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Lac operon

Lac operon --> lactose operon

group of adjacent and coordinately controlled genes concerned with the metabolism of lactose in E. Coli. The lac operon was the first example of a group of genes under the control of an operator region to which a lactose repressor binds. When the bacteria are transferred to lactose containing medium, allolactose (which forms by transglycosylation when lactose is present in the cell) binds to the repressor, inhibits the binding of the repressor to the operator and allows transcription of mrna for enzymes involved in galactose metabolism and transport across the membrane (_ galactosidase, galactoside permease and thiogalactoside transacetylase).


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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)

... 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 ...

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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

... 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 ...

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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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