In this discussion, you will describe an operon. There are many examples listed in Chapter 14, but if you want to choose an operon not described in your book, please ask me for approval. Make sure you do not pick the same operon as your classmates; we want to expose ourselves to as many regulation proteins and bacteria as possible.
In your initial discussion board post, please include the following: The Tryptophan(trp) Operon
1. Describe an operon, the regulatory proteins, the cellular process and the molecules being “sensed”.
2. Include details about the orientation of the genes and the promoter/operator sequences or activator binding site.
3. Provide details about the repressor/activator and inducer/inhibitor proteins.
4. Explain how the operon helps microbe survive and possibly thrive in its environment.
5. Include details about conditions that trigger expression of the gene(s).
6. Explain when this regulation occurs: During transcription, translation, or posttranslation
An operon is the genetic regulatory system found in bacteria and their viruses where genes coding for functionally related protein are clustered along the DNA. This allows protein synthesis to be controlled coordinatly in response to the needs of the cell. The trp operon in E. coli us a negative control repressible system, the trp operon is negative control because the system produces a repressor which functions to turn off the operon. The trp operon is a repressor operon because repression occurs when a critical substance is abundant in a cell. Trp is an important amino acid which most E. coli acquire by extracting from the material the cell consume or by manufacturing themselves. The genes controlled by the trp produce enzymes which are necessary for the cell to produce its own tryptophan.
The componets of the trp operon are the same as the ones in the lac operon. the