Crispr Base Editor
Crispr Base Editor - Related Videos
09:22
Functional Assessment of BRCA1 variants using CRISPR-Mediated Base Editors
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Cited by 1 •
2021
People with BRCA1 mutations have a higher risk of developing cancer, which warrants accurate evaluation of the function of BRCA1 variants. Herein, we described a protocol for functional assessment of BRCA1 variants using CRISPR-mediated cytosine base editors that enable targeted C:G to T:A conversion in living cells.
02:58
CRISPR-Mediated Base Editing Tools: A Genome Editing Technique to Induce Targeted Base Substitution
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2025
This video explains the concept of CRISPR-mediated cytosine base editors for inducing targeted nucleotide substitution.
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...
05:12
All-in-One CRISPR Genome Editing: A Method for Homology Directed Repair-Based Gene Knock-In in Cultured Cells Using CRISPR-Cas9 System
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2025
In this video, we demonstrate all-in-one CRISPR-Cas9 based genome editing in cultured cells where Cas9 and sgRNA are provided as a single plasmid construct to the cells. The CRISPR-Cas9 system and desired gene to be inserted was introduced in cells through electroporation technique to facilitate successful gene editing.
12:25
Epigenome-Wide CRISPR-Cas9-Based Knockout Screens on Chemoresistant Cells
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2026
Here, we present a protocol for generating chemoresistant cells using a dose-escalation approach, followed by a CRISPR/Cas9-based screen using a focused sgRNA library targeting epigenetic modifiers to identify regulators of acquired chemoresistance. The protocol also provides multiple optimization points tailored to chemoresistant cell models, offering a robust framework for researchers investigating resistance mechanisms.
FAQs
The guide RNA directs the catalytically impaired Cas protein to a selected DNA sequence, placing the adjacent target region where the deaminase can act. This positioning determines whether a cytosine or adenine is exposed for chemical conversion. Consequently, guide selection links the intended genomic location to the possible C-to-T or A-to-G substitution.
The DNA deaminase supplies the chemical activity that changes one base into another intermediate: cytosine becomes uracil, while adenine becomes inosine. DNA repair and replication then resolve these intermediates into defined substitutions. Because this reaction determines the available edit types, the editor can study selected point changes rather than relying on random mutagenesis.
A Crispr Base Editor makes a targeted single-base substitution without creating a double-strand DNA break. This distinguishes it from strategies that depend on breaking both DNA strands and may be less directly suited to precise point-variant analysis. In cancer research, the distinction supports focused testing of how individual nucleotide changes influence gene function or candidate variants.
First, the guide RNA and impaired Cas protein identify the selected DNA sequence. The attached deaminase converts the relevant cytosine to uracil or adenine to inosine. Subsequent DNA repair and replication process those altered bases, producing the corresponding C-to-T or A-to-G substitution. The final outcome therefore depends on targeting, enzymatic conversion, and cellular DNA processing.
Researchers can introduce a selected point mutation into a relevant genetic context and then examine its effects on gene function. The same approach can support testing of candidate cancer variants or correction of an existing point mutation. By changing a defined nucleotide rather than generating random mutations, experiments can more directly connect genotype with observed cancer-related effects.
Targeted substitutions can reveal whether a specific nucleotide change alters the function of a cancer-related gene. Researchers can also use the approach to evaluate candidate therapeutic targets by testing how precise genetic changes affect gene activity or variant behavior. These outcomes help distinguish the consequences of individual point mutations from broader effects caused by nonspecific mutagenesis.