repressor

re·pres·sor

R0164100 (rĭ-prĕs′ər)n.1. also re·press·er 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

(rɪˈprɛsə) n (Genetics) biochem a protein synthesized under the control of a repressor gene, which has the capacity to bind to the operator gene and thereby shut off the expression of the structural genes of an operon

re•pres•sor

(rɪˈprɛs ər)

n. a protein that binds DNA at an operator site and thereby prevents transcription of one or more adjacent genes.

Thesaurus

Noun

repressor - an agent that repressesrepresseragent - an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"

Translations

répresseuroppressore

repressor

repressor:

see nucleic acidnucleic acid,
any of a group of organic substances found in the chromosomes of living cells and viruses that play a central role in the storage and replication of hereditary information and in the expression of this information through protein synthesis.
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Repressor

a special regulating protein formed in bacterial cells that halts transcription, which is the synthesis of messenger ribonucleic acid (m-RNA) from a specific operon (a group of genes that carry out the synthesis of functionally related enzymes). The number of different repressors corresponds to the number of operons.

Unlike other proteins, a repressor present in a cell consists of ten to 20 molecules. The synthesis of m-RNA ceases when a repressor combines with an operator, which is the regulating part of an operon. An effector, for example, lactose in a lactose operon, interacts with a repressor to form a complex that inactivates and produces a reversible spatial change in a repressor molecule. This type of repressor can no longer combine with an operator and, as a result, m-RNA synthesis resumes.

repressor

[ri′pres·ər] (biochemistry) An end product of metabolism which represses the synthesis of enzymes in the metabolic pathway. (genetics) The product of a regulator gene that acts to repress the transcription of another gene.

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.

repressor

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repressor:

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Synonyms for repressor

noun an agent that represses

Synonyms

Related Words