1
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Dhuri K, Duran T, Chaudhuri B, Slack FJ, Vikram A, Glazer PM, Bahal R. Head-to-head comparison of in vitro and in vivo efficacy of pHLIP-conjugated anti-seed gamma peptide nucleic acids. CELL REPORTS. PHYSICAL SCIENCE 2023; 4:101584. [PMID: 38144419 PMCID: PMC10745205 DOI: 10.1016/j.xcrp.2023.101584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
Gamma peptide nucleic acids (γPNAs) have recently garnered attention in diverse therapeutic and diagnostic applications. Serine and diethylene-glycol-containing γPNAs have been tested for numerous RNA-targeting purposes. Here, we comprehensively evaluated the in vitro and in vivo efficacy of pH-low insertion peptide (pHLIP)-conjugated serine and diethylene-based γPNAs. pHLIP targets only the acidic tumor microenvironment and not the normal cells. We synthesized and parallelly tested pHLIP-serine γPNAs and pHLIP-diethylene glycol γPNAs that target the seed region of microRNA-155, a microRNA that is upregulated in various cancers. We performed an all-atom molecular dynamics simulation-based computational study to elucidate the interaction of pHLIP-γPNA constructs with the lipid bilayer. We also determined the biodistribution and efficacy of the pHLIP constructs in the U2932-derived xenograft model. Overall, we established that the pHLIP-serine γPNAs show superior results in vivo compared with the pHLIP-diethylene glycol-based γPNA.
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Affiliation(s)
- Karishma Dhuri
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Tibo Duran
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Bodhisattwa Chaudhuri
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA
- Department of Chemical & Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Frank J. Slack
- HMS Initiative for RNA Medicine, Department of Pathology, BIDMC Cancer Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, USA
| | - Ajit Vikram
- Department of Internal Medicine, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Peter M. Glazer
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Raman Bahal
- Department of Pharmaceutical Sciences, University of Connecticut, Storrs, CT 06269, USA
- Lead contact
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2
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Ouyang J, Sheng Y, Wang W. Recent Advances of Studies on Cell-Penetrating Peptides Based on Molecular Dynamics Simulations. Cells 2022; 11:cells11244016. [PMID: 36552778 PMCID: PMC9776715 DOI: 10.3390/cells11244016] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 12/14/2022] Open
Abstract
With the ability to transport cargo molecules across cell membranes with low toxicity, cell-penetrating peptides (CPPs) have become promising candidates for next generation peptide-based drug delivery vectors. Over the past three decades since the first CPP was discovered, a great deal of work has been done on the cellular uptake mechanisms and the applications for the delivery of therapeutic molecules, and significant advances have been made. But so far, we still do not have a precise and unified understanding of the structure-activity relationship of the CPPs. Molecular dynamics (MD) simulations provide a method to reveal peptide-membrane interactions at the atomistic level and have become an effective complement to experiments. In this paper, we review the progress of the MD simulations on CPP-membrane interactions, including the computational methods and technical improvements in the MD simulations, the research achievements in the CPP internalization mechanism, CPP decoration and coupling, and the peptide-induced membrane reactions during the penetration process, as well as the comparison of simulated and experimental results.
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Affiliation(s)
- Jun Ouyang
- School of Public Courses, Bengbu Medical College, Bengbu 233030, China
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China
| | - Yuebiao Sheng
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China
- High Performance Computing Center, Nanjing University, Nanjing 210093, China
- Correspondence: (Y.S.); (W.W.)
| | - Wei Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing 210093, China
- Correspondence: (Y.S.); (W.W.)
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3
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Sharma GP, Meyer AC, Habeeb S, Karbach M, Müller G. Free-energy landscapes and insertion pathways for peptides in membrane environment. Phys Rev E 2022; 106:014404. [PMID: 35974613 DOI: 10.1103/physreve.106.014404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
Free-energy landscapes for short peptides-specifically for variants of the pH low insertion peptide (pHLIP)-in the heterogeneous environment of a lipid bilayer or cell membrane are constructed, taking into account a set of dominant interactions and the conformational preferences of the peptide backbone. Our methodology interprets broken internal H-bonds along the backbone of a polypeptide as statistically interacting quasiparticles, activated from the helix reference state. The favored conformation depends on the local environment (ranging from polar to nonpolar), specifically on the availability of external H-bonds (with H_{2}O molecules or lipid headgroups) to replace internal H-bonds. The dominant side-chain contribution is accounted for by residue-specific transfer free energies between polar and nonpolar environments. The free-energy landscape is sensitive to the level of pH in the aqueous environment surrounding the membrane. For high pH, we identify pathways of descending free energy that suggest a coexistence of membrane-adsorbed peptides with peptides in solution. A drop in pH raises the degree of protonation of negatively charged residues and thus increases the hydrophobicity of peptide segments near the C terminus. For low pH, we identify insertion pathways between the membrane-adsorbed state and a stable trans-membrane state with the C terminus having crossed the membrane.
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Affiliation(s)
- Ganga P Sharma
- Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881, USA
| | - Aaron C Meyer
- Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881, USA
| | - Suhail Habeeb
- Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881, USA
| | - Michael Karbach
- Fachgruppe Physik, Bergische Universität Wuppertal, D-42097 Wuppertal, Germany
| | - Gerhard Müller
- Department of Physics, University of Rhode Island, Kingston, Rhode Island 02881, USA
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4
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Kalathingal M, Sumikama T, Oiki S, Saito S. Vectorial insertion of a β-helical peptide into membrane: a theoretical study on polytheonamide B. Biophys J 2021; 120:4786-4797. [PMID: 34555359 DOI: 10.1016/j.bpj.2021.09.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 09/07/2021] [Accepted: 09/15/2021] [Indexed: 10/20/2022] Open
Abstract
Spontaneous unidirectional, or vectorial, insertion of transmembrane peptides is a fundamental biophysical process for toxin and viral actions. Polytheonamide B (pTB) is a potent cytotoxic peptide with a β6.3-helical structure. Previous experimental studies revealed that the pTB inserts into the membrane in a vectorial fashion and forms a channel with its single molecular length long enough to span the membrane. Also, molecular dynamics simulation studies demonstrated that the pTB is prefolded in aqueous solution. These are unique features of pTB because most of the peptide toxins form channels through oligomerization of transmembrane helices. Here, we performed all-atom molecular dynamics simulations to examine the dynamic mechanism of the vectorial insertion of pTB, providing underlying elementary processes of the membrane insertion of a prefolded single transmembrane peptide. We find that the insertion of pTB proceeds with only the local lateral compression of the membrane in three successive phases: "landing," "penetration," and "equilibration" phases. The free energy calculations using the replica-exchange umbrella sampling simulations present an energy cost of 4.3 kcal/mol at the membrane surface for the membrane insertion of pTB from bulk water. The trajectories of membrane insertion revealed that the insertion process can occur in two possible pathways, namely "trapped" and "untrapped" insertions; in some cases, pTB is trapped in the upper leaflet during the penetration phase. Our simulations demonstrated the importance of membrane anchoring by the hydrophobic N-terminal blocking group in the landing phase, leading to subsequent vectorial insertion.
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Affiliation(s)
- Mahroof Kalathingal
- School of Physical Sciences, The Graduate University for Advanced Studies, Okazaki, Japan
| | - Takashi Sumikama
- PRESTO, JST, Kawaguchi, Japan; Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kanazawa, Japan
| | - Shigetoshi Oiki
- Biomedical Imaging Research Center, University of Fukui, Fukui, Japan.
| | - Shinji Saito
- School of Physical Sciences, The Graduate University for Advanced Studies, Okazaki, Japan; Institute for Molecular Science, Okazaki, Japan.
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5
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Reshetnyak YK, Moshnikova A, Andreev OA, Engelman DM. Targeting Acidic Diseased Tissues by pH-Triggered Membrane-Associated Peptide Folding. Front Bioeng Biotechnol 2020; 8:335. [PMID: 32411684 PMCID: PMC7198868 DOI: 10.3389/fbioe.2020.00335] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 03/26/2020] [Indexed: 12/19/2022] Open
Abstract
The advantages of targeted therapy have motivated many efforts to find distinguishing features between the molecular cell surface landscapes of diseased and normal cells. Typically, the features have been proteins, lipids or carbohydrates, but other approaches are emerging. In this discussion, we examine the use of cell surface acidity as a feature that can be exploited by using pH-sensitive peptide folding to target agents to diseased cell surfaces or cytoplasms.
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Affiliation(s)
- Yana K Reshetnyak
- Department of Physics, The University of Rhode Island, Kingston, RI, United States
| | - Anna Moshnikova
- Department of Physics, The University of Rhode Island, Kingston, RI, United States
| | - Oleg A Andreev
- Department of Physics, The University of Rhode Island, Kingston, RI, United States
| | - Donald M Engelman
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, United States
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6
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Bai C, Lao Z, Chen Y, Tang Y, Wei G. Pristine and Hydroxylated Fullerenes Prevent the Aggregation of Human Islet Amyloid Polypeptide and Display Different Inhibitory Mechanisms. Front Chem 2020; 8:51. [PMID: 32117877 PMCID: PMC7013002 DOI: 10.3389/fchem.2020.00051] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/16/2020] [Indexed: 01/08/2023] Open
Abstract
Protein aggregation, involving the formation of dimers, oligomers, and fibrils, is associated with many human diseases. Type 2 diabetes is one of the common amyloidosis and linked with the aggregation of human islet amyloid polypeptide (hIAPP). A series of nanoparticles are reported to be able to interact with proteins and enhance/inhibit protein aggregation. However, the effects of C60 (a model system of hydrophobic nanoparticle) and C60(OH)8 (a hydroxylated fullerene) on hIAPP aggregation remain unknown. In this study, we investigate the influences of pristine fullerene C60 and hydroxylated C60 on the dimerization of hIAPP using molecular dynamics (MD) simulations. Extensive replica exchange molecular dynamics (REMD) simulations show that isolated hIAPP dimers adopt β-sheet structure containing the amyloid-precursor (β-hairpin). Both C60 and C60(OH)8 notably inhibit the β-sheet formation of hIAPP dimer and induce the formation of collapsed disordered coil-rich conformations. Protein—nanoparticle interaction analyses reveal that the inhibition of hIAPP aggregation by C60 is mainly via hydrophobic and aromatic-stacking interactions, while the prevention of hIAPP aggregation by C60(OH)8 is mostly through collective hydrogen bonding and aromatic-stacking interactions. Conventional MD simulations indicate that both C60 and C60(OH)8 weaken the interactions within hIAPP protofibril and disrupt the β-sheet structure. These results provide mechanistic insights into the possible inhibitory mechanism of C60 and C60(OH)8 toward hIAPP aggregation, and they are of great reference value for the screening of potent amyloid inhibitors.
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Affiliation(s)
- Cuiqin Bai
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education), Department of Physics, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
| | - Zenghui Lao
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education), Department of Physics, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
| | - Yujie Chen
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education), Department of Physics, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
| | - Yiming Tang
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education), Department of Physics, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
| | - Guanghong Wei
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education), Department of Physics, Multiscale Research Institute of Complex Systems, Fudan University, Shanghai, China
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7
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Bai C, Lin D, Mo Y, Lei J, Sun Y, Xie L, Yang X, Wei G. Influence of fullerenol on hIAPP aggregation: amyloid inhibition and mechanistic aspects. Phys Chem Chem Phys 2019; 21:4022-4031. [DOI: 10.1039/c8cp07501h] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
C60(OH)24inhibits hIAPP aggregation by suppressing the fibril-prone structure and destabilizes hIAPP protofibrils by binding to the amyloid core region.
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Affiliation(s)
- Cuiqin Bai
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Dongdong Lin
- Department of Microelectronic Science and Engineering Science Faculty of Science
- Ningbo University
- Ningbo 315211
- P. R. China
| | - Yuxiang Mo
- College of Physical Science and Technology
- Guangxi Normal University
- 15 Yucai Road
- Guilin
- China
| | - Jiangtao Lei
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Yunxiang Sun
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Luogang Xie
- College of Physics and Electronic Engineering
- Zhengzhou University of Light Industry
- Zhengzhou 453002
- People's Republic of China
| | - Xinju Yang
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
| | - Guanghong Wei
- Department of Physics
- State Key Laboratory of Surface Physics, and Key Laboratory for Computational Physical Science (Ministry of Education)
- Fudan University
- Shanghai 200433
- People's Republic of China
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8
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Gupta C, Ren Y, Mertz B. Cooperative Nonbonded Forces Control Membrane Binding of the pH-Low Insertion Peptide pHLIP. Biophys J 2018; 115:2403-2412. [PMID: 30503536 DOI: 10.1016/j.bpj.2018.11.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/10/2018] [Accepted: 11/01/2018] [Indexed: 02/06/2023] Open
Abstract
Peptides with the ability to bind and insert into the cell membrane have immense potential in biomedical applications. pH (low) insertion peptide (pHLIP), a water-soluble polypeptide derived from helix C of bacteriorhodopsin, can insert into a membrane at acidic pH to form a stable transmembrane α-helix. The insertion process takes place in three stages: pHLIP is unstructured and soluble in water at neutral pH (state I), unstructured and bound to the surface of a membrane at neutral pH (state II), and inserted into the membrane as an α-helix at low pH (state III). Using molecular dynamics simulations, we have modeled state II of pHLIP and a fast-folding variant of pHLIP, in which each peptide is bound to a 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine bilayer surface. Our results provide strong support for recently published spectroscopic studies, namely that pHLIP preferentially binds to the bilayer surface as a function of location of anionic amino acids and that backbone dehydration occurs upon binding. Unexpectedly, we also observed several instances of segments of pHLIP folding into a stable helical turn. Our results provide a molecular level of detail that is essential to providing new insights into pHLIP function and to facilitate design of variants with improved membrane-active capabilities.
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Affiliation(s)
- Chitrak Gupta
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia
| | - Yue Ren
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia
| | - Blake Mertz
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia.
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9
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Vila-Viçosa D, Silva TFD, Slaybaugh G, Reshetnyak YK, Andreev OA, Machuqueiro M. Membrane-Induced p K a Shifts in wt-pHLIP and Its L16H Variant. J Chem Theory Comput 2018; 14:3289-3297. [PMID: 29733633 DOI: 10.1021/acs.jctc.8b00102] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The pH (low) insertion peptides (pHLIPs) is a family of peptides that are able to insert into a lipid bilayer at acidic pH. The molecular mechanism of pHLIPs insertion, folding, and stability in the membrane at low pH is based on multiple protonation events, which are challenging to study at the molecular level. More specifically, the relation between the experimental p K of insertion (p Kexp) of pHLIPs and the p Ka of the key residues is yet to be clarified. We carried out a computational study, complemented with new experimental data, and established the influence of (de)protonation of titrable residues on the stability of the peptide membrane-inserted state. Constant-pH molecular dynamics simulations were employed to calculate the p Ka values of these residues along the membrane normal. In the wt-pHLIP, we identified Asp14 as the key residue for the stability of the membrane-inserted state, and its p Ka value is strongly correlated with the experimental p Kexp measured in thermodynamics studies. Also, in order to narrow down the pH range at which pHLIP is stable in the membrane, we designed a new pHLIP variant, L16H, where Leu in the 16th position was replaced by a titrable His residue. Our results showed that the L16H variant undergoes two transitions. The calculated p Ka and experimentally observed p Kexp values are in good agreement. Two distinct p Kexp values delimit a pH range where the L16H peptide is stably inserted in the membrane, while, outside this range, the membrane-inserted state is destabilized and the peptide exits from the bilayer. pHLIP peptides have been successfully used to target cancer cells for the delivery of diagnostics and therapeutic agents to acidic tumors. The fine-tuning of the stability of the pHLIP inserted state and its restriction to a narrow well-defined pH range might allow the design of new peptides, able to discriminate between tissues with different extracellular pH values.
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Affiliation(s)
- Diogo Vila-Viçosa
- Centro de Química e Bioquímica, BioISI: Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade de Lisboa , 1749-016 Lisboa , Portugal
| | - Tomás F D Silva
- Centro de Química e Bioquímica, BioISI: Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade de Lisboa , 1749-016 Lisboa , Portugal
| | - Gregory Slaybaugh
- Department of Physics , University of Rhode Island , 2 Lippitt Road , Kingston , Rhode Island 02881 , United States
| | - Yana K Reshetnyak
- Department of Physics , University of Rhode Island , 2 Lippitt Road , Kingston , Rhode Island 02881 , United States
| | - Oleg A Andreev
- Department of Physics , University of Rhode Island , 2 Lippitt Road , Kingston , Rhode Island 02881 , United States
| | - Miguel Machuqueiro
- Centro de Química e Bioquímica, BioISI: Biosystems and Integrative Sciences Institute, Departamento de Química e Bioquímica, Faculdade de Ciências , Universidade de Lisboa , 1749-016 Lisboa , Portugal
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10
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Li ZL, Ding HM, Ma YQ. Interaction of peptides with cell membranes: insights from molecular modeling. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:083001. [PMID: 26828575 DOI: 10.1088/0953-8984/28/8/083001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The investigation of the interaction of peptides with cell membranes is the focus of active research. It can enhance the understanding of basic membrane functions such as membrane transport, fusion, and signaling processes, and it may shed light on potential applications of peptides in biomedicine. In this review, we will present current advances in computational studies on the interaction of different types of peptides with the cell membrane. Depending on the properties of the peptide, membrane, and external environment, the peptide-membrane interaction shows a variety of different forms. Here, on the basis of recent computational progress, we will discuss how different peptides could initiate membrane pores, translocate across the membrane, induce membrane endocytosis, produce membrane curvature, form fibrils on the membrane surface, as well as interact with functional membrane proteins. Finally, we will present a conclusion summarizing recent progress and providing some specific insights into future developments in this field.
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Affiliation(s)
- Zhen-lu Li
- National Laboratory of Solid State Microstructures and Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China
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11
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Yue T, Sun M, Zhang S, Ren H, Ge B, Huang F. How transmembrane peptides insert and orientate in biomembranes: a combined experimental and simulation study. Phys Chem Chem Phys 2016; 18:17483-94. [DOI: 10.1039/c6cp01133k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
After the synthesis of transmembrane peptides/proteins (TMPs), their insertion into a lipid bilayer is a fundamental biophysical process.
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Affiliation(s)
- Tongtao Yue
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Mingbin Sun
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Shuai Zhang
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Hao Ren
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Baosheng Ge
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
| | - Fang Huang
- State Key Laboratory of Heavy Oil Processing
- Center for Bioengineering and Biotechnology
- China University of Petroleum (East China)
- Qingdao
- China
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12
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Deacon JC, Engelman DM, Barrera FN. Targeting acidity in diseased tissues: mechanism and applications of the membrane-inserting peptide, pHLIP. Arch Biochem Biophys 2014; 565:40-8. [PMID: 25444855 DOI: 10.1016/j.abb.2014.11.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 10/30/2014] [Accepted: 11/04/2014] [Indexed: 12/24/2022]
Abstract
pHLIPs are a family of soluble ∼36 amino acid peptides, which bind to membrane surfaces. If the environment is acidic, a pHLIP folds and inserts across the membrane to form a stable transmembrane helix, thus preferentially locating itself in acidic tissues. Since tumors and other disease tissues are acidic, pHLIPs' low-pH targeting behavior leads to applications as carriers for diagnostic and surgical imaging agents. The energy of membrane insertion can also be used to promote the insertion of modestly polar, normally cell-impermeable cargos across the cell membrane into the cytosol of targeted cells, leading to applications in tumor-targeted delivery of therapeutic molecules. We review the biochemical and biophysical basis of pHLIPs' unique properties, diagnostic and therapeutic applications, and the principles upon which translational applications are being developed.
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Affiliation(s)
- John C Deacon
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Donald M Engelman
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA
| | - Francisco N Barrera
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, TN 37996, USA.
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13
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Zhu Z, Sheng N, Wan R, Fang H. Intrinsic Autocorrelation Time of Picoseconds for Thermal Noise in Water. J Phys Chem A 2014; 118:8936-41. [DOI: 10.1021/jp5009785] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Zhi Zhu
- Division of Interfacial
Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100080, China
| | - Nan Sheng
- Division of Interfacial
Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China
- University of Chinese Academy of Sciences, Beijing 100080, China
| | - Rongzheng Wan
- Division of Interfacial
Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China
| | - Haiping Fang
- Division of Interfacial
Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, P.O. Box 800-204, Shanghai 201800, China
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14
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Bilayer surface association of the pHLIP peptide promotes extensive backbone desolvation and helically-constrained structures. Biophys Chem 2014; 187-188:1-6. [DOI: 10.1016/j.bpc.2013.12.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 11/15/2013] [Accepted: 12/15/2013] [Indexed: 01/23/2023]
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