiwan
| | - Yue-Der Lin
- Department of Automatic Control Engineering, Feng Chia University, No. 100, Wenhwa Rd., Seatwen, Taichung, Taiwan
| | - Yit Lung Khung
- Department of Biological Science and Technology, China Medical University, No.91 Hsueh-Shih Road, Taichung, Taiwan
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12
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Bag SS, De S. Multipurpose isothiocyanyl alanine/lysine: Use as solvatochromic IR probes and in site specific labeling/ligation of short peptides. Bioorg Med Chem Lett 2018; 28:1404-1409. [PMID: 29555154 DOI: 10.1016/j.bmcl.2018.02.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 01/27/2018] [Accepted: 02/10/2018] [Indexed: 10/18/2022]
Abstract
The solvatochromic IR responsivity of small side chain -NCS in two unexplored unnatural amino acids, isothiocyanyl alanine (NCSAla = Ita) and lysine (NCSLys = Itl), without perturbing the conformation is demonstrated in two designed short tripeptide (BocAla-NCSAla-Ala-OMe) and hexapeptide (BocLeu-Val-Phe-Phe-NCSLys-Gly-OMe). Demonstration of site specific fluorescent labeling in both the peptides and ligation type reaction in NCSLys indicates the novelty of these two amino acids as alternative to the available canonical amino acids.
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Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Suranjan De
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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13
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Bag SS, Yashmeen A. A relay FRET event in a designed trichromophoric pentapeptide containing an o-, m-aromatic-amino acid scaffold. Chem Commun (Camb) 2018; 54:9765-9768. [DOI: 10.1039/c8cc04429e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The concept of a relay FRET event is established in a designed trichromophoric pentapeptide containing an o-,m-aromatic amino acid scaffold in the backbone as a novel β-turn mimetic β-sheet folding nucleator.
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Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwahati-781039
- India
| | - Afsana Yashmeen
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwahati-781039
- India
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14
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Bag SS, Yashmeen A. Uracil-amino acid as a scaffold for β-sheet peptidomimetics: Study of photophysics and interaction with BSA protein. Bioorg Med Chem Lett 2017; 27:5387-5392. [PMID: 29153423 DOI: 10.1016/j.bmcl.2017.11.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 11/05/2017] [Accepted: 11/08/2017] [Indexed: 10/18/2022]
Abstract
We report herein the uracil-di-aza-amino acid (UrAA) as a new family of molecular scaffold to induce β-hairpin structure with H-bonded β-sheet conformation in a short peptide. This has been demonstrated in two conceptual fluorescent pentapeptides wherein triazolylpyrenyl alanine and/or triazolylmethoxynapthyl alanine (TPyAlaDo and/or TMNapAlaDo) are embedded into two arms of the uracil-amino acid via an intervening leucine. Conformational analysis by CD, IR, variable temperature and 2D NMR spectroscopy reveals the β-hairpin structures for both the peptides. Study of photophysical property reveals that the pentapeptide containing fluorescent triazolyl unnatural amino acids TMNapAlaDo and TPyAlaDo at the two termini exhibits dual path entry to exciplex emission-either via FRET from TMNapAlaDo to TPyAlaDo or via direct excitation of a FRET acceptor, TPyAlaDo. The other pentapeptide with TPyAlaDo/TPyAlaDo pair shows excimer emission. Furthermore, both the peptides maintaining their fundamental photophysics are found to interact with BSA as only a test biomolecule.
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Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati, North Guwhati 781039, Assam, India.
| | - Afsana Yashmeen
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati, North Guwhati 781039, Assam, India
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15
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Bauer M, Wang W, Lorion MM, Dong C, Ackermann L. Internal Peptide Late-Stage Diversification: Peptide-Isosteric Triazoles for Primary and Secondary C(sp 3 )-H Activation. Angew Chem Int Ed Engl 2017; 57:203-207. [PMID: 29135064 DOI: 10.1002/anie.201710136] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/11/2017] [Indexed: 12/16/2022]
Abstract
Secondary C(sp3 )-H arylations were accomplished by palladium catalysis with triazoles as peptide bond isosteres. The unique power of this approach is highlighted by the possibility of achieving secondary C(sp3 )-H functionalizations on terminal peptides as well as the unprecedented positional-selective C(sp3 )-H functionalization of internal peptide positions, setting the stage for modular peptide late-stage diversification.
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Affiliation(s)
- Michaela Bauer
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammanstraße 2, 37077, Göttingen, Germany
| | - Wei Wang
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammanstraße 2, 37077, Göttingen, Germany
| | - Mélanie M Lorion
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammanstraße 2, 37077, Göttingen, Germany
| | - Chuan Dong
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammanstraße 2, 37077, Göttingen, Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammanstraße 2, 37077, Göttingen, Germany
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16
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Internal Peptide Late-Stage Diversification: Peptide-Isosteric Triazoles for Primary and Secondary C(sp3
)−H Activation. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710136] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Bag SS, De S. Isothiocyanyl Alanine as a Synthetic Intermediate for the Synthesis of Thioureayl Alanines and Subsequent Aminotetrazolyl Alanines. J Org Chem 2017; 82:12276-12285. [PMID: 29065260 DOI: 10.1021/acs.joc.7b02103] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The synthesis of unnatural amino acids with small side-chain functionalities usable for further transformations is highly demanding for the expansion of the genetic code and other possible biotechnological applications. To this end, we wanted to report the utility of an unexplored unnatural amino acid, isothiocyanyl alanine (NCSAla = Ita), for the synthesis of another class of unnatural amino acids, thioureayl alanines (TUAla = Tua). The synthesis of a third class of unnatural amino acids, amino tetrazolyl alanines (ATzAla = Ata), in a very good yield was subsequently achieved utilizing thioureayl alanines. Thus, a variety of aliphatic- and aromatic-substituted thioureayl alanines and aromatic-substituted amino tetrazolyl alanines were successfully synthesized in good to excellent yields. The photophysical properties of three of the fluorescent unnatural amino acids from two classes were also studied and presented herein.
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Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati 781039, India
| | - Suranjan De
- Bioorganic Chemistry Laboratory, Department of Chemistry, Indian Institute of Technology Guwahati 781039, India
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18
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Bag SS, Jana S. Axially chiral amino acid scaffolds as efficient fluorescent discriminators of methanol–ethanol. NEW J CHEM 2017. [DOI: 10.1039/c7nj01945a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Differential solvation guided H-bonding interaction allows novel axially chiral amino acid scaffolds for efficient discrimination of ethanol–methanolviaa switch-on fluorescence response.
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Affiliation(s)
- Subhendu Sekhar Bag
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
- Centre for the Environment
| | - Subhashis Jana
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
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19
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Mamone M, Gonçalves RSB, Blanchard F, Bernadat G, Ongeri S, Milcent T, Crousse B. N-Difluoromethyl-triazole as a constrained scaffold in peptidomimetics. Chem Commun (Camb) 2017; 53:5024-5027. [PMID: 28429026 DOI: 10.1039/c7cc01298e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The N-difluoromethyl triazolo-β-aza-ε-amino acid present in the core of peptides led to constrained conformations due to CH–F and NH–F interactions.
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Affiliation(s)
- M. Mamone
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - R. S. B. Gonçalves
- Departamento de Química Orgânica
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Rio de Janeiro
- Brazil
| | - F. Blanchard
- Institut de Chimie des Substances Naturelles
- CNRS UPR 2301
- Univ. Paris-Sud
- Université Paris-Saclay
- 91198 Gif-sur-Yvette
| | - G. Bernadat
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - S. Ongeri
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - T. Milcent
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
| | - B. Crousse
- Univ Paris-Sud
- BioCIS
- CNRS
- Faculté de Pharmacie
- 92290 Châtenay-Malabry
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20
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Bag SS, Jana S, Pradhan MK. Synthesis, photophysical properties of triazolyl-donor/acceptor chromophores decorated unnatural amino acids: Incorporation of a pair into Leu-enkephalin peptide and application of triazolylperylene amino acid in sensing BSA. Bioorg Med Chem 2016; 24:3579-95. [DOI: 10.1016/j.bmc.2016.05.069] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/29/2016] [Accepted: 05/30/2016] [Indexed: 02/03/2023]
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21
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Modell AE, Blosser SL, Arora PS. Systematic Targeting of Protein-Protein Interactions. Trends Pharmacol Sci 2016; 37:702-713. [PMID: 27267699 DOI: 10.1016/j.tips.2016.05.008] [Citation(s) in RCA: 109] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 05/14/2016] [Accepted: 05/16/2016] [Indexed: 12/22/2022]
Abstract
Over the past decade, protein-protein interactions (PPIs) have gone from being neglected as 'undruggable' to being considered attractive targets for the development of therapeutics. Recent advances in computational analysis, fragment-based screening, and molecular design have revealed promising strategies to address the basic molecular recognition challenge: how to target large protein surfaces with specificity. Several systematic and complementary workflows have been developed to yield successful inhibitors of PPIs. Here we review the major contemporary approaches utilized for the discovery of inhibitors and focus on a structure-based workflow, from the selection of a biological target to design.
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Affiliation(s)
- Ashley E Modell
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Sarah L Blosser
- Department of Chemistry, New York University, New York, NY 10003, USA
| | - Paramjit S Arora
- Department of Chemistry, New York University, New York, NY 10003, USA
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22
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Bag SS, Jana S, Pradhan MK, Pal S. Trichromophoric pentapeptide: impact of β-sheet conformation on dual path to excimer emission and sensing of BSA. RSC Adv 2016. [DOI: 10.1039/c6ra14084j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We established dual mechanisms for excimer emission-either via FRET or direct excitation of a FRET acceptor- in a conceptually novel trichromophoric pentapeptide which serves as an effective fluorescence light-up probe for protein–peptide interaction.
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Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Subhashis Jana
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Manoj Kumar Pradhan
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Sunit Pal
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
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