lac operon and trp operon ppt.induction and repression of enzymes

1. INDUCTION AND
REPRESSION OF ENZYMES
LAC OPERON AND TRP OPERON
BY-POOJA KAMBLE
M.Sc-I

2. • PSZO102:BIOCHEMISTRY AND METABOLISM-I
• UNIT 4:REGULATION OF METABOLISM
• 4.1.2-INDUCTION AND REPRESSION OF
ENZYMES( LAC OPERON AND TRP OPERON)

3. CONTENT
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INTRODUCTION
STRUCTURE OF
LAC OPERON
TRP OPERON
CONCLUSION
REFRENCE

4. INTRODUCTION
• OPERON is a co ordinated unit of genetic
expression in bacteria.

5. STRUCTURE OF LAC OPERON

6. 1.
2.
3.
4.
5.
STRUCTURAL GENES
PROMOTER
OPERATOR
REPRESSOR GENE
INDUCER

8. STRUCTURE OF TRP OPERON

9. 1.
2.
3.
4.
TRP REPRESSOR
LEADER RNA SEQUENCE
LEADER PEPTIDE SEQUENCE
ATTENUATER

10. ATTENUATION

11. CONCLUSION FOR LAC OPERON
• The lac operon has been key in the study of
genetic regulation
• scientists believe understanding the lac
operon will help to know how more
complicated genetic regulatory systems
behave

12. CONCLUSION FOR TRP OPERON
• This mechanism allows for synchronization of
transcription and translation, a key element in
attenuation.

13. REFRENCE
• BIOCHEMISTRY-U.Satyanarayana
• PRINCIPLES OF GENETICS-TAMARIN

14. • THANK YOU