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Operon

Definition

noun, plural: operons

A group of genes or a segment of DNA that functions as a single transcription unit. It is comprised of an operator, a promoter, and one or more structural genes that are transcribed into one polycistronic mRNA.


Supplement

The operon acts as a unit of transcription, and functions in a coordinated manner to produce by transcription a single mRNA molecule which codes for more than one protein with related metabolic functions. The first described operon is the lac operon.


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Re: Odd mechanism for cancer

... especially in older articles. http://www.infoplease.com/cig/biology/regulation-gene-expression-prokaryotes-eukaryotes.html You should Google operon + interon + cancer, then when it asks "if you meant intron" at the top of the search, select the "no I really meant to search ...

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by oldfaithful
Thu Jun 26, 2014 12:56 pm
 
Forum: Cell Biology
Topic: Odd mechanism for cancer
Replies: 6
Views: 4272

Secondary Sugars(metabolism/sugar/bacteria/Lac Operon)

... but I stumbled across something that seemed to be of use; that secondary sugars might be sugars the require cAMP and CRP to be the effector of the operon(along with the operon inducer of course). Since gallactose is what the cell wants the most then the other metabolic operons(like lactose) should ...

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by Vulpess
Mon Dec 16, 2013 6:55 am
 
Forum: Microbiology
Topic: Secondary Sugars(metabolism/sugar/bacteria/Lac Operon)
Replies: 2
Views: 1934

Secondary Sugars(metabolism/sugar/bacteria/Lac Operon)

What are secondary sugars? I'm studying for the final tomorrow and we are focusing a lot on the lac operon series and some of the metabolic processes of sugars. I know that bacteria cells prefer galactose, but will still use lactose, so does that mean lactose is a secondary ...

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by Vulpess
Mon Dec 16, 2013 3:40 am
 
Forum: Microbiology
Topic: Secondary Sugars(metabolism/sugar/bacteria/Lac Operon)
Replies: 2
Views: 1934

RNA

... regulatory elements are in essence transcriptional regulators/promoter sequences that are categorized based on acting distance. The lac operon in E.coli is a typical example of a cis-acting element. Promoter sequences that regulate expression of the genes contained within the operon ...

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by nukeman
Thu Mar 28, 2013 2:21 pm
 
Forum: Molecular Biology
Topic: RNA
Replies: 6
Views: 17045

Genetics problems

Hii!!! I was wandering if a phenotype is expressed as a consequence of 2 different genes, are these genes part of an operon or are regulated by different promoters, meaning that can be located far away? ( in a prokaryotic organisms)??

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by simina
Mon Mar 18, 2013 1:31 pm
 
Forum: Genetics
Topic: Genetics problems
Replies: 3
Views: 4192
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