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Dictionary » P » Promoter

Promoter

Definition

noun, plural: promoters

(chemistry) A substance that is capable of increasing the activity of a catalyst to increase the rate of reaction.

(chemistry) A chemical that is supposed to promote carcinogenicity or mutagenicity.

(genetics) A site in a DNA molecule at which RNA polymerase and transcription factors bind to initiate transcription of mRNA.


Supplement

The site is actually specific DNA sequences that are recognized by transcription factors, which recruit RNA polymerase at the site.


Word origin: promote » Middle English promoten, from Old French promoter, from Latin prōmovēre, prōmōt- : prō-, forward + -er.

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Please Help

... of the following classes of genes do mutant genes fail to repress cell division? Silencer genes Oncogenes Tumor suppressor genes Operator genes Promoter genes 4.The reason v-oncs cause cancer whereas normal c-oncs do not is because: More than one v-onc occurs in the tumor cell C-oncs are never ...

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by kpax
Tue Aug 25, 2009 2:33 pm
 
Forum: Genetics
Topic: Please Help
Replies: 1
Views: 45

cdc25 and tyrosin-15

When there is no glucose in the media (-Glu) then the promoter will turn on and express your vector, which in this case is the cdc25. It will over produce this dephosphatase and the MPF will be active faster, which will push the cell cycle faster. It ...

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by kolean
Sun Aug 02, 2009 2:39 pm
 
Forum: Cell Biology
Topic: cdc25 and tyrosin-15
Replies: 1
Views: 96

cdc25 and tyrosin-15

... (Cdk). Dephosphorylation of tyrosine-15 of Cdk activates its kinase activity. You introduced a 2nd copy of the cdc25 gene under control of the Gal promoter. The Gal promoter is active when yeast cells are grown on media containing galactose and repressed in cells grown on media containing glucose. ...

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by jb0378
Wed Jul 29, 2009 10:18 pm
 
Forum: Cell Biology
Topic: cdc25 and tyrosin-15
Replies: 1
Views: 96

Two questions about operon (transcription/translation)

... it gets translated, does each gene have its own translation intiation site (ribosomal binding site)? Or does it only have one (like it has one promoter). 2. rRNA (5s/16s/30s, with ITS1/ITS2) are found in a bacterial genome together. Does this mean they are transcribed in an operon, or are they ...

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by farful
Mon Jul 27, 2009 5:33 pm
 
Forum: General Discussion
Topic: Two questions about operon (transcription/translation)
Replies: 2
Views: 106

A question from Cloning

... level there'd be problems as well. If you want to make freak hybrids, I suggest you stick to transfering genes of know function into appropriate promoter regions and see what happens ;)

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by biohazard
Fri Jul 17, 2009 6:05 am
 
Forum: Cell Biology
Topic: A question from Cloning
Replies: 16
Views: 491
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