repressor


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Related to repressor: repressor gene, Lac repressor

repressor

 [re-pres´or]
that which restrains or inhibits; a specific protein molecule coded for by a regulatory gene, which acts through the cytoplasm to repress the synthesis of a specific protein.

re·pres·sor

(rē-pres'ŏr),
The product of a regulator or repressor gene; a molecular entity that prevents the transcription of regulator genes under control of an operator.

repressor

/re·pres·sor/ (-pres´er) in genetics, a substance produced by a regulator gene that acts to prevent initiation by the operator gene of protein synthesis by the operon.

repressor

(rĭ-prĕs′ər)
n.
1. also represser One that represses.
2. Genetics A protein that binds to an operator, blocking transcription of an operon and the enzymes for which the operon codes.

repressor

[ripres′ər]
Etymology: L, reprimere, to press back
a protein produced by a regulator gene in a bacterial genome. It binds to a sequence of nucleotides in an operator gene, blocking the transcription of one or more structural genes.

re·pres·sor

(rē-pres'ŏr)
The product of a regulator or repressor gene.

repressor

a substance, often proteinaceous, that prevents the function of a gene. see OPERON MODEL.

re·pres·sor

(rē-pres'ŏr)
The product of a regulator or repressor gene.

repressor

that which restrains or inhibits; a specific protein molecule coded for by a regulatory gene, which acts to repress the synthesis of a specific protein.

lac repressor
interacts specifically with the lac operator.
References in periodicals archive ?
To further check that the mutant has the ability to overexpress the xylanase gene in the presence of glucose or not, both wild type and mutant strains were grown in the presence of xylan as carbon source plus glucose as repressor in the culture medium.
The current experimental evidence shows the presence of a putative repressor substance in the eyestalk that specifically regulates CA expression/induction in the posterior gills.
The way this type of repressor works, part of it binds to a specific DNA sequence and part of it binds other proteins to recruit a whole complex of proteins that creates a repressive landscape in the genome.
We analyzed the effects of intentional suppression using two-way repeated measures ANOVA (between-subjects factor, repressor or nonrepressor; within-subjects factor, think, no-think, or baseline condition).
Global regulators for carbon metabolism: CRP (cAMP receptor protein) and Cra (catabolite repressor activator).
The CCS presented leaders of the three branches of government with the document, "To prosecute the dictatorship's repressors is to stop the repression of the Paraguayan people.
Another version of the video was then uploaded by a different YouTube user, who titled it "It's easy to laugh at the occupation when you're the repressor (and a douche bag).
This exemplifies the idea that repression is a vicious cycle that traps repressor and repressed alike.
The first genetic construct comprises a first regulatory region operatively linked to a gene of interest and at least one repressor sequence capable of controlling the activity of the first regulatory region.
We were interested in determining whether tobacco use was similar to alcohol use in its relation to repressor status.
We want to see whether a repressor gene, like flc in thale cress, exists in crops such as lychee or longan," explains Matusmoto.
It looks as though [the RNA] is switching it from a repressor to an activator," says Gage.