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Zhang X, Chen R, Shu H, Liang P, Qin T, Wang K, Guo A, Craik DJ, Liao B, Zhang J. Gene-guided identifications of a structure-chimeric cyclotide viphi I from Viola philippica: Potential functions against cadmium and nematodes. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2024; 347:112185. [PMID: 38986912 DOI: 10.1016/j.plantsci.2024.112185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 07/04/2024] [Accepted: 07/06/2024] [Indexed: 07/12/2024]
Abstract
The cyclic peptides, cyclotides, are identified mostly with 29-31-aa (amino acid residues) but rarely with ≥ 34-aa in plants. Viola philippica is a well-known medicinal plant but a rare metallophyte with cyclotides. A hypothesis was hence raised that the potential novel 34-aa cyclotide of Viola philippica would clearly broaden the structural and functional diversities of plant cyclotides. After homology-cloning the cyclotide precursor gene of VpCP5, a 34-aa cyclotide (viphi I) was identified to be larger than 22 other known cyclotides in V. philippica. It had a chimeric primary structure, due to its unusual loop structures (8 residues in loop 2 and 6 residues in loop 5) and aa composition (3 E and 5 R), by using phylogenetic analyses and an in-house cyclotide analysis tool, CyExcel_V1. A plasmid pCYC-viphi_I and a lab-used recombinant process were specially constructed for preparing viphi I. Typically, 0.12 or 0.25 mg ml-1 co-exposed viphi I could significantly remain cell activities with elevating Cd2+-exposed doses from 10-8 to 10-6 mol l-1 in MCF7 cells. In the model nematode Caenorhabditis elegans, IC50 values of viphi I to inhibit adult ratios and to induce death ratios, were 184.7 and 585.9 µg ml-1, respectively; the median lifespan of adult worms decreased from 14 to 2 d at viphi I doses ranging from 0.05 to 2 mg ml-1. Taken together, the newly identified viphi I exhibits functional potentials against cadmium and nematodes, providing new insights into structural and functional diversity of chimeric cyclotides in plants.
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Affiliation(s)
- Xiaojie Zhang
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
| | - Ruohong Chen
- Sun Yat-sen University, School of Life Sciences, Guangzhou 510275, China.
| | - Haoyue Shu
- Sun Yat-sen University, School of Life Sciences, Guangzhou 510275, China.
| | - Peihui Liang
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
| | - Ting Qin
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
| | - Kemei Wang
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
| | - Aimin Guo
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
| | - David J Craik
- The University of Queensland, Institute for Molecular Bioscience, Brisbane, QLD 4072, Australia.
| | - Bin Liao
- Sun Yat-sen University, School of Life Sciences, Guangzhou 510275, China.
| | - Jun Zhang
- Guangdong Pharmaceutical University, School of Life Sciences and Biopharmaceutics, Guangzhou 510006, China.
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2
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Dang TT, Tran TTT, Pham SH, Quach TH, Ngo NTQ, Nguyen THN. Characterization of cyclotides Mra30 and cycloviolacin O17 derived from Viola dalatensis Gadnep. Arch Microbiol 2024; 206:396. [PMID: 39249533 DOI: 10.1007/s00203-024-04122-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Revised: 08/19/2024] [Accepted: 08/27/2024] [Indexed: 09/10/2024]
Abstract
Bacteria threaten human and animal health, and standard antibiotics no longer effective. Antibiotic-resistant microorganisms can make infection treatment challenging and perhaps fail. Investigating the attributes of cyclotide, a peptide with promising antibacterial properties that holds great potential in the field of antibiotic research. The structure of these cyclic peptides involves six conserved cysteine residues that form three disulfide bonds, resulting in a cyclic cystine knot (CCK). This feature guarantees their durability when exposed to changes in temperature, chemicals, and enzymatic degradation. The two cyclotides, cycloviolacin O17 and mra30, were obtained from Viola dalatensis Gadnep through a series of techniques including the use of a 50% acetonitrile/49% miliQ water/1% formic acid solution for extraction, ammonium salt precipitation, RP-HPLC purification and sequence identification by LC-MS/MS. These cyclotides exhibit antibacterial effects on specific strains of bacteria like Staphylococcus aureus, Bacillus subtilis, and Pseudomonas aeruginosa at a concentration of 0.2 mg/mL, leading to inhibition zones ranging from 10 to 14 mm. In addition, the disulfide bonds play a crucial role in the antibacterial function of cyclotides. Disrupting the disulfide bonds through ankylation reaction results in the loss of antibacterial properties in the cyclotides (cyO17 and mra30). The minimum inhibitory concentration (MIC) values of mra30 and cyO17 are significantly low, ranging from 0.1 to 0.6 µM. These values are approximately three times lower than the MIC values observed in salt precipitation samples.
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Affiliation(s)
- Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh, Viet Nam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, 100000, Viet Nam.
| | - Tam T T Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh, Viet Nam
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh, Viet Nam
| | - Tong-Hung Quach
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh, Viet Nam
| | - Nhu T Q Ngo
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, 1A TL29, Thanh Loc Ward, District 12, Ho Chi Minh, 700000, Viet Nam
| | - Tuan H N Nguyen
- Biomedical Research Center, Pham Ngoc Thach University of Medicine, Ho Chi Minh, Viet Nam
- Department of Medical Biochemistry & Molecular Biology, Pham Ngoc Thach University of Medicine, Ho Chi Minh, Viet Nam
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3
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Sychta K, Słomka A, Shariatgorji R, Andrén PE, Samardakiewicz S, Göransson U, Slazak B. The involvement of cyclotides in the heavy metal tolerance of Viola spp. Sci Rep 2024; 14:19306. [PMID: 39164283 PMCID: PMC11336087 DOI: 10.1038/s41598-024-69018-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 07/30/2024] [Indexed: 08/22/2024] Open
Abstract
The Violaceae family is rich in metal-tolerant species and species producing cyclic peptides (cyclotides) that are linked to the resistance to biotic factors. Plants that inhabit areas polluted with heavy metals have developed various mechanisms of tolerance. To test the role of cyclotides in protection against abiotic factors, including heavy metals, cell suspension cultures of Viola species/genotypes (V. lutea ssp. westfalica, V. tricolor, V. arvensis, and V. uliginosa), representing different levels of tolerance to heavy metals (from the most tolerant-MET to the least tolerant populations/species-NMET), were used. The relative abundances of the cyclotides in the control, untreated cell suspensions of all the selected species/genotypes, and cells treated with Zn or Pb (200 µM or 2000 µM) for 24 h or 72 h were determined via MALDI-MS. Transmission electron microscopy with X-ray microanalysis was used to detect putative co-localization of the cyclotides with Zn or Pb in the cells of V. tricolor treated with the highest concentration of heavy metals for 72 h. Cyclotide biosynthesis was dependent on the type of heavy metal and its concentration, time of treatment, plant species, and population type (MET vs. NMET). It was positively correlated with the level of tolerance of particular Viola species. The increased production of cyclotides was observed in the cells of metallophyte species, mostly in Zn-treated cells. The nonmetallophyte-V. uliginosa presented a decrease in the production of cyclotides independent of the dose and duration of the metal treatment. Cyclotides co-localized with Pb more evidently than with Zn, suggesting that cyclotides have heavy metal affinity. V. lutea ssp. westfalica transcriptome mining yielded 100 cyclotide sequences, 16 known and 84 novel named viwe 1-84. These findings support the hypothesis that cyclotides are involved in certain mechanisms of plant tolerance to heavy metals.
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Affiliation(s)
- Klaudia Sychta
- Department of Plant Cytology and Embryology, Institute of Botany, Faculty of Biology, Jagiellonian University in Kraków, 9 Gronostajowa St, 30-387, Cracow, Poland.
| | - Aneta Słomka
- Department of Plant Cytology and Embryology, Institute of Botany, Faculty of Biology, Jagiellonian University in Kraków, 9 Gronostajowa St, 30-387, Cracow, Poland
| | - Reza Shariatgorji
- Department of Pharmaceutical Biosciences, Science for Life Laboratory, Spatial Mass Spectrometry, Uppsala University, P.O. Box 591, 751 24, Uppsala, Sweden
| | - Per E Andrén
- Department of Pharmaceutical Biosciences, Science for Life Laboratory, Spatial Mass Spectrometry, Uppsala University, P.O. Box 591, 751 24, Uppsala, Sweden
| | - Sławomir Samardakiewicz
- Laboratory of Electron and Confocal Microscopy, Faculty of Biology, Adam Mickiewicz University, 6 Uniwersytetu Poznańskiego St, 61-614, Poznań, Poland
| | - Ulf Göransson
- Department of Pharmaceutical Biosciences, Uppsala University, P.O. Box 574, 751 23, Uppsala, Sweden
| | - Blazej Slazak
- W. Szafer Institute of Botany of the Polish Academy of Sciences, 46 Lubicz, 31-512, Krakow, Poland
- Department of Pharmaceutical Biosciences, Uppsala University, P.O. Box 574, 751 23, Uppsala, Sweden
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Chekan JR, Mydy LS, Pasquale MA, Kersten RD. Plant peptides - redefining an area of ribosomally synthesized and post-translationally modified peptides. Nat Prod Rep 2024; 41:1020-1059. [PMID: 38411572 PMCID: PMC11253845 DOI: 10.1039/d3np00042g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Indexed: 02/28/2024]
Abstract
Covering 1965 to February 2024Plants are prolific peptide chemists and are known to make thousands of different peptidic molecules. These peptides vary dramatically in their size, chemistry, and bioactivity. Despite their differences, all plant peptides to date are biosynthesized as ribosomally synthesized and post-translationally modified peptides (RiPPs). Decades of research in plant RiPP biosynthesis have extended the definition and scope of RiPPs from microbial sources, establishing paradigms and discovering new families of biosynthetic enzymes. The discovery and elucidation of plant peptide pathways is challenging due to repurposing and evolution of housekeeping genes as both precursor peptides and biosynthetic enzymes and due to the low rates of gene clustering in plants. In this review, we highlight the chemistry, biosynthesis, and function of the known RiPP classes from plants and recommend a nomenclature for the recent addition of BURP-domain-derived RiPPs termed burpitides. Burpitides are an emerging family of cyclic plant RiPPs characterized by macrocyclic crosslinks between tyrosine or tryptophan side chains and other amino acid side chains or their peptide backbone that are formed by copper-dependent BURP-domain-containing proteins termed burpitide cyclases. Finally, we review the discovery of plant RiPPs through bioactivity-guided, structure-guided, and gene-guided approaches.
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Affiliation(s)
- Jonathan R Chekan
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA.
| | - Lisa S Mydy
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA.
| | - Michael A Pasquale
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA.
| | - Roland D Kersten
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI, USA.
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Kumar N, Bhagwat P, Singh S, Pillai S. A review on the diversity of antimicrobial peptides and genome mining strategies for their prediction. Biochimie 2024:S0300-9084(24)00157-3. [PMID: 38944107 DOI: 10.1016/j.biochi.2024.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 06/08/2024] [Accepted: 06/27/2024] [Indexed: 07/01/2024]
Abstract
Antibiotic resistance has become one of the most serious threats to human health in recent years. In response to the increasing microbial resistance to the antibiotics currently available, it is imperative to develop new antibiotics or explore new approaches to combat antibiotic resistance. Antimicrobial peptides (AMPs) have shown considerable promise in this regard, as the microbes develop low or no resistance against them. The discovery and development of AMPs still confront numerous obstacles such as finding a target, developing assays, and identifying hits and leads, which are time-consuming processes, making it difficult to reach the market. However, with the advent of genome mining, new antibiotics could be discovered efficiently using tools such as BAGEL, antiSMASH, RODEO, etc., providing hope for better treatment of diseases in the future. Computational methods used in genome mining automatically detect and annotate biosynthetic gene clusters in genomic data, making it a useful tool in natural product discovery. This review aims to shed light on the history, diversity, and mechanisms of action of AMPs and the data on new AMPs identified by traditional as well as genome mining strategies. It further substantiates the various phases of clinical trials for some AMPs, as well as an overview of genome mining databases and tools built expressly for AMP discovery. In light of the recent advancements, it is evident that targeted genome mining stands as a beacon of hope, offering immense potential to expedite the discovery of novel antimicrobials.
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Affiliation(s)
- Naveen Kumar
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P O Box 1334, Durban, 4000, South Africa.
| | - Prashant Bhagwat
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P O Box 1334, Durban, 4000, South Africa.
| | - Suren Singh
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P O Box 1334, Durban, 4000, South Africa.
| | - Santhosh Pillai
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P O Box 1334, Durban, 4000, South Africa.
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6
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Tran GH, Tran TH, Pham SH, Xuan HL, Dang TT. Cyclotides: The next generation in biopesticide development for eco-friendly agriculture. J Pept Sci 2024; 30:e3570. [PMID: 38317283 DOI: 10.1002/psc.3570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 02/07/2024]
Abstract
Chemical pesticides remain the predominant method for pest management in numerous countries. Given the current landscape of agriculture, the development of biopesticides has become increasingly crucial. The strategy empowers farmers to efficiently manage pests and diseases, while prioritizing minimal adverse effects on the environment and human health, hence fostering sustainable management. In recent years, there has been a growing interest and optimism surrounding the utilization of peptide biopesticides for crop protection. These sustainable and environmentally friendly substances have been recognized as viable alternatives to synthetic pesticides due to their outstanding environmental compatibility and efficacy. Numerous studies have been conducted to synthesize and identify peptides that exhibit activity against significant plant pathogens. One of the peptide classes is cyclotides, which are cyclic cysteine-rich peptides renowned for their wide range of sequences and functions. In this review, we conducted a comprehensive analysis of cyclotides, focusing on their structural attributes, developmental history, significant biological functions in crop protection, techniques for identification and investigation, and the application of biotechnology to enhance cyclotide synthesis. The objective is to emphasize the considerable potential of cyclotides as the next generation of plant protection agents on the global scale.
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Affiliation(s)
- Gia-Hoa Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Viet Nam
- Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Thi-Huyen Tran
- Institute of Biotechnology and Food Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Viet Nam
| | - Huy Luong Xuan
- Faculty of Pharmacy, PHENIKAA University, Hanoi, Vietnam
| | - Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, Ho Chi Minh City, Viet Nam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Viet Nam
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7
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Lian Y, Tang X, Hu G, Miao C, Cui Y, Zhangsun D, Wu Y, Luo S. Characterization and evaluation of cytotoxic and antimicrobial activities of cyclotides from Viola japonica. Sci Rep 2024; 14:9733. [PMID: 38679643 PMCID: PMC11056381 DOI: 10.1038/s41598-024-60246-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/19/2024] [Indexed: 05/01/2024] Open
Abstract
Cyclotides are a type of defense peptide most commonly found in the Violaceae family of plants, exhibiting various biological activities. In this study, we focused on the Viola japonica as our research subject and conducted transcriptome sequencing and analysis using high-throughput transcriptomics techniques. During this process, we identified 61 cyclotides, among which 25 were previously documented, while the remaining 36 were designated as vija 1 to vija 36. Mass spectrometry detection showed that 21 putative cyclotides were found in the extract of V. japonica. Through isolation, purification and tandem mass spectrometry, we characterized and investigated the activities of five cyclotides. Our results demonstrated inhibitory effects of these cyclotides on the growth of Acinetobacter baumannii and Bacillus subtilis, with minimum inhibitory concentrations (MICs) of 4.2 μM and 2.1 μM, respectively. Furthermore, time killing kinetic assays revealed that cyclotides at concentration of 4 MICs achieved completely bactericidal effects within 2 h. Additionally, fluorescence staining experiments confirmed that cyclotides disrupt microbial membranes. Moreover, cytotoxicity studies showed that cyclotides possess cytotoxic effects, with IC50 values ranging from 0.1 to 3.5 μM. In summary, the discovery of new cyclotide sequences enhances our understanding of peptide diversity and the exploration of their activity lays the foundation for a deeper investigation into the mechanisms of action of cyclotides.
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Affiliation(s)
- Yuanyuan Lian
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China
| | - Xue Tang
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China
| | - Gehui Hu
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China
| | - Chenfang Miao
- Department of Pharmacy, The 900Th Hospital of Joint Logistics Team of the PLA, Fuzhou General Clinical Medical College of Fujian Medical University, Fuzhou, China
| | - Yunfei Cui
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China
| | - Dongting Zhangsun
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China
| | - Yong Wu
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China.
| | - Sulan Luo
- Guangxi Key Laboratory of Special Biomedicine, School of Medicine, Guangxi University, Nanning, China.
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, China.
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8
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Kam A, Loo S, Qiu Y, Liu CF, Tam JP. Ultrafast Biomimetic Oxidative Folding of Cysteine-rich Peptides and Microproteins in Organic Solvents. Angew Chem Int Ed Engl 2024; 63:e202317789. [PMID: 38342764 DOI: 10.1002/anie.202317789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/07/2024] [Accepted: 02/08/2024] [Indexed: 02/13/2024]
Abstract
Disulfides in peptides and proteins are essential for maintaining a properly folded structure. Their oxidative folding is invariably performed in an aqueous-buffered solution. However, this process is often slow and can lead to misfolded products. Here, we report a novel concept and strategy that is bio-inspired to mimic protein disulfide isomerase (PDI) by accelerating disulfide exchange rates many thousand-fold. The proposed strategy termed organic oxidative folding is performed under organic solvents to yield correctly folded cysteine-rich microproteins instantaneously without observable misfolded or dead-end products. Compared to conventional aqueous oxidative folding strategies, enormously large rate accelerations up to 113,200-fold were observed. The feasibility and generality of the organic oxidative folding strategy was successfully demonstrated on 15 cysteine-rich microproteins of different hydrophobicity, lengths (14 to 58 residues), and numbers of disulfides (2 to 5 disulfides), producing the native products in a second and in high yield.
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Affiliation(s)
- Antony Kam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
- Department of Biological Sciences, Xi'an Jiaotong-Liverpool University, Wuzhong No.111, Renai Road, Suzhou, Jiangsu, 215123, People's Republic of China
| | - Shining Loo
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
- Wisedom Lake Academy of Pharmacy, Xi'an Jiaotong-Liverpool University, Wuzhong No. 111, Renai Road, Suzhou, Jiangsu, 215123, People's Republic of China
| | - Yibo Qiu
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - Chuan-Fa Liu
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
| | - James P Tam
- School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore, 637551, Singapore
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9
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Huynh NT, Ho TNT, Pham YND, Dang LH, Pham SH, Dang TT. Immunosuppressive Cyclotides: A Promising Approach for Treating Autoimmune Diseases. Protein J 2024; 43:159-170. [PMID: 38485875 DOI: 10.1007/s10930-024-10188-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2024] [Indexed: 05/01/2024]
Abstract
The immune system maintains constant surveillance to prevent the infiltration of both endogenous and exogenous threats into host organisms. The process is regulated by effector immune cells that combat external pathogens and regulatory immune cells that inhibit excessive internal body inflammation, ultimately establishing a state of homeostasis within the body. Disruption to this process could lead to autoimmunity, which is often associated with the malfunction of both T cells and B cells with T cells playing a more major role. A number of therapeutic mediators for autoimmune diseases are available, from conventional disease-modifying drugs to biologic agents and small molecule inhibitors. Recently, ribosomally synthesized peptides, specifically cyclotides from plants are currently attracting more attention as potential autoimmune disease therapeutics due to their decreased toxicity compared to small molecules inhibitors as well as their remarkable stability against a number of factors. This review provides a concise overview of various cyclotides exhibiting immunomodulatory properties and their potential as therapeutic interventions for autoimmune diseases.
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Affiliation(s)
- Nguyen Thai Huynh
- Faculty of Food Science and Technology, Ho Chi Minh City University of Industry and Trade, 140 Le Trong Tan Street, Tay Thanh Ward, Tan Phu District, Ho Chi Minh City, Vietnam
| | - Thao N T Ho
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Vietnam
| | - Yen N D Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Vietnam
| | - Le Hang Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Vietnam
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Vietnam
| | - Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, 100000, Vietnam.
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10
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Tian S, de Veer SJ, Durek T, Wang CK, Craik DJ. Nucleation of a key beta-turn promotes cyclotide oxidative folding. J Biol Chem 2024; 300:107125. [PMID: 38432638 PMCID: PMC10999817 DOI: 10.1016/j.jbc.2024.107125] [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: 11/07/2023] [Revised: 02/05/2024] [Accepted: 02/19/2024] [Indexed: 03/05/2024] Open
Abstract
Cyclotides are plant-derived peptides characterized by a head-to-tail cyclic backbone and a cystine knot motif comprised of three disulfide bonds. Formation of this motif via in vitro oxidative folding can be challenging and can result in misfolded isomers with nonnative disulfide connectivities. Here, we investigated the effect of β-turn nucleation on cyclotide oxidative folding. Two types of β-turn mimics were grafted into kalata B1, individually replacing each of the four β-turns in the folded cyclotide. Insertion of d-Pro-Gly into loop 5 was beneficial to the folding of both cyclic kB1 and a linear form of the peptide. The linear grafted analog folded four-times faster in aqueous conditions than cyclic kB1 in optimized conditions. Additionally, the cyclic analogue folded without the need for redox agents by transitioning through a native-like intermediate that was on-pathway to product formation. Kalata B1 is from the Möbius subfamily of cyclotides. Grafting d-Pro-Gly into loop 5 of cyclotides from two other subfamilies also had a beneficial effect on folding. Our findings demonstrate the importance of a β-turn nucleation site for cyclotide oxidative folding, which could be adopted as a chemical strategy to improve the in vitro folding of diverse cystine-rich peptides.
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Affiliation(s)
- Sixin Tian
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland, Australia
| | - Simon J de Veer
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland, Australia
| | - Thomas Durek
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland, Australia
| | - Conan K Wang
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland, Australia
| | - David J Craik
- Institute for Molecular Bioscience, Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Queensland, Australia.
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11
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Dang TT, Tran TTT, Tran GH, Pham SH, Nguyen THN. Cyclotides derived from Viola dalatensis Gagnep: A novel approach for enrichment and evaluation of antimicrobial activity. Toxicon 2024; 239:107606. [PMID: 38181837 DOI: 10.1016/j.toxicon.2024.107606] [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: 11/24/2023] [Revised: 12/25/2023] [Accepted: 01/03/2024] [Indexed: 01/07/2024]
Abstract
Cyclotides, plant-derived cysteine-rich peptides, exhibit a wide range of beneficial biological activities and possess exceptional structural stability. Cyclotides are commonly distributed throughout the Violaceae family. Viola dalatensis Gagnep, a Vietnamese species, has not been well studied, especially for cyclotides. This pioneering research explores cyclotides from V. dalatensis as antimicrobials. This study used a novel approach to enhance cyclotides after extraction. The approach combined 30% ammonium sulfate salt precipitation and RP-HPLC. A comprehensive analysis was performed to ascertain the overall protein content, flavonoids content, polyphenol content, and free radical scavenging capacity of compounds derived from V. dalatensis. Six known cyclotides were sequenced utilizing MS tandem. Semi-purified cyclotide mixtures (M1, M2, and M3) exhibited antibacterial efficacy against Bacillus subtilis (inhibitory diameters: 19.67-23.50 mm), Pseudomonas aeruginosa (22.17-23.50 mm), and Aspergillus flavus (14.67-21.33 mm). The enriched cyclotide precipitate from the stem extract demonstrated a minimum inhibitory concentration (MIC) of 0.08 mg/mL against P. aeruginosa, showcasing significant antibacterial effectiveness compared to the stem extract (MIC: 12.50 mg/mL). Considerable advancements have been achieved in the realm of cyclotides, specifically in their application as antimicrobial agents.
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Affiliation(s)
- Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam.
| | - Tam T T Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Gia-Hoa Tran
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Tuan H N Nguyen
- Biomedical Research Center, Pham Ngoc Thach University of Medicine, Viet Nam; Department of Medical Biochemistry & Molecular Biology, Pham Ngoc Thach University of Medicine, Viet Nam
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12
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Sharma A, Butool B, Sahu P, Mishra R, Mohanty A. In Silico Analysis of Natural Plant-Derived Cyclotides with Antifungal Activity against Pathogenic Fungi. Protein Pept Lett 2024; 31:247-260. [PMID: 38445693 DOI: 10.2174/0109298665295545240223114346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 01/22/2024] [Accepted: 01/29/2024] [Indexed: 03/07/2024]
Abstract
BACKGROUND Fungal infections in plants, animals, and humans are widespread across the world. Limited classes of antifungal drugs to treat fungal infections and loss of drug efficacy due to rapidly evolving fungal strains pose a challenge in the agriculture and health sectors. Hence, the search for a new class of antifungal agents is imperative. Cyclotides are cyclic plant peptides with multiple bioactivities, including antifungal activity. They have six conserved cysteine residues forming three disulfide linkages (CI-CIV, CII-CV, CIII-CVI) that establish a Cyclic Cystine Knot (CCK) structure, making them extremely resistant to chemical, enzymatic, and thermal attacks. AIM This in silico analysis of natural, plant-derived cyclotides aimed to assess the parameters that can assist and hasten the process of selecting the cyclotides with potent antifungal activity and prioritize them for in vivo/ in vitro experiments. OBJECTIVE The objective of this study was to conduct in silico studies to compare the physicochemical parameters, sequence diversity, surface structures, and membrane-cyclotide interactions of experimentally screened (from literature survey) potent (MIC ≤ 20 μM) and non-potent (MIC > 20 μM) cyclotides for antifungal activity. METHODOLOGY Cyclotide sequences assessed for antifungal activity were retrieved from the database (Cybase). Various online and offline tools were used for sequence-based studies, such as physicochemical parameters, sequence diversity, and neighbor-joining trees. Structure-based studies involving surface structure analysis and membrane-cyclotide interaction were also carried out. All investigations were conducted in silico. RESULTS Physicochemical parameter values, viz. isoelectric point, net charge, and the number of basic amino acids, were significantly higher in potent cyclotides compared to non-potent cyclotides. The surface structure of potent cyclotides showed a larger hydrophobic patch with a higher number of hydrophobic amino acids. Furthermore, the membrane-cyclotide interaction studies of potent cyclotides revealed lower transfer free energy (ΔG transfer) and higher penetration depth into fungal membranes, indicating higher binding stability and membrane-disruption ability. CONCLUSION These in silico studies can be applied for rapidly identifying putatively potent antifungal cyclotides for in vivo and in vitro experiments, which will ultimately be relevant in the agriculture and pharmaceutical sectors.
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Affiliation(s)
- Akshita Sharma
- Department of Botany, Gargi College, University of Delhi, Delhi, India
| | - Bisma Butool
- Department of Botany, Gargi College, University of Delhi, Delhi, India
| | - Pallavi Sahu
- Department of Botany, Gargi College, University of Delhi, Delhi, India
| | - Reema Mishra
- Department of Botany, Gargi College, University of Delhi, Delhi, India
| | - Aparajita Mohanty
- Department of Botany, Gargi College, University of Delhi, Delhi, India
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13
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Batiha GES, Lukman HY, Shaheen HM, Wasef L, Hafiz AA, Conte-Junior CA, Al-Farga A, Chamba MVM, Lawal B. A Systematic Review of Phytochemistry, Nutritional Composition, and Pharmacologic Application of Species of the Genus Viola in Noncommunicable Diseases (NCDs). EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2023; 2023:5406039. [PMID: 37941895 PMCID: PMC10630019 DOI: 10.1155/2023/5406039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 06/03/2023] [Accepted: 10/11/2023] [Indexed: 11/10/2023]
Abstract
Viola L. is the largest genus of the Violaceae family with more than 500 species across the globe. The present extensive literature survey revealed Viola species to be a group of important nutritional and medicinal plants used for the ethnomedicinal treatment of noncommunicable diseases (NCDs) such as diabetes, asthma, lung diseases, and fatigue. Many plant species of this genus have also received scientific validation of their pharmacological activities including neuroprotective, immunomodulatory, anticancer, antihypertensive, antidyslipidemic, analgesic, antipyretic, diuretic, anti-inflammatory, anthelmintic, and antioxidant. Viola is highly rich in different natural products some of which have been isolated and identified in the past few decades; these include flavonoids terpenoids and phenylpropanoids of different pharmacological activities. The pharmacokinetics and clinical studies on this genus are lacking, and the present review is aimed at summarizing the current understanding of the ethnopharmacology, phytochemistry, nutritional composition, and pharmacological profile of medicinal plants from the Viola genus to reveal its therapeutic potentials, gaps, and subsequently open a new window for future pharmacological research.
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Affiliation(s)
- Gaber El-Saber Batiha
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, AlBeheira, Egypt
| | - Halimat Yusuf Lukman
- Department of Chemical Sciences, Biochemistry Unit, College of Natural and Applied Sciences, Summit University Offa, Offa PMB 4412, Nigeria
| | - Hazem M. Shaheen
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, AlBeheira, Egypt
| | - Lamiaa Wasef
- Department of Pharmacology and Therapeutics, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511, AlBeheira, Egypt
| | - Amin A. Hafiz
- Department of Clinical Nutrition, Faculty of Applied Medical Sciences, Umm Al-Qura University, Mecca, Saudi Arabia
| | - Carlos Adam Conte-Junior
- Laboratory of Advanced Analysis in Biochemistry and Molecular Biology (LAABBM), Department of Biochemistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro RJ 21941-909, Brazil
| | - Ammar Al-Farga
- Biochemistry Department, Faculty of Science, University of Jeddah, Jeddah 21577, Saudi Arabia
| | - Moses V. M. Chamba
- Department of Physics and Biochemical Sciences, Malawi University of Business and Applied Sciences, Private Bag 303, Chichiri, Blantyre 3, Malawi
| | - Bashir Lawal
- Faculty of Medical Science, New Gate University, Minna, Nigeria
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14
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Karami Y, Murail S, Giribaldi J, Lefranc B, Defontaine F, Lesouhaitier O, Leprince J, de Vries S, Tufféry P. Exploring a Structural Data Mining Approach to Design Linkers for Head-to-Tail Peptide Cyclization. J Chem Inf Model 2023; 63:6436-6450. [PMID: 37827517 PMCID: PMC10599322 DOI: 10.1021/acs.jcim.3c00865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Indexed: 10/14/2023]
Abstract
Peptides have recently regained interest as therapeutic candidates, but their development remains confronted with several limitations including low bioavailability. Backbone head-to-tail cyclization, i.e., setting a covalent peptide bond linking the last amino acid with the first one, is one effective strategy of peptide-based drug design to stabilize the conformation of bioactive peptides while preserving peptide properties in terms of low toxicity, binding affinity, target selectivity, and preventing enzymatic degradation. Starting from an active peptide, it usually requires the design of a linker of a few amino acids to make it possible to cyclize the peptide, possibly preserving the conformation of the initial peptide and not affecting its activity. However, very little is known about the sequence-structure relationship requirements of designing linkers for peptide cyclization in a rational manner. Recently, we have shown that large-scale data-mining of available protein structures can lead to the precise identification of protein loop conformations, even from remote structural classes. Here, we transpose this approach to linkers, allowing head-to-tail peptide cyclization. First we show that given a linker sequence and the conformation of the linear peptide, it is possible to accurately predict the cyclized peptide conformation. Second, and more importantly, we show that it seems possible to elaborate on the information inferred from protein structures to propose effective candidate linker sequences constrained by length and amino acid composition, providing the first framework for the rational design of head-to-tail cyclization linkers. Finally, we illustrate this for two peptides using a limited set of amino-acids likely not to interfere with peptide function. For a linear peptide derived from Nrf2, the peptide cyclized starting from the experimental structure showed a 26-fold increase in the binding affinity. For urotensin II, a peptide already cyclized by a disulfide bond that exerts a broad array of biological activities, we were able, starting from models of the structure, to design a head-to-tail cyclized peptide, the first synthesized bicyclic 14-residue long urotensin II analogue, showing a retention of in vitro activity. Although preliminary, our results strongly suggest that such an approach has strong potential for cyclic peptide-based drug design.
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Affiliation(s)
- Yasaman Karami
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Samuel Murail
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Julien Giribaldi
- Institut
des Biomolécules Max Mousseron, UMR 5247, Université de Montpellier-CNRS, 34293 Montpellier, France
| | - Benjamin Lefranc
- Université
de Rouen Normandie, INSERM U1239 NorDiC, Neuroendocrine, Endocrine and Germinal Differentiation and Communication,
INSERM US51 HeRacLeS, F-76000 Rouen, France
| | - Florian Defontaine
- Université
de Rouen Normandie, UR CBSA, Research Unit
Bacterial Communication and Anti-infectious Strategies, 27000 Evreux, France
| | - Olivier Lesouhaitier
- Université
de Rouen Normandie, UR CBSA, Research Unit
Bacterial Communication and Anti-infectious Strategies, 27000 Evreux, France
| | - Jérôme Leprince
- Université
de Rouen Normandie, INSERM U1239 NorDiC, Neuroendocrine, Endocrine and Germinal Differentiation and Communication,
INSERM US51 HeRacLeS, F-76000 Rouen, France
| | - Sjoerd de Vries
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
| | - Pierre Tufféry
- Université
Paris Cité, CNRS UMR 8251,
INSERM ERL U1133, 75013 Paris, France
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15
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Mourenza A, Ganesan R, Camarero JA. Resistance is futile: targeting multidrug-resistant bacteria with de novo Cys-rich cyclic polypeptides. RSC Chem Biol 2023; 4:722-735. [PMID: 37799576 PMCID: PMC10549238 DOI: 10.1039/d3cb00015j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 07/27/2023] [Indexed: 10/07/2023] Open
Abstract
The search for novel antimicrobial agents to combat microbial pathogens is intensifying in response to rapid drug resistance development to current antibiotic therapeutics. The use of disulfide-rich head-to-tail cyclized polypeptides as molecular frameworks for designing a new type of peptide antibiotics is gaining increasing attention among the scientific community and the pharmaceutical industry. The use of macrocyclic peptides, further constrained by the presence of several disulfide bonds, makes these peptide frameworks remarkably more stable to thermal, biological, and chemical degradation showing better activities when compared to their linear analogs. Many of these novel peptide scaffolds have been shown to have a high tolerance to sequence variability in those residues not involved in disulfide bonds, able to cross biological membranes, and efficiently target complex biomolecular interactions. Hence, these unique properties make the use of these scaffolds ideal for many biotechnological applications, including the design of novel peptide antibiotics. This article provides an overview of the new developments in the use of several disulfide-rich cyclic polypeptides, including cyclotides, θ-defensins, and sunflower trypsin inhibitor peptides, among others, in the development of novel antimicrobial peptides against multidrug-resistant bacteria.
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Affiliation(s)
- Alvaro Mourenza
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy Los Angeles CA90033 USA +1-(323) 442-1417
| | - Rajasekaran Ganesan
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy Los Angeles CA90033 USA +1-(323) 442-1417
| | - Julio A Camarero
- Department of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School of Pharmacy Los Angeles CA90033 USA +1-(323) 442-1417
- Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California Los Angeles CA90033 USA
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16
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To J, Zhang X, Tam JP. Design of Potent and Salt-Insensitive Antimicrobial Branched Peptides. Polymers (Basel) 2023; 15:3594. [PMID: 37688220 PMCID: PMC10489980 DOI: 10.3390/polym15173594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/24/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
Dendrimeric and branched peptides are polypeptides formed by diverse types of scaffolds to give them different forms. Previously, we reported a cascade-type, Lys-scaffolded antimicrobial peptide dendrimer D4R tethered with four RLYR tetrapeptides. Antimicrobial D4R is broad-spectrum, salt insensitive, and as potent as the natural-occurring tachyplesins, displaying minimum inhibitory concentrations (MIC) < 1 μM. However, the relationships between scaffolds and antimicrobial potency remain undefined. Here, we report the design of four novel types of peptide antimicrobials whose scaffolded backbones are lysine (Lys), iso-Lys, ornithine (Orn), or iso-Orn tethered with RLYR on their α- or sidechain-amines to give ε-, δ-, and their α-branched peptides. When assayed against ten microorganisms, the Lys-scaffolded α- and ε-branched peptides are broadly active, salt insensitive, and as potent as D4R and tachyplesins, whereas the corresponding Orn-scaffolded α- and δ-branched peptides are salt sensitive and much less potent, displaying MICs ranging from 1 to >500 μM. Structure-activity relationship studies suggested that Lys-scaffolds, but not Orn-scaffolds, can support a reverse turn to organize RLYR tetrapeptides as parallel β-strands to form an amphipathic structure with Leu-Tyr as a hydrophobic core. Together, these results provide a structural approach for designing potent and salt-insensitive dendrimeric or branched peptide antimicrobials.
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Affiliation(s)
| | | | - James P. Tam
- Synzymes and Natural Products Center (SYNC), School of Biological Sciences, Nanyang Technological University, 60 Nanyang Drive, Singapore 637551, Singapore
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17
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Trejos M, Aristizabal Y, Aragón-Muriel A, Oñate-Garzón J, Liscano Y. Characterization and Classification In Silico of Peptides with Dual Activity (Antimicrobial and Wound Healing). Int J Mol Sci 2023; 24:13091. [PMID: 37685896 PMCID: PMC10487549 DOI: 10.3390/ijms241713091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/14/2023] [Accepted: 08/21/2023] [Indexed: 09/10/2023] Open
Abstract
The growing challenge of chronic wounds and antibiotic resistance has spotlighted the potential of dual-function peptides (antimicrobial and wound healing) as novel therapeutic strategies. The investigation aimed to characterize and correlate in silico the physicochemical attributes of these peptides with their biological activity. We sourced a dataset of 207 such peptides from various peptide databases, followed by a detailed analysis of their physicochemical properties using bioinformatic tools. Utilizing statistical tools like clustering, correlation, and principal component analysis (PCA), patterns and relationships were discerned among these properties. Furthermore, we analyzed the peptides' functional domains for insights into their potential mechanisms of action. Our findings spotlight peptides in Cluster 2 as efficacious in wound healing, whereas Cluster 1 peptides exhibited pronounced antimicrobial potential. In our study, we identified specific amino acid patterns and peptide families associated with their biological activities, such as the cecropin antimicrobial domain. Additionally, we found the presence of polar amino acids like arginine, cysteine, and lysine, as well as apolar amino acids like glycine, isoleucine, and leucine. These characteristics are crucial for interactions with bacterial membranes and receptors involved in migration, proliferation, angiogenesis, and immunomodulation. While this study provides a groundwork for therapeutic development, translating these findings into practical applications necessitates additional experimental and clinical research.
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Affiliation(s)
- María Trejos
- Grupo de Investigación en Salud Integral (GISI), Departamento Facultad de Salud, Universidad Santiago de Cali, Cali 760035, Colombia;
| | - Yesid Aristizabal
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Cali 760035, Colombia; (Y.A.); (J.O.-G.)
| | - Alberto Aragón-Muriel
- Laboratorio de Investigación en Catálisis y Procesos (LICAP), Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad del Valle, Cali 760001, Colombia;
- Grupo de Investigación e Innovación en Biotecnología (BITI), Tecnoparque Nodo Valle, Servicio Nacional de Aprendizaje (SENA), Cali 760044, Colombia
| | - José Oñate-Garzón
- Grupo de Investigación en Química y Biotecnología (QUIBIO), Facultad de Ciencias Básicas, Universidad Santiago de Cali, Cali 760035, Colombia; (Y.A.); (J.O.-G.)
| | - Yamil Liscano
- Grupo de Investigación en Salud Integral (GISI), Departamento Facultad de Salud, Universidad Santiago de Cali, Cali 760035, Colombia;
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18
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Ho TNT, Turner A, Pham SH, Nguyen HT, Nguyen LTT, Nguyen LT, Dang TT. Cysteine-rich peptides: From bioactivity to bioinsecticide applications. Toxicon 2023; 230:107173. [PMID: 37211058 DOI: 10.1016/j.toxicon.2023.107173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 05/23/2023]
Abstract
Greater levels of insect resistance and constraints on the use of current pesticides have recently led to increased crop losses in agricultural production. Further, the health and environmental impacts of pesticides now restrict their application. Biologics based on peptides are gaining popularity as efficient crop protection agents with low environmental toxicity. Cysteine-rich peptides (whether originated from venoms or plant defense substances) are chemically stable and effective as insecticides in agricultural applications. Cysteine-rich peptides fulfill the stability and efficacy requirements for commercial uses and provide an environmentally benign alternative to small-molecule insecticides. In this article, cysteine-rich insecticidal peptide classes identified from plants and venoms will be highlighted, focusing on their structural stability, bioactivity and production.
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Affiliation(s)
- Thao N T Ho
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - A Turner
- Molecular Biology Department, University of Texas, 100 E 24th St. Austin, USA
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Ha T Nguyen
- National Key Laboratory of Polymer and Composite Materials, Department of Energy Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Linh T T Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 280 an Duong Vuong Street, District 5, Ho Chi Minh City, Viet Nam
| | - Luan T Nguyen
- National Key Laboratory of Polymer and Composite Materials, Department of Energy Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam; Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam.
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19
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Ho TNT, Pham SH, Nguyen LTT, Nguyen HT, Nguyen LT, Dang TT. Insights into the synthesis strategies of plant-derived cyclotides. Amino Acids 2023:10.1007/s00726-023-03271-8. [PMID: 37142771 DOI: 10.1007/s00726-023-03271-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 04/18/2023] [Indexed: 05/06/2023]
Abstract
Cyclotides are plant peptides characterized with a head-to-tail cyclized backbone and three interlocking disulfide bonds, known as a cyclic cysteine knot. Despite the variations in cyclotides peptide sequences, this core structure is conserved, underlying their most useful feature: stability against thermal and chemical breakdown. Cyclotides are the only natural peptides known to date that are orally bioavailable and able to cross cell membranes. Cyclotides also display bioactivities that have been exploited and expanded to develop as potential therapeutic reagents for a wide range of conditions (e.g., HIV, inflammatory conditions, multiple sclerosis, etc.). As such, in vitro production of cyclotides is of the utmost importance since it could assist further research on this peptide class, specifically the structure-activity relationship and its mechanism of action. The information obtained could be utilized to assist drug development and optimization. Here, we discuss several strategies for the synthesis of cyclotides using both chemical and biological routes.
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Affiliation(s)
- Thao N T Ho
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Son H Pham
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam
| | - Linh T T Nguyen
- Department of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District 5, Ho Chi Minh City, Viet Nam
| | - Ha T Nguyen
- National Key Laboratory of Polymer and Composite Materials, Department of Energy Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Luan T Nguyen
- National Key Laboratory of Polymer and Composite Materials, Department of Energy Materials, Faculty of Materials Technology, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City, Viet Nam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Viet Nam
| | - Tien T Dang
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, 1B TL29, District 12, Ho Chi Minh City, Viet Nam.
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20
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Tyler TJ, Durek T, Craik DJ. Native and Engineered Cyclic Disulfide-Rich Peptides as Drug Leads. Molecules 2023; 28:molecules28073189. [PMID: 37049950 PMCID: PMC10096437 DOI: 10.3390/molecules28073189] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 04/07/2023] Open
Abstract
Bioactive peptides are a highly abundant and diverse group of molecules that exhibit a wide range of structural and functional variation. Despite their immense therapeutic potential, bioactive peptides have been traditionally perceived as poor drug candidates, largely due to intrinsic shortcomings that reflect their endogenous heritage, i.e., short biological half-lives and poor cell permeability. In this review, we examine the utility of molecular engineering to insert bioactive sequences into constrained scaffolds with desired pharmaceutical properties. Applying lessons learnt from nature, we focus on molecular grafting of cyclic disulfide-rich scaffolds (naturally derived or engineered), shown to be intrinsically stable and amenable to sequence modifications, and their utility as privileged frameworks in drug design.
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Affiliation(s)
- Tristan J. Tyler
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Thomas Durek
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
| | - David J. Craik
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
- Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, QLD 4072, Australia
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21
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Julca I, Mutwil-Anderwald D, Manoj V, Khan Z, Lai SK, Yang LK, Beh IT, Dziekan J, Lim YP, Lim SK, Low YW, Lam YI, Tjia S, Mu Y, Tan QW, Nuc P, Choo LM, Khew G, Shining L, Kam A, Tam JP, Bozdech Z, Schmidt M, Usadel B, Kanagasundaram Y, Alseekh S, Fernie A, Li HY, Mutwil M. Genomic, transcriptomic, and metabolomic analysis of Oldenlandia corymbosa reveals the biosynthesis and mode of action of anti-cancer metabolites. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2023. [PMID: 36807520 DOI: 10.1111/jipb.13469] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 02/18/2023] [Indexed: 06/18/2023]
Abstract
Plants accumulate a vast array of secondary metabolites, which constitute a natural resource for pharmaceuticals. Oldenlandia corymbosa belongs to the Rubiaceae family, and has been used in traditional medicine to treat different diseases, including cancer. However, the active metabolites of the plant, their biosynthetic pathway and mode of action in cancer are unknown. To fill these gaps, we exposed this plant to eight different stress conditions and combined different omics data capturing gene expression, metabolic profiles, and anti-cancer activity. Our results show that O. corymbosa extracts are active against breast cancer cell lines and that ursolic acid is responsible for this activity. Moreover, we assembled a high-quality genome and uncovered two genes involved in the biosynthesis of ursolic acid. Finally, we also revealed that ursolic acid causes mitotic catastrophe in cancer cells and identified three high-confidence protein binding targets by Cellular Thermal Shift Assay (CETSA) and reverse docking. Altogether, these results constitute a valuable resource to further characterize the biosynthesis of active metabolites in the Oldenlandia group, while the mode of action of ursolic acid will allow us to further develop this valuable compound.
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Affiliation(s)
- Irene Julca
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | | | - Vaishnervi Manoj
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Zahra Khan
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Soak Kuan Lai
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Lay K Yang
- Shared Analytics, Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research (A*STAR), Singapore, 138671, Singapore
| | - Ing T Beh
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Jerzy Dziekan
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yoon P Lim
- Department of Biochemistry, National University of Singapore, Singapore, 117596, Singapore
| | - Shen K Lim
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
- Department of Biochemistry, National University of Singapore, Singapore, 117596, Singapore
| | - Yee W Low
- Singapore Botanic Gardens, Singapore, 259569, Singapore
| | - Yuen I Lam
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Seth Tjia
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Yuguang Mu
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Qiao W Tan
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Przemyslaw Nuc
- Department of Gene Expression, Faculty of Biology, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Poznan, 61-614, Poland
| | - Le M Choo
- Singapore Botanic Gardens, Singapore, 259569, Singapore
| | - Gillian Khew
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
- Singapore Botanic Gardens, Singapore, 259569, Singapore
| | - Loo Shining
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Antony Kam
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - James P Tam
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Zbynek Bozdech
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | | | - Bjoern Usadel
- IBG-4 Bioinformatics, Forschungszentrum Jülich, Jülich, 52428, Germany
| | - Yoganathan Kanagasundaram
- Shared Analytics, Singapore Institute of Food and Biotechnology Innovation (SIFBI), Agency for Science, Technology and Research (A*STAR), Singapore, 138671, Singapore
| | - Saleh Alseekh
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm, 14476, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv, 4000, Bulgaria
| | - Alisdair Fernie
- Max-Planck-Institut für Molekulare Pflanzenphysiologie, Potsdam-Golm, 14476, Germany
- Center of Plant Systems Biology and Biotechnology, Plovdiv, 4000, Bulgaria
| | - Hoi Y Li
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
| | - Marek Mutwil
- School of Biological Sciences, Nanyang Technological University, Singapore, 639798, Singapore
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22
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Rajendran S, Slazak B, Mohotti S, Muhammad T, Strömstedt AA, Kapusta M, Wilmowicz E, Göransson U, Hettiarachchi CM, Gunasekera S. Screening for Cyclotides in Sri Lankan Medicinal Plants: Discovery, Characterization, and Bioactivity Screening of Cyclotides from Geophila repens. JOURNAL OF NATURAL PRODUCTS 2023; 86:52-65. [PMID: 36525646 PMCID: PMC9887600 DOI: 10.1021/acs.jnatprod.2c00674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Indexed: 06/17/2023]
Abstract
Cyclotides are an intriguing class of structurally stable circular miniproteins of plant origin with numerous potential pharmaceutical and agricultural applications. To investigate the occurrence of cyclotides in Sri Lankan flora, 50 medicinal plants were screened, leading to the identification of a suite of new cyclotides from Geophila repens of the family Rubiaceae. Cycloviolacin O2-like (cyO2-like) gere 1 and the known cyclotide kalata B7 (kB7) were among the cyclotides characterized at the peptide and/or transcript level together with several putative enzymes, likely involved in cyclotide biosynthesis. Five of the most abundant cyclotides were isolated, sequenced, structurally characterized, and screened in antimicrobial and cytotoxicity assays. All gere cyclotides showed cytotoxicity (IC50 of 2.0-10.2 μM), but only gere 1 inhibited standard microbial strains at a minimum inhibitory concentration of 4-16 μM. As shown by immunohistochemistry, large quantities of the cyclotides were localized in the epidermis of the leaves and petioles of G. repens. Taken together with the cytotoxicity and membrane permeabilizing activities, this implicates gere cyclotides as potential plant defense molecules. The presence of cyO2-like gere 1 in a plant in the Rubiaceae supports the notion that phylogenetically distant plants may have coevolved to express similar cytotoxic cyclotides for a specific functional role, most likely involving host defense.
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Affiliation(s)
- Sanjeevan Rajendran
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
- Department
of Chemistry, Faculty of Science, University
of Colombo, Thurstan Road, Colombo 00300, Sri Lanka
| | - Blazej Slazak
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
- W.
Szafer Institute of Botany of the Polish Academy of Sciences, 46 Lubicz, 31-512 Cracow, Poland
| | - Supun Mohotti
- Department
of Chemistry, Faculty of Science, University
of Colombo, Thurstan Road, Colombo 00300, Sri Lanka
| | - Taj Muhammad
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
| | - Adam A. Strömstedt
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
| | - Małgorzata Kapusta
- Department
of Plant Cytology and Embryology, Faculty of Biology, University of Gdańsk, 59 Wita Stwosza, 80-308 Gdańsk, Poland
| | - Emilia Wilmowicz
- Faculty
of Biological and Veterinary Sciences, Nicolaus
Copernicus University, 1 Lwowska Street, 87-100 Toruń, Poland
| | - Ulf Göransson
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
| | - Chamari M. Hettiarachchi
- Department
of Chemistry, Faculty of Science, University
of Colombo, Thurstan Road, Colombo 00300, Sri Lanka
| | - Sunithi Gunasekera
- Phamacognosy,
Department of Pharmaceutical Biosciences, Uppsala University, Biomedical Centre, SE 75124 Uppsala, Sweden
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23
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Mehta L, Shambhawi, Kumar S, Mohanty A. In silico Analysis of Native Cyclotides with Antibacterial Activity against Gram-negative Bacteria. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822060096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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24
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Attah FA, Lawal BA, Yusuf AB, Adedeji OJ, Folahan JT, Akhigbe KO, Roy T, Lawal AA, Ogah NB, Olorundare OE, Chamcheu JC. Nutritional and Pharmaceutical Applications of Under-Explored Knottin Peptide-Rich Phytomedicines. PLANTS (BASEL, SWITZERLAND) 2022; 11:3271. [PMID: 36501311 PMCID: PMC9737898 DOI: 10.3390/plants11233271] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 11/02/2022] [Accepted: 11/24/2022] [Indexed: 06/17/2023]
Abstract
Phytomedicines reportedly rich in cystine knot peptides (Knottins) are found in several global diets, food/herbal supplements and functional foods. However, their knottin peptide content has largely been unexplored, notably for their emerging dual potentials at both the food and medicine space. The nutritional roles, biological targets and mechanism(s) of activity of these knotted peptides are largely unknown. Meanwhile, knottins have recently been unveiled as emerging peptide therapeutics and nutraceuticals of primary choice due to their broad spectrum of bioactivity, hyper stability, selective toxicity, impressive selectivity for biomolecular targets, and their bioengineering applications. In addition to their potential dietary benefits, some knottins have displayed desirable limited toxicity to human erythrocytes. In an effort to appraise what has been accomplished, unveil knowledge gaps and explore the future prospects of knottins, an elaborate review of the nutritional and pharmaceutical application of phytomedicines rich in knottins was carried out. Herein, we provide comprehensive data on common dietary and therapeutic knottins, the majority of which are poorly investigated in many food-grade phytomedicines used in different cultures and localities. Findings from this review should stimulate scientific interest to unveil novel dietary knottins and knottin-rich nutraceutical peptide drug candidates/leads with potential for future clinical application.
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Affiliation(s)
- Francis Alfred Attah
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Bilqis Abiola Lawal
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Abdulmalik Babatunde Yusuf
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Oluwakorede Joshua Adedeji
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Joy Temiloluwa Folahan
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana-Monroe, Monroe, LA 71209, USA
| | - Kelvin Oluwafemi Akhigbe
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Tithi Roy
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana-Monroe, Monroe, LA 71209, USA
| | - Azeemat Adeola Lawal
- Department of Pharmacognosy and Drug Development, Faculty of Pharmaceutical Sciences, University of Ilorin, Ilorin 240272, Nigeria
| | - Ngozi Blessing Ogah
- Department of Biotechnology, Ebonyi State University, Abakaliki 480101, Nigeria
| | | | - Jean Christopher Chamcheu
- School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana-Monroe, Monroe, LA 71209, USA
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25
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Jacob B, Vogelaar A, Cadenas E, Camarero JA. Using the Cyclotide Scaffold for Targeting Biomolecular Interactions in Drug Development. Molecules 2022; 27:molecules27196430. [PMID: 36234971 PMCID: PMC9570680 DOI: 10.3390/molecules27196430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/21/2022] [Accepted: 09/24/2022] [Indexed: 11/28/2022] Open
Abstract
This review provides an overview of the properties of cyclotides and their potential for developing novel peptide-based therapeutics. The selective disruption of protein–protein interactions remains challenging, as the interacting surfaces are relatively large and flat. However, highly constrained polypeptide-based molecular frameworks with cell-permeability properties, such as the cyclotide scaffold, have shown great promise for targeting those biomolecular interactions. The use of molecular techniques, such as epitope grafting and molecular evolution employing the cyclotide scaffold, has shown to be highly effective for selecting bioactive cyclotides.
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Affiliation(s)
- Binu Jacob
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 9033, USA
| | - Alicia Vogelaar
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 9033, USA
| | - Enrique Cadenas
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 9033, USA
| | - Julio A. Camarero
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 9033, USA
- Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 9033, USA
- Correspondence:
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26
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The Updated Review on Plant Peptides and Their Applications in Human Health. Int J Pept Res Ther 2022; 28:135. [PMID: 35911180 PMCID: PMC9326430 DOI: 10.1007/s10989-022-10437-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/20/2022] [Indexed: 11/30/2022]
Abstract
Biologically active plant peptides, consisting of secondary metabolites, are compounds (amino acids) utilized by plants in their defense arsenal. Enzymatic processes and metabolic pathways secrete these plant peptides. They are also known for their medicinal value and have been incorporated in therapeutics of major human diseases. Nevertheless, its limitations (low bioavailability, high cytotoxicity, poor absorption, low abundance, improper metabolism, etc.) have demanded a need to explore further and discover other new plant compounds that overcome these limitations. Keeping this in mind, therapeutic plant proteins can be excellent remedial substitutes for bodily affliction. A multitude of these peptides demonstrates anti-carcinogenic, anti-microbial, anti-HIV, and neuro-regulating properties. This article's main aim is to list out and report the status of various therapeutic plant peptides and their prospective status as peptide-based drugs for multiple diseases (infectious and non-infectious). The feasibility of these compounds in the imminent future has also been discussed.
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27
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Attah FA, Mbanu AE, Chukwudulue UM, Jonah UJ, Njinga NS. Ethnopharmacology, phytochemistry and a new chemotaxonomic marker in Oldenlandia affinis (Roem. & Schult.) DC. Rubiaceae. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2021-0196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The proper documentation of ethnopharmacological application of widely used indigenous plants and their phytochemical analysis has positively impacted the drug discovery pipeline. Medicinal plants with potential commercial value and prospects for clinical application need to be properly identified and authenticated to avoid confusion, adulteration and substitution. Oldenlandia affinis (OA) has continued to attract scientific attention following the discovery of extremely stable cyclotides (circular peptides) that are not expressed in many investigated members of the contentious genus, Oldenlandia (synonym – Hedyotis); yet there is a lack of an elaborate review covering some broader aspects of its traditional uses, ethnopharmacology and phytochemistry of the species. More importantly, the age long but lingering confusion and taxonomic inconsistencies common to the Oldenlandia–Hedyotis debate could foster species mismatching, increase cases of misidentification, promote adulteration of OA and thereby limit its proper clinical application. Here, we aim to reveal the extent of indigenous use of and research on OA from 1960 till date, unveil knowledge gaps, document hitherto unknown traditional applications, ethnopharmacological uses, pharmacological properties, and reported phytochemical profile. In addition, to encourage proper selection and utilization of genuine crude drug, the chemotaxonomically important phytoconstituents of OA have been presented and the modern approach of chemophenetic study of OA proposed to resolve the lack of consensus in the taxonomy of OA as well as the morphologically and anatomically close members of the taxon. The abundant cyclotide expression in OA represents a new chemotaxonomic marker for its unambiguous identification, utilization and reproducibility of research findings on the species.
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Affiliation(s)
- Francis Alfred Attah
- Department of Pharmacognosy and Drug development, Faculty of Pharmaceutical Sciences , University of Ilorin , Ilorin , Kwara State , Nigeria
| | - Augustine E. Mbanu
- Department of Pharmacognosy, Faculty of Pharmacy , University of Ibadan , Ibadan , Nigeria
| | | | | | - Ngaitad S. Njinga
- Department of Pharmaceutical and Medicinal Chemistry , University of Ilorin , Ilorin , Nigeria
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28
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Protocols for measuring the stability and cytotoxicity of cyclotides. Methods Enzymol 2022; 663:19-40. [PMID: 35168789 DOI: 10.1016/bs.mie.2021.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Cyclotides are plant host-defense peptides that have a wide range of biological activities and have diverse potential applications in medicine and agriculture. These 27-37 amino acid peptides have a head-to-tail cyclic backbone and are built around a cystine knot core, which makes them exceptionally stable. This stability and their amenability to sequence modifications has made cyclotides attractive scaffolds in drug design, and many synthetic cyclotides have now been designed and synthesized to test their efficacy as leads for a wide range of diseases, including infectious disease, cancer, pain and multiple sclerosis. Additionally, some natural cyclotides are selectively toxic to certain cancer cell lines, opening their potential as anticancer agents, and others have insecticidal activity, with applications in crop protection. With these applications in mind, there is a need to be able to measure cyclotides in pharmaceutical or agrichemical formulations and in biological media such as blood serum, as well as to assess their potential persistence in the environment when used as agrichemical agents. This chapter describes protocols for quantifying cyclotides in biological fluids, measuring their stability, and assessing their relative cytotoxicity on various types of cells.
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29
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Gupta R, Kumari J, Pati S, Singh S, Mishra M, Ghosh SK. Interaction of cyclotide Kalata B1 protein with model cellular membranes of varied electrostatics. Int J Biol Macromol 2021; 191:852-860. [PMID: 34592223 DOI: 10.1016/j.ijbiomac.2021.09.147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/27/2022]
Abstract
A uni-molecular layer of lipids at air-water interface mimicking one of the leaflets of the cellular membrane provides a simple model to understand the interaction of any foreign molecules with the membrane. Here, the interactions of protein Kalata B1 (KB1) of cyclotide family with the phospholipids 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC), 1,2-dipalmitoyl-sn-glycero-3-phospho-rac-(1-glycerol) sodium salt (DPPG), and 1,2-distearoyl-sn-glycero-3-ethylphosphocholine chloride salt (DSEPC) have been investigated. The addition of KB1 induces a change in pressure of the lipid monolayers. The characteristic time of the change in pressure is found to be dependent on the electrostatic nature of the lipid. Even though the protein is weakly surface active, it is capable of modifying the phase behavior and elastic properties of lipid monolayers with differences in their strength and nature making the layers more floppy. The KB1-lipid interaction has been quantified by calculating the excess Gibb's free energy of interaction and the 1-anilino-8-naphthalenesulfonate (ANS) binding studies. The interaction with zwitterionic DPPC and negatively charged DPPG lipids are found to be thermodynamically favorable whereas the protein shows a weaker response to positively charged DSEPC lipid. Therefore, the long ranged electrostatic is the initial driving force for the KB1 to recognize and subsequently attach to a cellular membrane. Thereafter, the hydrophobic region of the protein may penetrate into the hydrophobic core of the membrane via specific amino acid residues.
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Affiliation(s)
- Ritika Gupta
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| | - Jyoti Kumari
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| | - Soumya Pati
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India
| | - Shailja Singh
- Special Center for Molecular Medicine, Jawaharlal Nehru university, New Delhi 110067, India
| | - Manasi Mishra
- Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India.
| | - Sajal K Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Tehsil Dadri, G. B. Nagar, Uttar Pradesh 201314, India.
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30
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Bin Hafeez A, Jiang X, Bergen PJ, Zhu Y. Antimicrobial Peptides: An Update on Classifications and Databases. Int J Mol Sci 2021; 22:11691. [PMID: 34769122 PMCID: PMC8583803 DOI: 10.3390/ijms222111691] [Citation(s) in RCA: 111] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/24/2021] [Accepted: 10/25/2021] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial peptides (AMPs) are distributed across all kingdoms of life and are an indispensable component of host defenses. They consist of predominantly short cationic peptides with a wide variety of structures and targets. Given the ever-emerging resistance of various pathogens to existing antimicrobial therapies, AMPs have recently attracted extensive interest as potential therapeutic agents. As the discovery of new AMPs has increased, many databases specializing in AMPs have been developed to collect both fundamental and pharmacological information. In this review, we summarize the sources, structures, modes of action, and classifications of AMPs. Additionally, we examine current AMP databases, compare valuable computational tools used to predict antimicrobial activity and mechanisms of action, and highlight new machine learning approaches that can be employed to improve AMP activity to combat global antimicrobial resistance.
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Affiliation(s)
- Ahmer Bin Hafeez
- Centre of Biotechnology and Microbiology, University of Peshawar, Peshawar 25120, Pakistan;
| | - Xukai Jiang
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
- National Glycoengineering Research Center, Shandong University, Qingdao 266237, China
| | - Phillip J. Bergen
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
| | - Yan Zhu
- Infection and Immunity Program, Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; (X.J.); (P.J.B.)
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31
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Nunes LGP, Reichert T, Machini MT. His-Rich Peptides, Gly- and His-Rich Peptides: Functionally Versatile Compounds with Potential Multi-Purpose Applications. Int J Pept Res Ther 2021. [DOI: 10.1007/s10989-021-10302-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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32
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Zakaryan H, Chilingaryan G, Arabyan E, Serobian A, Wang G. Natural antimicrobial peptides as a source of new antiviral agents. J Gen Virol 2021; 102. [PMID: 34554085 PMCID: PMC10026734 DOI: 10.1099/jgv.0.001661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Current antiviral drugs are limited because of their adverse side effects and increased rate of resistance. In recent decades, much scientific effort has been invested in the discovery of new synthetic and natural compounds with promising antiviral properties. Among this new generation of compounds, antimicrobial peptides with antiviral activity have been described and are attracting attention due to their mechanism of action and biological properties. To understand the potential of antiviral peptides (AVPs), we analyse the antiviral activity of well-known AVP families isolated from different natural sources, discuss their physical-chemical properties, and demonstrate how AVP databases can guide us to design synthetic AVPs with better therapeutic properties. All considerations in this sphere of antiviral therapy clearly demonstrate the remarkable contribution that AVPs may make in conquering old as well as newly emerging viruses that plague humanity.
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Affiliation(s)
- Hovakim Zakaryan
- Laboratory of Antiviral Drug Discovery, Institute of Molecular Biology of NAS, 0014, Yerevan, Armenia
- Denovo Sciences CJSC, 0033, Yerevan, Armenia
| | - Garri Chilingaryan
- Laboratory of Antiviral Drug Discovery, Institute of Molecular Biology of NAS, 0014, Yerevan, Armenia
| | - Erik Arabyan
- Laboratory of Antiviral Drug Discovery, Institute of Molecular Biology of NAS, 0014, Yerevan, Armenia
| | | | - Guangshun Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5900, USA
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33
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Samrot AV, Abubakar Mohamed A, Faradjeva E, Si Jie L, Hooi Sze C, Arif A, Chuan Sean T, Norbert Michael E, Yeok Mun C, Xiao Qi N, Ling Mok P, Kumar SS. Mechanisms and Impact of Biofilms and Targeting of Biofilms Using Bioactive Compounds-A Review. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:839. [PMID: 34441045 PMCID: PMC8401077 DOI: 10.3390/medicina57080839] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 08/10/2021] [Indexed: 12/31/2022]
Abstract
Biofilms comprising aggregates of microorganisms or multicellular communities have been a major issue as they cause resistance against antimicrobial agents and biofouling. To date, numerous biofilm-forming microorganisms have been identified, which have been shown to result in major effects including biofouling and biofilm-related infections. Quorum sensing (which describes the cell communication within biofilms) plays a vital role in the regulation of biofilm formation and its virulence. As such, elucidating the various mechanisms responsible for biofilm resistance (including quorum sensing) will assist in developing strategies to inhibit and control the formation of biofilms in nature. Employing biological control measures (such as the use of bioactive compounds) in targeting biofilms is of great interest since they naturally possess antimicrobial activity among other favorable attributes and can also possibly act as potent antibiofilm agents. As an effort to re-establish the current notion and understanding of biofilms, the present review discuss the stages involved in biofilm formation, the factors contributing to its development, the effects of biofilms in various industries, and the use of various bioactive compounds and their strategies in biofilm inhibition.
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Affiliation(s)
- Antony V. Samrot
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Amira Abubakar Mohamed
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Etel Faradjeva
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Lee Si Jie
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Chin Hooi Sze
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Akasha Arif
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Tan Chuan Sean
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Emmanuel Norbert Michael
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Chua Yeok Mun
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Ng Xiao Qi
- School of Bioscience, Faculty of Medicine, Bioscience and Nursing, MAHSA University, Jenjarom 42610, Selangor, Malaysia; (A.A.M.); (E.F.); (L.S.J.); (C.H.S.); (A.A.); (T.C.S.); (E.N.M.); (C.Y.M.); (N.X.Q.)
| | - Pooi Ling Mok
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
| | - Suresh S. Kumar
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (UPM), Serdang 43400, Selangor, Malaysia
- Department of Biotechnology, Bharath Institute of Higher Education and Research, Agharam Road Selaiyur, Chennai 600 073, Tamil Nadu, India
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Wang C, Hong T, Cui P, Wang J, Xia J. Antimicrobial peptides towards clinical application: Delivery and formulation. Adv Drug Deliv Rev 2021; 175:113818. [PMID: 34090965 DOI: 10.1016/j.addr.2021.05.028] [Citation(s) in RCA: 85] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/14/2021] [Accepted: 05/30/2021] [Indexed: 02/07/2023]
Abstract
Antimicrobial peptides hold promise to supplement small molecules antibiotics and combat the multidrug resistant microbes. There are however technical hurdles towards the clinical applications, largely due to the inherent limitations of peptides including stability, cytotoxicity and bioavailability. Here we review recent studies concerning the delivery and formulation of antimicrobial peptides, by categorizing the different strategies as driven by physical interactions or chemical conjugation reactions, and carriers ranging from inorganic based ones (including gold, silver and silica based solid nanoparticles) to organic ones (including micelle, liposome and hydrogel) are covered. Besides, targeted delivery of antimicrobial peptides or using antimicrobial peptides as the targeting moiety, and responsive release of the peptides after delivery are also reviewed. Lastly, strategies towards the increase of oral bioavailability, from both physical or chemical methods, are highlighted. Altogether, this article provides a comprehensive review of the recent progress of the delivery and formulation of antimicrobial peptides towards clinical application.
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Affiliation(s)
- Cheng Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Tingting Hong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Pengfei Cui
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China
| | - Jianhao Wang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Pharmacy, Changzhou University, Changzhou, Jiangsu 213164, China.
| | - Jiang Xia
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong Special Administrative Region.
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Kalmankar NV, Balaram P, Venkatesan R. Mass Spectrometric Analysis of Cyclotides from Clitoria ternatea: Xxx-Pro Bond Fragmentation as Convenient Diagnostic of Pro Residue Positioning. Chem Asian J 2021; 16:2920-2931. [PMID: 34288513 DOI: 10.1002/asia.202100585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/14/2021] [Indexed: 11/06/2022]
Abstract
Cyclotides, a class of macrocyclic plant peptides, characterized by a cyclic backbone and three inter-locking disulfide bonds, may be divided into two major structural subfamilies, Möbius and Bracelet, based on the presence or absence of a specific proline residue. The present study describes the suite of cyclotides obtained from Clitoria ternatea, characterized by LC-MS and MS/MS techniques. Notable variations in product ion distributions were observed in cyclotides belonging to different structural subfamilies based on the number and positions of proline residues. For instance, Cter M which is an abundant Möbius cyclotide in this plant containing three proline residues, displayed distinct b- and y- ion characteristics in the MS/MS spectra compared to Cliotide T1, another commonly identified cyclotide but belonging to the Bracelet subfamily having two proline residues. The distinct fragmentation pattern of prototypical cyclotides of each structural subfamily, determined by Xxx-Pro bond fragmentation, was used to rapidly identify and sequence a novel cyclotide ctr pep 30 from this plant.
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Affiliation(s)
- Neha V Kalmankar
- National Centre for Biological Sciences (NCBS), Tata Institute for Fundamental Research (TIFR), GKVK Campus, Bangalore, Karnataka, 560065, India.,The University of Trans-Disciplinary Health Sciences and Technology (TDU), 74/2, Jarakabande Kaval, Post Attur, Via Yelahanka, Bangalore, Karnataka, 560064, India
| | - Padmanabhan Balaram
- National Centre for Biological Sciences (NCBS), Tata Institute for Fundamental Research (TIFR), GKVK Campus, Bangalore, Karnataka, 560065, India.,Molecular Biophysics Unit, Indian Institute of Science, Bangalore, Karnataka, 560012, India
| | - Radhika Venkatesan
- National Centre for Biological Sciences (NCBS), Tata Institute for Fundamental Research (TIFR), GKVK Campus, Bangalore, Karnataka, 560065, India.,Department of Biological Sciences, Indian Institute of Science, Education and Research (IISER) Kolkata, Mohanpur, West Bengal, 741246, India
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36
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Dang X, Wang G. Spotlight on the Selected New Antimicrobial Innate Immune Peptides Discovered During 2015-2019. Curr Top Med Chem 2021; 20:2984-2998. [PMID: 33092508 DOI: 10.2174/1568026620666201022143625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/25/2020] [Accepted: 02/27/2020] [Indexed: 12/16/2022]
Abstract
BACKGROUND Antibiotic resistance is a global issue and new anti-microbials are required. INTRODUCTION Anti-microbial peptides are important players of host innate immune systems that prevent infections. Due to their ability to eliminate drug-resistant pathogens, AMPs are promising candidates for developing the next generation of anti-microbials. METHODS The anti-microbial peptide database provides a useful tool for searching, predicting, and designing new AMPs. In the period from 2015-2019, ~500 new natural peptides have been registered. RESULTS This article highlights a selected set of new AMP members with interesting properties. Teixobactin is a cell wall inhibiting peptide antibiotic, while darobactin inhibits a chaperone and translocator for outer membrane proteins. Remarkably, cOB1, a sex pheromone from commensal enterococci, restricts the growth of multidrug-resistant Enterococcus faecalis in the gut at a picomolar concentration. A novel proline-rich AMP has been found in the plant Brassica napus. A shrimp peptide MjPen- II comprises three different sequence domains: serine-rich, proline-rich, and cysteine-rich regions. Surprisingly, an amphibian peptide urumin specifically inhibits H1 hemagglutinin-bearing influenza A virus. Defensins are abundant and typically consist of three pairs of intramolecular disulfide bonds. However, rat rattusin dimerizes via forming five pairs of intermolecular disulfide bonds. While human LL-37 can be induced by vitamin D, vitamin A induces the expression of resistin-like molecule alpha (RELMα) in mice. The isolation and characterization of an alternative human cathelicidin peptide, TLN-58, substantiates the concept of one gene multiple peptides. The involvement of a fly AMP nemuri in sleep induction may promote the research on the relationship between sleep and infection control. CONCLUSION The functional roles of AMPs continue to grow and the general term "innate immune peptides" becomes useful. These discoveries widen our view on the anti-microbial peptides and may open new opportunities for developing novel peptide therapeutics for different applications.
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Affiliation(s)
- Xiangli Dang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5900, United States
| | - Guangshun Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, 985900 Nebraska Medical Center, Omaha, NE 68198-5900, United States
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37
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Rajendran S, Slazak B, Mohotti S, Strömstedt AA, Göransson U, Hettiarachchi CM, Gunasekera S. Tropical vibes from Sri Lanka - cyclotides from Viola betonicifolia by transcriptome and mass spectrometry analysis. PHYTOCHEMISTRY 2021; 187:112749. [PMID: 33932786 DOI: 10.1016/j.phytochem.2021.112749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Revised: 03/19/2021] [Accepted: 03/20/2021] [Indexed: 06/12/2023]
Abstract
Cyclotides are an extremely stable class of peptides, ubiquitously distributed in Violaceae. The aim of the present study was to investigate the presence of cyclotides in Sri Lankan Violaceae plants, using combined tools of transcriptomics and mass spectrometry. New cyclotides were discovered for the first time in the wild flora of Sri Lanka, within Viola betonicifolia, a plant used in traditional medicine as an antimicrobial. Plant extracts prepared in small scale from Viola betonicifolia were first subjected to LC-MS analysis. Subsequent transcriptome de novo sequencing of Viola betonicifolia uncovered 25 new (vibe 1-25) and three known (varv A/kalata S, viba 17, viba 11) peptide sequences from Möbius and bracelet cyclotide subfamilies as well as hybrid cyclotides. Among the transcripts, putative linear acyclotide sequences (vibe 4, vibe 10, vibe 11 and vibe 22) that lack a conserved asparagine or aspartic acid vital for cyclisation were also present. Four asparagine endopeptidases (AEPs), VbAEP1-4 were found within the Viola betonicifolia transcriptome, including a peptide asparaginyl ligase (PAL), potentially involved in cyclotide backbone cyclisation, showing >93% sequence homology to Viola yedoensis peptide asparaginyl ligases, VyPALs. In addition, we identified two protein disulfide isomerases (PDIs), VbPDI1-2, likely involved in cyclotide oxidative folding, having high sequence homology (>74%) with previously reported Rubiaceae and Violaceae PDIs. The current study highlights the ubiquity of cyclotides in Violaceae as well as the utility of transcriptomic analysis for cyclotides and their putative processing enzyme discovery. The high variability of cyclotide sequences in terms of loop sizes and residues in V. betonicifolia showcase the cyclotide structure as an adaptable scaffold as well as their importance as a combinatorial library, implicated in plant defense.
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Affiliation(s)
- Sanjeevan Rajendran
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, 751 23, Uppsala, Sweden; Department of Chemistry, Faculty of Science, University of Colombo, Thurston Rd, Colombo 03, Sri Lanka
| | - Blazej Slazak
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, 751 23, Uppsala, Sweden; W. Szafer Institute of Botany, Polish Academy of Science, 46 Lubicz St., 31-512, Cracow, Poland
| | - Supun Mohotti
- Department of Chemistry, Faculty of Science, University of Colombo, Thurston Rd, Colombo 03, Sri Lanka
| | - Adam A Strömstedt
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, 751 23, Uppsala, Sweden
| | - Ulf Göransson
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, 751 23, Uppsala, Sweden
| | - Chamari M Hettiarachchi
- Department of Chemistry, Faculty of Science, University of Colombo, Thurston Rd, Colombo 03, Sri Lanka
| | - Sunithi Gunasekera
- Pharmacognosy, Department of Pharmaceutical Biosciences, Uppsala University, 751 23, Uppsala, Sweden.
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38
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Cyclotide host-defense tailored for species and environments in violets from the Canary Islands. Sci Rep 2021; 11:12452. [PMID: 34127703 PMCID: PMC8203695 DOI: 10.1038/s41598-021-91555-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 05/19/2021] [Indexed: 11/08/2022] Open
Abstract
Cyclotides are cyclic peptides produced by plants. Due to their insecticidal properties, they are thought to be involved in host defense. Violets produce complex mixtures of cyclotides, that are characteristic for each species and variable in different environments. Herein, we utilized mass spectrometry (LC–MS, MALDI-MS), transcriptomics and biological assays to investigate the diversity, differences in cyclotide expression based on species and different environment, and antimicrobial activity of cyclotides found in violets from the Canary Islands. A wide range of different habitats can be found on these islands, from subtropical forests to dry volcano peaks at high altitudes. The islands are inhabited by the endemic Viola palmensis, V. cheiranthifolia, V. anagae and the common V. odorata. The number of cyclotides produced by a given species varied in plants from different environments. The highest diversity was noted in V. anagae which resides in subtropical forest and the lowest in V. cheiranthifolia from the Teide volcano. Transcriptome sequencing and LC–MS were used to identify 23 cyclotide sequences from V. anagae. Cyclotide extracts exhibited antifungal activities with the lowest minimal inhibitory concentrations noted for V. anagae (15.62 μg/ml against Fusarium culmorum). The analysis of the relative abundance of 30 selected cyclotides revealed patterns characteristic to both species and populations, which can be the result of genetic variability or environmental conditions in different habitats. The current study exemplifies how plants tailor their host defense peptides for various habitats, and the usefulness of cyclotides as markers for chemosystematics.
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Comparison of a Short Linear Antimicrobial Peptide with Its Disulfide-Cyclized and Cyclotide-Grafted Variants against Clinically Relevant Pathogens. Microorganisms 2021; 9:microorganisms9061249. [PMID: 34201398 PMCID: PMC8228819 DOI: 10.3390/microorganisms9061249] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 06/04/2021] [Indexed: 12/14/2022] Open
Abstract
According to the World Health Organization (WHO) the development of resistance against antibiotics by microbes is one of the most pressing health concerns. The situation will intensify since only a few pharmacological companies are currently developing novel antimicrobial compounds. Discovery and development of novel antimicrobial compounds with new modes of action are urgently needed. Antimicrobial peptides (AMPs) are known to be able to kill multidrug-resistant bacteria and, therefore, of interest to be developed into antimicrobial drugs. Proteolytic stability and toxicities of these peptides are challenges to overcome, and one strategy frequently used to address stability is cyclization. Here we introduced a disulfide-bond to cyclize a potent and nontoxic 9mer peptide and, in addition, as a proof-of-concept study, grafted this peptide into loop 6 of the cyclotide MCoTI-II. This is the first time an antimicrobial peptide has been successfully grafted onto the cyclotide scaffold. The disulfide-cyclized and grafted cyclotide showed moderate activity in broth and strong activity in 1/5 broth against clinically relevant resistant pathogens. The linear peptide showed superior activity in both conditions. The half-life time in 100% human serum was determined, for the linear peptide, to be 13 min, for the simple disulfide-cyclized peptide, 9 min, and, for the grafted cyclotide 7 h 15 min. The addition of 10% human serum led to a loss of antimicrobial activity for the different organisms, ranging from 1 to >8-fold for the cyclotide. For the disulfide-cyclized version and the linear version, activity also dropped to different degrees, 2 to 18-fold, and 1 to 30-fold respectively. Despite the massive difference in stability, the linear peptide still showed superior antimicrobial activity. The cyclotide and the disulfide-cyclized version demonstrated a slower bactericidal effect than the linear version. All three peptides were stable at high and low pH, and had very low hemolytic and cytotoxic activity.
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40
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Aslam L, Kaur R, Sharma V, Kapoor N, Mahajan R. Isolation and characterization of cyclotides from the leaves of Viola odorata L. using peptidomic and bioinformatic approach. 3 Biotech 2021; 11:211. [PMID: 33927999 DOI: 10.1007/s13205-021-02763-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 03/29/2021] [Indexed: 11/28/2022] Open
Abstract
Cyclotides are true gene products characterized by the presence of six conserved cysteine residues and knotted arrangement of three disulfide bonds. These macrocyclic peptides show exceptional resistance to thermal, chemical and enzymatic degradation which is defined due to their three-dimensional folding. The current study describes an efficient strategy involving reduction, enzymatic digestion and mass spectroscopy sequencing for the identification of the precursor sequences and the cyclotide domains present in the leaf tissue of Viola odorata. We observed 122 partial peptide sequences containing 31 cyclotide domains along with 19 unique sequences consisting of putative novel cyclotides and acyclotides. Four precursor sequences consisting of putative new and already reported domains were further characterized for cyclotide domains, their structure and subfamilies. The sequences revealed the presence of classic knotted cyclotide folds with similar six characteristic loops but different amino acid residues. Molecular modeling indicated that the secondary structures present in the cyclotides are mainly α-helix and random coils. Variation in the sequences and conservation in cysteine residues in the cyclotides was revealed by protein diversity wheel. The significant information observed in the current study expands our knowledge about the structure and type of cyclic peptides in V. odorata leaves. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-02763-2.
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Affiliation(s)
- Lubna Aslam
- School of Biotechnology, University of Jammu, Jammu and Kashmir, India
| | - Ramanjeet Kaur
- School of Biotechnology, University of Jammu, Jammu and Kashmir, India
| | - Venu Sharma
- School of Biotechnology, University of Jammu, Jammu and Kashmir, India
| | - Nisha Kapoor
- School of Biotechnology, University of Jammu, Jammu and Kashmir, India
| | - Ritu Mahajan
- School of Biotechnology, University of Jammu, Jammu and Kashmir, India
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41
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Lei X, Liu S, Zhou R, Meng XY. Molecular Dynamics Simulation Study on Interactions of Cycloviolacin with Different Phospholipids. J Phys Chem B 2021; 125:3476-3485. [PMID: 33787269 DOI: 10.1021/acs.jpcb.0c10513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cyclotides are disulfide-rich cyclic peptides isolated from plants, which are extremely stable against thermal and proteolytic degradation, with a variety of biological activities including antibacterial, hemolytic, anti-HIV, and anti-tumor. Most of these bioactivities are related to their preference for binding to certain types of phospholipids and subsequently disrupt lipid membranes. In the present study, we use a cyclotide, cycloviolacin O2 (cyO2), as a model system to investigate its interactions with three lipid bilayers 1-palmitoyl-2-oleoylphosphatidylethanolamine (POPE), 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol (POPG)-doped POPE, and 1-palmitoyl-2-oleoylphosphatidylcholine (POPC), to help understand its potential mechanism of action toward the membranes at the molecular level using molecular dynamics simulations. In our simulations, cyO2 repeatedly forms stable binding complexes with the POPE-containing bilayers, while within the same simulation time scale, it "jumps" back and forth on the surface of the POPC bilayer without a strong binding. Detailed analyses reveal that the electrostatic attraction is the main driving force for the initial bindings between cyO2 and the lipids, but with strikingly different strengths in different bilayers. For the POPE-containing bilayers, the charged residues of cyO2 attract both POPE amino and phosphate head groups favorably; meanwhile, its hydrophobic residues are deeply inserted into the lipid hydrophobic tails (core) of the membrane, thus forming stable binding complexes. In contrast, POPC lipids with three methyl groups on the amino head group create a steric hindrance when interacting with cyO2, thus resulting in a relatively difficult binding of cyO2 on POPC compared to POPE. Our current findings provide additional insights for a better understanding of how cyO2 binds to the POPE-containing membrane, which should shed light on the future cyclotide-based antibacterial agent design.
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Affiliation(s)
- Xiaotong Lei
- Institute of Quantitative Biology and Medicine, State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Shengtang Liu
- Institute of Quantitative Biology and Medicine, State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
| | - Ruhong Zhou
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Xuan-Yu Meng
- Institute of Quantitative Biology and Medicine, State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Soochow University, Suzhou 215123, China
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42
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Struyfs C, Cammue BPA, Thevissen K. Membrane-Interacting Antifungal Peptides. Front Cell Dev Biol 2021; 9:649875. [PMID: 33912564 PMCID: PMC8074791 DOI: 10.3389/fcell.2021.649875] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/09/2021] [Indexed: 12/17/2022] Open
Abstract
The incidence of invasive fungal infections is increasing worldwide, resulting in more than 1.6 million deaths every year. Due to growing antifungal drug resistance and the limited number of currently used antimycotics, there is a clear need for novel antifungal strategies. In this context, great potential is attributed to antimicrobial peptides (AMPs) that are part of the innate immune system of organisms. These peptides are known for their broad-spectrum activity that can be directed toward bacteria, fungi, viruses, and/or even cancer cells. Some AMPs act via rapid physical disruption of microbial cell membranes at high concentrations causing cell leakage and cell death. However, more complex mechanisms are also observed, such as interaction with specific lipids, production of reactive oxygen species, programmed cell death, and autophagy. This review summarizes the structure and mode of action of antifungal AMPs, thereby focusing on their interaction with fungal membranes.
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Affiliation(s)
- Caroline Struyfs
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
| | - Bruno P A Cammue
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
| | - Karin Thevissen
- Centre of Microbial and Plant Genetics, KU Leuven, Leuven, Belgium
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Parthasarathy A, Borrego EJ, Savka MA, Dobson RCJ, Hudson AO. Amino acid-derived defense metabolites from plants: A potential source to facilitate novel antimicrobial development. J Biol Chem 2021; 296:100438. [PMID: 33610552 PMCID: PMC8024917 DOI: 10.1016/j.jbc.2021.100438] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 12/23/2022] Open
Abstract
For millennia, humanity has relied on plants for its medicines, and modern pharmacology continues to reexamine and mine plant metabolites for novel compounds and to guide improvements in biological activity, bioavailability, and chemical stability. The critical problem of antibiotic resistance and increasing exposure to viral and parasitic diseases has spurred renewed interest into drug treatments for infectious diseases. In this context, an urgent revival of natural product discovery is globally underway with special attention directed toward the numerous and chemically diverse plant defensive compounds such as phytoalexins and phytoanticipins that combat herbivores, microbial pathogens, or competing plants. Moreover, advancements in “omics,” chemistry, and heterologous expression systems have facilitated the purification and characterization of plant metabolites and the identification of possible therapeutic targets. In this review, we describe several important amino acid–derived classes of plant defensive compounds, including antimicrobial peptides (e.g., defensins, thionins, and knottins), alkaloids, nonproteogenic amino acids, and phenylpropanoids as potential drug leads, examining their mechanisms of action, therapeutic targets, and structure–function relationships. Given their potent antibacterial, antifungal, antiparasitic, and antiviral properties, which can be superior to existing drugs, phytoalexins and phytoanticipins are an excellent resource to facilitate the rational design and development of antimicrobial drugs.
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Affiliation(s)
- Anutthaman Parthasarathy
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Eli J Borrego
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Michael A Savka
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA
| | - Renwick C J Dobson
- Biomolecular Interaction Centre and School of Biological Sciences, University of Canterbury, Christchurch, New Zealand; Bio21 Molecular Science and Biotechnology Institute, Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, Victoria, Australia
| | - André O Hudson
- Rochester Institute of Technology, Thomas H. Gosnell School of Life Sciences, Rochester, New York, USA.
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44
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Identification and characterization of a wolfberry carboxypeptidase inhibitor from Lycium barbarum. Food Chem 2021; 351:129338. [PMID: 33647700 DOI: 10.1016/j.foodchem.2021.129338] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 01/22/2021] [Accepted: 02/06/2021] [Indexed: 01/13/2023]
Abstract
Hyperstable cysteine-rich peptides (CRPs) represent an underexplored superfamily of bioactives in functional foods. An example is wolfberry of the Lycium barbarum family. Previously, we discovered a CRP, designated α-lybatide, from L. barbarum bark. Herein, we report the discovery of β-lybatide, a novel carboxypeptidase inhibitor belonging to a different CRP family from the wolfberry plant. Proteomic and transcriptomic analyses showed that β-lybatide contains 36 amino acids with six cysteine residues. NMR spectroscopy revealed that β-lybatide displays a knottin-like structure that renders it highly resistant to thermal, chemical and enzymatic degradation, conditions important for keeping its structural integrity in gastrointestinal tract. Biochemical assays showed that β-lybatide is a potent carboxypeptidase inhibitor which could contribute to the wolfberry biological activities. Bioinformatics analysis revealed an additional 49 β-lybatide-like plant carboxypeptidase inhibitors. Together, our results show that β-lybatide is the first and the smallest plant-derived hyperstable carboxypeptidase inhibitor discovered from a functional food.
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45
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Zhang J, Yuan J, Li Z, Fu C, Xu M, Yang J, Jiang X, Zhou B, Ye X, Xu C. Exploring and exploiting plant cyclic peptides for drug discovery and development. Med Res Rev 2021; 41:3096-3117. [PMID: 33599316 DOI: 10.1002/med.21792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 01/10/2021] [Accepted: 01/31/2021] [Indexed: 01/07/2023]
Abstract
Ever since the discovery of insulin, natural peptides have become an important resource for therapeutic development. Decades of research has led to the discovery of a long list of peptide drugs with broad applications in clinics, from antibiotics to hypertension treatment to pain management. Many of these US FDA-approved peptide drugs are derived from microorganisms and animals. By contrast, the great potential of plant cyclic peptides as therapeutics remains largely unexplored. These macrocyclic peptides typically have rigid structures, good bioavailability and membrane permeability, making them appealing candidates for drug development and engineering. In this review, we introduce the three major classes of plant cyclic peptides and summarize their potential medical applications. We discuss how we can leverage the genome information of many different plants to quickly search for new cyclic peptides and how we can take advantage of the insights gained from their biosynthetic pathways to transform the process of production and drug development. These recent developments have provided a new angle for exploring and exploiting plant cyclic peptides, and we believe that many more peptide drugs derived from plants are about to come.
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Affiliation(s)
- Jingjing Zhang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China.,Integrated Chinese and Western Medicine Postdoctoral Research Station, Jinan University, Guangzhou, Guangdong, China
| | - Jimin Yuan
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Zhijie Li
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Chunjin Fu
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Menglong Xu
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, USA
| | - Jing Yang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Xin Jiang
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Boping Zhou
- Department of Infectious Diseases, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Xiufeng Ye
- Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China
| | - Chengchao Xu
- Department of Geriatric Medicine, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University; The First Affiliated Hospital, Southern University of Science and Technology), Shenzhen, Guangdong, China.,Whitehead Institute for Biomedical Research, Cambridge, Massachusetts, USA
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46
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Pinto MEF, Chan LY, Koehbach J, Devi S, Gründemann C, Gruber CW, Gomes M, Bolzani VS, Cilli EM, Craik DJ. Cyclotides from Brazilian Palicourea sessilis and Their Effects on Human Lymphocytes. JOURNAL OF NATURAL PRODUCTS 2021; 84:81-90. [PMID: 33397096 PMCID: PMC7836058 DOI: 10.1021/acs.jnatprod.0c01069] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Indexed: 05/05/2023]
Abstract
Cyclotides are plant-derived peptides found within five families of flowering plants (Violaceae, Rubiaceae, Fabaceae, Solanaceae, and Poaceae) that have a cyclic backbone and six conserved cysteine residues linked by disulfide bonds. Their presence within the Violaceae species seems ubiquitous, yet not all members of other families produce these macrocyclic peptides. The genus Palicourea Aubl. (Rubiaceae) contains hundreds of neotropical species of shrubs and small trees; however, only a few cyclotides have been discovered hitherto. Herein, five previously uncharacterized Möbius cyclotides within Palicourea sessilis and their pharmacological activities are described. Cyclotides were isolated from leaves and stems of this plant and identified as pase A-E, as well as the known peptide kalata S. Cyclotides were de novo sequenced by MALDI-TOF/TOF mass spectrometry, and their structures were solved by NMR spectroscopy. Because some cyclotides have been reported to modulate immune cells, pase A-D were assayed for cell proliferation of human primary activated T lymphocytes, and the results showed a dose-dependent antiproliferative function. The toxicity on other nonimmune cells was also assessed. This study reveals that pase cyclotides have potential for applications as immunosuppressants and in immune-related disorders.
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Affiliation(s)
- Meri Emili F. Pinto
- Institute
of Chemistry, São Paulo State University−UNESP, Araraquara, 14800-060 SP, Brazil
- Institute
for Molecular Bioscience, Australian Research Council Centre of Excellence
for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Lai Yue Chan
- Institute
for Molecular Bioscience, Australian Research Council Centre of Excellence
for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Johannes Koehbach
- Institute
for Molecular Bioscience, Australian Research Council Centre of Excellence
for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, 4072 Queensland, Australia
| | - Seema Devi
- Institute
for Infection Prevention and Hospital Epidemiology, Center for Complementary
Medicine, University of Freiburg, 79111 Freiburg, Germany
| | - Carsten Gründemann
- Translational
Complementary Medicine, Department of Pharmaceutical Sciences, University of Basel, 4056 Basel, Switzerland
| | - Christian W. Gruber
- Center
for Physiology and Pharmacology, Medical
University of Vienna, 1090 Vienna, Austria
| | - Mario Gomes
- Rio
de Janeiro
Botanic Garden Research Institute−JBRJ, Rio de Janeiro, 22470-180 RJ, Brazil
| | - Vanderlan S. Bolzani
- Institute
of Chemistry, São Paulo State University−UNESP, Araraquara, 14800-060 SP, Brazil
| | - Eduardo Maffud Cilli
- Institute
of Chemistry, São Paulo State University−UNESP, Araraquara, 14800-060 SP, Brazil
| | - David J. Craik
- Institute
for Molecular Bioscience, Australian Research Council Centre of Excellence
for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, 4072 Queensland, Australia
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47
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Wani SS, Dar PA, Zargar SM, Dar TA. Therapeutic Potential of Medicinal Plant Proteins: Present Status and Future Perspectives. Curr Protein Pept Sci 2021; 21:443-487. [PMID: 31746291 DOI: 10.2174/1389203720666191119095624] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 10/10/2019] [Accepted: 10/27/2019] [Indexed: 02/07/2023]
Abstract
Biologically active molecules obtained from plant sources, mostly including secondary metabolites, have been considered to be of immense value with respect to the treatment of various human diseases. However, some inevitable limitations associated with these secondary metabolites like high cytotoxicity, low bioavailability, poor absorption, low abundance, improper metabolism, etc., have forced the scientific community to explore medicinal plants for alternate biologically active molecules. In this context, therapeutically active proteins/peptides from medicinal plants have been promoted as a promising therapeutic intervention for various human diseases. A large number of proteins isolated from the medicinal plants have been shown to exhibit anti-microbial, anti-oxidant, anti-HIV, anticancerous, ribosome-inactivating and neuro-modulatory activities. Moreover, with advanced technological developments in the medicinal plant research, medicinal plant proteins such as Bowman-Birk protease inhibitor and Mistletoe Lectin-I are presently under clinical trials against prostate cancer, oral carcinomas and malignant melanoma. Despite these developments and proteins being potential drug candidates, to date, not a single systematic review article has documented the therapeutical potential of the available biologically active medicinal plant proteome. The present article was therefore designed to describe the current status of the therapeutically active medicinal plant proteins/peptides vis-à-vis their potential as future protein-based drugs for various human diseases. Future insights in this direction have also been highlighted.
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Affiliation(s)
- Snober Shabeer Wani
- Department of Clinical Biochemistry, University of Kashmir, Srinagar-190006, Jammu and Kashmir, India
| | - Parvaiz A Dar
- Department of Clinical Biochemistry, University of Kashmir, Srinagar-190006, Jammu and Kashmir, India
| | - Sajad M Zargar
- Division of Plant Biotechnology, S. K. University of Agricultural Sciences and Technology of Srinagar, Shalimar-190025, Srinagar, Jammu and Kashmir, India
| | - Tanveer A Dar
- Department of Clinical Biochemistry, University of Kashmir, Srinagar-190006, Jammu and Kashmir, India
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48
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Grover T, Mishra R, Gulati P, Mohanty A. An insight into biological activities of native cyclotides for potential applications in agriculture and pharmaceutics. Peptides 2021; 135:170430. [PMID: 33096195 DOI: 10.1016/j.peptides.2020.170430] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 10/06/2020] [Accepted: 10/12/2020] [Indexed: 02/08/2023]
Abstract
Cyclotides are plant-derived mini-proteins of 28 - 37 amino acids. They have a characteristic head-to-tail cyclic backbone and three disulfide cross-linkages formed by six highly conserved cysteine residues, creating a unique knotted ring structure, known as a cyclic cystine knot (CCK) motif. The CCK topology confers immense stability to cyclotides with resistance to thermal and enzymatic degradation. Native cyclotides are of interest due to their multiple biological activities with several potential applications in agricultural (e.g. biopesticides, antifungal) and pharmaceutical (e.g. anti-HIV, cytotoxic to tumor cells) sectors. The most recent application of insecticidal activity of cyclotides is the commercially available biopesticidal spray known as 'Sero X' for cotton crops. Cyclotides have a general mode of action and their potency of bioactivity is determined through their binding ability, pore formation and disruption of the target biological membranes. Keeping in view the important potential applications of biological activities of cyclotides and the lack of an extensive and analytical compilation of bioactive cyclotides, the present review systematically describes eight major biological activities of the native cyclotides from four angiosperm families viz. Fabaceae, Poaceae, Rubiaceae, Violaceae. The bioactivities of 94 cytotoxic, 57 antibacterial, 44 hemolytic, 25 antifungal, 21 anti-HIV, 20 nematocidal, 10 insecticidal and 5 molluscicidal cyclotides have been comprehensively elaborated. Further, their distribution in angiosperm families, mode of action and future prospects have also been discussed.
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Affiliation(s)
- Tripti Grover
- Bioinformatics Infrastructure Facility, Gargi College, University of Delhi, India
| | - Reema Mishra
- Department of Botany, Gargi College, University of Delhi, India
| | - Pooja Gulati
- Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Aparajita Mohanty
- Bioinformatics Infrastructure Facility, Gargi College, University of Delhi, India.
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49
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Rowe SM, Spring DR. The role of chemical synthesis in developing RiPP antibiotics. Chem Soc Rev 2021; 50:4245-4258. [DOI: 10.1039/d0cs01386b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This tutorial review discusses the potential of ribosomally synthesised and post-translationally modified peptides (RiPPs) as antimicrobials and looks at the chemical synthesis of three classes of RiPP: lasso peptides, cyclotides, and lanthipeptides.
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Affiliation(s)
- Sam M. Rowe
- Department of Chemistry
- University of Cambridge
- Cambridge
- UK
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50
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González-Castro R, Gómez-Lim MA, Plisson F. Cysteine-Rich Peptides: Hyperstable Scaffolds for Protein Engineering. Chembiochem 2020; 22:961-973. [PMID: 33095969 DOI: 10.1002/cbic.202000634] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 10/21/2020] [Indexed: 12/14/2022]
Abstract
Cysteine-rich peptides (CRPs) are small proteins of less than 100 amino acids in length characterized by the presence of disulfide bridges and common end-to-end macrocyclization. These properties confer hyperstability against high temperatures, salt concentration, serum presence, and protease degradation to CRPs. Moreover, their intercysteine domains (loops) are susceptible to residue hypervariability. CRPs have been successfully applied as stable scaffolds for molecular grafting, a protein engineering process in which cysteine-rich structures provide higher thermodynamic and metabolic stability to an epitope and acquire new biological function(s). This review describes the successes and limitations of seven cysteine-rich scaffolds, their bioactive epitopes, and the resulting grafted peptides.
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Affiliation(s)
- Rafael González-Castro
- Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV) Unidad de Genómica Avanzada, Laboratorio Nacional de Genómica para la Biodiversidad (Langebio), Irapuato, Guanajuato, 36824, México.,Centro de Investigación y de Estudios Avanzados del IPN Unidad Irapuato, Departamento de Ingeniería Genética, Irapuato, Guanajuato, 36824, México
| | - Miguel A Gómez-Lim
- Centro de Investigación y de Estudios Avanzados del IPN Unidad Irapuato, Departamento de Ingeniería Genética, Irapuato, Guanajuato, 36824, México
| | - Fabien Plisson
- CONACYT, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV) Unidad de Genómica Avanzada, Laboratorio Nacional de Genómica para la Biodiversidad (Langebio), Irapuato, Guanajuato, 36824, México
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