Repressor Gene (Noun)
Meaning
Gene that prevents a nonallele from being transcribed.
Classification
Nouns denoting body parts.
Examples
- The repressor gene produces a protein that blocks the transcription of the operon, ensuring that the genes are not expressed unless necessary.
- In the lac operon, the lacI gene is a repressor gene that regulates the transcription of the lacZYA genes by preventing RNA polymerase from binding to the promoter.
- When the repressor gene is activated, it produces a protein that binds to the operator region, blocking the transcription of the adjacent genes.
- The repressor gene plays a crucial role in maintaining the dormant state of the phage, preventing the expression of genes that would lead to the production of new phage particles.
- The presence of a repressor gene in the genome allows the cell to tightly regulate the expression of certain genes, preventing their transcription unless specific conditions are met.