1
|
Skvortsova P, Valiullina Y, Baranova N, Faizullin D, Zuev Y, Ermakova E. Spectroscopic study of antimicrobial peptides: Structure and functional activity. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 264:120273. [PMID: 34425316 DOI: 10.1016/j.saa.2021.120273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/21/2021] [Accepted: 08/07/2021] [Indexed: 06/13/2023]
Abstract
Amphibians are a natural source of a large number of peptides with a wide range of functional activities. Here, a complex of spectroscopic methods including NMR-, FTIR-, CD-, and UV-spectroscopy was applied to characterize the structure and functional activity of megin-1, a peptide isolated from amphibian skin. The three-dimensional structure of two forms of the peptide was determined using solution NMR spectroscopy. Thermodynamic characteristics of the process of peptide transformation from linear to cyclic form were obtained. Antibacterial and antimycotic properties of the peptide, as well as its protease inhibitory activities, were analyzed.
Collapse
Affiliation(s)
- Polina Skvortsova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation
| | - Yuliya Valiullina
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation
| | - Natalia Baranova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation
| | - Dzhigangir Faizullin
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation
| | - Yuriy Zuev
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation
| | - Elena Ermakova
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, Lobachevsky Str., 2/31, Kazan 420111, Russian Federation.
| |
Collapse
|
2
|
Shen X, Huang C, Shinde S, Jagadeesan KK, Ekström S, Fritz E, Sellergren B. Catalytic Formation of Disulfide Bonds in Peptides by Molecularly Imprinted Microgels at Oil/Water Interfaces. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30484-30491. [PMID: 27750005 DOI: 10.1021/acsami.6b10131] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This work describes the preparation and investigation of molecularly imprinted polymer (MIP) microgel (MG) stabilized Pickering emulsions (PEs) for their ability to catalyze the formation of disulfide bonds in peptides at the O/W interface. The MIP MGs were synthesized via precipitation polymerization and a programmed initiator change strategy. The MIP MGs were characterized using DLS analysis, SEM measurement, and optical microscopy analysis. The dry and wet MIP MGs showed a hydrodynamic diameter of 100 and 280 nm, respectively. A template rebinding experiment showed that the MIP MGs bound over two times more template (24 mg g-1) compared to the uptake displayed by a nonimprinted reference polymer (NIP) MG (10 mg g-1) at saturation. Using the MIP MGs as stabilizers, catalytic oxidation systems were prepared by emulsifying the oil phase and water phase in the presence of different oxidizing agents. During the cyclization, the isolation of the thiol precursors and the oxidizing reagents nonselectively decreased the formation of the byproducts, while the imprinted cavities on the MIP MGs selectively promoted the intramolecular cyclization of peptides. When I2 was used as the oxidizing agent, the MIP-PE-I2 system showed a product yield of 50%, corresponding to a nearly 2-fold increase compared to that of the nonimprinted polymer NIP-PE-I2 system (26%). We believe the interfacial catalysis system presented in this work may offer significant benefits in synthetic peptide chemistry by raising productivity while suppressing the formation of byproducts.
Collapse
Affiliation(s)
- Xiantao Shen
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology , Hangkong Road #13, Wuhan, Hubei 430030, China
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
- G&T Septech AS , P.O. Box 33, 1917 Ytre Enebakk, Norway
| | - Chuixiu Huang
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
- School of Pharmacy, University of Oslo , P.O. Box 1068, 0316 Blindern Oslo, Norway
- G&T Septech AS , P.O. Box 33, 1917 Ytre Enebakk, Norway
| | - Sudhirkumar Shinde
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
| | | | - Simon Ekström
- Department of Biomedical Engineering, Lund University , 221 00 Lund, Sweden
| | - Emelie Fritz
- INFU, Technische Universität Dortmund , 44221 Dortmund, Germany
| | - Börje Sellergren
- Department of Biomedical Sciences, Faculty of Health and Society, Malmö University , SE20506 Malmö, Sweden
| |
Collapse
|
3
|
Rezaeianpour S, Bozorgi AH, Moghimi A, Almasi A, Balalaie S, Ramezanpour S, Nasoohi S, Mazidi SM, Geramifar P, Bitarafan-Rajabi A, Shahhosseini S. Synthesis and Biological Evaluation of Cyclic [99mTc]-HYNIC-CGPRPPC as a Fibrin-Binding Peptide for Molecular Imaging of Thrombosis and Its Comparison with [99mTc]-HYNIC-GPRPP. Mol Imaging Biol 2016; 19:256-264. [DOI: 10.1007/s11307-016-1004-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
4
|
Xia J, Bergseng E, Fleckenstein B, Siegel M, Kim CY, Khosla C, Sollid LM. Cyclic and dimeric gluten peptide analogues inhibiting DQ2-mediated antigen presentation in celiac disease. Bioorg Med Chem 2007; 15:6565-73. [PMID: 17681795 PMCID: PMC2034199 DOI: 10.1016/j.bmc.2007.07.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 07/06/2007] [Accepted: 07/09/2007] [Indexed: 01/28/2023]
Abstract
Celiac disease is an immune mediated enteropathy elicited by gluten ingestion. The disorder has a strong association with HLA-DQ2. This HLA molecule is involved in the disease pathogenesis by presenting gluten peptides to T cells. Blocking the peptide-binding site of DQ2 may be a way to treat celiac disease. In this study, two types of peptide analogues, modeled after natural gluten antigens, were studied as DQ2 blockers. (a) Cyclic peptides. Cyclic peptides containing the DQ2-alphaI gliadin epitope LQPFPQPELPY were synthesized with flanking cysteine residues introduced and subsequently crosslinked via a disulfide bond. Alternatively, cyclic peptides were prepared with stable polyethylene glycol bridges across internal lysine residues of modified antigenic peptides such as KQPFPEKELPY and LQLQPFPQPEKPYPQPEKPY. The effect of cyclization as well as the length of the spacer in the cyclic peptides on DQ2 binding and T cell recognition was analyzed. Inhibition of peptide-DQ2 recognition by the T cell receptor was observed in T cell proliferation assays. (b) Dimeric peptides. Previously we developed a new type of peptide blocker with much enhanced affinity for DQ2 by dimerizing LQLQPFPQPEKPYPQPELPY through the lysine side chains. Herein, the effect of linker length on both DQ2 binding and T cell inhibition was investigated. One dimeric peptide analogue with an intermediate linker length was found to be especially effective at inhibiting DQ2 mediated antigen presentation. The implications of these findings for the treatment of celiac disease are discussed.
Collapse
Affiliation(s)
- Jiang Xia
- Department of Chemistry, Stanford University, Stanford, USA
| | - Elin Bergseng
- Institute of Immunology, University of Oslo, Rikshospitalet-Radiumhospitalet Medical Center, Oslo, Norway
| | - Burkhard Fleckenstein
- Institute of Immunology, University of Oslo, Rikshospitalet-Radiumhospitalet Medical Center, Oslo, Norway
| | - Matthew Siegel
- Department of Chemical Engineering, Stanford University, Stanford, USA
| | - Chu-Young Kim
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Chaitan Khosla
- Department of Chemistry, Stanford University, Stanford, USA
- Department of Chemical Engineering, Stanford University, Stanford, USA
- Department of Biochemistry, Stanford University, Stanford, USA
- * Corresponding authors. Ludvig M. Sollid, Institute of Immunology, University of Oslo, Rikshospitalet-Radiumhospitalet Medical Center, N-0027 Oslo, Norway, Tel. +47 23073500; Fax. +47 23073510; E-mail: or Chaitan Khosla, Departments of Chemistry, Chemical Engineering and Biochemistry, Stanford University, Stanford, California 94305-5025, Tel. 650-723-6538; Fax.650-725-7294; E-mail:
| | - Ludvig M. Sollid
- Institute of Immunology, University of Oslo, Rikshospitalet-Radiumhospitalet Medical Center, Oslo, Norway
- * Corresponding authors. Ludvig M. Sollid, Institute of Immunology, University of Oslo, Rikshospitalet-Radiumhospitalet Medical Center, N-0027 Oslo, Norway, Tel. +47 23073500; Fax. +47 23073510; E-mail: or Chaitan Khosla, Departments of Chemistry, Chemical Engineering and Biochemistry, Stanford University, Stanford, California 94305-5025, Tel. 650-723-6538; Fax.650-725-7294; E-mail:
| |
Collapse
|
5
|
Matsoukas J, Apostolopoulos V, Kalbacher H, Papini AM, Tselios T, Chatzantoni K, Biagioli T, Lolli F, Deraos S, Papathanassopoulos P, Troganis A, Mantzourani E, Mavromoustakos T, Mouzaki A. Design and synthesis of a novel potent myelin basic protein epitope 87-99 cyclic analogue: enhanced stability and biological properties of mimics render them a potentially new class of immunomodulators. J Med Chem 2005; 48:1470-80. [PMID: 15743189 DOI: 10.1021/jm040849g] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A cyclic analogue, [cyclo(87-99)MBP(87)(-)(99)], of the human immunodominant MBP(87)(-)(99) epitope, was designed based on ROESY/NMR distance information and modeling data for linear epitope 87-99, taking into account T-cell (Phe(89), Lys(91), Pro(96)) and HLA (His(88), Phe(90), Ile(93)) contact side-chain information. The cyclic analogue was found to induce experimental allergic encephalomyelitis (EAE), to bind HLA-DR4, and to increase CD4 T-cell line proliferation, like that of the conformationally related linear MBP(87)(-)(99) epitope peptide. The mutant cyclic peptides, the cyclo(91-99)[Ala(96)]MBP(87)(-)(99) and the cyclo(87-99)[Arg(91)Ala(96)]MBP(87)(-)(99), reported previously for suppressing, to a varying degree, autoimmune encephalomyelitis in a rat animal model, were found in this study to possess the following immunomodulatory properties: (i) they suppressed the proliferation of a CD4 T-cell line raised from a multiple sclerosis patient, (ii) they scored the best in vitro TH2/TH1 cytokine ratio in peripheral blood mononuclear cell cultures derived from 13 multiple sclerosis patients, inducing IL-10 selectively, and (iii) they bound to HLA-DR4, first to be reported for cyclic MBP peptides. In addition, cyclic peptides were found to be more stable to lysosomal enzymes and Cathepsin B, D, and H, compared to their linear counterparts. Taken together, these data render cyclic mimics as putative drugs for treating multiple sclerosis and potentially other Th1-mediated autoimmune diseases.
Collapse
MESH Headings
- Adjuvants, Immunologic/chemical synthesis
- Adjuvants, Immunologic/chemistry
- Adjuvants, Immunologic/pharmacology
- Animals
- CD4-Positive T-Lymphocytes/cytology
- CD4-Positive T-Lymphocytes/drug effects
- Cell Line
- Cell Proliferation/drug effects
- Cyclization
- Cytokines/metabolism
- Drug Stability
- Encephalomyelitis, Autoimmune, Experimental/chemically induced
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Epitopes
- HLA-DR4 Antigen/metabolism
- Humans
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/metabolism
- Lysosomes/enzymology
- Models, Molecular
- Molecular Mimicry
- Multiple Sclerosis/blood
- Multiple Sclerosis/immunology
- Mutation
- Myelin Basic Protein/chemical synthesis
- Myelin Basic Protein/chemistry
- Myelin Basic Protein/pharmacology
- Peptide Fragments/chemistry
- Peptides, Cyclic/chemical synthesis
- Peptides, Cyclic/chemistry
- Peptides, Cyclic/pharmacology
- Protein Binding
- Rats
- Rats, Inbred Lew
- Th1 Cells/drug effects
- Th1 Cells/metabolism
- Th2 Cells/drug effects
- Th2 Cells/metabolism
Collapse
Affiliation(s)
- John Matsoukas
- Department of Chemistry, University of Patras, Patras 26500, Greece.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Webb AI, Aguilar MI, Purcell AW. Optimisation of peptide-based cytotoxic T-cell determinants using non-natural amino acids. ACTA ACUST UNITED AC 2003. [DOI: 10.1007/bf02442589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
7
|
Tselios T, Apostolopoulos V, Daliani I, Deraos S, Grdadolnik S, Mavromoustakos T, Melachrinou M, Thymianou S, Probert L, Mouzaki A, Matsoukas J. Antagonistic effects of human cyclic MBP(87-99) altered peptide ligands in experimental allergic encephalomyelitis and human T-cell proliferation. J Med Chem 2002; 45:275-83. [PMID: 11784132 DOI: 10.1021/jm0102147] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The immunodominant myelin basic protein (MBP) peptide comprising residues 87-99 is a self-antigen in multiple sclerosis (MS). In Lewis rats this epitope induces experimental allergic encephalomyelitis (EAE), a demyelinating disease of the central nervous system, and is a model of MS. Structure-activity studies have shown that Lys(91) and Pro(96) residues are important for encephalitogenicity. Replacement of Lys and/or Pro residues with Arg and/or Ala, respectively, results in suppression of EAE. A potent linear altered peptide ligand of the immunodominant sequence MBP(83-99) has been selected for clinical trial (Nat. Med. 2000, 6, 1167, 1176). In the present report, two cyclic analogues, cyclo(91-99)[Ala(96)]MBP(87-99) and cyclo(87-99)[Arg(91), Ala(96)]MBP(87-99) were designed by NMR and molecular modeling data on human MBP(87-99) epitope (Val(87)-His-Phe-Phe-Lys-Asn-Ile-Val-Thr-Pro-Arg-Thr-Pro(99)) and its linear antagonist peptide analogue [Arg(91), Ala(96)]MBP(87-99). These analogues (altered peptide ligands) inhibited EAE in Lewis rats and decreased inflammation in the spinal cord. In addition, the analogue cyclo(87-99)[Arg(91), Ala(96)]MBP(87-99) induced proliferation of human peripheral blood T-cells. These cyclic MBP(87-99) peptide analogues may lead to the design of potent antagonist mimetics for treating MS.
Collapse
Affiliation(s)
- Theodore Tselios
- Department of Chemistry, University of Patras, 26500 Patras, Greece
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Berezhkovskiy LM, Deshpande SV. On the requirement of oxidizing reagent for the formation of a disulfide bond. Biophys Chem 2001; 91:319-27. [PMID: 11551442 DOI: 10.1016/s0301-4622(01)00147-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cyclization of a peptide through the formation of a disulfide bond between the SH groups of cysteines on the N- and C-terminals of peptide was studied in degassed water solution under vacuum. Cyclization went to completion although the solution was oxygen deficient (the number of oxygen molecules available for the reaction was at least 16 times less than the number of peptide molecules). This result indicates that, contrary to the common assumption, disulfide bond formation does not necessarily require an oxidant (O(2), I(2), etc.) to occur.
Collapse
Affiliation(s)
- L M Berezhkovskiy
- Corixa Corporation, 600 Gateway Blvd., South San Francisco, CA 94080, USA.
| | | |
Collapse
|
9
|
Tselios T, Daliani I, Deraos S, Thymianou S, Matsoukas E, Troganis A, Gerothanassis I, Mouzaki A, Mavromoustakos T, Probert L, Matsoukas J. Treatment of experimental allergic encephalomyelitis (EAE) by a rationally designed cyclic analogue of myelin basic protein (MBP) epitope 72-85. Bioorg Med Chem Lett 2000; 10:2713-7. [PMID: 11133075 DOI: 10.1016/s0960-894x(00)00556-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In this report the rational design, synthesis and pharmacological properties of an amide-linked cyclic antagonist analogue of the guinea pig myelin basic protein epitope MBP(72-85) are described. Design of the potent cyclic analogue was based on 2D NOESY nuclear magnetic resonance and molecular dynamics studies carried out in the linear antagonist Ala81MBP(72-85). The cyclic antagonist completely prevented the induction of experimental allergic/autoimmune encephalomyelitis when coinjected with linear and cyclic agonist analogues MBP(72-85) and cyclo(2-9)MBP(72-85).
Collapse
MESH Headings
- Animals
- Drug Design
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Encephalomyelitis, Autoimmune, Experimental/prevention & control
- Epitopes/administration & dosage
- Epitopes/pharmacology
- Guinea Pigs
- Immunization
- Models, Molecular
- Myelin Basic Protein/chemical synthesis
- Myelin Basic Protein/immunology
- Myelin Basic Protein/pharmacology
- Nuclear Magnetic Resonance, Biomolecular
- Peptide Fragments/chemical synthesis
- Peptide Fragments/immunology
- Peptide Fragments/pharmacology
- Peptides, Cyclic/chemical synthesis
- Peptides, Cyclic/immunology
- Peptides, Cyclic/pharmacology
- Rats
- Rats, Inbred Lew
- Spinal Cord/drug effects
- Spinal Cord/pathology
Collapse
Affiliation(s)
- T Tselios
- Department of Chemistry, University of Patras, Greece
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Tamilarasu N, Huq I, Rana TM. Design, synthesis, and biological activity of a cyclic peptide: an inhibitor of HIV-1 tat-TAR interactions in human cells. Bioorg Med Chem Lett 2000; 10:971-4. [PMID: 10853671 DOI: 10.1016/s0960-894x(00)00140-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Replication of human immunodeficiency virus type 1 (HIV-1) requires specific interactions of Tat protein with the transactivation responsive region (TAR) RNA, a 59-base stem-loop structure located at the 5'-end of all HIV mRNAs. A number of cyclic peptides are known to possess antibiotic activity and increased biological stability. Here we report the design, synthesis, and biological activity of a cyclic peptide (2), which inhibits transcriptional activation by Tat protein in human cells with an IC50 of approximately 40 nM. Cyclic peptides that can target specific RNA structures provide a new class of small molecules that can be used to control cellular processes involving RNA-protein interactions in vivo.
Collapse
Affiliation(s)
- N Tamilarasu
- Department of Pharmacology, Robert Wood Johnson Medical School, and Molecular Biosciences Graduate Program at Rutgers State University, Piscataway, NJ 08854, USA
| | | | | |
Collapse
|