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TopicDirected enzyme evolution
presented by IFRAH ISHAQ
UNIVERSITY OF THE PUNJAB,LAHORE
introduction
Directed Evolution is a general term used to describe various molecular biology techniques that mimic natural selection and are extremely useful for protein engineering.
These techniques involve randomly introducing mutations at the genetic level.
Steps of Directed enzyme evolution
1. Selection Of Gene2. A Library Of Mutant Genes3. Expression Of Mutant Genes4. Proteins Are Screened & Selected5. Variants With Modified Activity
Diagram representation
OCCURRENCE OF MUTAGENESIS
The formation of mutation in the gene of interest by the following ways: Error Prone PCR DNA Shuffling Saturation Mutation Chemical Mutagenesis
Goal: better luciferase
Industrial Enzymes Activity Improved By Directed Enzyme Evolution
Some of the examples explained below: Cephalosporins: class of antibiotic
– produced via the intermediate 7-aminocephalosporanic acid (7-ACA).
– Directed evolution has been used to improve the activity of cephalosporin acylases to produce these intermediates from adipyl-7-ACA or cephalosporin C.
Cephalosporins
Produced through intermediate
7-aminocephalosporanic acid
c
Atorvastatin drug• Atorvastatin• Is A Cholesterol Lowering Drug• Enzyme:2-deoxyribose- 5-phosphate
Aldolase (DERA)• Enzyme Target By Directed Enzyme
Evolution.
conclusion Directed evolution can be a powerful tool taking
advantage of nature’s power to improve upon itself Used in a wide variety of applications for protein
improvement – stability, activity, substrate specificity, etc
Potential for genetically engineering improved drugs or crops
Ultimately, combining tools will lead to better understanding and applications.
Thank you!!!