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

(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.

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.
References in periodicals archive ?
The bacteriophage e34 encodes a protein called the cI repressor that is like other phage repressors.
EX-527 decreased the CD4+Foxp3+CTLA4+ [T.sub.Reg] cell population able to express IL10 and TGF[beta] repressor cytokines and increased the proportion of CD4+ T cells able to express interferon [gamma].
In this model, the TF is neither a repressor nor an activator, only the number of TFs bound at the promoter sets whether a gene is transcribed or not.
First in the culture medium with xylan as the sole carbon source, second in the medium containing xylan as carbon source with glucose as repressor. Xylanase activity was calculated after an interval of 24 h for both the samples and maximum activity was observed after 120 h (Fig.
For instance, ZHX2 is considered as a transcriptional repressor [32], which binds the promoter regions, thus regulating transcription of their target genes.
Absence of gntP, gntZ transcription, and reduced level of gntK transcription in presence of glucose and transcription of all four genes in the presence of gluconate implied that Sco1678 is a gluconate-dependent repressor for the transcription of gnt genes.
Individuals with genotype II exhibited shorter body length than those with other genotypes, which might be related to the particular structure of ZNF132 as a transcriptional repressor. The mechanism might be that the individuals with genotype II enhanced the high expression of the ZNF132 gene, and then further inhibition effects led to low growth traits (Tovar et al., 2015).
If the segregation occurs, the V-GURT construct lose functionality and result on the suicide of plants grown from seeds that do not carry the repressor gene because the terminator gene will be expressed.
At the transcriptional level, the effect is dependent on the transcriptional repressor ICER, since silencing of ICER dampened the ability of palmitate to reduce Ib1 mRNA.
If the putative CA repressor hormone is in fact a CHH neuropeptide, it would not be the first time that this hormone family has been implicated in osmoregulation.
Their findings, published September 28 in Nature, show that over evolutionary time, primate genomes have undergone repeated episodes in which mutations in jumping genes allowed them to escape repression, which drove the evolution of new repressor genes, and so on.
"The protein Chrono binds to the regulatory region of clock genes, with its repressor function oscillating in a circadian manner.