List of Articles In silico

• Open Access Article
  • Abstract Page
  • Full-Text
  
  1 - Evaluation of Eugenol effect, active compound of clove oil, on growth inhibition of methicillin resistant isolates of Staphylococcus aureus through potential interaction with PBP2 and downregulation of mecA gene
  Nahid Khodadadi Somayeh Ataei-e Jaliseh
  Background and Objectives: Eugenol is the major constituents of clove oil, which is known as an anti-bacterial and anti-oxidant agent. Staphylococcus aureus is most common pathogens that cause nosocomial infections and some bacterial infections death. In this study, the More

  Background and Objectives: Eugenol is the major constituents of clove oil, which is known as an anti-bacterial and anti-oxidant agent. Staphylococcus aureus is most common pathogens that cause nosocomial infections and some bacterial infections death. In this study, the effect of Eugenol on the expression of mecA gene and the interaction with mecA protein (PBP2a) was evaluated in methicillin resistant isolates of Staphylococcus aureus. Materials and methods: Antibacterial activity of Eugenol was investigated in isolates of Staphylococcus aureus with DISC diffusion, MIC and MBC. Interaction between Eugenol and mecA protein (PBP2) was evaluated with bioinformatic approaches. The expression of mecA gene was assessed in Eugenol treated and untreated isolates by Q-RT-PCR. Results: results of this study showed that Eugenol inhibited bacterial growth in the DISCs in 80% of Staphylococcus aureus isolates. MIC and MBC of Eugenol in the most isolates were determined 5.22 mg/ml and 10.44 mg/ml, respectively. In silico analysis showed interaction between Eugenol and mecA protein (PBP2). mecA gene downregulated in Eugenol treated isolates (5.22 mg/ml) in compared to control. Conclusion: It seems that Eugenol led to growth inhibition of Staphylococcus aureus isolates through both interaction with PBP2 and mecA gene downregulation. Manuscript profile
• Open Access Article
  • Abstract Page
  • Full-Text
  
  2 - In silico analysis of pMGA1.2 protein of Mycoplasma gallisepticum in vaccine and pathogenic strains
  Farzaneh Pourkarimi Fatideh Majid Esmaelizad Mohammad Kargar Majid Tebianian Farshid Kafilzadeh
  10.30495/jmw.2023.1982503.2058
  Background & Objectives: Mycoplasma gallisepticum, the pathogen responsible for chronic respiratory disease in chickens, is the most economically important species of Mycoplasma that causing tremendous economic losses worldwide. The most abundant membrane proteins i More

  Background & Objectives: Mycoplasma gallisepticum, the pathogen responsible for chronic respiratory disease in chickens, is the most economically important species of Mycoplasma that causing tremendous economic losses worldwide. The most abundant membrane proteins in M. gallisepticum are pMGA, lipoproteins of about 67 kDa. The pMGA family genes have an extraordinary potential for diversifying antigenic structure on the surface of Mycoplasma gallisepticum cells. The aim of this study was to compare the pMGA protein patterns between different strains and hosts of Mycoplasma gallisepticum. Material & Methods: All Mycoplasma gallisepticum full genomes available in GenBank till January 2020 were considered and pMGA1.2 sequences were identified, grouped and coded. pMGA1.2 protein with a chain of 650 amino acids between two different hosts (poultry and house finch) was studied by bioinformatics software in all Mycoplasma gallisepticum full genomes. Results: pMGA1.2 gene among different strains of Mycoplasma gallisepticum showed five major groups with more than 10 percent divergence. Based on multiple sequence alignment, a specific pattern was identified in house finch isolates. Interestingly, two specific motifs 480DNQNVSNQ487 and 639SSNVSSPSY647 were found in the pMGA1.2 of TS-11 strain, which can probably be used as markers to identify and differentiate this vaccine strain from pathogenic Mycoplasma gallisepticum. Conclusion: This study showed that pMGA1.2 protein have some B-cell epitope antigenic regions that are conserved among all isolates and might be applicable to design serological test for detection antibody against Mycoplasma gallisepticum. Manuscript profile