operon
a unit of coordinately controlled genes under the influence of an operator and regulatory genes
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
Operon
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The operon as a unit of transcription
An operon is a unit of transcription consisting of one or more structural genes, and two associated segments of DNA:
an operator (the switch)
a promoter (a binding site for the transcription enzyme).
The Operon
Within its tiny cell, the bacterium E. coli contains all the genetic information it needs to metabolize, grow, and reproduce. It can synthesize every organic molecule it needs from glucose and a number of inorganic ions.
Operons
Operons are groups of genes that function to produce proteins needed by the cell. There are two different kinds of genes in operons: ...
Operon fusion
A construct that places the coding region of a gene downstream of the promoter for another gene, ...
operon
(op-ur-on) [L. opus, operis, work]
A unit of genetic function common in bacteria and phages, consisting of coordinately regulated clusters of genes with related functions.
opportunistic species ...
Operon A set of genes transcribed under the control of an operator gene.
Overlapping clones See: genomic library
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Operon model A model of prokaryotic gene regulation that consists of an operator sequence and its associated structural genes.
Operon
The term which Jacob, Perrin, Sanchez and Monod (1960) introduced for a group of closely-linked genes which appear to affect different steps in a single biosynthetic pathway and which apear to function as an integrated unit.
Operon
- A group of functionally related structural genes mapping close to one another in the chromosome, transcribed into a single mRNA, and the adjacent transcriptional control sites (promoter and operator)
Opiate Drugs ...
Operons are either inducible or repressible according to the control mechanism. Seventy-five different operons controlling 250 structural genes have been identified for E. coli.
operon A genetic unit consisting of a cluster of genes under the control of other genes, found in prokaryotes.
OPERON - A complete unit of bacterial gene expression and regulation, including the structural gene or genes, regulator gene(s), and control elements in DNA recognized by regulator gene products(s).
The operon model was proposed by Jacob, Monod, and Wollman based on studies on lactose-requiring mutations of E. coli.
The term introduced by Jacob, Perrin, Sanchez and Monod (1960) for the site at one end of an operon where a repressor molecule binds to the DNA and thereby inhibits transcription.
A control region at the promoter end of repressible amino acid operons that exerts transcriptional control based on the translation of a small leader peptide gene.
Transcription is closely linked to translation and if translation is retarded by limited supply of amino acyl trna for the specific amino acid, the mode of transcription of the leader sequence permits full transcription of the operon genes, ...
inducer gene - gene encoding the repressor protein of the lac operon; when lactose binds the repressor protein, the lac operon is induced.
Coli deficient in the tryptophan (trp) operon. One strain contained a mutation at position 46 of the trpA gene. The second strain contained a mutation at position 9578 of the trpB gene and the third contained both mutations.
attenuator An attenuator is the terminator sequence at which attenuation occurs. Attenuation describes the regulation of transcription that is involved in controlling the expression of bacterial operons.
 See also: Trans, DNA, Gene, Sequence, Protein
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