coordinated gene expression of bacterial gene clusters. Adjacent genes that are simultaneously switched on/off, behaving as single transcription units, yielding a polycistronic mRNA.
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How is polycistronic mRNA read?
by ribosomes, producing a single polypeptide. undergoes proteolysis to separate each protein coded by the different genes within the operon.
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What do polycistronic mRNA strands allow?
rapid production of all proteins needed in a process.
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What are transcriptional controllers?
repressors and activators.DNA binding proteins that interact with RNA polymerase or bind to DNA area close to the promoter region.
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What are coactivators?
needed by activators to switch on genes
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What are co repressors?
needed by repressors to switch off genes.
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What are the different ways that pre-transcription switches can work?
Increasing the amount of protein by increasing the gene copy number, Gene re-arrangements, by changing the position from an active to an inactive area or vice versa.
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Other cards in this set
Card 2
Front
What are operons?
Back
coordinated gene expression of bacterial gene clusters. Adjacent genes that are simultaneously switched on/off, behaving as single transcription units, yielding a polycistronic mRNA.
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