Total Synthesis of Biologically Potent Peptides and their In Silico Studies: A TAG Approach

Introduction: Current trends in peptide synthesis protocols have emerged as the most attractive domain in the field of pharma and medicine. Since most of the peptide/peptidomimeticbased molecules serve as potential candidates for many diseases, as they are bioavailable molecules. Methods: We present the synthesis of bioactive peptides through TAGGING approach with the help of TAG-OH as a linker to the Nα-protected amino acid. Results: FRDEHKK and NKDRG are two peptides that possess antioxidant and antiproliferative activity, and their in-silico investigations reveal that they exhibit anticancer properties when bound to the AXL kinase and EGFR proteins. Discussion: This TAG method enables the easy isolation of peptides at each step as solids, and all the impurities were washed off by simple filtration. The method allows a bulk-scale preparation of the peptides without any difficulty, and hence the protocol is highly efficient for the production of peptides of therapeutic importance. Conclusion: The two peptides FRDEHKK and NKDRG were isolated as fine solids with 82% and 85% yield and were characterized by NMR and MASS spectroscopy. In-silico studies reveal FRDEHKK and NKDRG peptides exhibit good affinity towards EGFR and AXL kinase.