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Topic Directed enzyme evolution presented by IFRAH ISHAQ UNIVERSITY OF THE PUNJAB,LAHORE

Directed Enzyme Evolution

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Page 1: Directed Enzyme Evolution

TopicDirected enzyme evolution

presented by IFRAH ISHAQ

UNIVERSITY OF THE PUNJAB,LAHORE

Page 2: Directed Enzyme Evolution

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.

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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

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Diagram representation

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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

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Goal: better luciferase

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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.

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Cephalosporins

Produced through intermediate

7-aminocephalosporanic acid

c

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Atorvastatin drug• Atorvastatin• Is A Cholesterol Lowering Drug• Enzyme:2-deoxyribose- 5-phosphate

Aldolase (DERA)• Enzyme Target By Directed Enzyme

Evolution.

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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.

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Thank you!!!