Bacterial Bioluminescence

Bacterial Bioluminescence - Bacterial Bioluminescence The...

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Bacterial Bioluminescence The expression of luminescence in Escherichia coli, a gram-negative rod has been determined to coincide with cell density which then enhances cell-cell interaction. The greater the density the more luminescence the bacteria will exhibit. The ability to emit bioluminescence is highly regulated because it expends a tremendous amount of energy. Therefore, a nutrient rich environment as well as high population density will promote luminescence. As population grows and reaches a certain threshold, more inducer is synthesized. The auto inducer is a signaling molecule excreted by the bacteria that binds to a receptor of a nearby bacterium. The receptors become fully activated with the increase of inducers. The receptor is a regulatory protein (luxR) that is expressed from a gene adjacent to the structural genes in the operon. The operon is called luxCDABE and it manages the bioluminescence pathway. When the inducer-receptor complex forms, it activates transcription of certain
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Bacterial Bioluminescence - Bacterial Bioluminescence The...

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