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Brandan MA, Pérez HA, Disalvo A, de Los A Frías M. Interaction of L-phenylalanine with carbonyl groups in mixed lipid membranes. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024; 1866:184328. [PMID: 38688404 DOI: 10.1016/j.bbamem.2024.184328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 04/14/2024] [Accepted: 04/23/2024] [Indexed: 05/02/2024]
Abstract
The interaction of L-Phe with the membrane components, i.e., lipids and proteins, has been discussed in the current literature due to the interest to understand the effect of single amino acids in relation to the formation of amyloid aggregates. In the present work, it is shown that L-Phe interacts with 9:1 DMPC (1,2-dimyristoyl-sn-glycero-3 phosphocholine)/DPPC (1,2-dipalmitoyl-sn-glycero-3 phosphocholine) mixtures but not in the 1:9 one. An important observation is that the interaction disappears when DPPC is replaced by diether PC (2-di-O-hexadecyl-sn-glycero-3-phosphocholine) a lipid lacking carbonyl groups (CO). This denotes that CO groups may interact specifically with L-Phe in accordance with the appearance of a new peak observed by Infrared spectroscopy (FTIR-ATR). The interaction of L-Phe affects the compressibility pattern of the 9:1 DMPC/DPPC mixture which is congruent with the changes observed by Raman spectra. The specific interaction of L-Phe with CO, propagates to phosphate and choline groups in this particular mixture as analyzed by FTIR-ATR spectroscopy and is absent when DMPC is dopped with diether PC.
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Affiliation(s)
- María A Brandan
- Laboratory of Biointerphases and Biomimetic Systems, Applied Biophysics and Food Research Center (Centro de Investigaciones en Biofísica Aplicada y Alimentos, CIBAAL, National University of Santiago del Estero and CONICET), RN 9 - Km 1125, 4206 Santiago del Estero, Argentina
| | - Hugo A Pérez
- Laboratory of Biointerphases and Biomimetic Systems, Applied Biophysics and Food Research Center (Centro de Investigaciones en Biofísica Aplicada y Alimentos, CIBAAL, National University of Santiago del Estero and CONICET), RN 9 - Km 1125, 4206 Santiago del Estero, Argentina
| | - Aníbal Disalvo
- Laboratory of Biointerphases and Biomimetic Systems, Applied Biophysics and Food Research Center (Centro de Investigaciones en Biofísica Aplicada y Alimentos, CIBAAL, National University of Santiago del Estero and CONICET), RN 9 - Km 1125, 4206 Santiago del Estero, Argentina
| | - María de Los A Frías
- Laboratory of Biointerphases and Biomimetic Systems, Applied Biophysics and Food Research Center (Centro de Investigaciones en Biofísica Aplicada y Alimentos, CIBAAL, National University of Santiago del Estero and CONICET), RN 9 - Km 1125, 4206 Santiago del Estero, Argentina.
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2
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Gunwant V, Gahtori P, Varanasi SR, Pandey R. Protein-Mediated Changes in Membrane Fluidity and Ordering: Insights into the Molecular Mechanism and Implications for Cellular Function. J Phys Chem Lett 2024; 15:4408-4415. [PMID: 38625684 DOI: 10.1021/acs.jpclett.3c03627] [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: 04/17/2024]
Abstract
Probing protein-membrane interactions is vital for understanding biological functionality for various applications such as drug development, targeted drug delivery, and creation of functional biomaterials for medical and industrial purposes. In this study, we have investigated interaction of Human Serum Albumin (HSA) with two different lipids, dipalmitoylphosphatidylglycerol (dDPPG) and dipalmitoylphosphatidylcholine (dDPPC), using Vibrational Sum Frequency Generation spectroscopy at different membrane fluidity values. In the liquid-expanded (LE) state of the lipid, HSA (at pH 3.5) deeply intercalated lipid chains through a combination of electrostatic and hydrophobic interactions, which resulted in more ordering of the lipid chains. However, in the liquid-condensed (LC) state, protein intercalation is decreased due to tighter lipid packing. Moreover, our findings revealed distinct differences in HSA's interaction with dDPPG and dDPPC lipids. The interaction with dDPPC remained relatively weak compared to dDPPG. These results shed light on the significance of protein mediated changes in lipid characteristics, which hold considerable implications for understanding membrane protein behavior, lipid-mediated cellular processes, and lipid-based biomaterial design.
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Affiliation(s)
- Vineet Gunwant
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Preeti Gahtori
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
| | - Srinivasa Rao Varanasi
- Department of Physics, Sultan Qaboos University, P.O. Box 36, Al-Khoud 123, Muscat, Oman
| | - Ravindra Pandey
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
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3
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Nandi S, Sarkar N. Interactions between Lipid Vesicle Membranes and Single Amino Acid Fibrils: Probable Origin of Specific Neurological Disorders. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1971-1987. [PMID: 38240221 DOI: 10.1021/acs.langmuir.3c02429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Amyloid fibrils are known to be responsible for several neurological disorders, like Alzheimer's disease (AD), Parkinson's disease (PD), etc. For decades, mostly proteins and peptide-based amyloid fibrils have been focused on, and the topic has acknowledged the rise, development, understanding of, and controversy, as well. However, the single amino acid based amyloid fibrils, responsible for several disorders, such as phenylketonuria, tyrosenimia type II, hypermethioninemia, etc., have gotten scientific attention lately. To understand the molecular level pathogenesis of such disorders originated due to the accumulation of single amino acid-based amyloid fibrils, interaction of these fibrils with phospholipid vesicle membranes is found to be an excellent cell-free in vitro setup. Based on such an in vitro setup, these fibrils show a generic mechanism of membrane insertion driven by electrostatic and hydrophobic effects inside the membrane that reduces the integral rigidity of the membrane. Alteration of such fundamental properties of the membrane, therefore, might be referred to as one of the prime pathological factors for the development of these neurological disorders. Hence, such interactions must be investigated in cellular and intracellular compartments to design suitable therapeutic modulators against fibrils.
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Affiliation(s)
- Sourav Nandi
- Yale School of Medicine, Yale University, New Haven, Connecticut 06510, United States
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology, Kharagpur, 721302, West Bengal, India
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4
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Deal AM. Infrared Reflection Absorption Spectroscopy (IRRAS) of Water-Soluble Surfactants: Is it Surface-Specific? APPLIED SPECTROSCOPY 2023; 77:1280-1288. [PMID: 37743797 DOI: 10.1177/00037028231200903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Infrared reflection absorption spectroscopy (IRRAS) is commonly used to study the structure and chemistry of molecules residing at surfaces, including water surfaces, which has far-reaching applications including atmospheric chemistry and food science. However, there is some debate regarding the surface-specificity of IRRAS when examining soluble surfactants on aqueous solutions, and there is some evidence that the surface-specificity may differ between IRRAS of ionic surfactants and soluble organic acids. This paper presents infrared reflection absorption (IRRA) spectra of soluble organic acids underneath monolayers of insoluble surfactants, where the contributions from the insoluble surfactants are subtracted from the spectra to capture "subsurface effects". These "subsurface" spectra demonstrate that IRRA spectra of soluble organic acids are surface specific, and this observation is supported by a simplified model for reflections from "subsurface" layers. Finally, the observations presented here are compared to literature observations regarding the surface-specificity of IRRAS when studying ionic surfactants. Overall, this work demonstrates the utility of IRRAS for studying the structures and chemistry of soluble organic acids at aqueous surfaces.
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Affiliation(s)
- Alexandra M Deal
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, USA
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5
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Duncan KM, Trousdale RC, Gonzales CN, Steel WH, Walker RA. l-Phenylalanine Partitioning Mechanisms in Model Biological Membranes. J Phys Chem B 2023. [PMID: 37315336 DOI: 10.1021/acs.jpcb.2c08582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Time-resolved fluorescence spectroscopy in combination with differential scanning calorimetry (DSC) was used to study the chemical interactions that occur when l-phenylalanine is introduced to solutions containing phosphatidylcholine vesicles. Studies reported in this work address open questions about l-Phe's affinity for lipid vesicle bilayers, the effects of l-Phe partitioning on bilayer properties, l-Phe's solvation within a lipid bilayer, and the amount of l-Phe within that local solvation environment. DSC data show that l-Phe reduces the amount of heat necessary to melt saturated phosphatidylcholine bilayers from their gel to liquid-crystalline state but does not change the transition temperature (Tgel-lc). Time-resolved emission shows only a single l-Phe lifetime at low temperatures corresponding to l-Phe remaining solvated in aqueous solution. At temperatures close to Tgel-lc, a second, shorter lifetime appears that is assigned to l-Phe already embedded within the membrane that becomes hydrated as water starts to permeate the lipid bilayer. This new lifetime is attributed to a conformationally restricted rotamer in the bilayer's polar headgroup region and accounts for up to 30% of the emission amplitude. Results reported for dipalmitoylphosphatidylcholine (DPPC, 16:0) lipid vesicles prove to be general, with similar effects observed for dimyristoylphosphatidylcholine (DMPC, 14:0) and distearoylphosphatidylcholine (DSPC, 18:0) vesicles. Taken together, these results create a complete and compelling picture of how l-Phe associates with model biological membranes. Furthermore, this approach to examining amino acid partitioning into membranes and the resulting solvation forces points to new strategies for studying the structure and chemistry of membrane-soluble peptides and selected membrane proteins.
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Affiliation(s)
- Katelyn M Duncan
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Rhys C Trousdale
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
| | - Cristina N Gonzales
- Department of Chemistry, Reed College, Portland, Oregon 97202, United States
| | - William H Steel
- Department of Chemistry, York College of Pennsylvania, York, Pennsylvania 17403, United States
| | - Robert A Walker
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, United States
- Montana Materials Science Program, Montana State University, Bozeman, Montana 59717, United States
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T Cell-Association of Carboxy-Terminal Dendrimers with Different Bound Numbers of Phenylalanine and Their Application to Drug Delivery. Pharmaceutics 2023; 15:pharmaceutics15030888. [PMID: 36986747 PMCID: PMC10052534 DOI: 10.3390/pharmaceutics15030888] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 03/12/2023] Open
Abstract
T cells play important roles in various immune reactions, and their activation is necessary for cancer immunotherapy. Previously, we showed that polyamidoamine (PAMAM) dendrimers modified with 1,2-cyclohexanedicarboxylic acid (CHex) and phenylalanine (Phe) underwent effective uptake by various immune cells, including T cells and their subsets. In this study, we synthesized various carboxy-terminal dendrimers modified with different bound numbers of Phe and investigated the association of these dendrimers with T cells to evaluate the influence of terminal Phe density. Carboxy-terminal dendrimers conjugating Phe at more than half of the termini exhibited a higher association with T cells and other immune cells. The carboxy-terminal Phe-modified dendrimers at 75% Phe density tended to exhibit the highest association with T cells and other immune cells, which was related to their association with liposomes. A model drug, protoporphyrin IX (PpIX), was encapsulated into carboxy-terminal Phe-modified dendrimers, which were then used for drug delivery into T cells. Our results suggest the carboxy-terminal Phe-modified dendrimers are useful for delivery into T cells.
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7
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Machado AC, Cipriano da Silva TR, Raminelli C, Caseli L. Unsaturation pattern of phosphatidylglycerols modulating the interaction of lysicamine with cells membrane models at the air-water interface. Colloids Surf B Biointerfaces 2023; 222:113045. [PMID: 36446237 DOI: 10.1016/j.colsurfb.2022.113045] [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: 08/16/2022] [Revised: 10/18/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022]
Abstract
Lysicamine, an alkaloid with tumorigenic activity, was incorporated in cell membrane models made of lipid Langmuir monolayers. Dipalmitoylphosphocholine (DPPC), dioleoylphosphocholine (DOPC), and palmitoyloleoylcholine (POPC) represented non-tumorigenic cell membranes, and dipalmitoylphosphoserine (DPPS), dioleoylphosphoserine (DOPS), and palmitoyloleoylserine (POPS), tumorigenic ones. The monolayers were characterized by tensiometry, infrared spectroscopy, and Brewster Angle Microscopy (BAM). No significant shifts of the isotherms were observed for the saturated lipids (DPPC and DPPS), while for the others (DOPC, POPS, DOPS, and POPS), more significant changes were observed not only in the compression isotherms but also in the surface pressure-time curve for pre-compressed monolayers. The molecular organization, as well as the morphology of the drug-lipid monolayers, could be inferred with infrared spectroscopy and BAM. While the first revealed that the alkyl chain ordering changed upon lysicamine incorporation, the second showed how the drug could distinctly change the state of aggregation of molecular domains at the air-water interface. In conclusion, lysicamine could interact distinctly with each lipid at the air-water interface, showing the dependence not only on the lipid polar groups but also on the level of unsaturation of the alkyl chains.
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Affiliation(s)
- André Campos Machado
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil
| | | | - Cristiano Raminelli
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil
| | - Luciano Caseli
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil.
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8
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Machado AC, da Silva TRC, Raminelli C, Caseli L. The composition of fusogenic lipid mixtures at the air-water modulates the physicochemical properties changes upon interaction with lysicamine. Biophys Chem 2023; 293:106947. [PMID: 36566720 DOI: 10.1016/j.bpc.2022.106947] [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: 10/11/2022] [Revised: 12/14/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022]
Abstract
Knowing how a bioactive compound interacts with cell membranes is important to understand its effect at the molecular level. In this sense, this work aimed to study the interaction of lysicamine, an alkaloid with action against lung cancer cell lines, with lipid monolayers as cell membrane models. We employed two lipid mixtures: the first composed of 35% DOPC, 30% DOPE, 20% sphingomyelin, and 15% cholesterol as healthy cell membranes models (MM1), and the second replacing DOPC with DOPS as cancer cells models (MM2). The interaction of lysicamine with the monolayers was evaluated using tensiometry, Brewster angle microscopy (BAM), and polarization-modulated infrared reflection-absorption spectroscopy (PM-IRRAS). Lysicamine had interfacial effects in both membrane models. For MM 1, it expanded the lipid monolayer and changed the interfacial rheological properties, increasing the in-plane elasticity of the films. PM-IRRAS spectra suggested a higher conformational disorder of the alkyl chains of the lipids. For MM 2, lysicamine also shifted the isotherms to higher areas, expanding the monolayers, but with no significant alteration in their interfacial rheological properties. PM-IRRAS spectra also suggested higher disorder in the orientation of the lipid alkyl chains upon lysicamine incorporation. For both models, BAM did not show alteration in interfacial aggregation upon drug incorporation. In conclusion, changes in some interfacial properties of membrane models caused by lysicamine depend on the monolayer composition, which can be associated with its bioactivity in cellular membranes.
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Affiliation(s)
- André Campos Machado
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil
| | | | - Cristiano Raminelli
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil
| | - Luciano Caseli
- Department of chemistry, Federal University of São Paulo (UNIFESP), Diadema, São Paulo, Brazil.
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9
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Deal AM, Vaida V. Infrared Reflection–Absorption Spectroscopy of α-Hydroxyacids at the Water–Air Interface. J Phys Chem A 2022; 126:8280-8294. [DOI: 10.1021/acs.jpca.2c04462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexandra M. Deal
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
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10
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Frandsen BN, Vaida V. Spectroscopy of Retinoic Acid at the Air-Water Interface. J Phys Chem A 2022; 126:6908-6919. [PMID: 36129815 DOI: 10.1021/acs.jpca.2c04873] [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 spectroscopy of all-trans-retinoic acid (ATRA), an important molecule of biological origin that can be found in nature, is investigated at the air-water interface using UV-Vis and IR reflection spectroscopy. We employ a UV-Vis reflection absorption spectroscopy (RAS) experiment along with infrared reflection absorption spectroscopy (IR-RAS) to probe ATRA at the air-water interface. We elucidate the factors influencing the spectroscopy of ATRA at the air-water interface and compare its spectra at the water surface with results of bulk samples obtained with conventional spectroscopic methods and computational chemistry. Monolayers of pure ATRA as well as mixed ATRA with stearic-d35 acid were prepared, and the spectroscopy reveals that ATRA forms J-aggregates with itself, causing a significant redshift of its S0 to S1 electronic transition. Pure ATRA monolayers are found to be unstable at the air-water interface and are lost from the surface over time due to the formation of aggregates. The mixture of ATRA and stearic-d35 acid has been shown to stabilize the monolayers and inhibit the loss of surface ATRA. On the basis of our observations, we propose that ATRA could be a significant photosensitizer in natural aqueous environments.
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Affiliation(s)
- Benjamin N Frandsen
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States.,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, UCB 216, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States.,Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, UCB 216, Boulder, Colorado 80309, United States
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11
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Dysmyelination and glycolipid interference caused by phenylalanine in phenylketonuria. Int J Biol Macromol 2022; 221:784-795. [PMID: 36099998 DOI: 10.1016/j.ijbiomac.2022.09.062] [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: 10/21/2021] [Revised: 09/07/2022] [Accepted: 09/07/2022] [Indexed: 11/20/2022]
Abstract
Phenylketonuria (PKU) is a metabolic disorder connected to an excess of phenylalanine (Phe) in the blood and tissues, with neurological consequences. The disease's molecular bases seem to be related to the accumulation of Phe at the cell membrane surface. Radiological outcomes in the brain demonstrate decreased water diffusivity in white matter, involving axon dysmyelination of not yet understood origin. We used a biophysical approach and model membranes to extend our knowledge of Phe-membrane interaction by clarifying Phe's propensity to affect membrane structure and dynamics based on lipid composition, with emphasis on modulating cholesterol and glycolipid components to mimic raft domains and myelin sheath membranes. Phe showed affinity for the investigated membrane mimics, mainly affecting the Phe-facing membrane leaflet. The surfaces of our neuronal membrane raft mimics were strong anchoring sites for Phe, showing rigidifying effects. From a therapeutic perspective, we further investigated the role of doxycycline, known to disturb Phe packing, unveiling its action as a competitor in Phe interactions with the membrane, suggesting its potential for treatment in the early stages of PKU. Our results suggest how Phe accumulation in extracellular fluids can impede normal growth of myelin sheaths by interfering with membrane slipping and by remodulating free water and myelin-associated water contents.
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12
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Nandi S, Mukhopadhyay A, Nandi PK, Bera N, Hazra R, Chatterjee J, Sarkar N. Amyloids Formed by Nonaromatic Amino Acid Methionine and Its Cross with Phenylalanine Significantly Affects Phospholipid Vesicle Membrane: An Insight into Hypermethioninemia Disorder. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8252-8265. [PMID: 35758025 DOI: 10.1021/acs.langmuir.2c00648] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The incorrect metabolic breakdown of the nonaromatic amino acid methionine (Met) leads to the disorder called hypermethioninemia via an unknown mechanism. To understand the molecular level pathogenesis of this disorder, we prepared a DMPC lipid membrane, the mimicking setup of the cell membrane, and explored the effect of the millimolar level of Met on it. We found that Met forms toxic fibrillar aggregates that disrupt the rigidity of the membrane bilayer, and increases the dynamic response of water molecules surrounding the membrane as well as the heterogeneity of the membrane. Such aggregates strongly deform red blood cells. This opens the requirement to consider therapeutic antagonists either to resist or to inhibit the toxic amyloid aggregates against hypermethioninemia. Moreover, such disrupting effect on membrane bilayer and cytotoxicity along with deformation effect on RBC by the cross amyloids of Met and Phenylalanine (Phe) was found to be most virulent. This exclusive observation of the enhanced virulent effect of the cross amyloids is expected to be an informative asset to explain the coexistence of two amyloid disorders.
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13
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Shiba H, Nishio M, Sawada M, Tamaki M, Michigami M, Nakai S, Nakase I, Fujii I, Matsumoto A, Kojima C. Carboxy-terminal dendrimers with phenylalanine for a pH-sensitive delivery system into immune cells including T cells. J Mater Chem B 2021; 10:2463-2470. [PMID: 34935852 DOI: 10.1039/d1tb01980e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Although T cells play important roles in various immune reactions, there are only a few reports on delivery systems into T cells. Our previous study showed that carboxy-terminal phenylalanine (Phe)-modified polyamidoamine (PAMAM) dendrimers have both temperature- and pH-sensitive properties, which are affected by the chemical structure. The self-assembled structures of Phe, observed in phenylketonuria, enhance the protein aggregation, the association with the cell membrane and the membrane permeability. In this study, we applied the Phe-modified dendrimers to a pH-sensitive drug delivery system into T cells. Dendrimers with different amino acids and acid anhydrides were synthesized, and their pH-responsive association with T cells and their subsets was investigated. The dendrimers modified with Phe and cyclohexanedicarboxylic acid (CHex) showed higher uptake into various cells, including Jurkat cells, CD3+ T cells, CD3 + CD4+ helper T cells and CD3 + CD8+ killer T cells. These dendrimers were internalized into T cells via endocytosis, and their cellular uptake was enhanced under weak acidic conditions (pH 6.5). Our results showed that Phe- and CHex-modified dendrimers have a delivery potential to T cells and their subsets, which may be useful for cancer immunotherapy.
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Affiliation(s)
- Hiroya Shiba
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Misaki Nishio
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Mei Sawada
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Mamiko Tamaki
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Masataka Michigami
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Shinya Nakai
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ikuhiko Nakase
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Ikuo Fujii
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Akikazu Matsumoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
| | - Chie Kojima
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
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14
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Erimban S, Daschakraborty S. How does excess phenylalanine affect the packing density and fluidity of a lipid membrane? Phys Chem Chem Phys 2021; 23:27294-27303. [PMID: 34850794 DOI: 10.1039/d1cp05004d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenylketonuria (PKU) is an autosomal recessive error of phenylalanine (Phe) metabolism, where untreated Phe becomes cytotoxic. Previous experiments found that excess Phe decreases the packing density and increases the fluidity and permeability of a lipid membrane. It was proposed that Phe forms cytotoxic nanoscopic amyloid-like fibrils. In another study, the Phe fibrils were not visible near the lipid membrane. So, what leads to the deleterious effect of Phe on the lipid membrane? We put forward a molecular mechanism for the observed effect of excess Phe on the lipid membrane using all-atom molecular dynamics simulation. This study suggests that Phe monomers spontaneously intercalate into the membrane and form small hydrogen-bonded clusters, some of which locally perturb the membrane. These local effects result in an overall reduction in the membrane packing density, enhancement of membrane fluidity, and an increase of water permeability, observed in experiments. The present study does not observe any effect of the nanoscopic fibrillar structure of Phe on the membrane. This study, therefore, provides alternative insights into the excess Phe cytotoxicity in PKU disease.
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Affiliation(s)
- Shakkira Erimban
- Department of Chemistry, Indian Institute of Technology Patna, Bihar, 801106, India.
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15
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Róg T, Girych M, Bunker A. Mechanistic Understanding from Molecular Dynamics in Pharmaceutical Research 2: Lipid Membrane in Drug Design. Pharmaceuticals (Basel) 2021; 14:1062. [PMID: 34681286 PMCID: PMC8537670 DOI: 10.3390/ph14101062] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022] Open
Abstract
We review the use of molecular dynamics (MD) simulation as a drug design tool in the context of the role that the lipid membrane can play in drug action, i.e., the interaction between candidate drug molecules and lipid membranes. In the standard "lock and key" paradigm, only the interaction between the drug and a specific active site of a specific protein is considered; the environment in which the drug acts is, from a biophysical perspective, far more complex than this. The possible mechanisms though which a drug can be designed to tinker with physiological processes are significantly broader than merely fitting to a single active site of a single protein. In this paper, we focus on the role of the lipid membrane, arguably the most important element outside the proteins themselves, as a case study. We discuss work that has been carried out, using MD simulation, concerning the transfection of drugs through membranes that act as biological barriers in the path of the drugs, the behavior of drug molecules within membranes, how their collective behavior can affect the structure and properties of the membrane and, finally, the role lipid membranes, to which the vast majority of drug target proteins are associated, can play in mediating the interaction between drug and target protein. This review paper is the second in a two-part series covering MD simulation as a tool in pharmaceutical research; both are designed as pedagogical review papers aimed at both pharmaceutical scientists interested in exploring how the tool of MD simulation can be applied to their research and computational scientists interested in exploring the possibility of a pharmaceutical context for their research.
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Affiliation(s)
- Tomasz Róg
- Department of Physics, University of Helsinki, 00014 Helsinki, Finland;
| | - Mykhailo Girych
- Department of Physics, University of Helsinki, 00014 Helsinki, Finland;
| | - Alex Bunker
- Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, 00014 Helsinki, Finland;
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16
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Nandi S, Ghosh B, Ghosh M, Layek S, Nandi PK, Sarkar N. Phenylalanine Interacts with Oleic Acid-Based Vesicle Membrane. Understanding the Molecular Role of Fibril-Vesicle Interaction under the Context of Phenylketonuria. J Phys Chem B 2021; 125:9776-9793. [PMID: 34420302 DOI: 10.1021/acs.jpcb.1c05592] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In the present contribution, on the basis of a spectroscopic and microscopic investigation, the characterization and photophysics of various assemblies of oleic acid/oleate solution at three pH values, namely, 8.28, 9.72, and 11.77, were explored. The variation in the dynamic response of aqua molecules in and around the assemblies has been interrogated by a picoseconds solvation dynamics experiment using a time-correlated single-photon counting setup employing coumarin-153 as a probe. On the one hand, the time-resolved fluorescence anisotropy measurement along with the fluorescence correlation spectroscopy experiment was executed to extract information regarding the comparison of the extent of the internal restricted confinement of these assemblies. On the other hand, an effort to investigate the cross-interaction between the self-assembled architectures of l-phenylalanine (l-Phe), responsible for phenylketonuria (PKU) disorder, and the oleic acid at the vesicle-forming pH established that the l-Phe fibrillar morphologies strongly alter the dynamic properties of the vesicle membrane formed by the oleic acid. Specifically, the interaction of the l-Phe assemblies with the oleic acid vesicle membrane is found to introduce the flexibility of the vesicle membrane and alter the hydration properties of the membrane. To track the fibril-induced alterations of the oleic acid vesicle properties, various spectroscopic and microscopic investigations were performed. The mutual reconciliation of the experimental outputs, therefore, portrays the state of the art, which accounts for the fibril-induced alterations of the properties of the oleic acid vesicle membrane, the mimicking setup of the cellular membrane, thereby informing us that alterations of such a property of the membrane should be taken into active consideration during the rational development of therapeutic modulators against disorders like PKU.
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Affiliation(s)
- Sourav Nandi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Biswajoy Ghosh
- School of Medical Science and Technology, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Meghna Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Souvik Layek
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Pratyush Kiran Nandi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal 721302, India
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17
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Adsi H, Levkovich SA, Haimov E, Kreiser T, Meli M, Engel H, Simhaev L, Karidi-Heller S, Colombo G, Gazit E, Laor Bar-Yosef D. Chemical Chaperones Modulate the Formation of Metabolite Assemblies. Int J Mol Sci 2021; 22:9172. [PMID: 34502079 PMCID: PMC8431448 DOI: 10.3390/ijms22179172] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 08/18/2021] [Accepted: 08/19/2021] [Indexed: 11/16/2022] Open
Abstract
The formation of amyloid-like structures by metabolites is associated with several inborn errors of metabolism (IEMs). These structures display most of the biological, chemical and physical properties of protein amyloids. However, the molecular interactions underlying the assembly remain elusive, and so far, no modulating therapeutic agents are available for clinical use. Chemical chaperones are known to inhibit protein and peptide amyloid formation and stabilize misfolded enzymes. Here, we provide an in-depth characterization of the inhibitory effect of osmolytes and hydrophobic chemical chaperones on metabolite assemblies, thus extending their functional repertoire. We applied a combined in vivo-in vitro-in silico approach and show their ability to inhibit metabolite amyloid-induced toxicity and reduce cellular amyloid content in yeast. We further used various biophysical techniques demonstrating direct inhibition of adenine self-assembly and alteration of fibril morphology by chemical chaperones. Using a scaffold-based approach, we analyzed the physiochemical properties of various dimethyl sulfoxide derivatives and their role in inhibiting metabolite self-assembly. Lastly, we employed whole-atom molecular dynamics simulations to elucidate the role of hydrogen bonds in osmolyte inhibition. Our results imply a dual mode of action of chemical chaperones as IEMs therapeutics, that could be implemented in the rational design of novel lead-like molecules.
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Affiliation(s)
- Hanaa Adsi
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | - Shon A. Levkovich
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | - Elvira Haimov
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Topaz Kreiser
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
| | | | - Hamutal Engel
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Luba Simhaev
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
| | - Shai Karidi-Heller
- The Future Scientists Center–Alpha Program at Tel Aviv Youth University, Tel Aviv 6997801, Israel;
| | - Giorgio Colombo
- SCITEC-CNR, via Mario Bianco 9, 20131 Milano, Italy; (M.M.); (G.C.)
- Department of Chemistry, University of Pavia, via Taramelli 12, 27100 Pavia, Italy
| | - Ehud Gazit
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
- BLAVATNIK CENTER for Drug Discovery, Tel Aviv University, Tel Aviv 6997801, Israel; (E.H.); (H.E.); (L.S.)
- Department of Materials Science and Engineering, Iby and Aladar Fleischman Faculty of Engineering, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Dana Laor Bar-Yosef
- Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel; (H.A.); (S.A.L.); (T.K.)
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18
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Abstract
Theoretical chemists have been actively engaged for some time in processes such as ozone photodissociation, overtone photodissociation in nitric acid, pernitric acid, sulphuric acid, clusters and in small organic acids. The last of these have shown very different behaviours in the gas phase, liquid phase and importantly at the air–water interface in aqueous aerosols. The founder of molecular dynamics, B J Alder, pointed out long ago that hydrodynamic behaviour emerged when the symmetry of a random, thermalised population of hard spheres—billiard balls—was broken by a flux of energetic molecules. Despite this, efforts over two centuries to solve turbulence by finding top-down solutions to the Navier–Stokes equation have failed. It is time for theoretical chemistry to try a bottom-up solution. Gibbs free energy that drives the circulation arises from the entropy difference between the incoming low-entropy beam of visible and ultraviolet photons and the outgoing higher-entropy flux of infrared photons over the whole 4π solid angle. The role of the most energetic molecules with the highest velocities will affect the rovibrational line shapes of water, carbon dioxide and ozone in the far wings, where there is the largest effect on radiative transfer and hence on calculations of atmospheric temperature. The atmospheric state is determined by the interaction of radiation, chemistry and fluid dynamics on the microscopic scale, with propagation through the mesoscale to the macroscale. It will take theoretical chemistry to simulate that accurately. A challenging programme of research for theoretical chemistry is proposed, involving ab initio simulation by molecular dynamics of an air volume, starting in the upper stratosphere. The aim is to obtain scaling exponents for turbulence, providing a physical method for upscaling in numerical models. Turbulence affects chemistry, radiation and fluid dynamics at a fundamental, molecular level and is thus of basic concern to theoretical chemistry as it applies to the atmosphere, which consists of molecules in motion.
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19
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Kappes KJ, Deal AM, Jespersen MF, Blair SL, Doussin JF, Cazaunau M, Pangui E, Hopper BN, Johnson MS, Vaida V. Chemistry and Photochemistry of Pyruvic Acid at the Air–Water Interface. J Phys Chem A 2021; 125:1036-1049. [DOI: 10.1021/acs.jpca.0c09096] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Keaten J. Kappes
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Alexandra M. Deal
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Malte F. Jespersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Sandra L. Blair
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Jean-Francois Doussin
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Mathieu Cazaunau
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Edouard Pangui
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Creteil, France
| | - Brianna N. Hopper
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Matthew S. Johnson
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Veronica Vaida
- Department of Chemistry and Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, Colorado 80309, United States
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20
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Perkins RJ, Vazquez de Vasquez MG, Beasley EE, Hill TCJ, Stone EA, Allen HC, DeMott PJ. Relating Structure and Ice Nucleation of Mixed Surfactant Systems Relevant to Sea Spray Aerosol. J Phys Chem A 2020; 124:8806-8821. [PMID: 32924483 DOI: 10.1021/acs.jpca.0c05849] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Ice nucleating particles (INPs) influence weather and climate by their effect on cloud phase state. Fatty alcohols present within aerosol particles confer a potentially important source of ice nucleation activity to sea spray aerosol produced in oceanic regions. However, their interactions with other aerosol components and the influence on freezing were previously largely unknown. Here, we report quantitative measurements of fatty alcohols in model sea spray aerosol and examine the relationships between the composition and structure of the surfactants and subphase in the context of these measurements. Deposited mixtures of surfactants retain the ability to nucleate ice, even in fatty acid-dominant compositions. Strong refreezing effects are also observed, where previously frozen water-surfactant samples nucleate more efficiently. Structural sources of refreezing behavior are identified as either kinetically trapped film states or three-dimensional (3D) solid surfactant particles. Salt effects are especially important for surfactant INPs, where high salt concentrations suppress freezing. A simple water uptake model suggests that surfactant-containing aerosol requires either very low salt content or kinetic trapping as solid particles to act as INPs in the atmosphere. These types of INPs could be identified through comparison of different INP instrument responses.
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Affiliation(s)
- Russell J Perkins
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Maria G Vazquez de Vasquez
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Emma E Beasley
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Thomas C J Hill
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Elizabeth A Stone
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Heather C Allen
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - Paul J DeMott
- Department of Atmospheric Science, Colorado State University, Fort Collins, Colorado 80523, United States
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21
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Banerjee P, Rajak K, Nandi PK, Pal S, Ghosh M, Mishra S, Sarkar N. Aging-Dependent Morphological Crystallinity Determines Membrane Activity of l-Phenylalanine Self-Assembles. J Phys Chem Lett 2020; 11:8585-8591. [PMID: 32931285 DOI: 10.1021/acs.jpclett.0c01831] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Amyloid polymorphism has emerged as an important topic of research in recent years to identify the particular species responsible for several neurodegenerative disorders, whereas the concept is overlooked in the case of the simplest building block, that is, l-phenylalanine (l-Phe) self-assembly. Here, we report the first evidence of l-Phe polymorphism and the conversion of metastable helical fibrillar to thermodynamically stable rodlike crystalline morphologies with increasing time and temperature. Furthermore, only the fibrillar l-Phe polymorph shows a significant modulation of the model membrane. In addition, the l-Phe molecules prefer to arrange in a multilayered rodlike fashion than in a lateral arrangement, which reduces the membrane binding ability of the l-Phe polymorph due to the decrease in the partial charge of the N-terminal of l-Phe units. The present work exemplifies a different approach to understanding l-Phe self-assembly and provides an effective strategy for the therapy of phenylketonuria by scrutinizing the discrete membrane activity of different l-Phe polymorphs.
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Affiliation(s)
- Pavel Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Karunamoy Rajak
- Centre for Theoretical Studies, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Pratyush Kiran Nandi
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Siddhartha Pal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Meghna Ghosh
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Sabyashachi Mishra
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
- Centre for Computational and Data Sciences, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
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22
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Trapani G, Caruso VCL, Cucci LM, Attanasio F, Tabbì G, Forte G, La Mendola D, Satriano C. Graphene Oxide Nanosheets Tailored With Aromatic Dipeptide Nanoassemblies for a Tuneable Interaction With Cell Membranes. Front Bioeng Biotechnol 2020; 8:427. [PMID: 32457892 PMCID: PMC7227426 DOI: 10.3389/fbioe.2020.00427] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 04/14/2020] [Indexed: 12/17/2022] Open
Abstract
Engineered graphene-based derivatives are attractive and promising candidates for nanomedicine applications because of their versatility as 2D nanomaterials. However, the safe application of these materials needs to solve the still unanswered issue of graphene nanotoxicity. In this work, we investigated the self-assembly of dityrosine peptides driven by graphene oxide (GO) and/or copper ions in the comparison with the more hydrophobic diphenylalanine dipeptide. To scrutinize the peptide aggregation process, in the absence or presence of GO and/or Cu2+, we used atomic force microscopy, circular dichroism, UV-visible, fluorescence and electron paramagnetic resonance spectroscopies. The perturbative effect by the hybrid nanomaterials made of peptide-decorated GO nanosheets on model cell membranes of supported lipid bilayers was investigated. In particular, quartz crystal microbalance with dissipation monitoring and fluorescence recovery after photobleaching techniques were used to track the changes in the viscoelastic properties and fluidity of the cell membrane, respectively. Also, cellular experiments with two model tumour cell lines at a short time of incubation, evidenced the high potential of this approach to set up versatile nanoplatforms for nanomedicine and theranostic applications.
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Affiliation(s)
- Giuseppe Trapani
- Scuola Superiore di Catania, University of Catania, Catania, Italy
| | | | - Lorena Maria Cucci
- Department of Chemical Sciences, Nano Hybrid BioInterfaces Lab (NHBIL), University of Catania, Catania, Italy
| | | | - Giovanni Tabbì
- Institute of Crystallography - National Council of Research, Catania, Italy
| | - Giuseppe Forte
- Department of Pharmaceutical Sciences, University of Catania, Catania, Italy
| | | | - Cristina Satriano
- Department of Chemical Sciences, Nano Hybrid BioInterfaces Lab (NHBIL), University of Catania, Catania, Italy
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23
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Nandi S, Pyne A, Ghosh M, Banerjee P, Ghosh B, Sarkar N. Antagonist Effects of l-Phenylalanine and the Enantiomeric Mixture Containing d-Phenylalanine on Phospholipid Vesicle Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2459-2473. [PMID: 32073868 DOI: 10.1021/acs.langmuir.9b03543] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
One of the congenital flaws of metabolism, phenylketonuria (PKU), is known to be related to the self-assembly of toxic fibrillar aggregates of phenylalanine (Phe) in blood at elevated concentrations. Our experimental findings using l-phenylalanine (l-Phe) at millimolar concentration suggest the formation of fibrillar morphologies in the dry phase, which in the solution phase interact strongly with the model membrane composed of 1,2-diacyl-sn-glycero-phosphocholine (LAPC) lipid, thereby decreasing the rigidity (or increasing the fluidity) of the membrane. The hydrophobic interaction, in addition to the electrostatic attraction of Phe with the model membrane, is found to be responsible for such phenomena. On the contrary, various microscopic observations reveal that such fibrillar morphologies of l-Phe are severely ruptured in the presence of its enantiomer d-phenylalanine (d-Phe), thereby converting the fibrillar morphologies into crushed flakes. Various biophysical studies, including the solvation dynamics experiment, suggest that this l-Phe in the presence of d-Phe, when interacting with the same model membrane, now reverts the rigidity of the membrane, i.e., increases the rigidity of the membrane, which was lost due to interaction with l-Phe exclusively. Fluorescence anisotropy measurements also support this reverse rigid character of the membrane in the presence of an enantiomeric mixture of amino acids. A comprehensive understanding of the interaction of Phe with the model membrane is further pursued at the single-molecular fluorescence detection level using fluorescence correlation spectroscopy (FCS) experiments. Therefore, our experimental conclusion interprets a linear correlation between increased permeability and enhanced fluidity of the membrane in the presence of l-Phe and certifies d-Phe as a therapeutic modulator of l-Phe fibrillar morphologies. Further, the study proposes that the rigidity of the membrane lost due to interaction with l-Phe was reinstated-in fact, increased-in the presence of the enantiomeric mixture containing both d- and l-Phe.
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24
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Banerjee P, Pyne A, Sarkar N. Understanding the Self-Assembling Behavior of Biological Building Block Molecules: A Spectroscopic and Microscopic Approach. J Phys Chem B 2020; 124:2065-2080. [PMID: 32081003 DOI: 10.1021/acs.jpcb.9b09123] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
"Mother nature" utilizes molecular self-assembly as an efficient tool to design several fascinating supramolecular architectures from simple building blocks like amino acids, peptides, and nucleobases. The self-assembling behavior of various biologically important molecules, morphological outcomes, molecular mechanism of association, and finally their applications in the real world draw broad interest from chemical and biological point of views. In this present Feature Article, the amyloid hypothesis is extended to include nonproteinaceous single metabolites that invoke a new paradigm for the pathology of inborn metabolic disorders. In this scenario, we dedicate this paper to understanding the morphological consequences and mechanistic insight of the self-assembly of some important amino acids (e.g., l-phenylalanine, l-tyrosine, glycine, etc.) and nucleobases (adenine and eight uracil moiety derivatives). Using proper spectroscopic and microscopic tools, distinct assembling mechanisms of different amino acids and nucleobases have been established. Again, lanthanides, polyphenolic compounds such as crown ethers, and a worldwide drink, beer, are elegantly employed as inhibitors of the resulting fibrillar aggregated structures. As a consequence, this study will cover literally a vast region in the self-assembling outcomes of single biologically important molecules, and therefore, we expect that a detailed understanding of such morphological outcomes using spectroscopic and microscopic approaches may open a new paradigm in this burgeoning field.
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Affiliation(s)
- Pavel Banerjee
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302 WB, India
| | - Arghajit Pyne
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302 WB, India
| | - Nilmoni Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302 WB, India
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25
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Karimova NV, Chen J, Gord JR, Staudt S, Bertram TH, Nathanson GM, Gerber RB. S N2 Reactions of N 2O 5 with Ions in Water: Microscopic Mechanisms, Intermediates, and Products. J Phys Chem A 2020; 124:711-720. [PMID: 31880456 DOI: 10.1021/acs.jpca.9b09095] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Reactions of dinitrogen pentoxide (N2O5) greatly affect the concentrations of NO3, ozone, OH radicals, methane, and more. In this work, we employ ab initio molecular dynamics and other tools of computational chemistry to explore reactions of N2O5 with anions hydrated by 12 water molecules to shed light on this important class of reactions. The ions investigated are Cl-, SO42-, ClO4-, and RCOO- (R = H, CH3, C2H5). The following main results are obtained: (i) all the reactions take place by an SN2-type mechanism, with a transition state that involves a contact ion pair (NO2+NO3-) that interacts strongly with water molecules. (ii) Reactions of a solvent-separated nitronium ion (NO2+) are not observed in any of the cases. (iii) An explanation is provided for the suppression of ClNO2 formation from N2O5 reacting with salty water when sulfate or acetate ions are present, as found in recent experiments. (iv) Formation of novel intermediate species, such as (SO4NO2-) and RCOONO2, in these reactions is predicted. The results suggest atomistic-level mechanisms for the reactions studied and may be useful for the development of improved modeling of reaction kinetics in aerosol particles.
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Affiliation(s)
- Natalia V Karimova
- Department of Chemistry , University of California, Irvine , Irvine 92697 , California , United States
| | - James Chen
- Department of Chemistry , University of California, Irvine , Irvine 92697 , California , United States
| | - Joseph R Gord
- Department of Chemistry , University of Wisconsin-Madison , Madison 53706 , Wisconsin , United States
| | - Sean Staudt
- Department of Chemistry , University of Wisconsin-Madison , Madison 53706 , Wisconsin , United States
| | - Timothy H Bertram
- Department of Chemistry , University of Wisconsin-Madison , Madison 53706 , Wisconsin , United States
| | - Gilbert M Nathanson
- Department of Chemistry , University of Wisconsin-Madison , Madison 53706 , Wisconsin , United States
| | - R Benny Gerber
- Department of Chemistry , University of California, Irvine , Irvine 92697 , California , United States.,Institute of Chemistry and Fritz Haber Research Center , Hebrew University of Jerusalem , Jerusalem 91904 , Israel
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26
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Argudo PG, Contreras-Montoya R, Álvarez de Cienfuegos L, Martín-Romero MT, Camacho L, Giner-Casares JJ. Optimization of Amino Acid Sequence of Fmoc-Dipeptides for Interaction with Lipid Membranes. J Phys Chem B 2019; 123:3721-3730. [DOI: 10.1021/acs.jpcb.9b01132] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Pablo G. Argudo
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Facultad de Ciencias, Universidad de Córdoba (UCO), Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Rafael Contreras-Montoya
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Granada (UGR), C. U. Fuentenueva, Granada E-18071, Spain
| | - Luis Álvarez de Cienfuegos
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Granada (UGR), C. U. Fuentenueva, Granada E-18071, Spain
| | - María T. Martín-Romero
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Facultad de Ciencias, Universidad de Córdoba (UCO), Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Luis Camacho
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Facultad de Ciencias, Universidad de Córdoba (UCO), Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
| | - Juan J. Giner-Casares
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Facultad de Ciencias, Universidad de Córdoba (UCO), Campus de Rabanales, Ed. Marie Curie, E-14071 Córdoba, Spain
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27
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Ziaunys M, Smirnovas V. Emergence of visible light optical properties of L-phenylalanine aggregates. PeerJ 2019; 7:e6518. [PMID: 30828498 PMCID: PMC6394350 DOI: 10.7717/peerj.6518] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Accepted: 01/26/2019] [Indexed: 01/09/2023] Open
Abstract
The ability of phenylalanine to form fibrillar nanostructures was demonstrated on multiple occasions, and such an oligomerization reaction could be the cause of cytotoxicity in patients with phenylketonuria. These findings were supported by claims that L-phenylalanine (Phe) fibrils have amyloid properties and can be detected using thioflavin T fluorescence assay. However, a part of Phe aggregation studies reported the opposite data, suggesting no amyloid structures to be formed. Due to the contradicting reports, the amyloid nature of Phe aggregates remains uncertain. In this work we tested Phe aggregation under conditions where amyloid formation was previously reported. We show the emergence of Phe aggregates with visible light optical properties that overlap with the spectra of dyes used in amyloid fibril assays, which could lead to false-positive identifications.
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Affiliation(s)
- Mantas Ziaunys
- Vilnius University, Life Sciences Center, Institute of Biotechnology, Vilnius, Lithuania
| | - Vytautas Smirnovas
- Vilnius University, Life Sciences Center, Institute of Biotechnology, Vilnius, Lithuania
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28
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Cutro AC, Disalvo EA, Frías MA. Effects of Phenylalanine on the Liquid-Expanded and Liquid-Condensed States of Phosphatidylcholine Monolayers. Lipid Insights 2019; 12:1178635318820923. [PMID: 30643419 PMCID: PMC6322106 DOI: 10.1177/1178635318820923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 11/29/2018] [Indexed: 11/25/2022] Open
Abstract
Background: Phenylalanine (Phe) is involved in physiological and pathological processes in cell membranes in which expanded and condensed states coexist. In this direction, it was reported that surface hydration is important for the binding affinity of the amino acid which significantly perturbs 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) monolayer structure and morphology. A deeper insight showed that Phe inserts in DPPC monolayer defects as a monomer at pH 5 and forms aggregates that adsorb to the membrane surface generating a reconfiguration of the lipid arrangement in areas of higher packing. This new arrangement in the monolayer causes the reorientation of dipoles of lipid and water molecules which is congruent with the dehydration and surface tension changes reported above. With this background, this article studies the affinity of Phe in liquid-expanded 1,2-dimyristoyl-sn-glycero-3 phosphocholine (LE DMPC) and liquid-condensed 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (LC DPPC) monolayers and their effects on membrane properties. Results: The adsorption of Phe can be described by a cooperative process in non-independent sites suggesting that Phe/lipid systems reorganize to form new structures at a high degree of coverage. Compressibility modulus and Brewster angle microscopy (BAM) images allow to propose that Phe causes a new phase in 1,2-dimyristoyl-sn-glycero-3 phosphocholine (DMPC) and DPPC. Conclusions: Phe imposes new arrangements in the lipid phase to form new structures with different compressibility behavior than lipid binary mixtures of DMPC and DPPC. Phe interaction with the LC and LE phases gives place to a process in which a synergistic effect between non-independent sites can be produced. These features of Phe/lipid interaction would be of great importance to understand the multiple effects of Phe on cell membranes.
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Affiliation(s)
- Andrea C Cutro
- Applied Biophysics and Food Research Center, Centro de Investigaciones en Biofísica Aplicada y Alimentos (CIBAAL), National University of Santiago del Estero and CONICET, Santiago del Estero, Argentina
| | - E Anibal Disalvo
- Applied Biophysics and Food Research Center, Centro de Investigaciones en Biofísica Aplicada y Alimentos (CIBAAL), National University of Santiago del Estero and CONICET, Santiago del Estero, Argentina
| | - María A Frías
- Applied Biophysics and Food Research Center, Centro de Investigaciones en Biofísica Aplicada y Alimentos (CIBAAL), National University of Santiago del Estero and CONICET, Santiago del Estero, Argentina
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29
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Kanti De S, Chakraborty A. Interaction of monomeric and self-assembled aromatic amino acids with model membranes: self-reproduction phenomena. Chem Commun (Camb) 2019; 55:15109-15112. [DOI: 10.1039/c9cc08495a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The spontaneous formation of amyloid structures of proteins is responsible for several major human neurodegenerative diseases.
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Affiliation(s)
- Soumya Kanti De
- Discipline of Chemistry
- Indian Institute of Technology
- Indore 453552
- India
| | - Anjan Chakraborty
- Discipline of Chemistry
- Indian Institute of Technology
- Indore 453552
- India
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30
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Argudo PG, Contreras-Montoya R, Álvarez de Cienfuegos L, Martín-Romero MT, Camacho L, Giner-Casares JJ. Subtle chemical modification for enrichment of Fmoc-amino acid at a phospholipid interface. RSC Adv 2019; 9:37188-37194. [PMID: 35542247 PMCID: PMC9075599 DOI: 10.1039/c9ra03896e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 11/06/2019] [Indexed: 11/24/2022] Open
Abstract
Amino acids including the Fmoc group (9-fluorenylmethyloxycarbonyl) are bioinspired molecules that display intriguing features in self-assembly and biological applications. The influence of a delicate chemical modification between Fmoc-F and Fmoc-Y on the interaction with a phospholipid surface was analyzed. Langmuir monolayers of the 1,2-dimyristoyl-sn-glycero-3-phosphate (DMPA) phospholipid were used to mimic the eukaryotic cell membrane. In situ Brewster angle microscopy and UV-vis reflection spectroscopy provided insights on the effect of the Fmoc-amino acid derivatives on the DMPA phospholipid. The formation of H-bonds between the Fmoc-Y and the DMPA molecules was assessed, demonstrating the crucial role of the hydroxyl group of Fmoc-Y in enhancing the interaction with biosurfaces. A modest chemical modification of the Fmoc-amino acids led to enhanced interaction with a model surface for biomembrane.![]()
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Affiliation(s)
- Pablo G. Argudo
- Departamento de Química Física y T. Aplicada
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN
- Facultad de Ciencias
- Universidad de Córdoba (UCO)
- E-14071 Córdoba
| | - Rafael Contreras-Montoya
- Departamento de Química Orgánica
- Facultad de Ciencias
- Universidad de Granada, (UGR)
- E-18071 Granada
- Spain
| | | | - María T. Martín-Romero
- Departamento de Química Física y T. Aplicada
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN
- Facultad de Ciencias
- Universidad de Córdoba (UCO)
- E-14071 Córdoba
| | - Luis Camacho
- Departamento de Química Física y T. Aplicada
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN
- Facultad de Ciencias
- Universidad de Córdoba (UCO)
- E-14071 Córdoba
| | - Juan J. Giner-Casares
- Departamento de Química Física y T. Aplicada
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN
- Facultad de Ciencias
- Universidad de Córdoba (UCO)
- E-14071 Córdoba
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31
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Adamczewski P, Tsoukanova V. Phenylalanine intercalation parameters for liquid-disordered phase domains - a membrane model study. BMC BIOPHYSICS 2018; 11:6. [PMID: 30473783 PMCID: PMC6237005 DOI: 10.1186/s13628-018-0047-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Accepted: 10/31/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND Propensity of phenylalanine (Phe) for nonpolar environments drives its intercalation into phospholipid membranes, which has been implicated in metabolic and neurological disorders. The knowledge of Phe intercalation parameters can be instrumental in understanding various membrane processes triggered by interactions with Phe, in particular the early events leading to the formation of nucleation/docking sites for the self-assembly of Phe amyloid fibrils at the membrane surface. RESULTS In this study, we used monolayers of phosphatidylethanolamine (DPPE) and phosphatidylcholine (DPPC) to mimic the membrane outer leaflet. Its initial interaction with Phe was modeled by injecting Phe into the aqueous phase underneath the monolayer. Constant pressure insertion assays augmented with epifluorescence microscopy imaging were used to monitor Phe intercalation. Our primary goal was to determine the Phe intercalation area, A Phe. Two values were obtained for A Phe, 33 ± 2 and 48 ± 3 Å2. CONCLUSIONS Phe appeared to discriminate between DPPE and DPPC packing, and use two modes of intercalation. The area of A Phe 33 ± 2 Å2 is consistent with a Phe monomer intercalating into membrane by inserting the phenyl ring nearly normal to the membrane surface. This mode has been found to operate in DPPE membranes. For DPPC membranes however, the value of A Phe = 48 ± 3 Å2 suggests that, from saline, Phe tends to intercalate as a larger species plausibly dragging along a counterion, Na+, in a Na+(Phe) complex.
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32
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Li J, Li S, Cheng S, Tsona NT, Du L. Emerging investigator series: exploring the surface properties of aqueous aerosols coated with mixed surfactants. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2018; 20:1500-1511. [PMID: 30371711 DOI: 10.1039/c8em00419f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Mixed Langmuir monolayers of cholesterol with both saturated and unsaturated fatty acids, stearic acid (SA), and oleic acid (OA) spread at the air-seawater surface were studied. The phase behavior, molecular interaction, and conformational order of the monolayers were investigated by surface pressure-area (π-A) isotherms and infrared reflection-absorption spectroscopy (IRRAS) measurements. The thermodynamic parameters of the mixed films, including excess molecular area and excess Gibbs free energy were calculated by using the isotherm data. The interaction between SA (or OA) and cholesterol varied with the molar fraction of the fatty acids and surface pressure. OA/chol monolayers showed the characteristics of miscibility, but they acted as nonideal systems. Cholesterol has been observed to have a stabilizing effect on OA monolayers. The negative values of the excess Gibbs free energy in the entire composition range demonstrated that mixed OA/chol monolayers were thermodynamically stable. IRRAS spectra showed that mixing with cholesterol changes the ordering of fatty acid monolayers at the air-seawater surface. The findings provide general information regarding the structural changes in the monolayer induced by lateral packing. These results help in the understanding of the mixing behavior of fatty acids and cholesterol and provide insights into the fate of the mixed-monolayer-coated sea salt aerosol in the ocean environment.
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Affiliation(s)
- Junyao Li
- Environment Research Institute, Shandong University, Binhai Road 72, Qingdao, 266237, China.
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33
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Kundu N, Banik D, Sarkar N. Self-Assembly of Amphiphiles into Vesicles and Fibrils: Investigation of Structure and Dynamics Using Spectroscopy and Microscopy Techniques. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11637-11654. [PMID: 29544249 DOI: 10.1021/acs.langmuir.7b04355] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Amphiphiles are a class of molecules which are known to assemble into a variety of nanostructures. The understanding and applications of self-assembled systems are based on what has been learned from biology. Among the vast number of self-assemblies, in this article, we have described the formation, characterization, and dynamics of two important biologically inspired assemblies: vesicles and fibrils. Vesicles, which can be classified into several categories depending on the sizes and components, are of great interest due to their potential applications in drug delivery and as nanoscale reactors. The structure and dynamics of vesicles can also mimic the complex geometry of the cell membrane. On the other hand, the self-assembly of proteins, peptides, and even single amino acids leads to a number of degenerative disorders. Thus, a complete understanding of these self-assembled systems is necessary. In this article, we discuss recent work on vesicular aggregates composed of phospholipids, fatty acids, and ionic as well as nonionic surfactants and single amino acid-based fibrils such as phenylalanine and tyrosine. Beside the characterization, we also emphasize the excited-state dynamics inside the aggregates for a proper understanding of the organization, reactivity, and heterogeneity of the aggregates.
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Affiliation(s)
- Niloy Kundu
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , WB India
| | - Debasis Banik
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , WB India
| | - Nilmoni Sarkar
- Department of Chemistry , Indian Institute of Technology , Kharagpur 721302 , WB India
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34
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Link KA, Hsieh CY, Tuladhar A, Chase Z, Wang Z, Wang H, Walker RA. Vibrational studies of saccharide-induced lipid film reorganization at aqueous/air interfaces. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.02.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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35
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Saaka Y, Allen DT, Luangwitchajaroen Y, Shao Y, Campbell RA, Lorenz CD, Lawrence MJ. Towards optimised drug delivery: structure and composition of testosterone enanthate in sodium dodecyl sulfate monolayers. SOFT MATTER 2018; 14:3135-3150. [PMID: 29629469 DOI: 10.1039/c7sm01893b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Surface tension and specular neutron reflectivity measurements have been used, for the first time to systematically study both the interfacial structure and composition of monolayers of the soluble surfactant, sodium dodecyl sulfate containing a low-dose, poorly water soluble drug, testosterone enanthate. Modelling of the specular neutron reflectivity data suggests that the hydrophobic testosterone enanthate was adsorbed in the C12 hydrophobic tail region of the surfactant monolayer, regardless of the concentration of surfactant at the interface and whether or not additional drug was added to the interface. The location of the hydrophobic drug in the tail region of the surfactant monolayer is supported by the results of classical, large-scale molecular dynamics simulations. The thickness of the surfactant monolayer obtained, in the presence and absence of drug, using molecular dynamics simulations was in good agreement with the corresponding values obtained from the specular neutron reflectivity measurements. The stoichiometry of surfactant:drug at the air-water interface at sodium dodecyl sulfate concentrations above the critical micelle concentration was determined from specular neutron reflectivity measurements to be approximately 3 : 1, and remained constant after the spreading of further testosterone enanthate at the interface. Significantly, this stoichiometry was the same as that obtained in the micelles from bulk solubilisation studies. Important insights into the preferred location of drug in surfactant monolayers at the air-water interface as well as its effect on the structure of the monolayer have been obtained from our combined use of experimental and simulation techniques.
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Affiliation(s)
- Yussif Saaka
- Institute of Pharmaceutical Sciences, Faculty of Life Sciences and Medicine, King's College London, Franklin-Wilkins Building, Stamford Street, London SE1 9NH, UK
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36
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Uyaver S, Hernandez HW, Habiboglu MG. Self-assembly of aromatic amino acids: a molecular dynamics study. Phys Chem Chem Phys 2018; 20:30525-30536. [DOI: 10.1039/c8cp06239k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Common structures identified in the assembly of aromatic amino acids and their mixtures include the four-fold tube (a and b) and the zig-zag structure (c and d).
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37
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Affiliation(s)
- Russell Perkins
- University of Colorado Boulder, 215 UCB, Boulder, Colorado 80309, United States
| | - Veronica Vaida
- University of Colorado Boulder, 215 UCB, Boulder, Colorado 80309, United States
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38
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Cochran RE, Ryder OS, Grassian VH, Prather KA. Sea Spray Aerosol: The Chemical Link between the Oceans, Atmosphere, and Climate. Acc Chem Res 2017; 50:599-604. [PMID: 28945390 DOI: 10.1021/acs.accounts.6b00603] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The oceans, atmosphere, and clouds are all interconnected through the release and deposition of chemical species, which provide critical feedback in controlling the composition of our atmosphere and climate. To better understand the couplings between the ocean and atmosphere, it is critical to improve our understanding of the processes that control sea spray aerosol (SSA) composition and which ones plays the dominate role in regulating atmospheric chemistry and climate.
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Affiliation(s)
- Richard E. Cochran
- Department
of Chemistry and Biochemistry and ‡Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0314, United States
| | - Olivia S. Ryder
- Department
of Chemistry and Biochemistry and ‡Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0314, United States
| | - Vicki H. Grassian
- Department
of Chemistry and Biochemistry and ‡Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0314, United States
| | - Kimberly A. Prather
- Department
of Chemistry and Biochemistry and ‡Scripps Institution of Oceanography, University of California, San Diego, 9500 Gilman Dr., La Jolla, California 92093-0314, United States
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39
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Marín-Yaseli MR, González-Toril E, Mompeán C, Ruiz-Bermejo M. The Role of Aqueous Aerosols in the “Glyoxylate Scenario”: An Experimental Approach. Chemistry 2016; 22:12785-99. [DOI: 10.1002/chem.201602195] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Margarita R. Marín-Yaseli
- Departamento de Evolución Molecular; Centro de Astrobiología (INTA-CSIC); Ctra. Torrejón-Ajlavir km 4,8 28850 Torrejón de Ardoz Madrid Spain
| | - Elena González-Toril
- Departamento de Evolución Molecular; Centro de Astrobiología (INTA-CSIC); Ctra. Torrejón-Ajlavir km 4,8 28850 Torrejón de Ardoz Madrid Spain
| | - Cristina Mompeán
- Departamento de Evolución Molecular; Centro de Astrobiología (INTA-CSIC); Ctra. Torrejón-Ajlavir km 4,8 28850 Torrejón de Ardoz Madrid Spain
| | - Marta Ruiz-Bermejo
- Departamento de Evolución Molecular; Centro de Astrobiología (INTA-CSIC); Ctra. Torrejón-Ajlavir km 4,8 28850 Torrejón de Ardoz Madrid Spain
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40
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Perkins RJ, Kukharchuk A, Delcroix P, Shoemaker RK, Roeselová M, Cwiklik L, Vaida V. The Partitioning of Small Aromatic Molecules to Air–Water and Phospholipid Interfaces Mediated by Non-Hydrophobic Interactions. J Phys Chem B 2016; 120:7408-22. [DOI: 10.1021/acs.jpcb.6b05084] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Russell J. Perkins
- Department
of Chemistry and Biochemistry, University of Colorado at Boulder, UCB 215, Boulder, Colorado 80309, United States
- Cooperative
Institute for Research In Environmental Sciences, University of Colorado Boulder, UCV 215, Boulder, Colorado 80309, United States
| | - Alexandra Kukharchuk
- J. Heyrovský
Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Pauline Delcroix
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Richard K. Shoemaker
- Department
of Chemistry and Biochemistry, University of Colorado at Boulder, UCB 215, Boulder, Colorado 80309, United States
| | - Martina Roeselová
- Institute
of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nám. 2, 16610 Prague 6, Czech Republic
| | - Lukasz Cwiklik
- J. Heyrovský
Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejškova 3, 18223 Prague 8, Czech Republic
| | - Veronica Vaida
- Department
of Chemistry and Biochemistry, University of Colorado at Boulder, UCB 215, Boulder, Colorado 80309, United States
- Cooperative
Institute for Research In Environmental Sciences, University of Colorado Boulder, UCV 215, Boulder, Colorado 80309, United States
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41
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Gazit E. Metabolite amyloids: a new paradigm for inborn error of metabolism disorders. J Inherit Metab Dis 2016; 39:483-8. [PMID: 27271695 DOI: 10.1007/s10545-016-9946-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 05/02/2016] [Accepted: 05/04/2016] [Indexed: 01/09/2023]
Abstract
The formation of ordered amyloid assemblies is associated with major human degenerative disorders, including Alzheimer's disease, Parkinson's disease, and type 2 diabetes. Amyloid fibrils are elongated nanoscale structures that bind to specific dyes (including thioflavin T and Congo red). Amyloid fibrillar assemblies or their early intermediates are known to induce apoptotic cytotoxic effect. Until recently, amyloid fiber formation was observed only with proteins and peptides. We reported in 2012 that a single amino acid, phenylalanine, could also form typical amyloid fibrils with the same morphology, dye-binding specificity, and electron diffraction pattern as protein amyloids. X-ray crystallography demonstrated the formation of supramolecular β-sheet-like organization by phenylalanine at its zwitterionic form. Metabolite amyloids had pronounced cytotoxicity that could be depleted by treatment with antibodies raised against the phenylalanine structures. We suggested that the observed amyloid formation could explain some of the symptoms observed in phenylketonuria (PKU) upon the accumulation of phenylalanine. Follow-up studies by other groups revealed the ability of phenylalanine amyloids to bind to membranes, as observed with protein amyloids. Furthermore, the doxycycline amyloid formation inhibitor was shown to also affect the formation of phenylalanine amyloids. In 2015, it was reported that other metabolites involved in metabolic disorders, including adenine, uracil, tyrosine, and orotic acid, could form amyloid-like assemblies. It was further demonstrated that the assemblies induce apoptotic cell death. Taken together, we suggest a new hypothesis to understand the etiology of degenerative processes observed in inborn error of metabolism disorders and indicate new avenues for treatment.
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Affiliation(s)
- Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, 6997801, Israel.
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42
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Miles REH, Davies JF, Reid JP. The influence of the surface composition of mixed monolayer films on the evaporation coefficient of water. Phys Chem Chem Phys 2016; 18:19847-58. [DOI: 10.1039/c6cp03826c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The influence of mixed component organic surface films on the evaporation rate of water from an aqueous droplet is reported.
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Affiliation(s)
| | - James F. Davies
- School of Chemistry
- University of Bristol
- Bristol
- UK
- Chemical Sciences Division
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43
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Do TD, Kincannon WM, Bowers MT. Phenylalanine Oligomers and Fibrils: The Mechanism of Assembly and the Importance of Tetramers and Counterions. J Am Chem Soc 2015; 137:10080-3. [DOI: 10.1021/jacs.5b05482] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Thanh D. Do
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - William M. Kincannon
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
| | - Michael T. Bowers
- Department of Chemistry and
Biochemistry, University of California, Santa Barbara, California 93106-9510, United States
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