The trp operon

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Last updated 1:26 AM on 6/7/26
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9 Terms

1
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where is the trp operon found

E. coli

2
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what is the trp operon

group of genes that encode biosynthetic enzymes for the AA tryptophan

3
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when is the trp operon turned on

when trp levels are low

4
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what is the operon regulated by (2)

trp repressor

attenuation

5
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how many genes in operon

5, trp E - A

6
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what does tryptophan act as

co repressor

7
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what does trp do when it binds to the repressor

changes shape of repressor, activating it and causes it to bind to the DNA, preventing expression

8
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what is attenuation

Control mechanism that results in premature termination of transcription at the leader sequence - prevents completion of transcription

9
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how would you describe trp operon in an exam (4)

- how it regulates trp concentration

- how it saves energy

- trp is important for proteins

- encodes proteins to synthesize tryptophan