BIO311C_F07_Gene regulation in bacteria

BIO311C_F07_Gene regulation in bacteria - Gene regulation...

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Unformatted text preview: Gene regulation in bacteria Pages 352-356 We will cover Constitutive and Regulated gene expression Positive and negative regulation of genes Operon Inducible and a repressible operon Concept of inducer and repressor Lac operon Trp operon Constitutive expression Always turned on Regulated expression Turned off till needed by cell Studies of Studies of E. coli E. coli metabolism metabolism This involves interaction of specific regulatory proteins to DNA targets to control transcription TRANSCRIPTION FACTORS E. coli- only 5% transcribed at any one time GENE EXPRESSION is regulated - genes are activated (turned on) when needed and repressed (turned off) when not needed Role of regulatory proteins in transcription regulation Role of regulatory proteins in transcription regulation Turns on Turns off Negative Regulation Inducible Gene off (by repressor), until turned on by inducer Repressible Gene is always turned on, until turned off by a repressor General Organization of an Inducible Gene...
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BIO311C_F07_Gene regulation in bacteria - Gene regulation...

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