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Toigo L, Dos Santos Teodoro EI, Guidi AC, Gancedo NC, Petruco MV, Melo EB, Tonin FS, Fernandez-Llimos F, Chierrito D, de Mello JCP, de Medeiros Araújo DC, Sanches ACC. Flavonoid as possible therapeutic targets against COVID-19: a scoping review of in silico studies. Daru 2023; 31:51-68. [PMID: 37195402 PMCID: PMC10191091 DOI: 10.1007/s40199-023-00461-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 04/25/2023] [Indexed: 05/18/2023] Open
Abstract
OBJECTIVES This scoping review aims to present flavonoid compounds' promising effects and possible mechanisms of action on potential therapeutic targets in the SARS-CoV-2 infection process. METHODS A search of electronic databases such as PubMed and Scopus was carried out to evaluate the performance of substances from the flavonoid class at different stages of SARS-CoV-2 infection. RESULTS The search strategy yielded 382 articles after the exclusion of duplicates. During the screening process, 265 records were deemed as irrelevant. At the end of the full-text appraisal, 37 studies were considered eligible for data extraction and qualitative synthesis. All the studies used virtual molecular docking models to verify the affinity of compounds from the flavonoid class with crucial proteins in the replication cycle of the SARS-CoV-2 virus (Spike protein, PLpro, 3CLpro/ MPro, RdRP, and inhibition of the host's ACE II receptor). The flavonoids with more targets and lowest binding energies were: orientin, quercetin, epigallocatechin, narcissoside, silymarin, neohesperidin, delphinidin-3,5-diglucoside, and delphinidin-3-sambubioside-5-glucoside. CONCLUSION These studies allow us to provide a basis for in vitro and in vivo assays to assist in developing drugs for the treatment and prevention of COVID-19.
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Affiliation(s)
- Larissa Toigo
- Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
| | | | - Ana Carolina Guidi
- Laboratório de Biologia Farmacêutica, Departamento de Farmácia, Universidade Estadual de Maringá, Maringá, Brazil
| | - Naiara Cássia Gancedo
- Laboratório de Biologia Farmacêutica, Departamento de Farmácia, Universidade Estadual de Maringá, Maringá, Brazil
| | - Marcus Vinícius Petruco
- Clínica de Reumatologia-Pneumologia Laboratório do Sono de Maringá e Hospital Bom Samaritano de Maringá, Maringá, Brazil
| | - Eduardo Borges Melo
- Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
| | - Fernanda Stumpf Tonin
- Programa de Pós-graduação em Ciências Farmacêuticas, Universidade Federal do Paraná, Curitiba, Brazil
- H&TRC- Health & Technology Research Center, ESTeSLEscola Superior de Tecnologia da Saúde, Instituto Politécnico de Lisboa, Lisboa, Portugal
| | | | - Danielly Chierrito
- Centro de Ciências Médicas e Farmacêuticas, Universidade Estadual do Oeste do Paraná, Cascavel, Brazil
- Centro Universitário Ingá - UNINGÁ, Maringá, Brazil
| | - João Carlos Palazzo de Mello
- Laboratório de Biologia Farmacêutica, Departamento de Farmácia, Universidade Estadual de Maringá, Maringá, Brazil
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Liao S, Chen Y, Yang Y, Wang G, Wang Q, Liu J, Wu H, Luo Q, Chen Y. Detection of RNA-dependent RNA polymerase of porcine epidemic diarrhea virus. J Immunol Methods 2023; 515:113442. [PMID: 36813129 DOI: 10.1016/j.jim.2023.113442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 02/09/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023]
Abstract
The RNA synthesis of porcine epidemic diarrhea virus (PEDV) is a sophisticated process performed by a multilingual viral replication complex, together with cellular factors. A key enzyme of this replication complex is RNA-dependent RNA polymerase (RdRp). However, there is limited knowledge about PEDV RdRp. In our present study, a polyclonal antibody against RdRp was prepared by using a prokaryotic expression vector pET-28a-RdRp to study the function of PEDV RdRp and provide a tool to investigate PEDV pathogenesis. In addition, the enzyme activity and half-life of PEDV RdRp were investigated. The result showed that the polyclonal antibody against PEDV RdRp was successfully prepared and was able to be used to detect PEDV RdRp by immunofluorescence and western blotting. Additionally, enzyme activity of PEDV RdRp reached nearly 2 pmol/μg/h and the half-life of PEDV RdRp was 5.47 h.
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Affiliation(s)
- Suya Liao
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Yijing Chen
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Yulan Yang
- Xinchang County Bureau of Agriculture and Rural Affairs, Xinchang 312500, PR China
| | - Guanhua Wang
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Qihang Wang
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Jiaxin Liu
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Haowen Wu
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Qiyuan Luo
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China
| | - Yun Chen
- Institute of Traditional South Chinese Veterinary Pharmacology, College of Animal Science and Technology, Hainan University, Haikou 570228, PR China.
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Lanjanian H, Hosseini S, Narimani Z, Meknatkhah S, Riazi GH. A knowledge-based protein-protein interaction inhibition (KPI) pipeline: an insight from drug repositioning for COVID-19 inhibition. J Biomol Struct Dyn 2023; 41:11700-11713. [PMID: 36622367 DOI: 10.1080/07391102.2022.2163425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Accepted: 12/22/2022] [Indexed: 01/10/2023]
Abstract
The inhibition of protein-protein interactions (PPIs) by small molecules is an exciting drug discovery strategy. Here, we aimed to develop a pipeline to identify candidate small molecules to inhibit PPIs. Therefore, KPI, a Knowledge-based Protein-Protein Interaction Inhibition pipeline, was introduced to improve the discovery of PPI inhibitors. Then, phytochemicals from a collection of known Middle Eastern antiviral herbs were screened to identify potential inhibitors of key PPIs involved in COVID-19. Here, the following investigations were sequenced: 1) Finding the binding partner and the interface of the proteins in PPIs, 2) Performing the blind ligand-protein inhibition (LPI) simulations, 3) Performing the local LPI simulations, 4) Simulating the interactions of the proteins and their binding partner in the presence and absence of the ligands, and 5) Performing the molecular dynamics simulations. The pharmacophore groups involved in the LPI were also characterized. Aloin, Genistein, Neoglucobrassicin, and Rutin are our new pipeline candidates for inhibiting PPIs involved in COVID-19. We also propose KPI for drug repositioning studies.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Hossein Lanjanian
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shadi Hosseini
- Department of Medicinal Chemistry, Faculty of Pharmacy, Tehran University of Medical Science, Tehran, Iran
| | - Zahra Narimani
- Department of Computer Science and Information Technology, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Sogol Meknatkhah
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
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4
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Khan MS, Khan IM, Ahmad SU, Rahman I, Khan MZ, Khan MSZ, Abbas Z, Noreen S, Liu Y. Immunoinformatics design of B and T-cell epitope-based SARS-CoV-2 peptide vaccination. Front Immunol 2023; 13:1001430. [PMID: 36685569 PMCID: PMC9846236 DOI: 10.3389/fimmu.2022.1001430] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 11/28/2022] [Indexed: 01/05/2023] Open
Abstract
SARS-COV-2 is a virulent respiratory virus, first identified in China (Wuhan) at the end of 2019. Scientists and researchers are trying to find any possible solution to this deadly viral disease. Different drug source agents have been identified, including western medicine, natural products, and traditional Chinese medicine. They have the potential to counteract COVID-19. This virus immediately affects the liver and causes a decrease in oxygen levels. In this study, multiple vacciome approaches were employed for designing a multi-epitope subunit vaccine for battling against SARS-COV-2. Vaccine designing, immunogenicity, allergenic, and physico-chemical assessment were performed by using the vacciome approach. The vaccine design is likely to be antigenic and produce potent interactions with ACE2 and NSP3 receptors. The developed vaccine has also been given to in-silico cloning models and immune response predictions. A total number of 12 CTL and 12 HTL antigenic epitopes were predicted from three selected covid-19 virulent proteins (spike protein, nucleocapsid protein, and membrane proteins, respectively) based on C-terminal cleavage and MHC binding scores. These predicted epitopes were amalgamated by AYY and GPGPG linkers, and a β-defensins adjuvant was inserted into the N-terminus of this vaccine. This analysis shows that the recommended vaccine can produce immune responses against SARS-COV-2. Designing and developing of the mentioned vaccine will require further experimental validation.
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Affiliation(s)
- Muhammad Shehzad Khan
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
- Department of Physics, College of Science, City University of Hong Kong, Kowloon, Hong Kong SAR, China
| | - Ibrar Muhammad Khan
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
| | - Syed Umair Ahmad
- Department of Bioinformatics Hazara University Mansehra, Mansehra, Pakistan
| | - Ishrat Rahman
- Department of Basic Dental Sciences, College of Dentistry, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Muhammad Zahoor Khan
- Department of Animal Breeding and Genetics, Faculty of Veterinary and Animal Sciences, University of Agriculture, Dera Ismail Khan, Pakistan
- State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Muhammad Shah Zeb Khan
- Department of Biotechnology, University of Science and Technology of Bannu, Bannu, Pakistan
- School of Biomedical Science and Biomedical Engineering, Southeast University, Nanjing, China
| | - Zain Abbas
- Department of Life Sciences, University of Management and Technology, Lahore, Pakistan
| | - Shumaila Noreen
- Department of Zoology, Hazara University, Mansehra, Pakistan
| | - Yong Liu
- Anhui Province Key Laboratory of Embryo Development and Reproduction Regulation, Anhui Province Key Laboratory of Environmental Hormone and Reproduction, School of Biological and Food Engineering, Fuyang Normal University, Fuyang, China
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Hao Y, Wang Y, Wang M, Zhou L, Shi J, Cao J, Wang D. The origins of COVID-19 pandemic: A brief overview. Transbound Emerg Dis 2022; 69:3181-3197. [PMID: 36218169 PMCID: PMC9874793 DOI: 10.1111/tbed.14732] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/26/2022] [Accepted: 10/04/2022] [Indexed: 02/06/2023]
Abstract
The novel coronavirus disease (COVID-19) outbreak that emerged at the end of 2019 has now swept the world for more than 2 years, causing immeasurable damage to the lives and economies of the world. It has drawn so much attention to discovering how the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) originated and entered the human body. The current argument revolves around two contradictory theories: a scenario of laboratory spillover events and human contact with zoonotic diseases. Here, we reviewed the transmission, pathogenesis, possible hosts, as well as the genome and protein structure of SARS-CoV-2, which play key roles in the COVID-19 pandemic. We believe the coronavirus was originally transmitted to human by animals rather than by a laboratory leak. However, there still needs more investigations to determine the source of the pandemic. Understanding how COVID-19 emerged is vital to developing global strategies for mitigating future outbreaks.
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Affiliation(s)
- Ying‐Jian Hao
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - Yu‐Lan Wang
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - Mei‐Yue Wang
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - Lan Zhou
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - Jian‐Yun Shi
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - Ji‐Min Cao
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
| | - De‐Ping Wang
- Key Laboratory of Cellular Physiology, Ministry of Education, Department of PhysiologyShanxi Medical UniversityTaiyuanChina
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Xing N, Wang Z, Wang J, Nascimento M, Jongkaewwattana A, Trimpert J, Osterrieder N, Kunec D. Engineering and Characterization of Avian Coronavirus Mutants Expressing Fluorescent Reporter Proteins from the Replicase Gene. J Virol 2022; 96:e0065322. [PMID: 35862676 DOI: 10.1128/jvi.00653-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Infectious bronchitis virus (IBV) is an avian coronavirus that causes infectious bronchitis, an acute and highly contagious respiratory disease of chickens. IBV evolution under the pressure of comprehensive and widespread vaccination requires surveillance for vaccine resistance, as well as periodic vaccine updates. Reverse genetics systems are very valuable tools in virology, as they facilitate rapid genetic manipulation of viral genomes, thereby advancing basic and applied research. We report here the construction of an infectious clone of IBV strain Beaudette as a bacterial artificial chromosome (BAC). The engineered full-length IBV clone allowed the rescue of an infectious virus that was phenotypically indistinguishable from the parental virus. We used the infectious IBV clone and examined whether an enhanced green fluorescent protein (EGFP) can be produced by the replicase gene ORF1 and autocatalytically released from the replicase polyprotein through cleavage by the main coronavirus protease. We show that IBV tolerates insertion of the EGFP ORF at the 3' end of the replicase gene, between the sequences encoding nsp13 and nsp16 (helicase, RNA exonuclease, RNA endonuclease, and RNA methyltransferase). We further show that EGFP is efficiently cleaved from the replicase polyprotein and can be localized in double-membrane vesicles along with viral RNA polymerase and double-stranded RNA, an intermediate of IBV genome replication. One of the engineered reporter EGFP viruses were genetically stable during passage in cultured cells. We demonstrate that the reporter EGFP viruses can be used to study virus replication in host cells and for antiviral drug discovery and development of diagnostic assays. IMPORTANCE Reverse genetics systems based on bacterial artificial chromosomes (BACs) are the most valuable systems in coronavirus research. Here, we describe the establishment of a reverse genetics system for the avian coronavirus strain Beaudette, the most intensively studied strain. We cloned a copy of the avian coronavirus genome into a BAC vector and recovered infectious virus in permissive cells. We used the new system to construct reporter viruses that produce enhanced green fluorescent protein (EGFP). The EGFP coding sequence was inserted into 11 known cleavage sites of the major coronavirus protease in the replicase gene ORF1. Avian coronavirus tolerated the insertion of the EGFP coding sequence at three sites. The engineered reporter viruses replicated with parental efficiency in cultured cells and were sufficiently genetically stable. The new system facilitates functional genomics of the avian coronavirus genome but can also be used for the development of novel vaccines and anticoronaviral drugs.
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Ali F, Alom S, Shakya A, Ghosh SK, Singh UP, Bhat HR. Implication of in silico studies in the search for novel inhibitors against SARS-CoV-2. Arch Pharm (Weinheim) 2022; 355:e2100360. [PMID: 35244237 PMCID: PMC9073995 DOI: 10.1002/ardp.202100360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/11/2022] [Accepted: 01/14/2022] [Indexed: 11/12/2022]
Abstract
Corona Virus Disease-19 (COVID-19) is a pandemic disease mainly caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). It had spread from Wuhan, China, in late 2019 and spread over 222 countries and territories all over the world. Earlier, at the very beginning of COVID-19 infection, there were no approved medicines or vaccines for combating this disease, which adversely affected a lot of individuals worldwide. Although frequent mutation leads to the generation of more deadly variants of SARS-CoV-2, researchers have developed several highly effective vaccines that were approved for emergency use by the World Health Organization (WHO), such as mRNA-1273 by Moderna, BNT162b2 by Pfizer/BioNTech, Ad26.COV2.S by Janssen, AZD1222 by Oxford/AstraZeneca, Covishield by the Serum Institute of India, BBIBP-CorV by Sinopharm, coronaVac by Sinovac, and Covaxin by Bharat Biotech, and the first US Food and Drug Administration-approved antiviral drug Veklury (remdesivir) for the treatment of COVID-19. Several waves of COVID-19 have already occurred worldwide, and good-quality vaccines and medicines should be available for ongoing as well as upcoming waves of the pandemic. Therefore, in silico studies have become an excellent tool for identifying possible ligands that could lead to the development of safer medicines or vaccines. Various phytoconstituents from plants and herbs with antiviral properties are studied further to obtain inhibitors of SARS-CoV-2. In silico screening of various molecular databases like PubChem, ZINC, Asinex Biol-Design Library, and so on has been performed extensively for finding effective ligands against targets. Herein, in silico studies carried out by various researchers are summarized so that one can easily find the best molecule for further in vitro and in vivo studies.
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Affiliation(s)
- Farak Ali
- Girijananda Chowdhury Institute of Pharmaceutical ScienceTezpur, SonitpurAssamIndia
| | - Shahnaz Alom
- Girijananda Chowdhury Institute of Pharmaceutical ScienceTezpur, SonitpurAssamIndia
| | - Anshul Shakya
- Department of Pharmaceutical SciencesDibrugarh UniversityDibrugarhAssamIndia
| | - Surajit K. Ghosh
- Department of Pharmaceutical SciencesDibrugarh UniversityDibrugarhAssamIndia
| | - Udaya P. Singh
- Drug Design & Discovery Laboratory, Department of Pharmaceutical Sciences, Sam Higginbottom University of AgricultureTechnology & SciencesAllahabadUttar PradeshIndia
| | - Hans R. Bhat
- Department of Pharmaceutical SciencesDibrugarh UniversityDibrugarhAssamIndia
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Peng S, Wang Y, Zhang Y, Song X, Zou Y, Li L, Zhao X, Yin Z. Current Knowledge on Infectious Bronchitis Virus Non-structural Proteins: The Bearer for Achieving Immune Evasion Function. Front Vet Sci 2022; 9:820625. [PMID: 35464391 PMCID: PMC9024134 DOI: 10.3389/fvets.2022.820625] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 02/24/2022] [Indexed: 11/13/2022] Open
Abstract
Infectious bronchitis virus (IBV) is the first coronavirus discovered in the world, which is also the prototype of gamma-coronaviruses. Nowadays, IBV is widespread all over the world and has become one of the causative agent causing severe economic losses in poultry industry. Generally, it is believed that the viral replication and immune evasion functions of IBV were modulated by non-structural and accessory proteins, which were also considered as the causes for its pathogenicity. In this study, we summarized the current knowledge about the immune evasion functions of IBV non-structural and accessory proteins. Some non-structural proteins such as nsp2, nsp3, and nsp15 have been shown to antagonize the host innate immune response. Also, nsp7 and nsp16 can block the antigen presentation to inhibit the adapted immune response. In addition, nsp13, nsp14, and nsp16 are participating in the formation of viral mRNA cap to limit the recognition by innate immune system. In conclusion, it is of vital importance to understand the immune evasion functions of IBV non-structural and accessory proteins, which could help us to further explore the pathogenesis of IBV and provide new horizons for the prevention and treatment of IBV in the future.
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Anjum F, Mohammad T, Asrani P, Shafie A, Singh S, Yadav DK, Uversky VN, Hassan MI. Identification of intrinsically disorder regions in non-structural proteins of SARS-CoV-2: New insights into drug and vaccine resistance. Mol Cell Biochem 2022; 477:1607-1619. [PMID: 35211823 PMCID: PMC8869350 DOI: 10.1007/s11010-022-04393-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 02/10/2022] [Indexed: 02/06/2023]
Abstract
The outbreak of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) emerged in December 2019 and caused coronavirus disease 2019 (COVID-19), which causes pneumonia and severe acute respiratory distress syndrome. It is a highly infectious pathogen that promptly spread. Like other beta coronaviruses, SARS‐CoV‐2 encodes some non-structural proteins (NSPs), playing crucial roles in viral transcription and replication. NSPs likely have essential roles in viral pathogenesis by manipulating many cellular processes. We performed a sequence-based analysis of NSPs to get insights into their intrinsic disorders, and their functions in viral replication were annotated and discussed in detail. Here, we provide newer insights into the structurally disordered regions of SARS-CoV-2 NSPs. Our analysis reveals that the SARS-CoV-2 proteome has a chunk of the disordered region that might be responsible for increasing its virulence. In addition, mutations in these regions are presumably responsible for drug and vaccine resistance. These findings suggested that the structurally disordered regions of SARS-CoV-2 NSPs might be invulnerable in COVID-19.
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Affiliation(s)
- Farah Anjum
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Taj Mohammad
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Purva Asrani
- Department of Microbiology, University of Delhi, New Delhi, 110021, India
| | - Alaa Shafie
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Shailza Singh
- National Centre for Cell Science, NCCS Complex, Ganeshkhind, SP, Pune University Campus, Pune, 411007, India
| | - Dharmendra Kumar Yadav
- College of Pharmacy, Gachon University of Medicine and Science, Hambakmoeiro, Yeonsu-gu, Incheon City, 21924, South Korea.
| | - Vladimir N Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer's Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Md Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India.
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Doyle N, Simpson J, Hawes PC, Maier HJ. Coronavirus RNA Synthesis Takes Place within Membrane-Bound Sites. Viruses 2021; 13. [PMID: 34960809 DOI: 10.3390/v13122540] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/01/2021] [Accepted: 12/15/2021] [Indexed: 12/22/2022] Open
Abstract
Infectious bronchitis virus (IBV), a gammacoronavirus, is an economically important virus to the poultry industry, as well as a significant welfare issue for chickens. As for all positive strand RNA viruses, IBV infection causes rearrangements of the host cell intracellular membranes to form replication organelles. Replication organelle formation is a highly conserved and vital step in the viral life cycle. Here, we investigate the localization of viral RNA synthesis and the link with replication organelles in host cells. We have shown that sites of viral RNA synthesis and virus-related dsRNA are associated with one another and, significantly, that they are located within a membrane-bound compartment within the cell. We have also shown that some viral RNA produced early in infection remains within these membranes throughout infection, while a proportion is trafficked to the cytoplasm. Importantly, we demonstrate conservation across all four coronavirus genera, including SARS-CoV-2. Understanding more about the replication of these viruses is imperative in order to effectively find ways to control them.
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Abstract
Background: Conserved domains within SARS coronavirus 2 nonstructural proteins represent key targets for the design of novel inhibitors. Methods: The authors aimed to identify potential SARS coronavirus 2 NSP5 inhibitors using the ZINC database along with structure-based virtual screening and molecular dynamics simulation. Results: Of 13,840 compounds, 353 with robust docking scores were initially chosen, of which ten hit compounds were selected as candidates for detailed analyses. Three compounds were selected as coronavirus NSP5 inhibitors after passing absorption, distribution, metabolism, excretion and toxicity study; root and mean square deviation; and radius of gyration calculations. Conclusion: ZINC000049899562, ZINC000169336666 and ZINC000095542577 are potential NSP5 protease inhibitors that warrant further experimental studies.
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Tahir M. Coronavirus genomic nsp14-ExoN, structure, role, mechanism, and potential application as a drug target. J Med Virol 2021; 93:4258-4264. [PMID: 33837972 PMCID: PMC8250946 DOI: 10.1002/jmv.27009] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 12/20/2022]
Abstract
The recent coronavirus disease 2019 (COVID-19), causing a global pandemic with devastating effects on healthcare and social-economic systems, has no special antiviral therapies available for human coronaviruses (CoVs). The severe acute respiratory syndrome coronavirus 2 (SARS-Cov-2) possesses a nonstructural protein (nsp14), with amino-terminal domain coding for proofreading exoribonuclease (ExoN) that is required for high-fidelity replication. The ability of CoVs during genome replication and transcription to proofread and exclude mismatched nucleotides has long hindered the development of anti-CoV drugs. The resistance of SARS-CoV-2 to antivirals, especially nucleoside analogs (NAs), shows the need to identify new CoV inhibition targets. Therefore, this review highlights the importance of nsp14-ExoN as a target for inhibition. Also, nucleoside analogs could be used in combination with existing anti-CoV therapeutics to target the proofreading mechanism.
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Affiliation(s)
- Mohammed Tahir
- Department of BiologyUniversity of SulaimaniSulaimanyahKurdistanIraq
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Zuo J, Cao Y, Wang Z, Shah AU, Wang W, Dai C, Chen M, Lin J, Yang Q. The mechanism of antigen-presentation of avian bone marrowed dendritic cells suppressed by infectious bronchitis virus. Genomics 2021; 113:1719-1732. [PMID: 33865956 DOI: 10.1016/j.ygeno.2021.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 03/07/2021] [Accepted: 04/12/2021] [Indexed: 01/07/2023]
Abstract
Dendritic cells are first guard to defend avian infectious bronchitis virus (IBV) infection and invasion. While IBV always suppress dendritic cells and escape the degradation and presentation, which might help viruses to transfer and migrant. Initially, we compared two IBV's function in activating avian bone marrow dendritic cells (BMDCs) and found that both IBV (QX and M41) did not significantly increase surface marker of avian BMDCs. Moreover, a significant decrease of m6A modification level in mRNA, but an increased in the ut RNA were observed in avian BMDCs upon the prevalent IBV (QX) infection. Further study found that both non-structural protein 7 (NSP7) and NSP16 inhibited the maturation and cytokines secretion of BMDCs, as well as their antigen-presentation ability. Lastly, we found that gga-miR21, induced by both NSP7 and NSP16, inhibited the antigen presentation of avian BMDCs. Taken together, our results illustrated how IBV inhibited the antigen-presentation of avian DCs.
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Affiliation(s)
- Jinjiao Zuo
- College of Life Sciences, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Yanan Cao
- College of Veterinary Medicine, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Zhisheng Wang
- Institute of Veterinary Immunology and Engineering, National Research Center of Engineering and Technology for Veterinary Biologicals, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, PR China
| | - Abid Ullah Shah
- College of Veterinary Medicine, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Wenlei Wang
- College of Life Sciences, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Chen Dai
- College of Life Sciences, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Mingjia Chen
- College of Life Sciences, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
| | - Jian Lin
- College of Life Sciences, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China.
| | - Qian Yang
- College of Veterinary Medicine, Nanjing Agricultural University, Wei gang 1, Nanjing, Jiangsu 210095, PR China
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14
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Abstract
Introduction: The current SARS-CoV-2 pandemic urgently demands for both prevention and treatment strategies. RNA-dependent RNA-polymerase (RdRp), which has no counterpart in human cells, is an excellent target for drug development. Given the time-consuming process of drug development, repurposing drugs approved for other indications or at least successfully tested in terms of safety and tolerability, is an attractive strategy to rapidly provide an effective medication for severe COVID-19 cases.Areas covered: The currently available data and upcominSg studies on RdRp which can be repurposed to halt SARS-CoV-2 replication, are reviewed.Expert opinion: Drug repurposing and design of novel compounds are proceeding in parallel to provide a quick response and new specific drugs, respectively. Notably, the proofreading SARS-CoV-2 exonuclease activity could limit the potential for drugs designed as immediate chain terminators and favor the development of compounds acting through delayed termination. While vaccination is awaited to curb the SARS-CoV-2 epidemic, even partially effective drugs from repurposing strategies can be of help to treat severe cases of disease. Considering the high conservation of RdRp among coronaviruses, an improved knowledge of its activity in vitro can provide useful information for drug development or drug repurposing to combat SARS-CoV-2 as well as future pandemics.
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Affiliation(s)
- Ilaria Vicenti
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Maurizio Zazzi
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
| | - Francesco Saladini
- Department of Medical Biotechnologies, University of Siena, Siena, Italy
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Tang J, Fu C, Li Y, Chen S, Jiang X, Xu W, Xie H. Long Noncoding RNA OIP5-AS1 Promotes the Disease Progression in Nasopharyngeal Carcinoma by Targeting miR-203. Biomed Res Int 2021; 2021:9850928. [PMID: 33628831 DOI: 10.1155/2021/9850928] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 01/02/2021] [Accepted: 01/15/2021] [Indexed: 12/13/2022]
Abstract
Nasopharyngeal carcinoma (NPC) is a kind of malignancy generated from the nasopharyngeal epithelium. Recently, long noncoding RNA (lncRNA) has been shown to be involved in the regulation of many signaling pathways and is closely associated with carcinogenesis and tumor progression. However, the precise role of lncRNA Opa-interacting protein 5 antisense RNA 1 (OIP5-AS1) in NPC is not well understood. Here, we find that OIP5-AS1 is overexpressed in NPC patient specimens and NPC cell lines. Further investigations reveal that knockdown of OIP5-AS1 significantly inhibits the proliferation, migration, and invasion and accelerates the apoptosis of NPC cells in vitro. Consistent with these findings, NPC progression is significantly slowed in mice when OIP5-AS1 is knocked down. Interestingly, there is a functional link between OIP5-AS1 and microRNA-203 (miR-203), a tumor suppressor, in NPC cells. In conclusion, our data demonstrate that OIP5-AS1 plays an important role in the development and progression of NPC by targeting miR-203 and therefore provide a promising target for the treatment of NPC.
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Raj R. Analysis of non-structural proteins, NSPs of SARS-CoV-2 as targets for computational drug designing. Biochem Biophys Rep 2021; 25:100847. [PMID: 33364445 DOI: 10.1016/j.bbrep.2020.100847] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 10/12/2020] [Accepted: 10/27/2020] [Indexed: 11/23/2022] Open
Abstract
Background The ORF1ab of Severe Acute Respiratory Syndrome, SARS Corona Virus, SARS-CoV-2 genome is processed into 15 non-structural proteins, NSPs by proteases and each NSP has a specific role in the life cycle and pathogenicity of the virus. This research analyzes possible drugs for these proteins as targets in computational drug designing using already available experimental drugs from the drug bank database. Methods Out of 471 proteins and 8820 drugs download from Protein Data Bank, PDB and Drug Bank database respectively, 16 proteins similar to NSP 1-15 and 31 drugs as per the "Rule of three" were selected for docking. Out of 88 docking results using PyRx, 18 proteins/chains with three promising drugs, DB01977, DB07132 and DB07535 were analyzed using PyMOL for final results. Results NSPs 3, 5, 11, 14 and 15 were identified as targets for the drugs, DB01977, BD07132 and DB07535. Drugs, DB01977 and DB07535 bind in the same binding pockets of NSP 5 and NSP 15. Drug, DB07132 binds with more number of residues when compared with the other two drugs and this indicates that the strength of protein-drug association is more by this drug with the NSPs than other drugs. Binding pockets of NSPs for these three drugs are very close with many sharing residues in common suggesting of similarity of pharmacophore of these drugs with the target binding pockets. Conclusion The binding pockets of NSPs are well matched with the pharmacophore of drugs and with polar surface of drugs less than or equal to 100 A2, drugs, DB01977, DB07132 and DB07535 bind individually and effectively with NSPs 3, 5, 11, 14 and 15 of ORF1ab of SARS-CoV-2 genome to bring changes in the activity of SARS-CoV-2 which may be useful for biological and clinical considerations.
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Vijayakumar BG, Ramesh D, Joji A, Jayachandra prakasan J, Kannan T. In silico pharmacokinetic and molecular docking studies of natural flavonoids and synthetic indole chalcones against essential proteins of SARS-CoV-2. Eur J Pharmacol 2020; 886:173448. [PMID: 32768503 PMCID: PMC7406432 DOI: 10.1016/j.ejphar.2020.173448] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 07/29/2020] [Accepted: 07/29/2020] [Indexed: 01/18/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is distinctly infective and there is an ongoing effort to find a cure for this pandemic. Flavonoids exist in many diets as well as in traditional medicine, and their modern subset, indole-chalcones, are effective in fighting various diseases. Hence, these flavonoids and structurally similar indole chalcones derivatives were studied in silico for their pharmacokinetic properties including absorption, distribution, metabolism, excretion, toxicity (ADMET) and anti-SARS-CoV-2 properties against their proteins, namely, RNA dependent RNA polymerase (rdrp), main protease (Mpro) and Spike (S) protein via homology modelling and docking. Interactions were studied with respect to biology and function of SARS-CoV-2 proteins for activity. Functional/structural roles of amino acid residues of SARS-CoV-2 proteins and, the effect of flavonoid and indole chalcone interactions which may cause disease suppression are discussed. The results reveal that out of 23 natural flavonoids and 25 synthetic indole chalcones, 30 compounds are capable of Mpro deactivation as well as potentially lowering the efficiency of Mpro function. Cyanidin may inhibit RNA polymerase function and, Quercetin is found to block interaction sites on the viral spike. These results suggest flavonoids and their modern pharmaceutical cousins, indole chalcones are capable of fighting SARS-CoV-2. The in vitro anti-SARS-CoV-2 activity of these 30 compounds needs to be studied further for complete understanding and confirmation of their inhibitory potential.
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18
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Liang XY, Zhu QC, Liang JQ, Liu SY, Liu DX, Fung TS. Development of HiBiT-Tagged Recombinant Infectious Bronchitis Coronavirus for Efficient in vitro and in vivo Viral Quantification. Front Microbiol 2020; 11:2100. [PMID: 32983065 PMCID: PMC7485224 DOI: 10.3389/fmicb.2020.02100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 08/10/2020] [Indexed: 12/31/2022] Open
Abstract
Coronaviruses (CoVs) are enveloped (+) ssRNA viruses of veterinary and medical importance. Because recombinant CoVs with reporter proteins fused with viral proteins are usually non-viable or unstable, a small and quantifiable epitope tag would be beneficial to CoV research. In this study, we integrated the NanoLuc Binary Technology to the reverse genetics of infectious bronchitis virus (IBV), a prototypic gammacoronavirus. The 11-amino-acid HiBiT tag was inserted to the spike (S) or membrane (M) protein, and the recombinant IBVs (rS-HiBiT and rM-HiBiT) were characterized. Compared with the rIBV-p65 control, rS-HiBiT exhibited comparable growth kinetics, whereas rM-HiBiT replicated slightly slower. The levels of HiBiT-tagged S and M proteins in the infected cells or the culture supernatant could be both rapidly (~15 min) and efficiently (30 μL sample volume) determined using the HiBiT luminescence assay. Notably, replication of the HiBiT-tagged IBV could be monitored continuously in an infected chicken embryo, and rS-HiBiT was genetically stable for at least 20 passages. By integrating the HiBiT tagging system with CoV reverse genetics, this new reporter system may facilitate future study of CoV replication and pathogenesis.
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Affiliation(s)
- Xiao Ying Liang
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
| | - Qing Chun Zhu
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
| | - Jia Qi Liang
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
| | - Si Ying Liu
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China
| | - Ding Xiang Liu
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - To Sing Fung
- Guangdong Province Key Laboratory of Microbial Signals & Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
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19
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Romano M, Ruggiero A, Squeglia F, Maga G, Berisio R. A Structural View of SARS-CoV-2 RNA Replication Machinery: RNA Synthesis, Proofreading and Final Capping. Cells 2020; 9:E1267. [PMID: 32443810 PMCID: PMC7291026 DOI: 10.3390/cells9051267] [Citation(s) in RCA: 300] [Impact Index Per Article: 75.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 05/14/2020] [Accepted: 05/19/2020] [Indexed: 01/18/2023] Open
Abstract
The current coronavirus disease-2019 (COVID-19) pandemic is due to the novel coronavirus SARS-CoV-2. The scientific community has mounted a strong response by accelerating research and innovation, and has quickly set the foundation for understanding the molecular determinants of the disease for the development of targeted therapeutic interventions. The replication of the viral genome within the infected cells is a key stage of the SARS-CoV-2 life cycle. It is a complex process involving the action of several viral and host proteins in order to perform RNA polymerization, proofreading and final capping. This review provides an update of the structural and functional data on the key actors of the replicatory machinery of SARS-CoV-2, to fill the gaps in the currently available structural data, which is mainly obtained through homology modeling. Moreover, learning from similar viruses, we collect data from the literature to reconstruct the pattern of interactions among the protein actors of the SARS-CoV-2 RNA polymerase machinery. Here, an important role is played by co-factors such as Nsp8 and Nsp10, not only as allosteric activators but also as molecular connectors that hold the entire machinery together to enhance the efficiency of RNA replication.
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Affiliation(s)
- Maria Romano
- Institute of Biostructures and Bioimaging, IBB, CNR, 80134 Naples, Italy; (M.R.); (A.R.); (F.S.)
| | - Alessia Ruggiero
- Institute of Biostructures and Bioimaging, IBB, CNR, 80134 Naples, Italy; (M.R.); (A.R.); (F.S.)
| | - Flavia Squeglia
- Institute of Biostructures and Bioimaging, IBB, CNR, 80134 Naples, Italy; (M.R.); (A.R.); (F.S.)
| | - Giovanni Maga
- Institute of Molecular Genetics, IGM, CNR, 27100 Pavia, Italy;
| | - Rita Berisio
- Institute of Biostructures and Bioimaging, IBB, CNR, 80134 Naples, Italy; (M.R.); (A.R.); (F.S.)
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20
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Uchiumi F, Ogino Y, Sato A, Tanuma SI. Insights into the development of effective materials to suppress replication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). AIMS Bioengineering 2020. [DOI: 10.3934/bioeng.2020012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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21
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Abstract
Recent history is punctuated by the emergence of highly pathogenic coronaviruses such as SARS- and MERS-CoV into human circulation. Upon infecting host cells, coronaviruses assemble a multi-subunit RNA-synthesis complex of viral non-structural proteins (nsp) responsible for the replication and transcription of the viral genome. Here, we present the 3.1 Å resolution structure of the SARS-CoV nsp12 polymerase bound to its essential co-factors, nsp7 and nsp8, using single particle cryo-electron microscopy. nsp12 possesses an architecture common to all viral polymerases as well as a large N-terminal extension containing a kinase-like fold and is bound by two nsp8 co-factors. This structure illuminates the assembly of the coronavirus core RNA-synthesis machinery, provides key insights into nsp12 polymerase catalysis and fidelity and acts as a template for the design of novel antiviral therapeutics.
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Affiliation(s)
- Robert N Kirchdoerfer
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, HZ-102, La Jolla, CA, 92037, USA.
| | - Andrew B Ward
- Department of Integrative Structural and Computational Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, HZ-102, La Jolla, CA, 92037, USA
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