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Sapra R, Gupta M, Khare K, Chowdhury PK, Haridas V. Fluorescence by self-assembly: autofluorescent peptide vesicles and fibers. Analyst 2023; 148:973-984. [PMID: 36756978 DOI: 10.1039/d3an00124e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A series of oxidized cysteinyl peptides ([P-Cys-X-OMe]2; P = Boc or H; X = Trp or Glu) showed vesicular and fibrillar assemblies. The anatomy of the self-assembled vesicles from the water-soluble cystine peptide [Cys-Trp-OMe]2 (1a) has been investigated by using various fluorescent probes such as ammonium 8-anilinonaphthalene-1-sulfonate, Nile Red and pyrene. The morphological characterization was carried out by fluorescence lifetime imaging microscopy (FLIM) and super resolution-structured illumination microscopy (SR-SIM) utilizing the autofluorescence of the vesicles stemming from the self-assembly. The self-assembled structures are also observed in solution as evident from the quantitative phase images obtained using a dual-mode digital holographic microscope (DHM) system. Present investigations show that the self-assembly is enthalpy- and entropy-driven in the aqueous medium. Based on the CD spectral studies, we proposed that 1a organizes into vesicles through the sequestration of indole units. We observed that the solutions of dipeptides 1a-b exhibit autofluorescence in the blue region upon excitation at a wavelength >350 nm. Detailed spectroscopic studies on the peptides lacking tryptophan 2a-b unequivocally showed that the autofluorescence stems exclusively from peptide aggregation. Our experimental results with appropriate controls revealed that the clustering of carbonyl chromophores is central to autofluorescence. Autofluorescence was also used to probe the vesicle formation without using any external fluorescent probe. To the best of our knowledge, this is the first report on autofluorescent vesicles formed by the spontaneous association of dipeptides. We also found that the vesicles formed by 1a can act as a host for guests like C60. The biocompatibility and biodegradability of these peptides along with the autofluorescent nature and guest binding ability of peptide-based vesicles offer numerous applications in the biomedical area.
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Affiliation(s)
- Rachit Sapra
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Monika Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - Kedar Khare
- Optics and Photonics Centre, Indian Institute of Technology Delhi, New Delhi-110016, India
| | - Pramit K Chowdhury
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
| | - V Haridas
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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2
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Doubly chiral pseudopeptidic macrobicyclic molecular cages: Water-assisted dynamic covalent self-assembly and chiral self-sorting. Chem 2022. [DOI: 10.1016/j.chempr.2022.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Begato F, Penasa R, Licini G, Zonta C. Chiroptical Enhancement of Chiral Dicarboxylic Acids from Confinement in a Stereodynamic Supramolecular Cage. ACS Sens 2022; 7:1390-1394. [PMID: 35472260 PMCID: PMC9150167 DOI: 10.1021/acssensors.2c00038] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
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The fundamental implications
that chirality has in science and
technology require continuous efforts for the development of fast,
economic, and reliable quantitative methods for enantiopurity assessment.
Among the different analytical approaches, chiroptical techniques
in combination with supramolecular methodologies have shown promising
results in terms of both costs and time analysis. In this article,
a tris(2-pyridylmethyl)amines (TPMA)-based supramolecular
cage is able to amplify the circular dichroism (CD) signal of a series
of chiral dicarboxylic acids also in the presence of a complex mixture.
This feature has been used to quantify tartaric acid in wines and
to discriminate different matrixes using principal component analysis
(PCA) of the raw CD data.
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Affiliation(s)
- Federico Begato
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Roberto Penasa
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Giulia Licini
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
| | - Cristiano Zonta
- Department of Chemical Sciences, University of Padova, via Marzolo 1, 35131 Padova, Italy
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Sors-Vendrell A, Ortiz A, Meneses D, Alfonso I, Solà J, Jimeno C. A Degenerate Metal-Templated Catalytic System with Redundant Functional Groups for the Asymmetric Aldol Reaction. J Org Chem 2022; 87:7509-7513. [PMID: 35583468 PMCID: PMC9171831 DOI: 10.1021/acs.joc.2c00414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
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A degenerate zinc-templated
catalytic system containing two bipyridine
ligands with redundant functional groups for either enamine or hydrogen
bond formation was applied to the asymmetric aldol reaction. This
concept led to both a higher probability of reaction and rate acceleration.
Thus, the catalyst loading could be decreased to a remarkable 2 mol
% in what we think is a general approach.
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Affiliation(s)
- Alba Sors-Vendrell
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
| | - Albert Ortiz
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
| | - Diego Meneses
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
| | - Ignacio Alfonso
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
| | - Jordi Solà
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
| | - Ciril Jimeno
- Department of Biological Chemistry, Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18-26, Barcelona, Barcelona E08034, Spain
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5
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Glionna C, Kumar V, Le Saux G, Pramanik B, Wagner N, Cohen-Luria R, Ashkenasy G, Ashkenasy N. Dynamic Surface Layer Coiled Coil Proteins Processing Analog-to-Digital Information. J Am Chem Soc 2021; 143:17441-17451. [PMID: 34652148 DOI: 10.1021/jacs.1c06356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Surface layer proteins perform multiple functions in prokaryotic cells, including cellular defense, cell-shape maintenance, and regulation of import and export of materials. However, mimicking the complex and dynamic behavior of such two-dimensional biochemical systems is challenging, and hence research has so far focused mainly on the design and manipulation of the structure and functionality of protein assemblies in solution. Motivated by the new opportunities that dynamic surface layer proteins may offer for modern technology, we herein demonstrate that immobilization of coiled coil proteins onto an inorganic surface facilitates complex behavior, manifested by reversible chemical reactions that can be rapidly monitored as digital surface readouts. Using multiple chemical triggers as inputs and several surface characteristics as outputs, we can realize reversible switching and logic gate operations that are read in parallel. Moreover, using the same coiled coil protein monolayers for derivatization of nanopores drilled into silicon nitride membranes facilitates control over ion and mass transport through the pores, thereby expanding the applicability of the dynamic coiled coil system for contemporary stochastic biosensing applications.
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Affiliation(s)
- Chiara Glionna
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Vinod Kumar
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Bapan Pramanik
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nathaniel Wagner
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Rivka Cohen-Luria
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Gonen Ashkenasy
- Department of Chemistry, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.,Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nurit Ashkenasy
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.,Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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6
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Kahana A, Lancet D. Self-reproducing catalytic micelles as nanoscopic protocell precursors. Nat Rev Chem 2021; 5:870-878. [PMID: 37117387 DOI: 10.1038/s41570-021-00329-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/03/2021] [Indexed: 12/31/2022]
Abstract
Protocells at life's origin are often conceived as bilayer-enclosed precursors of life, whose self-reproduction rests on the early advent of replicating catalytic biopolymers. This Perspective describes an alternative scenario, wherein reproducing nanoscopic lipid micelles with catalytic capabilities were forerunners of biopolymer-containing protocells. This postulate gains considerable support from experiments describing micellar catalysis and autocatalytic proliferation, and, more recently, from reports on cross-catalysis in mixed micelles that lead to life-like steady-state dynamics. Such results, along with evidence for micellar prebiotic compatibility, synergize with predictions of our chemically stringent computer-simulated model, illustrating how mutually catalytic lipid networks may enable micellar compositional reproduction that could underlie primal selection and evolution. Finally, we highlight studies on how endogenously catalysed lipid modifications could guide further protocellular complexification, including micelle to vesicle transition and monomer to biopolymer progression. These portrayals substantiate the possibility that protocellular evolution could have been seeded by pre-RNA lipid assemblies.
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7
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Laroui N, Coste M, Su D, Ali LMA, Bessin Y, Barboiu M, Gary-Bobo M, Bettache N, Ulrich S. Cell-Selective siRNA Delivery Using Glycosylated Dynamic Covalent Polymers Self-Assembled In Situ by RNA Templating. Angew Chem Int Ed Engl 2021; 60:5783-5787. [PMID: 33289957 DOI: 10.1002/anie.202014066] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/27/2020] [Indexed: 12/25/2022]
Abstract
Dynamic covalent libraries enable exploring complex chemical systems from which bioactive assemblies can adaptively emerge through template effects. In this work, we studied dynamic covalent libraries made of complementary bifunctional cationic peptides, yielding a diversity of species from macrocycles to polymers. Although polymers are typically expressed only at high concentration, we found that siRNA acts as a template in the formation of dynamic covalent polymers at low concentration in a process guided by electrostatic binding. Using a glycosylated building block, we were able to show that this templated polymerization further translates into the multivalent presentation of carbohydrate ligands, which subsequently promotes cell uptake and even cell-selective siRNA delivery.
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Affiliation(s)
- Nabila Laroui
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
| | - Maëva Coste
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
| | - Dandan Su
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France.,Institut Européen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, CC 047, 34095, Montpellier, France
| | - Lamiaa M A Ali
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France.,Department of Biochemistry, Medical Research Institute, University of Alexandria, 21561, Alexandria, Egypt
| | - Yannick Bessin
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
| | - Mihail Barboiu
- Institut Européen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugène Bataillon, CC 047, 34095, Montpellier, France
| | - Magali Gary-Bobo
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
| | - Nadir Bettache
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
| | - Sébastien Ulrich
- Institut des Biomolécules Max Mousseron (IBMM), CNRS, Université de Montpellier, ENSCM, Montpellier, France
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8
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Laroui N, Coste M, Su D, Ali LMA, Bessin Y, Barboiu M, Gary‐Bobo M, Bettache N, Ulrich S. Cell‐Selective siRNA Delivery Using Glycosylated Dynamic Covalent Polymers Self‐Assembled In Situ by RNA Templating. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014066] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Nabila Laroui
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
| | - Maëva Coste
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
| | - Dandan Su
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
- Institut Européen des Membranes Adaptive Supramolecular Nanosystems Group Université de Montpellier ENSCM CNRS Place Eugène Bataillon, CC 047 34095 Montpellier France
| | - Lamiaa M. A. Ali
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
- Department of Biochemistry Medical Research Institute University of Alexandria 21561 Alexandria Egypt
| | - Yannick Bessin
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
| | - Mihail Barboiu
- Institut Européen des Membranes Adaptive Supramolecular Nanosystems Group Université de Montpellier ENSCM CNRS Place Eugène Bataillon, CC 047 34095 Montpellier France
| | - Magali Gary‐Bobo
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
| | - Nadir Bettache
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
| | - Sébastien Ulrich
- Institut des Biomolécules Max Mousseron (IBMM) CNRS Université de Montpellier ENSCM Montpellier France
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