Synthetic proteins are laboratory-designed molecules that mimic or expand upon the functions of natural proteins. Synthetic proteins are primarily created using recombinant DNA (rDNA) technology. This process is the cornerstone of modern biotechnology and synthetic biology. Unlike natural proteins, which are limited to the 20 standard amino acids and the folding patterns evolved over billions of years, synthetic proteins can be engineered with precision to solve specific medical, industrial, or environmental problems.

Methods of producing Synthetic Proteins

1. Recombinant DNA Technology (Cell-Based):
A synthetic gene is inserted into a plasmid and introduced into host cells like Escherichia coli or yeast, turning them into factories that produce the desired protein. 2. Solid-Phase Peptide Synthesis (SPPS):
A purely chemical method where amino acids are sequentially added to a solid resin, building peptides step by step like assembling blocks. 

3. Cell-Free Protein Synthesis (CFPS):
Protein production occurs in a test tube using cellular machinery like ribosomes and enzymes without using whole living cells. 

4. AI design and Modeling:
Scientists use AI tools such as AlphaFold and Rosetta to design new proteins with specific structures. 

Key Applications