Lect14-RegGeneExpProks

Lect14-RegGeneExpProks - Trans-acting molecules bind...

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Regulation of Gene Expression: Prokayotes
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Outline Background terms The Lac Operon The Trp Operon
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Outline Background terms The Lac Operon The Trp Operon
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Gene regulation terms Negative control : expression occurs unless shut off by regulator Positive control: Regulator molecule stimulated transcription Inducible system: System activated in presence of chemical substrates Represible system: System is deactivated in presence of chemical substrate Constitutive system: System is always
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Operons Group of genes is regulated/expressed as a unit Contain regulatory sequences ( cis- acting site) and structural genes
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Unformatted text preview: Trans-acting molecules bind cis-acting sites Protein:DNA interactions Only in Prokaryotes Outline Background terms The Lac Operon The Trp Operon The Lac operon Lac operon features Three structural genes: -galactosidase Permease Transacetylase Regulatory sequences Promoter Operator Lac operon components Mutations in Lac operon Mutations in Lac operon Dominant mutations of lac Catabolite repression of Lac Catabolite repression of Lac Glucose inhibits Adenyl Cyclase Outline Background terms The Lac Operon The Trp Operon...
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This note was uploaded on 09/23/2011 for the course BIOLOGY 283 taught by Professor Pedro during the Spring '11 term at UC Irvine.

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Lect14-RegGeneExpProks - Trans-acting molecules bind...

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