Recombinant DNA

• Definition: Recombinant DNA is an artificially created DNA strand formed by combining two or more gene sequences.

• General Outline:

  • Cutting or cleavage of DNA by Restriction enzymes

  • Selection of an appropriate vector for propagating the recombinant DNA

  • Ligation of the gene of interest with the vector

• Three Applications of rDNA:

  1. Medicinal Application

  2. Agriculture Application

  3. Industrial Application

• Medicinal Application:

  • Production of antibiotics from Penicillium and Streptomyces fungi

  • Penicillin and streptomycin

  • Production of hormone insulin extracted from cows and pigs' pancreas

  • Production of vaccines by transferring antigen-coding genes to disease-causing bacteria

  • Production of interferon, antiviral proteins against serious infection

  • Production of enzymes like urokinase to dissolve blood clots

  • Gene therapy for replacing defective genes causing hereditary diseases

  • Solution of disputed parentage using recombinant technology

  • Diagnosis of diseases by testing DNA for genetic disorders

  • Production of transgenic animals carrying foreign genes

• Agriculture Application:

  • Distant hybridization

  • Development of transgenic plants

  • Development of root nodules in cereal crops

  • Development of C4 plants

  • Genetic editing and engineering for disease-resistant and flavorful varieties like bananas and tomatoes

• Industrial Application:

  • Production of chemical compounds, improvement of fermentation processes, and protein production from wastes using recombinant DNA

  • Development of efficient microorganism strains for industrial applications