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The genes that code for the enzymes responsible for maltose catabolism can only be transcribed in the presence of an activator. [3] The activator that controls transcription of the maltose enzymes is "off" in the absence of maltose. [3] In its inactive form, the activator is unable to bind to DNA and promote transcription of the maltose genes ...
The activator bound coactivator recruits RNA polymerase and other transcription machinery that then begins transcribing the target gene. A coactivator is a type of transcriptional coregulator that binds to an activator (a transcription factor ) to increase the rate of transcription of a gene or set of genes. [ 1 ]
The Ac Activator element is autonomous, whereas the Ds Dissociation element requires an Activator element to transpose. [1] Ac was initially discovered as enabling a Ds element to break chromosomes. Both Ac and Ds can also insert into genes, causing mutants that may revert to normal on excision of the element. [2]
Diagram of mediator with cyclin-dependent kinase module. Mediator is a multiprotein complex that functions as a transcriptional coactivator in all eukaryotes.It was discovered in 1990 in the lab of Roger D. Kornberg, recipient of the 2006 Nobel Prize in Chemistry.
In bacterial genetics, the mal regulon is a regulon - or group of genes under common regulation - associated with the catabolism of maltose and maltodextrins.The system is especially well characterized in the model organism Escherichia coli, where it is classically described as a group of ten genes in multiple operons whose expression is regulated by a single regulatory protein, malT.
The transactivator gene expresses a transcription factor that binds to specific promoter region of DNA. By binding to the promoter region of a gene, the transcription factor causes that gene to be expressed. The expression of one transactivator gene can activate multiple genes, as long as they have the same, specific promoter region attached.
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The dCas9-VPR activator increases transcription at the gene that it targets. The VP64-p65-Rta, or VPR, dCas9 activator was created by modifying an existing dCas9 activator, in which a Vp64 transcriptional activator is joined to the C terminus of dCas9. [ 1 ]