CRISPR-Cas9 is one of the most disruptive tools in molecular biology. It allows researchers to edit DNA with unprecedented precision and efficiency. Adapted from a natural immune system in bacteria, the CRISPR system uses a guide RNA to target specific genetic sequences, and an enzyme (Cas9) to cut the DNA.
Key Applications:
- Correction of inherited mutations such as those responsible for cystic fibrosis and sickle cell disease
- Functional genomics: disabling or enhancing specific genes to study their roles in development and disease
- Agricultural improvement: making crops more resilient to climate stress, pests, or soil conditions
Beyond Cas9, newer variants like CRISPR-Cas12, Cas13, and base editors are expanding the toolbox for gene regulation, epigenetic editing, and RNA targeting.