Dcas12a Vpr
Dcas12a Vpr - Related Videos
07:19
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Cited by 1 •
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To reveal the pollinator effectiveness of a given plant species, multiple methods of field experiments have been developed. This study demonstrates the basic methods of field experiments for pollination ecology using the case study of Lycoris sanguinea var. sanguinea and the novel pollination mechanism, breaking-bud pollination.
10:46
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12:10
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09:20
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12:18
An Allelotyping PCR for Identifying Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium
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Cited by 2 •
2011
We describe a multiplex PCR for the rapid detection of Salmonella enterica serovars Enteritidis, Hadar, Heidelberg, and Typhimurium. Specific Salmonella serovars can be identified by targeting a multiplex PCR to genes and sequences unique to the O-antigen biosynthesis cluster and flagellin of a given serovar. Serovar is assigned then to a Salmonella isolate based on the appearance of specific, size amplicons (PCR product) corresponding to the target allele.
FAQs
The inactive Cas12a component retains its ability to associate with a guide RNA and recognize the corresponding DNA target, but it does not cleave the DNA. This distinction allows regulation to occur at the level of transcription rather than through a DNA break. For bioengineering, the system supports gene-control experiments while preserving the targeted DNA sequence.
Guide sequence choice determines which DNA region the dCas12a VPR complex is directed toward. Once bound, the complex can influence transcription of a nearby gene, so changing the guide provides a programmable way to compare activation of different endogenous targets. This targeting principle lets bioengineers connect selected gene regulation with downstream cellular functions.
The VPR domain supplies the transcriptional activation function associated with the targeted complex. After guide-directed binding, it recruits transcriptional machinery near the selected gene, promoting transcription from that location. This arrangement separates targeting from activation: the guide determines where regulation occurs, while VPR helps produce the activating effect needed to alter endogenous gene expression.
A conceptual experiment begins by selecting a guide sequence for the endogenous gene of interest and pairing it with dCas12a VPR. The guide directs the complex to the chosen DNA region, where VPR promotes nearby transcription. Researchers can then examine the resulting gene-expression change and use it to investigate gene function or altered cellular behavior.
The system can support targeted studies of endogenous gene function, construction of synthetic regulatory circuits, and efforts to reprogram cell behavior. These applications use the same programmable targeting principle for different design goals. Instead of changing DNA sequence, researchers can test how activating selected genes affects cellular functions and use those responses to develop engineered regulatory strategies.
Multiplexed guide arrays allow several guide sequences to be used in a single experiment, enabling coordinated regulation of multiple genes. This expands the approach beyond one-target studies and is particularly relevant to bioengineering designs that depend on linked gene activities. By activating selected genes together, researchers can investigate or construct more complex cellular regulatory programs.