Repressor Meaning: Definition, Examples, and Translations
🛑
repressor
[rɪˈprɛsər ]
Definition
genetics
A repressor is a DNA- or RNA-binding protein that inhibits the expression of one or more genes by binding to the operator or associated silencer region.
Synonyms
blocker, inhibitor, suppressor.
Which Synonym Should You Choose?
Word | Description / Examples |
---|---|
repressor |
Often used in molecular biology to describe a protein that inhibits gene expression.
|
inhibitor |
Frequently used in chemistry, biochemistry, and pharmacology to describe a substance that slows down or prevents a chemical reaction or other processes.
|
suppressor |
Used in various fields to describe a factor or substance that restrains or reduces the activity of another element. In genetics, it refers to a gene that suppresses the effect of another gene.
|
blocker |
Commonly used in everyday language and medicine to describe something that blocks or obstructs a process or pathway.
|
Examples of usage
- The lac repressor binds to the operator in the absence of lactose.
- When the repressor is bound to the operator, RNA polymerase is blocked from transcribing the genes.
- The trp repressor prevents the transcription of the tryptophan biosynthesis genes.
- The binding of the repressor to the operator is sensitive to the concentration of the specific metabolite.
- In the presence of the inducer, the repressor undergoes a conformational change and releases the operator.
Translations
To see the translation, please select a language from the options available.
Origin of 'repressor'
The term 'repressor' originated in the field of genetics in the mid-20th century. It was first used to describe proteins that regulate gene expression by inhibiting the transcription of specific genes. The discovery of repressors revolutionized our understanding of gene regulation and paved the way for further research in molecular biology and genetics.
See also: irrepressible, repression, repressive, unrepressed.
Word Frequency Rank
At rank #25,832, this word represents specialized academic or technical vocabulary. It's less frequently encountered but may be valuable in specific contexts.
- ...
- 25829 opportunist
- 25830 oversimplified
- 25831 untamed
- 25832 repressor
- 25833 iterated
- 25834 trill
- 25835 monogamy
- ...