Crispr Rna
Crispr Rna - Related Videos
11:53
Substrate Generation for Endonucleases of CRISPR/Cas Systems
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Cited by 4 •
2012
CRISPR/Cas systems mediate adaptive immunity in Bacteria and Archaea. Many Cas proteins are proposed to act as endoribonucleases acting on crRNA precursors of varying length. Here we illustrate three different approaches to generate pre-crRNA substrates for the biochemical analysis of Cas endonuclease activity.
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...
06:48
CRISPR Guide RNA Cloning for Mammalian Systems
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Cited by 16 •
2018
Here, a simple, efficient, and cost-effective method of sgRNA cloning is outlined.
02:55
Genetically Modifying CAR T Cells Using a CRISPR-Cas9 System
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2025
The video outlines a process for creating genetically modified CAR T cells through the CRISPR-Cas9 System. Infecting T cells with CRISPR and CAR lentiviruses results in modifications to the target gene and the synthesis of a chimeric antigen receptor or CAR, ultimately leading to the formation of genetically modified CAR T cells.
04:22
A Technique for Gene Editing in Natural Killer Cells Using CRISPR Cas9
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2025
This video demonstrates a technique for Cas9 ribonucleoprotein-mediated genetic modification of primary natural killer (NK) cells. A Cas9 ribonucleoprotein, consisting of a Cas9 endonuclease bound to a guide RNA (gRNA) formed by base pairing a CRISPR RNA (crRNA) and a trans-activating crRNA (tracrRNA), is introduced into primary natural killer cells via electroporation. The ribonucleoprotein targets and cleaves the host DNA at the target site, leading to gene knockout via modification of the...
FAQs
The spacer and repeat regions contribute differently to CRISPR RNA function. The spacer supplies sequence complementarity to the intended nucleic-acid target, whereas the repeat helps the crRNA assemble with a CRISPR-associated, or Cas, protein. Keeping these roles distinct clarifies why both target-sequence selection and proper protein-RNA assembly matter when designing an RNA-guided system.
Target recognition depends on base pairing between the crRNA spacer and a matching DNA or RNA sequence. This pairing positions the assembled complex at the selected molecule, where the associated Cas protein can carry out cleavage or another molecular activity. Consequently, sequence matching is central to directing activity toward the intended site rather than a nonmatching sequence.
CRISPR RNA does not determine the outcome through sequence complementarity alone. Its interaction with a Cas protein creates the functional ribonucleoprotein complex, and the resulting activity can include cleavage or regulation depending on the system. This distinction matters because the same guide-based recognition principle can support different experimental goals without implying that every complex produces the same molecular effect.
Designing a crRNA requires attention to the spacer sequence and its complementarity to the chosen target. Researchers also need to account for the repeat region because it supports Cas-protein assembly. These design elements connect molecular recognition with downstream performance: an appropriate spacer helps position the complex, while compatible assembly enables the intended cleavage or regulatory activity.
A high-level workflow begins by selecting the DNA or RNA sequence to be recognized, then specifying a complementary spacer and retaining the repeat needed for Cas association. The resulting crRNA is paired with the appropriate Cas protein before target recognition is evaluated. This sequence-to-complex workflow provides a practical framework for planning targeted experiments.
CRISPR RNA supports several biological applications, including genome editing, gene regulation, diagnostics, and studies of microbial defense. The intended application determines whether researchers focus on targeted sequence modification, control of gene activity, detection of nucleic acids, or understanding how microorganisms use RNA-guided recognition. Thus, crRNA connects one molecular targeting principle with multiple research strategies.
In studies of microbial defense, crRNA helps researchers examine how sequence-guided recognition contributes to protection against genetic threats. Its spacer provides the targeting information, while the repeat supports association with a Cas protein that can produce downstream molecular activity. Investigating these features reveals how RNA-guided systems connect genetic sequence information with defensive molecular responses.