How Tsinghua’s Chemistry Wizards Are “Building” Proteins Like LEGO Blocks
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🎯 The Big Reveal Up Front: Chemistry Just Leveled Up!
Professor Liu Lei hosted a seminar on de novo chemical protein synthesis at City University of Hong Kong. His lab at Tsinghua University has developed a comprehensive methodological framework that transcends biological constraints, enabling synthesis of custom-designed proteins up to 3,000 amino acids—covering 99.7% of all natural proteins. Three key innovations form this framework: (1) peptide hydrazide ligation for convergent synthesis without protecting groups; (2) reversible auxiliary strategies using charged or carbohydrate tags to prevent aggregation during synthesis; and (3) artificial ligase enzymes that catalyze protein assembly in denaturing conditions. These techniques unlock “beyond-biology” applications including mirror-image D-proteins, site-specifically modified therapeutic targets, and rapid drug candidate synthesis. This post explores the chemistry breakthroughs, pharmaceutical implications, and synergies with AI-driven drug discovery that make chemical protein synthesis a game-changer for biomedical research.