Fusion Protein: Definition, Applications, and Examples

A fusion protein is a novel protein created by combining two or more independent proteins. This fusion is typically achieved through genetic engineering techniques, resulting in a single, continuous polypeptide chain. The resulting fusion protein can exhibit new or enhanced functionalities not present in the individual parent proteins, making them highly valuable in various fields like biotechnology and medical research.

Fusion proteins have diverse applications, including:

• Biotechnology: Used as markers, purification tags, and for enhancing protein properties.
• Medical Research: Serve as valuable tools for studying protein interactions, localization, and function.
• Therapeutics: Developed as therapeutic agents to target specific cells or deliver drugs, particularly for diseases like cancer and autoimmune disorders.

One prominent example of a fusion protein is the green fluorescent protein (GFP), widely used as a visual marker in molecular biology. Another example is antibody-drug conjugates (ADCs), which combine the targeting ability of antibodies with the potent cytotoxic effects of drugs, offering a targeted approach to cancer therapy.