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Agarwala P, Ghosh A, Hazarika P, Acharjee D, Ghosh S, Rout D, Sasmal DK. Unraveling the Interaction of Diflunisal with Cyclodextrin and Lysozyme by Fluorescence Spectroscopy. J Phys Chem B 2023; 127:9710-9723. [PMID: 37917720 DOI: 10.1021/acs.jpcb.3c04295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Abstract
Understanding the interaction between the drug:carrier complex and protein is essential for the development of a new drug-delivery system. However, the majority of reports are based on an understanding of interactions between the drug and protein. Here, we present our findings on the interaction of the anti-inflammatory drug diflunisal with the drug carrier cyclodextrin (CD) and the protein lysozyme, utilizing steady-state and time-resolved fluorescence spectroscopy. Our findings reveal a different pattern of molecular interaction between the inclusion complex of β-CD (β-CD) or hydroxypropyl-β-CD (HP-β-CD) (as the host) and diflunisal (as the guest) in the presence of protein lysozyme. The quantum yield for the 1:2 guest:host complex is twice that of the 1:1 guest:host complex, indicating a more stable hydrophobic microenvironment created in the 1:2 complex. Consequently, the nonradiative decay pathway is significantly reduced. The interaction is characterized by ultrafast solvation dynamics and time-resolved fluorescence resonance energy transfer. The solvation dynamics of the lysozyme becomes 10% faster under the condition of binding with the drug, indicating a negligible change in the polar environment after binding. In addition, the fluorescence lifetime of diflunisal (acceptor) is increased by 50% in the presence of the lysozyme (donor), which indicates that the drug molecule is bound to the binding pocket on the surface of the protein, and the average distance between active tryptophan in the hydrophobic region and diflunisal is calculated to be approximately 50 Å. Excitation and emission matrix spectroscopy reveals that the tryptophan emission increases 3-5 times in the presence of both diflunisal and CD. This indicates that the tryptophan of lysozyme may be present in a more hydrophobic environment in the presence of both diflunisal and CD. Our observations on the interaction of diflunisal with β-CD and lysozyme are well supported by molecular dynamics simulation. Results from this study may have an impact on the development of a better drug-delivery system in the future. It also reveals a fundamental molecular mechanism of interaction of the drug-carrier complex with the protein.
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Affiliation(s)
- Pratibha Agarwala
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Arabinda Ghosh
- Department of Computational Biology and Biotechnology, Mahapurusha Srimanta Sankaradeva Viswavidyalaya, Guwahati Unit, Guwahati, Assam 781032, India
| | - Priyanka Hazarika
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Debopam Acharjee
- School of Chemical Sciences, National Institute of Science Education and Research, An OCC of Homi Bhabha National Institute (HBNI), Khurda, Odisha 752050, India
| | - Shirsendu Ghosh
- Department of Chemistry, Gandhi Institute of Technology and Management (GITAM), Hyderabad Campus, Hyderabad 502329, India
| | - Debasish Rout
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
| | - Dibyendu K Sasmal
- Department of Chemistry, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan 342037, India
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Yang S, Chu Y, Gu L, Ding CF, Wang F. Ternary complexes of cyclodextrins with alkali earth cations and amino acids in gas phase investigated by mass spectrometry. Talanta 2023; 259:124522. [PMID: 37031542 DOI: 10.1016/j.talanta.2023.124522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 03/29/2023] [Accepted: 04/01/2023] [Indexed: 04/07/2023]
Abstract
Noncovalent ternary complexes between cyclodextrins (CDs), small molecules and alkali earth cations drew growing attention due to their potential application in many chemical and pharmaceutical fields. To date, the main factors affect the formation mechanism of noncovalent ternary complexes in gas phase have not been fully investigated. In this study, ternary complexes of CDs, divalent metal cations and amino acids (AAs) were investigated by electrospray ionization mass spectrometry (ESI-MS), demonstrating the formation of 1:1:1 stoichiometric noncovalent ternary complex of [CD + cation(II)+AA]2+ in gas phase. The results revealed that only +2 valence cations can form stable ternary complexes in ESI-MS. The ratio of peak intensities for [β-CD + Mg(II)+AA]2+ to those for [β-CD + Mg(II)]2+ hydrophobicity of AAs was also determined to discuss the effect of hydrophobicity of AAs. Exceptions exist for Pro, Gly, and Val indicated that other factors such as side-chain structure and rigidity of AAs can also influence the binding strength for ternary complexes. Collision induced dissociations (CID) were performed to further confirm the formation of the β-CD ternary complexes, revealing the binding strength of [CD + Mg(II)+Phe]2+ decreased in the order of γ-CD, β-CD, and α-CD. Although Leu and Ile are isomers, the ESI-MS demonstrated the peak intensity for ternary complexe of [β-CD + Mg(II)+Ile]2+ exhibited stronger than that of [β-CD + Mg(II)+Leu]2+, DFT theoretical calculations were conducted to explain the phenomenon. The calculation indicated when Mg2+ existing, the conformations of the two ternary complexes could be affected due to the electrostatic force. In the complexes, the Leu and Ile turn a way round, inserting to the cavity with their carboxylic acid side into the large rim side of β-CD and interacting with Mg2+. This work not only clearly explained the factors influencing the formation of [CD + cation(II)+AA]2+ in gas phase, but it also provides an insight in designing ternary complexes for areas such as drug design and chiral discrimination.
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Affiliation(s)
- Shutong Yang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200438, China
| | - Yanqiu Chu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200438, China.
| | - Liancheng Gu
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200438, China
| | - Chuan-Fan Ding
- Zhejiang Provincial Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Fengyan Wang
- Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Centre of Chemistry for Energy Materials (iChEM), Fudan University, Shanghai, 200438, China.
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Joseph V, Levine M. Ronald C.D. Breslow (1931-2017): A career in review. Bioorg Chem 2021; 115:104868. [PMID: 34523507 DOI: 10.1016/j.bioorg.2021.104868] [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: 02/02/2021] [Accepted: 03/23/2021] [Indexed: 11/26/2022]
Abstract
Reviewed herein are key research accomplishments of Professor Ronald Charles D. Breslow (1931-2017) throughout his more than 60 year research career. These accomplishments span a wide range of topics, most notably physical organic chemistry, medicinal chemistry, and bioorganic chemistry. These topics are reviewed, as are topics of molecular electronics and origin of chirality, which combine to make up the bulk of this review. Also reviewed briefly are Breslow's contributions to the broader chemistry profession, including his work for the American Chemical Society and his work promoting gender equity. Throughout the article, efforts are made to put Breslow's accomplishments in the context of other work being done at the time, as well as to include subsequent iterations and elaborations of the research.
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Affiliation(s)
- Vincent Joseph
- Department of Chemical Sciences, Ariel University, Israel
| | - Mindy Levine
- Department of Chemical Sciences, Ariel University, Israel.
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4
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Ishimaru Y, Saito Y, Shiraishi YS, Esumi Y, Terunuma D, Kuzuhara H, Matsuoka K. Synthetic assembly of two β-cyclodextrins through a trehalose moiety as a linker. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Wu HH, Garidel P, Michaela B. HP-β-CD for the formulation of IgG and Ig-based biotherapeutics. Int J Pharm 2021; 601:120531. [PMID: 33775727 DOI: 10.1016/j.ijpharm.2021.120531] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/11/2021] [Accepted: 03/20/2021] [Indexed: 12/14/2022]
Abstract
The main challenge to develop HCF for IgG and Ig-based therapeutics is to achieve essential solubility, viscosity and stability of these molecules in order to maintain product quality and meet regulatory requirement during manufacturing, production, storage, shipment and administration processes. The commonly used and FDA approved excipients for IgG and Ig -based therapeutics may no longer fulfil the challenge of HCF development for these molecules to certain extent, especially for some complex Ig-based platforms. 2-Hydroxypropyl beta-cyclodextrin (HP-β-CD) is one of the promising excipients applied recently for HCF development of IgG and Ig-based therapeutics although it has been used for formulation of small synthesized chemical drugs for more than thirty years. This review describes essential aspects about application of HP-β-CD as excipient in pharmaceutical formulation, including physico-chemical properties of HP-β-CD, supply chain, regulatory, patent landscape, marketed drugs with HP-β-CD, analytics and analytical challenges, stability and control strategies, and safety concerns. It also provides an overview of different studies, and outcomes thereof, regarding formulation development for IgGs and Ig-based molecules in liquid and solid (lyophilized) dosage forms with HP-β-CD. The review specifically highlights the challenges for formulation manufacturing of IgG and Ig-based therapeutics with HP-β-CD and identifies areas for future work in pharmaceutical and formulation development.
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Affiliation(s)
- Helen Haixia Wu
- Boehringer Ingelheim Pharma GmbH & Co. KG, Innovation Unit, Pharmaceutical Development Biologicals, Biberach an der Riss, Germany.
| | - Patrick Garidel
- Boehringer Ingelheim Pharma GmbH & Co. KG, Innovation Unit, Pharmaceutical Development Biologicals, Biberach an der Riss, Germany
| | - Blech Michaela
- Boehringer Ingelheim Pharma GmbH & Co. KG, Innovation Unit, Pharmaceutical Development Biologicals, Biberach an der Riss, Germany
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6
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Katz JR, Day IJ. Using Small-Molecule Probes to Investigate Aggregation of Sunset Yellow FCF: What are the Concentration Limits? J Phys Chem B 2019; 123:8987-8994. [PMID: 31560194 DOI: 10.1021/acs.jpcb.9b07997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The assembly of small molecules into larger structures, often driven by noncovalent interactions such as hydrogen bonding, aromatic stacking interactions, and burial of hydrophobic surface, is of widespread interest. The interaction of small molecules with aggregates also has a large range of applications from fluorescence aggregation assays to gas storage in framework materials. Here, we utilize nuclear magnetic resonance spectroscopy to investigate the interaction of a small-molecule probe on the assembly state of sunset yellow across a wide range of relative concentrations. Information from both macroscopic (diffusion) and microscopic (chemical shifts) measurements allows the interaction to be studied and the binding mode to be interrogated. Using fluorophenol as the small-molecule probe, we show that the aggregation behavior of sunset yellow is broadly unaffected by the relative amount of fluorophenol added.
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Affiliation(s)
- Jonathan R Katz
- School of Life Sciences , University of Sussex , Falmer , Brighton BN1 9QJ , U.K
| | - Iain J Day
- School of Life Sciences , University of Sussex , Falmer , Brighton BN1 9QJ , U.K
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7
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Modulation of aggregation of silk fibroin by synergistic effect of the complex of curcumin and β-cyclodextrin. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2019; 1867:416-425. [PMID: 30677520 DOI: 10.1016/j.bbapap.2019.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/14/2018] [Accepted: 01/18/2019] [Indexed: 02/07/2023]
Abstract
Amyloid aggregation has been associated with numerous human pathological diseases. A recent study has demonstrated that silk fibroin intermittently endorses amyloidogenesis in vivo. In the current study, we explored the propensity of silk fibroin to undergo amyloid-like aggregation and its prevention using an optimized concoction of curcumin with β-cyclodextrin. Aggregation of silk fibroin resulted in the formation of fibrils with a diameter of ~3.2 nm. However, addition of the optimized concentration of curcumin and β-cyclodextrin to silk fibroin inhibited aggregation and preserved the random coil conformation even under aggregation inducing conditions, as demonstrated by CD and FTIR spectroscopy. Benzene rings of curcumin interact with the aromatic residues of fibroin via hydrophobic interactions. However, β-cyclodextrin preferentially interacts with the non-polar residues, which are the core components for nucleation dependent protein aggregation. The present study demonstrates the ability of the concoction of curcumin and β-cyclodextrin in tuning the self assembly process of fibroin. It also provides a platform to explore the assembly process of nano-fibril and hierarchical structures in vitro along with a novel insight for designing clinically relevant silk-based functional biomaterials.
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8
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Dubey P, Ghosh S, Banerjee S. WITHDRAWN: Synergistic Effect of Curcumin and β-cyclodextrin on Inhibition of Silk Fibroin Self Assembly. Arch Biochem Biophys 2018:S0003-9861(18)30514-9. [PMID: 30145114 DOI: 10.1016/j.abb.2018.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/12/2018] [Accepted: 08/21/2018] [Indexed: 11/21/2022]
Affiliation(s)
- Priyanka Dubey
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sourabh Ghosh
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sauradipta Banerjee
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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9
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Abstract
A key challenge in chemical biology is to identify small molecule regulators for every single protein. However, protein surfaces are notoriously difficult to recognise with synthetic molecules, often having large flat surfaces that are poorly matched to traditional small molecules. In the surface mimetic approach, a supramolecular scaffold is used to project recognition groups in such a manner as to make multivalent non-covalent contacts over a large area of protein surface. Metal based supramolecular scaffolds offer unique advantages over conventional organic molecules for protein binding, including greater stereochemical and geometrical diversity conferred through the metal centre and the potential for direct assessment of binding properties and even visualisation in cells without recourse to further functionalisation. This feature article will highlight the current state of the art in protein surface recognition using metal complexes as surface mimetics.
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Affiliation(s)
- Sarah H Hewitt
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Andrew J Wilson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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10
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Estalayo-Adrián S, Garnir K, Moucheron C. Perspectives of ruthenium(ii) polyazaaromatic photo-oxidizing complexes photoreactive towards tryptophan-containing peptides and derivatives. Chem Commun (Camb) 2018; 54:322-337. [DOI: 10.1039/c7cc06542f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This review focuses on recent advances in the search for RuII polyazaaromatic complexes as molecular photoreagents for tryptophan-containing peptides and proteins, in view of future biomedical applications.
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Affiliation(s)
- S. Estalayo-Adrián
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles, (U. L. B.)
- 1050 Bruxelles
- Belgium
| | - K. Garnir
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles, (U. L. B.)
- 1050 Bruxelles
- Belgium
| | - C. Moucheron
- Organic Chemistry and Photochemistry
- Université Libre de Bruxelles, (U. L. B.)
- 1050 Bruxelles
- Belgium
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11
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Oliveri V, Vecchio G. Cyclodextrins as Protective Agents of Protein Aggregation: An Overview. Chem Asian J 2016; 11:1648-57. [PMID: 27037956 DOI: 10.1002/asia.201600259] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Indexed: 11/08/2022]
Abstract
Cyclodextrins are extensively used in different fields (e.g., catalysis, chromatography, pharma, supramolecular chemistry, bioorganic chemistry, and bioinorganic chemistry), and their applications have been widely reviewed. Their main application in the field of pharmaceutical is as a drug carrier. This review overviews, for the first time, the use of cyclodextrins and their derivatives as antiaggregant agents in a number of proteins (e.g., amyloid-β, insulin, recombinant human growth hormone, prion protein, transthyretin, and α-synuclein) and some multimeric enzymes. There are many diseases that are correlated to protein misfolding and amyloid formation processes affecting numerous organs and tissues. There are over 30 different amyloid proteins and a number of corresponding diseases. Alzheimer's disease is the most common neurodegenerative disease. Treatment of these diseases is still a goal to reach, and many molecules are studied in this perspective. Cyclodextrins have also been studied, and they show great potential; as such, further studies could be very promising. This review aims to be a stimulus for the design of new cyclodextrin derivatives to obtain multifunctional systems with antiaggregant activity.
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Affiliation(s)
- Valentina Oliveri
- Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria 6, 95125, Catania, Italy.,Consorzio Interuniversitario di Ricerca in Chimica dei Metalli nei Sistemi Biologici, C.I.R.C.M.S.B, Unità di Ricerca di Catania, 95125, Catania, Italy
| | - Graziella Vecchio
- Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria 6, 95125, Catania, Italy.
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12
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Cho E, Jeong D, Paik HD, Jung S. Solubility Enhancement of Flavonols in the Inclusion Complex with Thioether-bridged Dimeric β-Cyclodextrins. B KOREAN CHEM SOC 2014. [DOI: 10.5012/bkcs.2014.35.8.2487] [Citation(s) in RCA: 6] [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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13
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Maxwell DS, Sun D, Peng Z, Martin DV, Bhanu Prasad BA, Bornmann WG. Synthesis of a Macrocycle Based on Linked Amino Acid Mimetics (LAAM). Tetrahedron Lett 2013; 54:5799-5801. [PMID: 25110365 DOI: 10.1016/j.tetlet.2013.08.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report the synthesis of a macrocycle utilizing a novel framework of standard amino acids in combination with subunits that we have named as Linked Amino Acid Mimetics (LAAM's). Macrocycles based on the LAAM concept provide both a peptide targeting region and two independently variable functional regions. In the prototype structure, the commonly known Arg-Gly-Asp (RGD) sequence was used for the targeting region. The functional regions contain a phenyl group, and the linkage was formed via a Ring-Closing Metathesis (RCM) reaction.
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Affiliation(s)
- David S Maxwell
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Duoli Sun
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Zhenghong Peng
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Diana V Martin
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - Basvoju A Bhanu Prasad
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
| | - William G Bornmann
- Department of Experimental Therapeutics, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 77030
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14
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Mignani S, El Kazzouli S, Bousmina MM, Majoral JP. Dendrimer Space Exploration: An Assessment of Dendrimers/Dendritic Scaffolding as Inhibitors of Protein–Protein Interactions, a Potential New Area of Pharmaceutical Development. Chem Rev 2013; 114:1327-42. [DOI: 10.1021/cr400362r] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Serge Mignani
- Laboratoire de Chimie et de
Biochimie Pharmacologiques
et Toxicologiques, CNRS UMR 8601, Université Paris Descartes, Sorbonne Paris Cité, 45 rue des Saints Pères, 75006 Paris, France
| | - Saïd El Kazzouli
- Euro-Mediterranean University of Fez, Fès-Shore, Route de Sidi harazem, Fès, Morocco
| | - Mosto M. Bousmina
- Euro-Mediterranean University of Fez, Fès-Shore, Route de Sidi harazem, Fès, Morocco
- Hassan II Academy of Science and Technology, Avenue Mohammed
VI, 10222 Rabat, Morocco
| | - Jean-Pierre Majoral
- Laboratoire
de Chimie de Coordination, Centre National de la Recherche Scientifique, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
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15
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Pinho E, Grootveld M, Soares G, Henriques M. Cyclodextrin-based hydrogels toward improved wound dressings. Crit Rev Biotechnol 2013; 34:328-37. [DOI: 10.3109/07388551.2013.794413] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Wahlström A, Cukalevski R, Danielsson J, Jarvet J, Onagi H, Rebek J, Linse S, Gräslund A. Specific binding of a β-cyclodextrin dimer to the amyloid β peptide modulates the peptide aggregation process. Biochemistry 2012; 51:4280-9. [PMID: 22554145 DOI: 10.1021/bi300341j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alzheimer's disease involves progressive neuronal loss. Linked to the disease is the amyloid β (Aβ) peptide, a 38-43-amino acid peptide found in extracellular amyloid plaques in the brain. Cyclodextrins are nontoxic, cone-shaped oligosaccharides with a hydrophilic exterior and a hydrophobic cavity making them suitable hosts for aromatic guest molecules in water. β-Cyclodextrin consists of seven α-d-glucopyranoside units and has been shown to reduce the level of fibrillation and neurotoxicity of Aβ. We have studied the interaction between Aβ and a β-cyclodextrin dimer, consisting of two β-cyclodextrin monomers connected by a flexible linker. The β-cyclodextrin monomer has been found to interact with Aβ(1-40) at sites Y10, F19, and/or F20 with a dissociation constant (K(D)) of 3.9 ± 2.0 mM. Here (1)H-(15)N and (1)H-(13)C heteronuclear single-quantum correlation nuclear magnetic resonance (NMR) spectra show that in addition, the β-cyclodextrin monomer and dimer bind to the histidines. NMR translational diffusion experiments reveal the increased affinity of the β-cyclodextrin dimer (apparent K(D) of 1.1 ± 0.5 mM) for Aβ(1-40) compared to that of the β-cyclodextrin monomer. Kinetic aggregation experiments based on thioflavin T fluorescence indicate that the dimer at 0.05-5 mM decreases the lag time of Aβ aggregation, while a concentration of 10 mM increases the lag time. The β-cyclodextrin monomer at a high concentration decreases the lag time of the aggregation. We conclude that cyclodextrin monomers and dimers have specific, modulating effects on the Aβ(1-40) aggregation process. Transmission electron microscopy shows that the regular fibrillar aggregates formed by Aβ(1-40) alone are replaced by a major fraction of amorphous aggregates in the presence of the β-cyclodextrin dimer.
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Affiliation(s)
- Anna Wahlström
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16, SE-106 91 Stockholm, Sweden
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17
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Battle CH, Jayawickramarajah J. Supramolecular Approaches for Inhibition of Protein-Protein and Protein-DNA Interactions. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Prashar D, Cui D, Bandyopadhyay D, Luk YY. Modification of proteins with cyclodextrins prevents aggregation and surface adsorption and increases thermal stability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13091-13096. [PMID: 21902259 DOI: 10.1021/la203271u] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This work describes a general approach for preventing protein aggregation and surface adsorption by modifying proteins with β-cyclodextrins (βCD) via an efficient water-driven ligation. As compared to native unmodified proteins, the cyclodextrin-modified proteins (lysozyme and RNase A) exhibit significant reduction in aggregation, surface adsorption and increase in thermal stability. These results reveal a new chemistry for preventing protein aggregation and surface adsorption that is likely of different mechanisms than that by modifying proteins with poly(ethylene glycol).
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Affiliation(s)
- Deepali Prashar
- Department of Chemistry, Syracuse University, Syracuse, New York 13244, United States
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19
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Filby MH, Muldoon J, Dabb S, Fletcher NC, Ashcroft AE, Wilson AJ. Protein surface recognition using geometrically pure Ru(II) tris(bipyridine) derivatives. Chem Commun (Camb) 2011; 47:559-61. [PMID: 21103575 PMCID: PMC3172587 DOI: 10.1039/c0cc04754f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 11/15/2010] [Indexed: 11/21/2022]
Abstract
This manuscript illustrates that the geometric arrangement of protein-binding groups around a ruthenium(II) core leads to dramatic differences in cytochrome c (cyt c) binding highlighting that it is possible to define synthetic receptors with shape complementarity to protein surfaces.
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Affiliation(s)
- Maria H. Filby
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK. ; Fax: +44 (0)113 3436565; Tel: +44 (0)113 3431409
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - James Muldoon
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK. ; Fax: +44 (0)113 3436565; Tel: +44 (0)113 3431409
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Serin Dabb
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK
| | - Nicholas C. Fletcher
- School of Chemistry and Chemical Engineering, Queen's University Belfast, Belfast, BT9 5AG, UK
| | - Alison E. Ashcroft
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Andrew J. Wilson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK. ; Fax: +44 (0)113 3436565; Tel: +44 (0)113 3431409
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
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20
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Targeting Protein–Protein Interactions and Fragment-Based Drug Discovery. Top Curr Chem (Cham) 2011; 317:145-79. [DOI: 10.1007/128_2011_265] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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21
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Ortiz Mellet C, García Fernández JM, Benito JM. Cyclodextrin-based gene delivery systems. Chem Soc Rev 2010; 40:1586-608. [PMID: 21042619 DOI: 10.1039/c0cs00019a] [Citation(s) in RCA: 294] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cyclodextrin (CD) history has been largely dominated by their unique ability to form inclusion complexes with guests fitting in their hydrophobic cavity. Chemical funcionalization was soon recognized as a powerful mean for improving CD applications in a wide range of fields, including drug delivery, sensing or enzyme mimicking. However, 100 years after their discovery, CDs are still perceived as novel nanoobjects of undeveloped potential. This critical review provides an overview of different strategies to promote interactions between CD conjugates and genetic material by fully exploiting the inside-outside/upper-lower face anisotropy of the CD nanometric platform. Covalent modification, self-assembling and supramolecular ligation can be put forward with the ultimate goal to build artificial viruses for programmed and efficient gene therapy (222 references).
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Affiliation(s)
- Carmen Ortiz Mellet
- Departamento de Química Orgánica, Facultad de Química, Universidad de Sevilla, Apartado 553, E-41071 Sevilla, Spain.
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22
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Muldoon J, Ashcroft AE, Wilson AJ. Selective protein-surface sensing using ruthenium(II) tris(bipyridine) complexes. Chemistry 2010; 16:100-3. [PMID: 19946912 DOI: 10.1002/chem.200902368] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- James Muldoon
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
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23
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24
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Grosdidier S, Totrov M, Fernández-Recio J. Computer applications for prediction of protein-protein interactions and rational drug design. Adv Appl Bioinform Chem 2009; 2:101-23. [PMID: 21918619 PMCID: PMC3169948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
In recent years, protein-protein interactions are becoming the object of increasing attention in many different fields, such as structural biology, molecular biology, systems biology, and drug discovery. From a structural biology perspective, it would be desirable to integrate current efforts into the structural proteomics programs. Given that experimental determination of many protein-protein complex structures is highly challenging, and in the context of current high-performance computational capabilities, different computer tools are being developed to help in this task. Among them, computational docking aims to predict the structure of a protein-protein complex starting from the atomic coordinates of its individual components, and in recent years, a growing number of docking approaches are being reported with increased predictive capabilities. The improvement of speed and accuracy of these docking methods, together with the modeling of the interaction networks that regulate the most critical processes in a living organism, will be essential for computational proteomics. The ultimate goal is the rational design of drugs capable of specifically inhibiting or modifying protein-protein interactions of therapeutic significance. While rational design of protein-protein interaction inhibitors is at its very early stage, the first results are promising.
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Affiliation(s)
- Solène Grosdidier
- Life Sciences Department, Barcelona Supercomputing Center, Barcelona, Spain
| | | | - Juan Fernández-Recio
- Life Sciences Department, Barcelona Supercomputing Center, Barcelona, Spain,Correspondence: Juan Fernandez-Recio, Life Sciences Department, Barcelona Supercomputing Center, C/Jordi Girona 29, 08034 Barcelona, Spain, Tel +34 934137729, Fax +34 934137721, Email
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25
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Wilson AJ. Inhibition of protein-protein interactions using designed molecules. Chem Soc Rev 2009; 38:3289-300. [PMID: 20449049 DOI: 10.1039/b807197g] [Citation(s) in RCA: 198] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although many cellular processes depend upon enzymatic reactions, protein-protein interactions (PPIs) mediate a large number of important regulatory pathways and thus play a central role in disease development. In order to understand and selectively inhibit cellular signalling pathways, there is a pressing need for small molecules that target PPIs, particularly in the context of pharmaceutical development. This tutorial review will introduce the relevance of PPIs to chemical biology and highlight the key challenges in designing inhibitors. Some of the successes using conventional approaches to the identification of small-molecule PPI inhibitors will be highlighted, and also the reasons why these approaches have not always proven successful. Several general approaches tailored to particular protein topologies are emerging for the design of scaffolds that inhibit PPIs-these will form the major content of this review. Finally a summary of the challenges to be faced in developing inhibitors of PPIs into drug leads and how these challenges may differ from those encountered with enzyme-like targets will be given.
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Affiliation(s)
- Andrew J Wilson
- School of Chemistry, University of Leeds, Woodhouse Lane, LS2 9JT, Leeds, UK.
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26
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Jain RK, Tsou LK, Hamilton AD. Combined solid/solution phase synthesis of large surface area scaffolds derived from aminomethyl-benzoates. Tetrahedron Lett 2009; 50:2787-2789. [PMID: 20352130 DOI: 10.1016/j.tetlet.2009.03.153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A set of macrocycles was generated by solid phase synthesis of linear trimers of 5-aminoacyl-3-aminomethyl-benzoates followed by resin cleavage and solution phase macrocyclization. These scaffolds can serve as useful building blocks for molecular recognition studies, especially where differentially functionalized molecular platforms spanning large surface areas are required.
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Affiliation(s)
- Rishi K Jain
- Department of Chemistry, Yale University, New Haven, CT 06520, U.S.A
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27
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Zhao YL, Benítez D, Yoon I, Stoddart J. Inclusion Behavior of β-Cyclodextrin with Bipyridine Molecules: Factors Governing Host-Guest Inclusion Geometries. Chem Asian J 2009; 4:446-56. [DOI: 10.1002/asia.200800373] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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28
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Wang Z, Lu R. Facile direct acylation and acyl migration of β-cyclodextrin on the secondary hydroxyl face. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9511-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Liu Y, Li XY, Guo DS, Chi H. Synthesis ofl-cystine modified cyclodextrin monomers and dimers with primary-sideversussecondary-side and their molecular binding behaviours. Supramol Chem 2008. [DOI: 10.1080/10610270701543415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Y. Liu
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - X.-Y. Li
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - D.-S. Guo
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - H. Chi
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
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30
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Choi SH, Jung HH, Kim JI, Furusho H, Geckeler KE. Supramolecular Nanoscaled Self-Assembly of Bifunctional Cyclodextrin and Trifunctional Melamine Precursors. Macromol Rapid Commun 2008. [DOI: 10.1002/marc.200800225] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Supramolecular structures based on dimeric combinations of cyclodextrin and adamantane via click chemistry. J INCL PHENOM MACRO 2008. [DOI: 10.1007/s10847-008-9457-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Zhao Y, Liu XQ, Gu J, Wang LQ, Zhu HY, Huang R, Wang YF, Yang ZM. Synthesis of novel bis(β-cyclodextrin)s linked with aromatic diamine and their molecular recognition with model substrates. J PHYS ORG CHEM 2008. [DOI: 10.1002/poc.1345] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Abstract
Protein recognition by synthetic molecules is a challenging endeavour, since these materials must bind to a large relatively flat surface domain and recognize a unique distribution of amino acid residues of varying charge, size and shape. The most promising routes involve specific metal coordination, epitope-docking on miniature proteins, aptamer selection, nonnatural peptide isosteres, functionalized platforms, secondary structure mimetics, molecular imprinting and receptors embedded in lipid layers.
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Affiliation(s)
- Thomas Schrader
- University Duisburg-Essen, Department of Chemistry, Universitätsstr. 5, 45117, Essen, Germany
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34
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Wilson AJ, Hong J, Fletcher S, Hamilton AD. Recognition of solvent exposed protein surfaces using anthracene derived receptors. Org Biomol Chem 2007; 5:276-85. [PMID: 17205171 DOI: 10.1039/b612975g] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new class of receptor is described that can selectively bind to the solvent exposed surface of proteins such as cytochrome c and lysozyme with low micromolar affinity over cytochrome c551, alpha-lactalbumin, myoglobin and RNase A, under physiologically relevant conditions (5 mM phosphate, pH 7.4). The use of anthracene as a hydrophobic scaffold allows the receptor to act as a selective chemosensor via fluorescence quenching or FRET. The study reveals that co-operative electrostatic interactions over a large surface area dominate binding. Further investigations reveal that the receptor binds to the solvent exposed heme edge of cytochrome c inhibiting its reaction with small reducing agents and validating the strategy for the disruption of protein function.
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Affiliation(s)
- Andrew J Wilson
- Department of Chemistry, PO Box 208107, 225 Prospect Street, Yale University, New Haven, CT 06520-8107, USA
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35
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Yin H, Hamilton AD. Strategies for targeting protein-protein interactions with synthetic agents. Angew Chem Int Ed Engl 2006; 44:4130-63. [PMID: 15954154 DOI: 10.1002/anie.200461786] [Citation(s) in RCA: 375] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The development of small-molecule modulators of protein-protein interactions is a formidable goal, albeit one that possesses significant potential for the discovery of novel therapeutics. Despite the daunting challenges, a variety of examples exists for the inhibition of two large protein partners with low-molecular-weight ligands. This review discusses the strategies for targeting protein-protein interactions and the state of the art in the rational design of molecules that mimic the structures and functions of their natural targets.
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Affiliation(s)
- Hang Yin
- Yale University, New Haven, CT, USA
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36
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Affiliation(s)
- Rochelle R. Arvizo
- a Department of Chemistry , University of Massachusetts , Amherst, MA, 01003, USA
| | - Ayush Verma
- a Department of Chemistry , University of Massachusetts , Amherst, MA, 01003, USA
| | - Vincent M. Rotello
- a Department of Chemistry , University of Massachusetts , Amherst, MA, 01003, USA
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37
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Worrall JWE, Verma A, Yan H, Rotello VM. "Cleaning" of nanoparticle inhibitors via proteolysis of adsorbed proteins. Chem Commun (Camb) 2006:2338-40. [PMID: 16733572 DOI: 10.1039/b517421j] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cytochrome c adsorbed to anionic nanoparticles is selectively proteolyzed by trypsin, providing a mechanism for the catalytic degradation of proteins.
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Affiliation(s)
- Joseph W E Worrall
- Department of Chemistry, University of Massachusetts at Amherst, Amherst, MA 01003, USA
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38
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Fletcher S, Hamilton AD. Targeting protein-protein interactions by rational design: mimicry of protein surfaces. J R Soc Interface 2006; 3:215-33. [PMID: 16849232 PMCID: PMC1578744 DOI: 10.1098/rsif.2006.0115] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2006] [Accepted: 01/27/2006] [Indexed: 11/12/2022] Open
Abstract
Protein-protein interactions play key roles in a range of biological processes, and are therefore important targets for the design of novel therapeutics. Unlike in the design of enzyme active site inhibitors, the disruption of protein-protein interactions is far more challenging, due to such factors as the large interfacial areas involved and the relatively flat and featureless topologies of these surfaces. Nevertheless, in spite of such challenges, there has been considerable progress in recent years. In this review, we discuss this progress in the context of mimicry of protein surfaces: targeting protein-protein interactions by rational design.
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Affiliation(s)
| | - Andrew D Hamilton
- Department of Chemistry, Yale UniversityPO Box 208107, New Haven, CT 06520-8107, USA
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39
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Circular dichroism and fluorescence spectroscopy studies of the effect of cyclodextrins on the thermal stability of chicken egg white lysozyme in aqueous solution. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.01.024] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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40
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Yin H, Hamilton AD. Strategien zur Modulation von Protein-Protein-Wechselwirkungen mit synthetischen Substanzen. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461786] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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41
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Song Y, Chen Y, Liu Y. Switchable fluorescence behaviors of pyronine Y at different pH values upon complexation with biquinolino-bridged bis(β-cyclodextrin). J Photochem Photobiol A Chem 2005. [DOI: 10.1016/j.jphotochem.2005.04.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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42
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Liu Y, Yang YW, Chen Y, Ding F. Efficient fluorescent sensors of oligopeptides by dithiobis(2-benzoylamide)-bridged bis(β-cyclodextrin)s: structure in solution, binding behavior, and thermodynamic origin. Bioorg Med Chem 2005; 13:963-71. [PMID: 15670904 DOI: 10.1016/j.bmc.2004.11.042] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2004] [Revised: 11/22/2004] [Accepted: 11/23/2004] [Indexed: 11/15/2022]
Abstract
Two 6,6'-bis(beta-cyclodextrin)s linked by 2,2'-dithiobis[2-(benzoylamino)ethyleneamino] and 2,2'-dithiobis[2-(benzoylamino)diethylenetriamino] bridges (1 and 2) have been synthesized as cooperative multipoint recognition receptor models for non-aromatic oligopeptides. Their structures in solution and inclusion complexation mechanism are comprehensively investigated by means of circular dichroism, 2D NMR spectra and temperature-dependent fluorescence titrations. The results show that the cooperative 'host-linker-guest' binding mode and the extensive desolvation effect jointly contribute to the guest-induced fluorescence enhancement of bis(beta-cyclodextrin)s. Further examinations on the binding behavior of hosts 1-2 with a series of di- and tri-peptides demonstrate that bis(beta-cyclodextrin) 1 can recognize not only the size/shape of oligopeptides but also the dipeptide sequence, giving an exciting residue selectivity up to 37.5 for Gly-Gly-Gly/Glu-Glu pair and a high sequence selectivity up to 5.0 for Gly-Leu/Leu-Gly pair. These fairly good selectivities are discussed from the viewpoint of cooperative binding, multiple recognition and induced-fit interactions between host and guest.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, PR China.
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43
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Abstract
Cyclodextrins are cyclic oligomers of glucose that can form water-soluble inclusion complexes with small molecules and portions of large compounds. These biocompatible, cyclic oligosaccharides do not elicit immune responses and have low toxicities in animals and humans. Cyclodextrins are used in pharmaceutical applications for numerous purposes, including improving the bioavailability of drugs. Current cyclodextrin-based therapeutics are described and possible future applications discussed. Cyclodextrin-containing polymers are reviewed and their use in drug delivery presented. Of specific interest is the use of cyclodextrin-containing polymers to provide unique capabilities for the delivery of nucleic acids.
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Affiliation(s)
- Mark E Davis
- Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA.
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44
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Liu Y, Yang YW, Yang EC, Guan XD. Molecular Recognition Thermodynamics and Structural Elucidation of Interactions between Steroids and Bridged Bis(β-cyclodextrin)s. J Org Chem 2004; 69:6590-602. [PMID: 15387580 DOI: 10.1021/jo049143k] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of bridged bis(beta-cyclodextrin(CD))s (2-7) were synthesized, i.e., bridged bis(beta-CD)s 2 and 3 bearing binaphthyl or biquinoline tethers and bridged bis(beta-CD)s 4-7 possessing dithiobis(benzoyl) tether, and their complex stability constants (KS), enthalpy (DeltaH degrees), and entropy changes (DeltaS degrees) for the 1:2 inclusion complexation with representative steroids, deoxycholate, cholate, glycocholate, and taurocholate, have been determined in an aqueous phosphate buffer solution of pH 7.20 at 298.15 K by means of titration microcalorimetry. The original conformations of bridged bis(beta-cyclodextrin)s were investigated by circular dichroism and 1H ROESY spectroscopy. Structures of the inclusion complexes between steroids and bridged bis(beta-CD)s in solution were elucidated by 2D NMR experiments, indicating that anionic groups of two steroid molecules penetrate, respectively, into the two hydrophobic CD cavities in one 6,6'-bridged bis(beta-CD) molecule from the secondary rim to give a 1:2 binding mode upon inclusion complexation. The results obtained from titration microcalorimetry and 2D NMR experiments jointly demonstrate that bridged bis(beta-CD)s 2, 3 and 5-7 tethered by protonated amino group possessing different substituted groups can enhance not only the molecular binding ability toward steroids by electrostatic interaction but also molecular selectivity. Thermodynamically, the resulting 1:2 bis(beta-CD)-steroid complexes are formed by an enthalpy-driven process, accompanied by smaller entropy loss. The increased complex stability mainly results from enthalpy gain, accompanied by large conformational change and extensive desolvation effects for the 1:2 inclusion complexation between bis(beta-CD)s and steroids.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
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45
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Liu Y, Li L, Zhang HY, Liang P, Wang H. Inclusion complexation behavior of dyestuff guest molecules by a bridged bis(cyclomaltoheptaose)[bis(beta-cyclodextrin)] with a pyromellitic acid diamide tether. Carbohydr Res 2003; 338:1751-7. [PMID: 12892942 DOI: 10.1016/s0008-6215(03)00268-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A novel bridged bis(beta-cyclodextrin) with a pyromellitic acid 2,5-diamide tether (2) has been synthesized by reaction of 6(I)-(2-aminoethyleneamino)-6-deoxycyclomaltoheptaose [mono 6-(2-aminoethyleneamino)-6-deoxy-beta-cyclodextrin] with 1,2,4,5-benzenetetracarboxylic dianhydride. Its inclusion complexation behavior with some representative dyestuffs, i.e., Acridine Red (AR), Rhodamine B (RhB), Neutral Red (NR), Brilliant Green (BG), was studied by using UV-absorption, fluorescence, and 2D NMR spectroscopy. Fluorescence titrations have been performed at 25 degrees C in pH 7.2 buffer solution to calculate the binding constants of resulting complexes. These results obtained indicated that bis(beta-cyclodextrin) 2 exhibits the strongly enhanced binding ability with all dye molecules examined compared with natural cyclodextrins. The binding modes of 2 with dye molecules have been deduced by 2D NMR experiments to establish the correlations between molecular conformations and binding constants of inclusion complexation. It is found that the improved binding ability and molecular selectivity of 2 could be attributed to double-cavity cooperative inclusion interaction and the size/shape matching between the host and guest.
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Affiliation(s)
- Yu Liu
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Weijin Road 94, Tianjin 300071, PR China.
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46
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Yuan DQ, Immel S, Koga K, Yamaguchi M, Fujita K. The first successful crystallographic characterization of a cyclodextrin dimer: efficient synthesis and molecular geometry of a doubly sulfur-bridged beta-cyclodextrin. Chemistry 2003; 9:3501-6. [PMID: 12898677 DOI: 10.1002/chem.200204310] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Beta-cyclodextrin is transannularly disulfonylated at the 6(A)- and 6(B)-positions, and then converted to the corresponding 6(A),6(B)-diiodide and 6(A),6(B)-dithiol. Cross-coupling of the latter two species yields a single head-to-head-coupled beta-cyclodextrin dimer 5 with two sulfur linkers at adjacent 6-methylene carbons. NMR and X-ray analysis revealed the trans-type ("aversive") linkage of both beta-cyclodextrin units. In the solid-state structure of 5.5 MeOH.23 H(2)O, the undistorted cyclodextrin macrocycles feature almost parallel ring planes pointing away from each other, leaving 5 with a "handcuff-like" appearance of approximate C(2) symmetry. This work represents the first successful crystallographic study on a cyclodextrin dimer.
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Affiliation(s)
- De-Qi Yuan
- Faculty of Pharmaceutical Sciences, Nagasaki University Bunkyo-machi, Nagasaki 852-8521, Japan
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47
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Abstract
beta-cyclodextrin-based receptors were synthesized and tested for their ability to induce a helical fold in peptides bearing hydrophobic amino acid residues in the i, i+11- or i, i+14-positions. Circular dichroism experiments revealed that a dimeric beta-cylodextrin receptor synthesized from a [1,1'-biphenyl]-4,4'-dithiol core demonstrated an ability to fold a designed peptide bearing the artificial amino acid L-p-t-butylphenylalanine in the i, i+11-positions, while other dimeric and monomeric receptors failed to do so. Titration studies were performed using both circular dichroism and calorimetry, the analysis of which yielded an apparent K(a) on the order of 10(4)-10(5) M(-1). However, no evidence could be obtained for helical folding with a peptide carrying tryptophan residues in place of the p-t-butylphenylalanine units. Our studies suggest that receptors of this type may be useful in molecular recognition of hydrophobic, already alpha-helical peptides in aqueous solution.
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Affiliation(s)
- David Wilson
- Department of Chemistry, Columbia University, New York, NY 10027, USA
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48
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Liu Y, Song Y, Wang H, Zhang HY, Wada T, Inoue Y. Selective binding of steroids by 2,2'-biquinoline-4,4'-dicarboxamide-bridged bis(beta-cyclodextrin): fluorescence enhancement by guest inclusion. J Org Chem 2003; 68:3687-90. [PMID: 12713379 DOI: 10.1021/jo026908k] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel bis(beta-cyclodextrin) was synthesized, and its binding behavior with steroids was investigated to demonstrate that the cooperative co-inclusion of guest and tether by two cyclodextrin moieties is operative to afford the highest molecular selectivity of up to 3.6 for deoxycholate over taurocholate.
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Affiliation(s)
- Yu Liu
- Department of Chemistry and State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China.
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49
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Hishiya T, Asanuma H, Komiyama M. Molecularly Imprinted Cyclodextrin Polymers as Stationary Phases of High Performance Liquid Chromatography. Polym J 2003. [DOI: 10.1295/polymj.35.440] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Bowman MJ, Chmielewski J. Novel strategies for targeting the dimerization interface of HIV protease with cross-linked interfacial peptides. Biopolymers 2002; 66:126-33. [PMID: 12325162 DOI: 10.1002/bip.10232] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
As the prevalence of AIDS continues to grow, and current therapeutic agents begin to lose efficacy, the need for alternative treatments to combat HIV has become significantly greater. Targeting the highly conserved dimerization interface of HIV protease (PR) with interfacial peptides has been shown to reduce the activity of the enzyme due to generation of inactive monomers. The potency of these peptide-based inhibitors has been dramatically increased by cross-linking the interfacial sequences derived from HIV PR. This review focuses on a variety of strategies to develop potent, low-molecular-weight dimerization inhibitors of HIV PR.
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Affiliation(s)
- Michael J Bowman
- Department of Chemistry, Purdue University, West Lafayette, IN 47907, USA
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