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Han Z, Migheli Q, Kong Q. Fusion Expression of Peptides with AflR Binuclear Zinc Finger Motif and Their Enhanced Inhibition of Aspergillus flavus: A Study of Engineered Antimicrobial Peptides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:13360-13370. [PMID: 38830379 DOI: 10.1021/acs.jafc.4c01259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
This study reports a peptide design model for engineering fusion-expressed antimicrobial peptides (AMPs) with the AflR dinuclear zinc finger motif to improve the defense against aflatoxins and Aspergillus flavus. The study identified AflR, a Zn2Cys6-type sequence-specific DNA-binding protein, as a key player in the regulation of aflatoxin biosynthesis. By integrating the AflR motif into AMPs, we demonstrate that these novel fusion peptides significantly lower the minimum inhibitory concentrations (MICs) and reduce aflatoxin B1 and B2 levels, outperforming traditional AMPs. Comprehensive analysis, including bioinformatics and structural determination, elucidates the enhanced structure-function relationship underlying their efficacy. Furthermore, the study reveals the possibility that the fusion peptides have the potential to bind to the DNA binding sites of transcriptional regulators, binding DNA sites of key transcriptional regulators, thereby inhibiting genes critical for aflatoxin production. This research not only deepens our understanding of aflatoxin inhibition mechanisms but also presents a promising avenue for developing advanced antifungal agents, which are essential for global food safety and crop protection.
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Affiliation(s)
- Zhuoyu Han
- College of Food Science and Engineering, Ocean University of China, Qingdao 266000, China
| | - Quirico Migheli
- Dipartimento di Agraria and Nucleo di Ricerca sulla Desertificazione, Università degli Studi di Sassari, Sassari 07100, Italy
| | - Qing Kong
- College of Food Science and Engineering, Ocean University of China, Qingdao 266000, China
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2
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Kannoth S, Ali N, Prasanth GK, Arvind K, Mohany M, Hembrom PS, Sadanandan S, Vasu DA, Grace T. Transcriptome analysis of Corvus splendens reveals a repertoire of antimicrobial peptides. Sci Rep 2023; 13:18728. [PMID: 37907616 PMCID: PMC10618271 DOI: 10.1038/s41598-023-45875-w] [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: 06/23/2023] [Accepted: 10/25/2023] [Indexed: 11/02/2023] Open
Abstract
Multidrug resistance has become a global health problem associated with high morbidity and mortality. Antimicrobial peptides have been acknowledged as potential leads for prospective anti-infectives. Owing to their scavenging lifestyle, Corvus splendens is thought to have developed robust immunity to pathogens found in their diet, implying that they have evolved mechanisms to resist infection. In the current study, the transcriptome of C. splendens was sequenced, and de novo assembled to identify the presence of antimicrobial peptide genes. 72.09 million high-quality clean reads were obtained which were then de novo assembled into 3,43,503 transcripts and 74,958 unigenes. About 37,559 unigenes were successfully annotated using SwissProt, Pfam, GO, and KEGG databases. A search against APD3, CAMPR3 and LAMP databases identified 63 AMP candidates belonging to more than 20 diverse families and functional classes. mRNA of AvBD-2, AvBD-13 and CATH-2 were found to be differentially expressed between the three tested crows as well as among the tissues. We also characterized Corvus Cathelicidin 2 (CATH-2) to gain knowledge of its antimicrobial mechanisms. The CD spectroscopy of synthesized mature Corvus CATH-2 peptide displayed an amphipathic α-helical structure. Though the synthetic CATH-2 caused hemolysis of human RBC, it also exhibited antimicrobial activity against E. coli, S. aureus, and B. cereus. Docking simulation results revealed that this peptide could bind to the LPS binding site of MD-2, which may prevent LPS from entering the MD-2 binding pocket, and trigger TLR4 signaling pathway. The Corvus CATH-2 characterized in this study could aid in the development of novel therapeutics.
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Affiliation(s)
- Shalini Kannoth
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India
| | - Nemat Ali
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Ganesh K Prasanth
- Department of Biochemistry and Molecular Biology, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India
| | - Kumar Arvind
- Neurogenetics Branch, National Institute of Neurological Disorder and Stroke, National Institute of Health, Bethesda, MD, 20892, USA
| | - Mohamed Mohany
- Department of Pharmacology and Toxicology, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Preety Sweta Hembrom
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India
| | - Shemmy Sadanandan
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India
| | - Deepa Azhchath Vasu
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India
| | - Tony Grace
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Kasaragod, Kerala, India.
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3
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Eslami SM, Rahman IR, van der Donk WA. Expression of Lanthipeptides in Human Cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.19.563208. [PMID: 37961259 PMCID: PMC10634679 DOI: 10.1101/2023.10.19.563208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Cyclic peptides represent a burgeoning area of interest in therapeutic and biotechnological research. In opposition to their linear counterparts, cyclic peptides, such as certain ribosomally synthesized and post-translationally modified peptides (RiPPs), are more conformationally constrained and less susceptible to proteolytic degradation. The lanthipeptide RiPP cytolysin L forms a covalently enforced helical structure that may be used to disrupt helical interactions at protein-protein interfaces. Herein, an expression system is reported to produce lanthipeptides and structurally diverse cytolysin L derivatives in mammalian cells. Successful targeting of lanthipeptides to the nucleus is demonstrated. In vivo expression and targeting of such peptides in mammalian cells may allow for screening of lanthipeptide inhibitors of native protein-protein interactions.
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Affiliation(s)
- Sara M. Eslami
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Imran R. Rahman
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
| | - Wilfred A. van der Donk
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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4
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Lin WC, Chen YR, Chuang CM, Chen JY. A Cationic Amphipathic Tilapia Piscidin 4 Peptide-Based Antimicrobial Formulation Promotes Eradication of Bacterial Vaginosis-Associated Bacterial Biofilms. Front Microbiol 2022; 13:806654. [PMID: 35444633 PMCID: PMC9015711 DOI: 10.3389/fmicb.2022.806654] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
Bacterial vaginosis (BV) is prevalent among women of reproductive age and has a high rate of recurrence, which can be largely attributed to ineffective BV biofilm eradication by current first-line antibiotics. In this study, we report that the Nile tilapia piscidin 4 (TP4) exhibits broad-spectrum antimicrobial and antibiofilm activity against BV-associated bacteria, but not beneficial lactobacilli. In addition, BV-associated Gardnerella vaginalis remains susceptible to TP4 even after continual exposure to the peptide for up to 22 passages. Gardnerella vaginalis and Streptococcus anginosus are both biofilm-forming BV-associated bacteria, and we found that combining TP4 peptide and disodium EDTA with the biofilm-disrupting agent, chitosan, can eradicate biofilms formed by single or mixed G. vaginalis and S. anginosus. In addition, long-term storage of TP4 peptide in chitosan did not diminish its bactericidal activity toward G. vaginalis. Preformulation studies were performed using High performance liquid chromatography (HPLC) and Circular Dichroism (CD). The long-term stability of TP4 peptide was assessed under various conditions, such as different temperatures and ionic strengths, and in the presence of H2O2 and lactic acid. When exposed to sodium dodecyl sulfate (SDS), TP4 maintained its secondary structure at various temperatures, salt and disodium EDTA concentrations. Furthermore, the TP4 microbicide formulation significantly reduced the colonization density of BV-associated bacteria in mice infected with single or mixed bacteria (G. vaginalis and S. anginosus). The TP4 microbicide formulation showed biocompatibility with beneficial human vaginal lactobacilli and female reproductive tissues in C57BL/6 mice. These results suggest that the TP4 microbicide formulation could be a promising topical microbicide agent for BV treatment.
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Affiliation(s)
- Wen-Chun Lin
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Taiwan
| | - Yun-Ru Chen
- Academia Sinica Protein Clinic, Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chi-Mu Chuang
- College of Nursing, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan
- Department of Obstetrics and Gynecology, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jyh-Yih Chen
- Marine Research Station, Institute of Cellular and Organismic Biology, Academia Sinica, Jiaushi, Taiwan
- *Correspondence: Jyh-Yih Chen,
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5
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Ramazi S, Mohammadi N, Allahverdi A, Khalili E, Abdolmaleki P. A review on antimicrobial peptides databases and the computational tools. Database (Oxford) 2022; 2022:6550847. [PMID: 35305010 PMCID: PMC9216472 DOI: 10.1093/database/baac011] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 02/04/2022] [Accepted: 02/28/2022] [Indexed: 12/29/2022]
Abstract
Antimicrobial Peptides (AMPs) have been considered as potential alternatives for infection therapeutics since antibiotic resistance has been raised as a global problem. The AMPs are a group of natural peptides that play a crucial role in the immune system in various organisms AMPs have features such as a short length and efficiency against microbes. Importantly, they have represented low toxicity in mammals which makes them potential candidates for peptide-based drugs. Nevertheless, the discovery of AMPs is accompanied by several issues which are associated with labour-intensive and time-consuming wet-lab experiments. During the last decades, numerous studies have been conducted on the investigation of AMPs, either natural or synthetic type, and relevant data are recently available in many databases. Through the advancement of computational methods, a great number of AMP data are obtained from publicly accessible databanks, which are valuable resources for mining patterns to design new models for AMP prediction. However, due to the current flaws in assessing computational methods, more interrogations are warranted for accurate evaluation/analysis. Considering the diversity of AMPs and newly reported ones, an improvement in Machine Learning algorithms are crucial. In this review, we aim to provide valuable information about different types of AMPs, their mechanism of action and a landscape of current databases and computational tools as resources to collect AMPs and beneficial tools for the prediction and design of a computational model for new active AMPs.
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Affiliation(s)
- Shahin Ramazi
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14115-111, Iran
| | - Neda Mohammadi
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Hemmat Highway, Tehran 1449614535, Iran,Institute of Pharmacology and Toxicology, University of Bonn, Biomedical Center, Venusberg Campus 1, Bonn 53127, Germany
| | - Abdollah Allahverdi
- Department of Biophysics, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14115-111, Iran
| | - Elham Khalili
- Department of Plant Biology, Faculty of Biological Sciences, Tarbiat Modares University, Jalal Ale Ahmad Highway, Tehran 14115-111, Iran
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6
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Gimenez-Dejoz J, Numata K. Molecular dynamics study of the internalization of cell-penetrating peptides containing unnatural amino acids across membranes. NANOSCALE ADVANCES 2022; 4:397-407. [PMID: 36132688 PMCID: PMC9419563 DOI: 10.1039/d1na00674f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 11/10/2021] [Indexed: 06/16/2023]
Abstract
Peptide-based delivery systems that deliver target molecules into cells have been gaining traction. These systems need cell-penetrating peptides (CPPs), which have the remarkable ability to penetrate into biological membranes and help internalize different cargoes into cells through the cell membranes. The molecular internalization mechanism and structure-function relationships of CPPs are not clear, although the incorporation of nonproteinogenic amino acids such as α-aminoisobutyric acid (Aib) has been reported to increase their helicity, biostability and penetration efficiencies. Here, we used molecular dynamics to study two Aib-containing CPPs, poly(LysAibAla)3 (KAibA) and poly(LysAibGly)3 (KAibG), that previously showed high cell internalization efficiency. KAibA and KAibG displayed the lowest internalization energies among the studied CPPs, showing distinct internalization mechanisms depending on the lipid composition of the model membranes. The presence of Aib residues allows these CPPs to adopt amphipathic folding to efficiently penetrate through the membranes. Elucidating how Aib incorporation affects CPP-membrane binding and interactions is beneficial for the design of CPPs for efficient intracellular delivery.
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Affiliation(s)
- Joan Gimenez-Dejoz
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science Saitama Japan
| | - Keiji Numata
- Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science Saitama Japan
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University Kyoto Japan
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7
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Luo G, Zhang J, Sun Y, Wang Y, Wang H, Cheng B, Shu Q, Fang X. Nanoplatforms for Sepsis Management: Rapid Detection/Warning, Pathogen Elimination and Restoring Immune Homeostasis. NANO-MICRO LETTERS 2021; 13:88. [PMID: 33717630 PMCID: PMC7938387 DOI: 10.1007/s40820-021-00598-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 12/14/2020] [Indexed: 05/20/2023]
Abstract
Sepsis, a highly life-threatening organ dysfunction caused by uncontrollable immune responses to infection, is a leading contributor to mortality in intensive care units. Sepsis-related deaths have been reported to account for 19.7% of all global deaths. However, no effective and specific therapeutic for clinical sepsis management is available due to the complex pathogenesis. Concurrently eliminating infections and restoring immune homeostasis are regarded as the core strategies to manage sepsis. Sophisticated nanoplatforms guided by supramolecular and medicinal chemistry, targeting infection and/or imbalanced immune responses, have emerged as potent tools to combat sepsis by supporting more accurate diagnosis and precision treatment. Nanoplatforms can overcome the barriers faced by clinical strategies, including delayed diagnosis, drug resistance and incapacity to manage immune disorders. Here, we present a comprehensive review highlighting the pathogenetic characteristics of sepsis and future therapeutic concepts, summarizing the progress of these well-designed nanoplatforms in sepsis management and discussing the ongoing challenges and perspectives regarding future potential therapies. Based on these state-of-the-art studies, this review will advance multidisciplinary collaboration and drive clinical translation to remedy sepsis.
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Affiliation(s)
- Gan Luo
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Jue Zhang
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Yaqi Sun
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Ya Wang
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Hanbin Wang
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Baoli Cheng
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
| | - Qiang Shu
- National Clinical Research Center for Child Health, Children’s Hospital, School of Medicine, Zhejiang University, Hangzhou, 310052 People’s Republic of China
| | - Xiangming Fang
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003 People’s Republic of China
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8
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Chen YC, Yang Y, Zhang C, Chen HY, Chen F, Wang KJ. A Novel Antimicrobial Peptide Sparamosin 26-54 From the Mud Crab Scylla paramamosain Showing Potent Antifungal Activity Against Cryptococcus neoformans. Front Microbiol 2021; 12:746006. [PMID: 34690992 PMCID: PMC8531530 DOI: 10.3389/fmicb.2021.746006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/17/2021] [Indexed: 11/20/2022] Open
Abstract
Due to the increasing prevalence of drug-resistant fungi and the limitations of current treatment strategies to fungal infections, exploration and development of new antifungal drugs or substituents are necessary. In the study, a novel antimicrobial peptide, named Sparamosin, was identified in the mud crab Scylla paramamosain, which contains a signal peptide of 22 amino acids and a mature peptide of 54 amino acids. The antimicrobial activity of its synthetic mature peptide and two truncated peptides (Sparamosin1–25 and Sparamosin26–54) were determined. The results showed that Sparamosin26–54 had the strongest activity against a variety of Gram-negative bacteria, Gram-positive bacteria and fungi, in particular had rapid fungicidal kinetics (killed 99% Cryptococcus neoformans within 10 min) and had potent anti-biofilm activity against C. neoformans, but had no cytotoxic effect on mammalian cells. The RNA-seq results showed that after Sparamosin26–54 treatment, the expression of genes involved in cell wall component biosynthesis, cell wall integrity signaling pathway, anti-oxidative stress, apoptosis and DNA repair were significantly up-regulated, indicating that Sparamosin26–54 might disrupt the cell wall of C. neoformans, causing oxidative stress, DNA damage and cell apoptosis. The underlying mechanism was further confirmed. Sparamosin26–54 could bind to several phospholipids in the cell membrane and effectively killed C. neoformans through disrupting the integrity of the cell wall and cell membrane observed by electron microscope and staining assay. In addition, it was found that the accumulation of reactive oxygen species (ROS) increased, the mitochondrial membrane potential (MMP) was disrupted, and DNA fragmentation was induced after Sparamosin26–54 treatment, which are all hallmarks of apoptosis. Taken together, Sparamosin26–54 has a good application prospect as an effective antimicrobial agent, especially for C. neoformans infections.
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Affiliation(s)
- Yan-Chao Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Ying Yang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Chang Zhang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Hui-Yun Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Fangyi Chen
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
| | - Ke-Jian Wang
- State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,State-Province Joint Engineering Laboratory of Marine Bioproducts and Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.,Fujian Innovation Research Institute for Marine Biological Antimicrobial Peptide Industrial Technology, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China
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9
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Hamada Y, Tokoro Y, Oyama T. Chiral Self‐Sorting of Diformylated
N
‐Hetero‐
ortho
‐phenylene Hexamers by Macrocyclization with Aromatic Diamines. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yoshihiro Hamada
- Department of Advanced Chemistry Faculty of Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
| | - Yuichiro Tokoro
- Department of Applied Chemistry School of Applied Science National Defense Academy of Japan 1-10-20 Hashirimizu Yokosuka Kanagawa 239-8686 Japan
| | - Toshiyuki Oyama
- Department of Advanced Chemistry Faculty of Engineering Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan
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10
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Thankappan B, Sivakumar J, Asokan S, Ramasamy M, Pillai MM, Selvakumar R, Angayarkanni J. Dual antimicrobial and anticancer activity of a novel synthetic α-helical antimicrobial peptide. Eur J Pharm Sci 2021; 161:105784. [PMID: 33677023 DOI: 10.1016/j.ejps.2021.105784] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Revised: 02/05/2021] [Accepted: 02/25/2021] [Indexed: 12/01/2022]
Abstract
Antimicrobial peptides (AMPs) are increasingly sought-after and researched antimicrobial agents due to its desired pharmacological properties and the continuous diminishing efficacy of antibiotics. In addition to this line of research, the aim of the present study is to determine the antimicrobial and anticancer activity of a de novo designed α-helical peptide. Circular dichroism showed 100% helical nature of the peptide in 10 mM SDS. Notably, the peptide exerted significant antimicrobial activity against the reference and antibiotic-resistant clinical isolates belonging to Pseudomonas sp. at a MIC and MBC of 2 and 8 μM, respectively. The progressive disruption and disturbance of cell membrane in the overall topography was observed in the scanning electron microscopy (SEM) micrographs of Pseudomonas aeruginosa ATCC 27853 treated with the peptide as compared to untreated control. The results of time-kill kinetics showed complete lysis at 3x MIC after 50 min of incubation of the microbe with the peptide. Moreover, the peptide did not lyse human RBCs even at the highest concentration of the peptide (10 mM) and retained its activity upon treatment at 0.5 mg/ml trypsin. Cancer cell lines, viz. A549 and MCF-7 were also found to be sensitive to peptide activity showing 50% reduction in survivability at 4 and 2 μM, respectively; however, L929 cells were unaffected. Drastic membrane permeability and necrotic mode of lysis of peptide-treated-A549 cells were affirmed by propidium iodide and live/dead cell staining. The results showed that the designed peptide could be an efficient drug molecule for clinical studies subjected to successful experiments on animal models.
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Affiliation(s)
- Bency Thankappan
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India.
| | - Jeyarajan Sivakumar
- Department of Pathology, University of Michigan, Annabor, 48108, United States
| | - Sridhar Asokan
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India
| | - Mahendran Ramasamy
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India
| | - Mamatha M Pillai
- Tissue Engineering Laboratory, PSG Institute of Advanced Studies, Coimbatore, 641 004, Tamil Nadu, India
| | - R Selvakumar
- Tissue Engineering Laboratory, PSG Institute of Advanced Studies, Coimbatore, 641 004, Tamil Nadu, India
| | - Jayaraman Angayarkanni
- Department of Microbial Biotechnology, Bharathiar University, Coimbatore, 641046, Tamil Nadu, India
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11
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Bobeica SC, Zhu L, Acedo JZ, Tang W, van der Donk WA. Structural determinants of macrocyclization in substrate-controlled lanthipeptide biosynthetic pathways. Chem Sci 2020; 11:12854-12870. [PMID: 34094481 PMCID: PMC8163290 DOI: 10.1039/d0sc01651a] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Lanthipeptides are characterized by thioether crosslinks formed by post-translational modifications. The cyclization process that favors a single ring pattern over many other possible ring patterns has been the topic of much speculation. Recent studies suggest that for some systems the cyclization pattern and stereochemistry is determined not by the enzyme, but by the sequence of the precursor peptide. However, the factors that govern the outcome of the cyclization process are not understood. This study presents the three-dimensional structures of seven lanthipeptides determined by nuclear magnetic resonance spectroscopy, including five prochlorosins and the two peptides that make up cytolysin, a virulence factor produced by Enterococcus faecalis that is directly linked to human disease. These peptides were chosen because their substrate sequence determines either the ring pattern (prochlorosins) or the stereochemistry of cyclization (cytolysins). We present the structures of prochlorosins 1.1, 2.1, 2.8, 2.10 and 2.11, the first three-dimensional structures of prochlorosins. Our findings provide insights into the molecular determinants of cyclization as well as why some prochlorosins may be better starting points for library generation than others. The structures of the large and small subunits of the enterococcal cytolysin show that these peptides have long helical stretches, a rare observation for lanthipeptides characterized to date. These helices may explain their pore forming activity and suggest that the small subunit may recognize a molecular target followed by recruitment of the large subunit to span the membrane.
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Affiliation(s)
- Silvia C Bobeica
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign 600 South Mathews Avenue Urbana Illinois 61801 USA +1-217-244-8533 +1-217-244-5360
| | - Lingyang Zhu
- School of Chemical Sciences NMR Laboratory, University of Illinois at Urbana-Champaign 505 South Mathews Avenue Urbana Illinois 61801 USA
| | - Jeella Z Acedo
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign 600 South Mathews Avenue Urbana Illinois 61801 USA +1-217-244-8533 +1-217-244-5360
| | - Weixin Tang
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign 600 South Mathews Avenue Urbana Illinois 61801 USA +1-217-244-8533 +1-217-244-5360
| | - Wilfred A van der Donk
- Department of Chemistry and Howard Hughes Medical Institute, University of Illinois at Urbana-Champaign 600 South Mathews Avenue Urbana Illinois 61801 USA +1-217-244-8533 +1-217-244-5360
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12
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Wang C, Piao J, Li Y, Tian X, Dong Y, Liu D. Construction of Liposomes Mimicking Cell Membrane Structure through Frame‐Guided Assembly. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005334] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Chao Wang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jiafang Piao
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yujie Li
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xiancheng Tian
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yuanchen Dong
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Dongsheng Liu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
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13
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Wang C, Piao J, Li Y, Tian X, Dong Y, Liu D. Construction of Liposomes Mimicking Cell Membrane Structure through Frame‐Guided Assembly. Angew Chem Int Ed Engl 2020; 59:15176-15180. [DOI: 10.1002/anie.202005334] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 05/15/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Chao Wang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Jiafang Piao
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yujie Li
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Xiancheng Tian
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
| | - Yuanchen Dong
- Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Colloid, Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Dongsheng Liu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering of the Ministry of Education Department of Chemistry Tsinghua University Beijing 100084 China
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14
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Liang Y, Zhang X, Yuan Y, Bao Y, Xiong M. Role and modulation of the secondary structure of antimicrobial peptides to improve selectivity. Biomater Sci 2020; 8:6858-6866. [PMID: 32815940 DOI: 10.1039/d0bm00801j] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Helix is a two-edged sword for AMPs, and conformational modulation of AMPs can control the balance between antimicrobial activity and toxicity.
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Affiliation(s)
- Yangbin Liang
- Guangzhou First People's Hospital
- School of Biomedical Sciences and Engineering
- South China University of Technology
- Guangzhou
- P. R. China
| | - Xinshuang Zhang
- Guangzhou First People's Hospital
- School of Biomedical Sciences and Engineering
- South China University of Technology
- Guangzhou
- P. R. China
| | - Yueling Yuan
- Guangzhou First People's Hospital
- School of Biomedical Sciences and Engineering
- South China University of Technology
- Guangzhou
- P. R. China
| | - Yan Bao
- Medical Research Center
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation
- Sun Yat-sen Memorial Hospital
- Sun Yat-sen University
- Guangzhou
| | - Menghua Xiong
- Guangzhou First People's Hospital
- School of Biomedical Sciences and Engineering
- South China University of Technology
- Guangzhou
- P. R. China
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15
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Comparative mode of action of the antimicrobial peptide melimine and its derivative Mel4 against Pseudomonas aeruginosa. Sci Rep 2019; 9:7063. [PMID: 31068610 PMCID: PMC6506473 DOI: 10.1038/s41598-019-42440-2] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 03/18/2019] [Indexed: 12/16/2022] Open
Abstract
Melimine and Mel4 are chimeric cationic peptides with broad-spectrum antimicrobial activity. They have been shown to be highly biocompatible in animal models and human clinical trials. The current study examined the mechanism of action of these two antimicrobial peptides against P. aeruginosa. The effect of the peptides of endotoxin neutralization, and their interactions with cytoplasmic membranes using DiSC(3)-5 and Sytox green, Syto-9 and PI dyes were analysed. Release of ATP and DNA/RNA were determined using ATP luminescence and increase in OD260 nm. The bacteriolytic ability of the peptides was determined by measuring decreases in OD620 nm. Both the peptides neutralized LPS suggesting their interaction with lipid A. Cytoplasmic membrane was disrupted within 30 seconds, which correlated with reductions in cellular viability. At 2 minutes melimine or Mel4, released 75% and 36% cellular ATP respectively (P < 0.001). Membrane permeabilization started 5 minutes with simultaneous release of DNA/RNA. Flow cytometry demonstrated 52% and 18% bacteria were stained with PI after 30 minutes. Overall, melimine showed higher capacity for membrane disruption compared to Mel4 (P < 0.001). The findings of this study have been summarized as a timeline of bactericidal activity, suggesting that the peptides permeabilized P. aeruginosa within 5 minutes, started lysis within 2 hours of exposure.
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16
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Scheenstra MR, van den Belt M, Tjeerdsma-van Bokhoven JLM, Schneider VAF, Ordonez SR, van Dijk A, Veldhuizen EJA, Haagsman HP. Cathelicidins PMAP-36, LL-37 and CATH-2 are similar peptides with different modes of action. Sci Rep 2019; 9:4780. [PMID: 30886247 PMCID: PMC6423055 DOI: 10.1038/s41598-019-41246-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 02/25/2019] [Indexed: 12/30/2022] Open
Abstract
Host defense peptides (HDPs) play a pivotal role in innate immunity and have, in addition to antimicrobial activity, also important immunomodulatory functions. Bacteria are less likely to develop resistance against HDPs because these peptides target and kill bacteria in multiple ways, as well as modulate the immune system. Therefore, HDPs, and derivatives thereof, are promising alternatives to traditional antibiotics. Hardly anything is known about the immunomodulatory functions of porcine cathelicidin PMAP-36. In this study, we aimed to determine both antibacterial and immunomodulatory activities of PMAP-36 comparing the properties of PMAP-36 analogs with two well-studied peptides, human LL-37 and chicken CATH-2. Transmission electron microscopy revealed different killing mechanisms of E. coli for PMAP-36, CATH-2 and LL-37. LL-37 binds LPS very weakly in contrast to PMAP-36, but it inhibits LPS activation of macrophages the strongest. The first 11 amino acids of the N-terminal side of PMAP-36 are dispensable for E. coli killing, LPS-neutralization and binding. Deletion of four additional amino acids resulted in a strong decrease in activity. The activity of full length PMAP-36 was not affected by monomerization, whereas the shorter analogs require dimerization for proper immunomodulatory activity but not for their antibacterial activity.
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Affiliation(s)
- Maaike R Scheenstra
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands.
| | - Matthias van den Belt
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Johanna L M Tjeerdsma-van Bokhoven
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Viktoria A F Schneider
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Soledad R Ordonez
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Albert van Dijk
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Edwin J A Veldhuizen
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Henk P Haagsman
- Department of Infectious Diseases and Immunology, Division of Molecular Host Defence, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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17
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Chai TT, Tan YN, Ee KY, Xiao J, Wong FC. Seeds, fermented foods, and agricultural by-products as sources of plant-derived antibacterial peptides. Crit Rev Food Sci Nutr 2019; 59:S162-S177. [PMID: 30663883 DOI: 10.1080/10408398.2018.1561418] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Tsun-Thai Chai
- Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
- Centre for Biodiversity Research, Universiti Tunku Abdul Rahman, Kampar, Malaysia
| | - Yen-Nee Tan
- Centre for Biodiversity Research, Universiti Tunku Abdul Rahman, Kampar, Malaysia
- Department of Agricultural and Food Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
| | - Kah-Yaw Ee
- Centre for Biodiversity Research, Universiti Tunku Abdul Rahman, Kampar, Malaysia
- Department of Agricultural and Food Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
| | - Jianbo Xiao
- Institute of Chinese Medical Sciences, SKL of Quality Research in Chinese Medicine, University of Macau, Avenida da Universidade, Taipa, Macau, P. R. China
| | - Fai-Chu Wong
- Department of Chemical Science, Faculty of Science, Universiti Tunku Abdul Rahman, Kampar, Malaysia
- Centre for Biodiversity Research, Universiti Tunku Abdul Rahman, Kampar, Malaysia
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18
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Dong N, Wang Z, Chou S, Zhang L, Shan A, Jiang J. Antibacterial activities and molecular mechanism of amino-terminal fragments from pig nematode antimicrobial peptide CP-1. Chem Biol Drug Des 2018; 91:1017-1029. [PMID: 29266746 DOI: 10.1111/cbdd.13165] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 10/18/2017] [Accepted: 12/07/2017] [Indexed: 12/20/2022]
Abstract
High manufacturing costs and weak cell selectivity have limited the clinical application of naturally occurring peptides when faced with an outbreak of drug resistance. To overcome these limitations, a set of antimicrobial peptides was synthesized with the general sequence of (WL)n, where n = 1, 2, 3, and WL was truncated from the N-terminus of Cecropin P1 without initial serine residues. The antimicrobial peptide WL3 exhibited stronger antimicrobial activity against both Gram-negative and Gram-positive microbes than the parental peptide CP-1. WL3 showed no hemolysis even at the highest test concentrations compared to the parental peptide CP-1. The condition sensitivity assays (salts, serum, and trypsin) demonstrated that WL3 had high stability in vitro. Fluorescence spectroscopy and electron microscopy indicated that WL3 killed microbes by means of penetrating the membrane and causing cell lysis. In a mouse model, WL3 was able to significantly reduce the bacteria load in major organs and cytokines (TNF-α, IL-6, and IL-1β) levels in serum. In summary, these findings suggest that WL3, which was modified from a natural antimicrobial peptide, has enormous potential for application as a novel antibacterial agent.
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Affiliation(s)
- Na Dong
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Zhihua Wang
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Shuli Chou
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Licong Zhang
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Anshan Shan
- The Laboratory of Molecular Nutrition and Immunity, Institute of Animal Nutrition, Northeast Agricultural University, Harbin, China
| | - Junguang Jiang
- The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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19
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A potential food biopreservative, CecXJ-37N, non-covalently intercalates into the nucleotides of bacterial genomic DNA beyond membrane attack. Food Chem 2016; 217:576-584. [PMID: 27664674 DOI: 10.1016/j.foodchem.2016.09.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/03/2016] [Accepted: 09/05/2016] [Indexed: 01/10/2023]
Abstract
The antibacterial activities and mechanism of an amide-modified peptide CecXJ-37N were investigated in this study. CecXJ-37N showed small MICs (0.25-7.8μM) against eight harmful strains common in food industry. The α-helix proportion of CecXJ-37N increased by 11-fold in prokaryotic membrane comparable environments; cytotoxicity studies demonstrated the MHC was significantly higher than that of non-amidated isoform. Moreover, CecXJ-37N possessed stronger capacities to resist trypsin and pepsin hydrolysis within two hours. Flow cytometry and scanning electron microscopy demonstrated that CecXJ-37N induced pore-formation, morphological changes, and lysed E. coli cells. Fluorescence microscopy indicated that CecXJ-37N penetrated E. coli membrane and accumulated in cytoplasm. Further ultraviolet-visible spectroscopy suggested that CecXJ-37N changed the action mode of parental peptide interacting with bacterial genome from outside binding to a tightly non-covalent intercalation into nucleotides. Overall, this study suggested that amide-modification enhanced antimicrobial activity and reduced the cytotoxicity, thus could be potential strategies for developing novel food preservatives.
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20
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Oh KI, Smith-Dupont KB, Markiewicz BN, Gai F. Kinetics of peptide folding in lipid membranes. Biopolymers 2016; 104:281-90. [PMID: 25808575 DOI: 10.1002/bip.22640] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 02/12/2015] [Accepted: 02/14/2015] [Indexed: 12/31/2022]
Abstract
Despite our extensive understanding of water-soluble protein folding kinetics, much less is known about the folding dynamics and mechanisms of membrane proteins. However, recent studies have shown that for relatively simple systems, such as peptides that form a transmembrane α-helix, helical dimer, or helix-turn-helix, it is possible to assess the kinetics of several important steps, including peptide binding to the membrane from aqueous solution, peptide folding on the membrane surface, helix insertion into the membrane, and helix-helix association inside the membrane. Herein, we provide a brief review of these studies and also suggest new initiation and probing methods that could lead to improved temporal and structural resolution in future experiments.
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Affiliation(s)
- Kwang-Im Oh
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104
| | - Kathryn B Smith-Dupont
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139
| | | | - Feng Gai
- Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104
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21
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Antimicrobial activity, improved cell selectivity and mode of action of short PMAP-36-derived peptides against bacteria and Candida. Sci Rep 2016; 6:27258. [PMID: 27251456 PMCID: PMC4890124 DOI: 10.1038/srep27258] [Citation(s) in RCA: 148] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 05/17/2016] [Indexed: 11/08/2022] Open
Abstract
Antimicrobial peptides (AMPs) have recently attracted a great deal of attention as promising antibiotic candidates, but some obstacles such as toxicity and high synthesis cost must be addressed before developing them further. For developing short peptides with improved cell selectivity, we designed a series of modified PMAP-36 analogues. Antimicrobial assays showed that decreasing chain length in a certain range retained the high antimicrobial activity of the parental peptide and reduced hemolysis. The 18-mer peptide RI18 exhibited excellent antimicrobial activity against both bacteria and fungi, and its hemolytic activity was observably lower than PMAP-36 and melittin. The selectivity indexes of RI18 against bacteria and fungi were improved approximately 19-fold and 108-fold, respectively, compared to PMAP-36. In addition, serum did not affect the antibacterial activity of RI18 against E. coli but inhibited the antifungal efficiency against C. albicans. Flow cytometry and electron microscopy observation revealed that RI18 killed microbial cells primarily by damaging membrane integrity, leading to whole cell lysis. Taken together, these results suggest that RI18 has potential for further therapeutic research against frequently-encountered bacteria and fungi. Meanwhile, modification of AMPs is a promising strategy for developing novel antimicrobials to overcome drug-resistance.
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22
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Pretzel J, Mohring F, Rahlfs S, Becker K. Antiparasitic peptides. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2016; 135:157-92. [PMID: 23615879 DOI: 10.1007/10_2013_191] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
: The most important parasitic diseases, malaria, leishmaniasis, trypanosomiasis, and schistosomiasis, are a great burden to mankind, threatening the life of millions of people worldwide and mostly affecting the poorest. Because drug resistance is increasing and vaccines are rarely available, novel chemotherapeutic compounds are necessary in order to treat these devastating diseases. Insects serve as vectors of many human parasitic diseases and have been shown to express a huge variety of antimicrobial peptides (AMPs). Therefore, research activity on insect-derived AMPs has been increasing in the last 40 years. This chapter summarizes the current state of research on the possible role of AMPs as potential chemotherapeutic compounds against human parasitic diseases. As a representative antimicrobial peptide with antiparasitic activity, the structure of insect defensin A is shown [PDB accession code: 1ICA]. The molecule is surrounded by schematic representations of the human pathogenic parasites Plasmodium, Leishmania and Trypanosoma.
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Affiliation(s)
- Jette Pretzel
- Biochemistry and Molecular Biology, Interdisciplinary Research Center, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany
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23
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Anupa G, Bhat MA, Srivastava AK, Sharma JB, Mehta N, Patil A, Sengupta J, Ghosh D. Cationic antimicrobial peptide, magainin down-regulates secretion of pro-inflammatory cytokines by early placental cytotrophoblasts. Reprod Biol Endocrinol 2015; 13:121. [PMID: 26546156 PMCID: PMC4636767 DOI: 10.1186/s12958-015-0119-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 11/02/2015] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Human placental villous cytotrophoblasts exhibit relative externalization of negatively charged moieties to the outer leaflet of the plasma membrane during the time of syncytialization rendering their reactivity to positively charged cationic antimicrobial peptides (CAMPs) during the window of implantation and early placentation. Vaginal administration of a synthetic CAMP, Ala(8,13,18)-magainin II amide (AMA) inhibited blastocyst implantation and early placentation in monkeys. Furthermore, the administration of AMA resulted in significant inhibition of cell differentiation, enhancement in apoptosis and loss of viability in first trimester placental villous cytotrophoblasts in primary culture. The present study examines the effect of in vitro application of different doses (0, 1, 10, 100, 1000 ng/ml) of AMA on the secreted cytokine profiles of cytotrophoblasts obtained from placental villi samples (n = 13) collected during 8-9 weeks of gestation and grown on three-dimensional collagen matrix in vitro. METHODS A panel of forty-eight (48) cytokines in conditioned medium was analysed using multiplex immunoassays technique. Further, the steady state transcript levels of four cytokines (CCL4, CCL5, IL1B, IL6), the concentrations of which were affected by AMA in the isolated cytotrophoblasts, as well as, two cytokines (IL1A and TNF) which were not affected by AMA were estimated. Input list of cytokines secreted by cytotrophoblasts and showing differential secretion in response to AMA were used in enrichment analysis for the generation of biological networks. RESULTS Placental cytotrophoblasts secreted 27 cytokines, 13 of which are affected by AMA in vitro with significantly decreased secretion of CCLs-2, 3, 4, 5, CXCLs-1 and 8, FGF2 and MCSF and that of IL1B, IL6 and MIF, and increased secretion of IL16 and IL-2RA. Of the above cytokines showing differential secretion, only IL-2RA, IL16 and MIF showed significant correspondence in the steady state expression of their respective transcript levels. Post-hoc Enrichment analysis revealed Toll-like receptor (TLR) mediated pathways were the top-scored target pathways that were affected by AMA. CONCLUSIONS Administration of a CAMP causes shift in the balance of immune-inflammatory responses involving downstream pathways of TLRs in cytotrophoblast function. Further verification of functions of placental trophoblasts on administration of CAMP with pregnancy outcome is necessary.
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Affiliation(s)
- G Anupa
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - M A Bhat
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - A K Srivastava
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - J B Sharma
- Department of Obstetrics and Gynaecology, All India Institute of Medical Sciences, New Delhi, India.
| | - N Mehta
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - Asmita Patil
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - Jayasree Sengupta
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
| | - D Ghosh
- Department of Physiology, All India Institute of Medical Sciences, New Delhi, India.
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24
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Liu Y, Zhu L, Yang J, Sun J, Zhao J, Liang D. Axial growth and fusion of liposome regulated by macromolecular crowding and confinement. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4822-4826. [PMID: 25874379 DOI: 10.1021/la504699y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The endomembrane system, including the endoplasmic reticulum, Golgi apparatus, lysosomes, and endosomes, is located in the crowded intracellular environment. An understanding of the cellular structure and functions requires knowledge of how macromolecular crowding and confinement affect the activity of membrane and its proteins. Using negatively charged liposome and the peptide K3L8K3 as a model system, we studied the aggregation behavior of liposome in a matrix of polyacrylamide and hyaluronic acid. Without matrix, the liposomes form spherical aggregates in the presence of K3L8K3. However, they orient in one dimension and fuse into a tube up to 40 μm long in the matrix. The growth of the tube is via end-to-end connection. This anisotropic growth is mainly due to the macromolecular confinement provided by the polymer network. The study of the interactions between liposome and peptide in the crowded environment helps to reveal the mechanism of membrane-related processes in vivo.
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Affiliation(s)
- Yun Liu
- †Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Lin Zhu
- †Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jingfa Yang
- ‡Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jianbo Sun
- †Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
| | - Jiang Zhao
- ‡Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Dehai Liang
- †Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China
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25
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Vale N, Aguiar L, Gomes P. Antimicrobial peptides: a new class of antimalarial drugs? Front Pharmacol 2014; 5:275. [PMID: 25566072 PMCID: PMC4271771 DOI: 10.3389/fphar.2014.00275] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 11/26/2014] [Indexed: 12/12/2022] Open
Abstract
A range of antimicrobial peptides (AMP) exhibit activity on malaria parasites, Plasmodium spp., in their blood or mosquito stages, or both. These peptides include a diverse array of both natural and synthetic molecules varying greatly in size, charge, hydrophobicity, and secondary structure features. Along with an overview of relevant literature reports regarding AMP that display antiplasmodial activity, this review makes a few considerations about those molecules as a potential new class of antimalarial drugs.
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Affiliation(s)
- Nuno Vale
- Department of Chemistry and Biochemistry, Faculty of Sciences, Centro de Investigação em Química, University of Porto Porto, Portugal
| | - Luísa Aguiar
- Department of Chemistry and Biochemistry, Faculty of Sciences, Centro de Investigação em Química, University of Porto Porto, Portugal
| | - Paula Gomes
- Department of Chemistry and Biochemistry, Faculty of Sciences, Centro de Investigação em Química, University of Porto Porto, Portugal
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26
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Sawma P, Roth L, Blanchard C, Bagnard D, Crémel G, Bouveret E, Duneau JP, Sturgis JN, Hubert P. Evidence for new homotypic and heterotypic interactions between transmembrane helices of proteins involved in receptor tyrosine kinase and neuropilin signaling. J Mol Biol 2014; 426:4099-4111. [PMID: 25315821 DOI: 10.1016/j.jmb.2014.10.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 09/26/2014] [Accepted: 10/08/2014] [Indexed: 12/31/2022]
Abstract
Signaling in eukaryotic cells frequently relies on dynamic interactions of single-pass membrane receptors involving their transmembrane (TM) domains. To search for new such interactions, we have developed a bacterial two-hybrid system to screen for both homotypic and heterotypic interactions between TM helices. We have explored the dimerization of TM domains from 16 proteins involved in both receptor tyrosine kinase and neuropilin signaling. This study has revealed several new interactions. We found that the TM domain of Mucin-4, a putative intramembrane ligand for erbB2, dimerizes not only with erbB2 but also with all four members of the erbB family. In the Neuropilin/Plexin family of receptors, we showed that the TM domains of Neuropilins 1 and 2 dimerize with themselves and also with Plexin-A1, Plexin-B1, and L1CAM, but we were unable to observe interactions with several other TM domains notably those of members of the VEGF receptor family. The potentially important Neuropilin 1/Plexin-A1 interaction was confirmed using a surface plasmon resonance assay. This work shows that TM domain interactions can be highly specific. Exploring further the propensities of TM helix-helix association in cell membrane should have important practical implications related to our understanding of the structure-function of bitopic proteins' assembly and subsequent function, especially in the regulation of signal transduction.
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Affiliation(s)
- Paul Sawma
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Lise Roth
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Cécile Blanchard
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Dominique Bagnard
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Gérard Crémel
- INSERM U 1109 and University of Strasbourg, 3 Avenue Molière, 67200 Strasbourg, France
| | - Emmanuelle Bouveret
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Jean-Pierre Duneau
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - James N Sturgis
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Pierre Hubert
- Laboratoire d'Ingénierie des Systèmes Macromoléculaires, UMR 7255, Centre National de la Recherche Scientifique and Aix-Marseille University, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France.
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Sun J, Xia Y, Li D, Du Q, Liang D. Relationship between peptide structure and antimicrobial activity as studied by de novo designed peptides. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2985-93. [PMID: 25157672 DOI: 10.1016/j.bbamem.2014.08.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 07/05/2014] [Accepted: 08/15/2014] [Indexed: 11/17/2022]
Abstract
As fundamental components in innate immunity, antimicrobial peptides (AMPs) hold great potentials in the treatment of persistent infections involving slow-growing or dormant bacteria in which, selective inhibition of prokaryotic bacteria in the context of eukaryotic cells is not only an essential requirement, but also a critical challenge in the development of antimicrobial peptides. To identify the sequence and structural properties critical for antimicrobial activity, a series of peptides varying in sequence, length, hydrophobicity/charge ratio, and secondary structure, were designed and synthesized. Their antimicrobial activities were then tested using Escherichia coli and HEK293 cells, together with several index activities against model membrane, including liposome leakage, fusion, and aggregation. While no evident correlation between the antimicrobial activity and the property of the peptides was observed, common activities against model membrane were nevertheless identified for the active antimicrobial peptides: mediating efficient membrane leakage, negligible membrane fusion and liposome aggregation. Therefore, in addition to identifying one highly active antimicrobial peptide, our study further sheds light on the design principle for these molecules.
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Affiliation(s)
- Jianbo Sun
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, 100871 China
| | - Yuqiong Xia
- School of Life Sciences and Technology, Xidian University, Xi'an, Shaanxi 710126, China
| | - Dong Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100871, China
| | - Quan Du
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100871, China.
| | - Dehai Liang
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, 100871 China.
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Aci-Sèche S, Sawma P, Hubert P, Sturgis JN, Bagnard D, Jacob L, Genest M, Garnier N. Transmembrane recognition of the semaphorin co-receptors neuropilin 1 and plexin A1: coarse-grained simulations. PLoS One 2014; 9:e97779. [PMID: 24858828 PMCID: PMC4032258 DOI: 10.1371/journal.pone.0097779] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 04/23/2014] [Indexed: 12/13/2022] Open
Abstract
The cancer associated class 3 semaphorins require direct binding to neuropilins and association to plexins to trigger cell signaling. Here, we address the role of the transmembrane domains of neuropilin 1 and plexin A1 for the dimerization of the two receptors by characterizing the assembly in lipid bilayers using coarse-grained molecular dynamics simulations. From experimental evidence using a two-hybrid system showing the biochemical association of the two receptors transmembrane domains, we performed molecular simulations in DOPC and POPC demonstrating spontaneously assembly to form homodimers and heterodimers with a very high propensity for right-handed packing of the helices. Inversely, left-handed packing was observed with a very low propensity. This mode of packing was observed uniquely when the plexin A1 transmembrane domain was involved in association. Potential of mean force calculations were used to predict a hierarchy of self-association for the monomers: the two neuropilin 1 transmembrane domains strongly associated, neuropilin 1 and plexin A1 transmembrane domains associated less and the two plexin A1 transmembrane domains weakly but significantly associated. We demonstrated that homodimerization and heterodimerization are driven by GxxxG motifs, and that the sequence context modulates the packing mode of the plexin A1 transmembrane domains. This work presents major advances towards our understanding of membrane signaling platforms assembly through membrane domains and provides exquisite information for the design of antagonist drugs defining a novel class of therapeutic agents.
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Affiliation(s)
- Samia Aci-Sèche
- Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique UPR, Université d’Orléans, Orléans, France
| | - Paul Sawma
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires UMR, Université d’Aix-Marseille, Marseille, France
| | - Pierre Hubert
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires UMR, Université d’Aix-Marseille, Marseille, France
| | - James N. Sturgis
- Laboratoire d’Ingénierie des Systèmes Macromoléculaires UMR, Université d’Aix-Marseille, Marseille, France
| | - Dominique Bagnard
- Institut National de la Santé et de la Recherche Médicale, Labex Medalis, Université de Strasbourg, Strasbourg, France
| | - Laurent Jacob
- Institut National de la Santé et de la Recherche Médicale, Labex Medalis, Université de Strasbourg, Strasbourg, France
| | - Monique Genest
- Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique UPR, Université d’Orléans, Orléans, France
- * E-mail: (NG); (MG)
| | - Norbert Garnier
- Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique UPR, Université d’Orléans, Orléans, France
- * E-mail: (NG); (MG)
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Lu H, Wang J, Song Z, Yin L, Zhang Y, Tang H, Tu C, Lin Y, Cheng J. Recent advances in amino acid N-carboxyanhydrides and synthetic polypeptides: chemistry, self-assembly and biological applications. Chem Commun (Camb) 2014; 50:139-55. [DOI: 10.1039/c3cc46317f] [Citation(s) in RCA: 231] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Bechinger B, Salnikov ES. The membrane interactions of antimicrobial peptides revealed by solid-state NMR spectroscopy. Chem Phys Lipids 2012; 165:282-301. [DOI: 10.1016/j.chemphyslip.2012.01.009] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 01/25/2012] [Accepted: 01/27/2012] [Indexed: 01/29/2023]
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31
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D'Este F, Tomasinsig L, Skerlavaj B, Zanetti M. Modulation of cytokine gene expression by cathelicidin BMAP-28 in LPS-stimulated and -unstimulated macrophages. Immunobiology 2012; 217:962-71. [PMID: 22317752 DOI: 10.1016/j.imbio.2012.01.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 12/05/2011] [Accepted: 01/06/2012] [Indexed: 11/26/2022]
Abstract
Apart from direct bacterial killing, antimicrobial host defence peptides (HDPs) exert various other biological activities that also include modulation of immune responses to infection. The bovine cathelicidin BMAP-28 has been extensively studied with regard to its direct antibacterial activity while little is known about its effects on immune cell function. We have investigated its ability to affect inflammatory pathways and to influence the proinflammatory response induced by LPS in RAW 264.7 macrophages, in terms of modulation of TLR4 activation and cytokine gene induction. BMAP-28 on its own elicited ERK1/2, p38 and NF-κB activation leading to upregulation of IL-1β gene expression in these cells, suggesting it has the capacity to activate selected cellular pathways through direct effects on macrophages. As expected based on its in vitro LPS-binding properties, BMAP-28 blocked LPS-induced cytokine gene expression when added to the cell culture in combination with LPS. However it enhanced the induction of IL-1β and IL-6 genes and suppressed that of IFN-β when added prior to or following LPS stimulation over a 30-60 min time interval, or when co-administered with taxol as another TLR4 stimulant. It did not inhibit the expression of IFN-β induced by the TLR3 ligand poly(I:C). Overall these results, and the fact that BMAP-28 increased the LPS-stimulated activation of NF-κB while diminishing that of IRF-3, suggest that the peptide potentiates the early TLR4-mediated proinflammatory cytokine response while inhibiting the TLR4/TRAM/TRIF signaling pathway leading to IRF-3 activation and IFN-β gene expression. Using a TLR4-specific antibody we also found that BMAP-28 decreased the LPS-induced internalization of surface TLR4 required for initiating the TRAM/TRIF signaling pathway, which provides a mechanism for the inhibitory effect of the peptide on the TLR4/TRAM/TRIF pathway.
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Affiliation(s)
- Francesca D'Este
- Department of Medical and Biological Sciences, University of Udine, Udine, Italy
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Bechinger B. Insights into the mechanisms of action of host defence peptides from biophysical and structural investigations. J Pept Sci 2011; 17:306-14. [DOI: 10.1002/psc.1343] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Revised: 11/12/2010] [Accepted: 11/15/2010] [Indexed: 01/09/2023]
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Montenegro J, Fin A, Matile S. Comprehensive screening of octopus amphiphiles as DNA activators in lipid bilayers: implications on transport, sensing and cellular uptake. Org Biomol Chem 2011; 9:2641-7. [DOI: 10.1039/c0ob00948b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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