regulator gene
Definition
Noun: A regulator gene is a specific type of gene that controls the expression of one or more other genes. It produces a substance, typically a repressor protein, that can inhibit or regulate the activity of an operator gene, thereby controlling the process of transcription in an operon.
Usage
The term is used primarily in the field of genetics and molecular biology to describe a gene involved in the regulation of gene expression. * In a bacterial operon, the regulator gene is often located upstream and produces a repressor. * The product of the regulator gene binds to the operator region to block RNA polymerase.
Examples
- The produces the Lac repressor, which controls the lactose operon in .
- Mutations in a can lead to the constitutive expression of the genes it normally controls.
- Scientists studied the to understand how the entire metabolic pathway was switched on and off.
Advanced Usage
- Regulatory Gene: This is a broader, often synonymous term for any gene involved in controlling the expression of other genes. A in the classic operon model is a specific type of regulatory gene.
- The concept is central to models of gene regulation, such as the Jacob-Monod operon model.
Variants and Related Words
- Regulatory Gene (n): A gene involved in controlling the expression of one or more other genes.
- Repressor Gene (n): A term often used interchangeably with when it specifically produces a repressor protein.
- Operator Gene (n): The gene region where the repressor, produced by the , binds.
- Structural Gene (n): A gene that codes for a protein (e.g., an enzyme) and whose expression is controlled by a .
Synonyms
- Control gene
- Regulatory gene
- Repressor gene (when context-specific)
Related Concepts (Not Phrasal Verbs or Idioms)
- Gene Expression: The overall process by which information from a gene is used to synthesize a functional gene product, which control.
- Operon: A functioning unit of DNA containing a cluster of genes under the control of a single promoter, typically regulated by a .
- Repressor Protein: The substance produced by a that inhibits transcription.
Noun
-
a gene that produces a repressor substance that inhibits an operator gene
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