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Gene regulation in prokaryotes

Gene regulation in prokaryotes. March 27, 2006. Inducible transcription: lac operon. Inducible transcription: lac operon. Transcription termination by attenuation: trp operon. Transcription termination by attenuation.

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Gene regulation in prokaryotes

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  1. Gene regulation in prokaryotes March 27, 2006

  2. Inducible transcription: lac operon

  3. Inducible transcription: lac operon

  4. Transcription termination by attenuation: trp operon

  5. Transcription termination by attenuation Two possible base-pairing schemes within the mRNA at the beginning of the trp operon

  6. Transcription termination by attenuation Not enough tryptophan amino acids causes ribosome to stall on the mRNA  allows pre-emptor stemloop to form  termination does not occur Moving ribosome  pre-emptor structure does not form – terminator stemloop forms – terminates transcription of the rest of the mRNA

  7. Regulation in phage lambda()

  8. Regulation in phage lambda()

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