A unit that consists of one of more cistrons which function coordinateley under the control of an operator gene.
A genetic unit of transcription, typically consisting of several structural genes that are transcribed together; the operon contains at least two control regions: the promoter and the operator.
sequences of DNA, studied in bacteria, that control protein synthesis. The four major components include a regulatory gene, a promoter, an operator, and structural genes.
Transcriptional unit consisting of structural genes controlled by an adjacent operator (Lecture: The Bacterial Cell: Structure, Function, Growth, and Gene Regulation III, 1/31/02)
A sequence of adjacent genes read as a single, polycistronic mRNA. Changes in the level of transcription thus affects all of the genes in an operon, so such genes are often coordinately regulated. Includes both the structural genes, and the operator and promoter sequences that control them.
A prokaryotic DNA region that coordinates the regulatory and structural sequences for a gene or set of related genes.
n. A set of structural genes controlled by an adjacent site on a strand of DNA; their activity is manifested in the controlled synthesis (transcription) of mRNA; may be catabolite-sensitive or insensitive.
The genetic unit of prokaryotes, including the promoter, operator, and structural genes.
A group of genes which function as a collective unit. A cluster of genes whose expression is controlled by a single operator.
A locus consisting of two or more genes that are transcribed as a unit and are expressed in a coordinated manner.
a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
a cluster of adjacent genes that are all expressed from a single promoter, generating a single mRNA transcript from which individual proteins are translated
a cluster of bacterial genes along with an adjacent promoter that controls the transcription of those genes
a collection of inter-related genes including one which acts as a switch that governs the expression of the structural genes in the collection
a collection of linked genes under common, coordinate control
a coordinately regulated unit of transcription in bacteria
a group of genes that is arranged in a cluster and transcribed in a single mRNA
a set of adjacent genes on the same strand of DNA that are transcribed into a single mRNA molecule
a set of genes that are transcribed together
a set of genes that is transcribed as a single unit and expressed coordinately
a unit of bacterial gene expression and regulation, including structural genes and control elements in DNA recognized by regulator gene product(s)
A multigenic unit consisting of a regulator gene, a promoter-operator region and one or more other genes whose expression is regulated.
OP-er-on A series of genes with related functions and their controls. 327
Genes which are grouped together for coordinate regulation by the same regulator.
Sequence of genes responsible for synthesizing the enzymes needed for biosynthesis of a molecule. An operon is controlled by an operator gene and a repressor gene.
A set of genes transcribed under the control of an operator gene.
a set of contiguous prokaryotic structural genes that are transcribed as a unit, plus the adjacent regulatory elements that control their expression.
a unit consisting of one or more cistrons that function coordinately under the control of an operator gene. [Source: Agricultural Genome Information System, USDA
A set of one or more structural genes, an operator and a promoter that are transcribed as a unit and are expressed in a coordinated manner; they regulate bacterial gene expression.
A set of adjacent structural genes whose mRNA is synthesized in one piece, plus the adjacent regulatory signals that affect transcription of the structural genes.
Promoter-operator sequence serving more than one bacterial gene; part of a control that adjusts transcription rates up or down.
The group of contiguous genes in a bacterial chromosome that are transcribed into an mRNA molecule.
In bacterial DNA, a cluster of contiguous genes transcribed from one promoter that gives rise to a polycistronic mRNA.
An 'operon is a group of key nucleotide sequences including an operator, a common promoter, and one or more structural genes that are controlled as a unit to produce messenger RNA (mRNA). Operons occur primarily in prokaryotes and nematodes. They were first described by François Jacob and Jacques Monod in 1961.