Crispr Effector
Crispr Effector - Related Videos
01:59
CRISPR
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2019
Genome editing technologies allow scientists to modify an organism’s DNA via the addition, removal, or rearrangement of genetic material at specific genomic locations. These types of techniques could potentially be used to cure genetic disorders such as hemophilia and sickle cell anemia. One popular and widely used DNA-editing research tool that could lead to safe and effective cures for genetic disorders is the CRISPR-Cas9 system. CRISPR-Cas9 stands for Clustered Regularly Interspaced Short...
12:23
Analysis of Yersinia enterocolitica Effector Translocation into Host Cells Using Beta-lactamase Effector Fusions
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Cited by 5 •
2015
Effector translocation into host cells via a type III secretion system is a common virulence strategy among gram-negative bacteria. A beta-lactamase effector fusion based assay for quantitative analysis of translocation was applied. In Yersinia infected cells, conversion of a FRET reporter by the beta-lactamase is monitored using laser scanning microscopy.
02:53
CRISPR and crRNAs
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2020
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea. The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
08:39
Electroporation of Functional Bacterial Effectors into Mammalian Cells
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Cited by 7 •
2015
Electroporation was used to insert purified bacterial virulence effector proteins directly into living eukaryotic cells. Protein localization was monitored by confocal immunofluorescence microscopy. This method allows for studies on trafficking, function, and protein-protein interactions using active exogenous proteins, avoiding the need for heterologous expression in eukaryotic cells.
04:41
Introduction of Bacterial Effector Proteins into Mammalian Cells by Electroporation
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2025
In this video, we demonstrate the introduction of bacterial effector proteins into mammalian cells by electroporation. The intracellular localization of the bacterial effector proteins is detected by confocal microscopy following staining with specific fluorophore-conjugated antibodies.
FAQs
Guide RNA base pairing provides the sequence-level address for an effector. Complementarity between the guide and an RNA-DNA or RNA-RNA target brings the protein to a defined nucleic acid sequence, rather than distributing activity broadly across the molecule. That localization determines where cleavage, regulatory action, or recruitment of another molecular activity can occur.
Cleavage-independent activity broadens what can be engineered. An effector does not have to cut its target to produce a useful outcome; it can alter gene expression or recruit molecular activities at a selected sequence. This distinction lets bioengineers choose between changing the nucleic acid itself and controlling cellular output while leaving the target uncut.
Cas9, Cas12, and Cas13 illustrate that CRISPR effector systems are not a single biochemical tool. The broader effector group can act on DNA or RNA and can support cleavage, gene-expression changes, or molecular recruitment. This diversity allows guide-RNA targeting logic to be matched with the type of intervention required in a bioengineering design.
Modularity comes from separating target recognition from the protein’s downstream activity. A guide RNA supplies complementary base-pairing information, while the selected effector supplies the biochemical response, such as cleavage or regulation without cleavage. Bioengineers can therefore redirect the same general targeting strategy toward different sequences and cellular objectives without treating every application as a conventional DNA-cutting experiment.
Planning begins by identifying the nucleic acid sequence and the intended outcome. The researcher then matches a complementary guide RNA with an effector whose activity fits that goal, choosing cleavage, transcriptional regulation, detection, or molecular recruitment as appropriate. The resulting design can be evaluated by whether it produces the intended sequence-specific change or cellular response.
CRISPR effectors support several distinct bioengineering workflows. Cleavage-enabled designs can be used for genome editing, whereas non-cleaving activities can regulate transcription or recruit molecular functions. Related systems also enable nucleic acid detection and targeted manipulation of cellular pathways. These options make effectors useful when the goal is either to alter genetic material or to control how cells use it.
In bioengineering, the relevant host context includes microbes, plants, and mammalian cells. The same guide-directed principle can be adapted to these settings, but the desired intervention may differ: genome editing, expression control, detection, or pathway manipulation. This cross-organism scope makes CRISPR effectors useful for comparing how programmable nucleic-acid targeting can produce engineered cellular behaviors.