In silico investigation of a novel anti EGFR Scfv –IL 24 fusion protein induces apoptosis in malignant cells

Abstract

Abstract Epidermal growth factor receptor (EGFR), a member of HER receptor family is over expressed in various cancer cells. Using tumor-specific antibodies to deliver cytotoxic agents directly to the tumor cells is an effective treatment strategy. Targeted therapy by fusing anti-EGFR scfv with tumor specific cytokines promises the emergence of new era. We designed a novel immuno-apoptotic fusion protein, anti EGFR Scfv-IL-24, consisting of a specific cancer cell targeting antibody and recombinant cytokine IL-24 to explore its anti-cancerous potential. Amino acid sequences of both anti EGFR scfv and IL-24 were fused using specific rigid linker. In silico characterization of the designed fusion protein like to predict the primary, secondary, physiochemical properties, quality and structural validation using online bioinformatic tools. Newly designed fusion protein consists of 402 amino acids that showed good quality with predicted value of 76.7% having 81.5% residues in most favored region as predicted by ERRAT2 and Ramachandran plot analysis. Docking and simulation studies were performed using HDOCK and Desmond module of Schrodinger. All the parameters of quality, validity, interaction analysis and stability suggested that the fused molecule is fully operational and functional. The results of the study supports that the anti EGFR Scfv-IL-24 fused protein could be proved as a novel candidate to combat cancer.