repressor

(redirected from Repressors)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Repressors: repressor gene, aporepressor

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 ?
The UC Santa Cruz researchers have, for the first time, identified genes in humans that make repressor proteins to shut down specific jumping genes.
Using the results of these tests as a guide we selected 27 undergraduates (13 repressors, 14 nonrepressors) to participate in the experiments (see Table 1).
In addition to CRP, a number of the genes for both glycolysis and gluconeogenesis are under the control of catabolite repressor activator (Cra), initially characterized as FruR (fructose repressor).
Alfredo Stroessner (1954-1989), the death of a repressor who had evaded legal action since the fall of the dictatorship, and the initiation of a campaign to investigate crimes of the past and try those responsible left President Fernando Lugo's progressive administration in an uncomfortable position and renewed longstanding denunciations of alleged interference by the US State Department and the Pentagon in Paraguay's internal affairs.
Repressors tend to focus their attention away from both negative life events and their negative psychological/somatic reactions to the events (Denollet, 1991).
The mechanism by which a key hormone called auxin regulates the growth and development of plants by promoting the degradation of repressor proteins has been discovered by researchers at The University of Texas at Austin.
Bonanno found that "grieving individuals who express strong negative emotions about their loss are worse off than the so-called repressors, who recover more rapidly," writes Sommers.
Mutants having alterations within operator sites occasionally exhibit a virulent phenotype because circulating repressors in the lysogen are unable to bind to mutated operator sites.
According to Hanna Kaminer and Peretz Lavie of the Israel Institute of Technology in Haifa, survivors who have been induced to "talk-it-out" fare significantly worse than repressors.
Their findings suggested that: (a) repressors gained less information about heart disease and its risk factors, (b) high-risk repressors reported more medical complications and lower levels of medical and psychological functioning at 6-month follow-up, and (c) low risk sensitizers reported poorer levels of social functioning.
Named for the Drosophila msh, the Msx proteins are homeodomain-containing DNA-binding proteins that can function as both transcriptional activators and repressors (Davidson, 1995).
We will surely carry on our consciences for the rest of our lives our repentance for not having done much more to prevent young people who belonged to our church from choosing guerrilla violence and to prevent the repressors from committing such aberrations against human rights," said a statement issued Monday by five bishops.