Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

A-T to G-C base editing efficiency at targeted gene sites in HEK293T cell line

ABSTRACT: A-T to G-C base editing efficiency at targeted gene sites in HEK293T cells using the dCas12f-ABE design or the Cas12f-ABE design. Found that the total A-T to G-C conversion efficiency of Circular gRNAs exhibited about two-fold increase compared with U6 gRNAs. We further analyzed the pattern for A-T to G-C conversion on the target site, and observed that the most efficient base editing occurred in a narrow window A3 (3bp downstream of the PAM) similar to U6 gRNAs. In summary, Circular gRNAs with dCas12f-ABE design could enhance A-T to G-C base editing efficiency in a narrow window.

ORGANISM(S): Homo sapiens

PROVIDER: GSE260967 | GEO | 2024/03/11

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Transcriptomic profiling of HBG gene expression in HEK293T cell line

Project description:Efficiency of HBG gene activation by the Cas12f/cgRNA system. In a doxycycline-inducible dCas12f-VPR knock-in (KI) HEK293T cell line, transiently transfected plasmids encoding U6, linear, and circular gRNAs targeting HBG1, and cgRNAs targeting mNeonGreen (negative control, NC) to activate HBG gene expression. RNA-seq analysis showed that cgRNAs exhibited increased efficiency in the target gene HBG1 and slight lower specificity when compared with U6 and linear gRNAs.

2024-03-12 | GSE261105 | GEO

Project description:ABE-Ultramax for high-efficiency biallelic adenine base editing

| PRJNA1118794 | ENA

Project description:ABE-Ultramax for high-efficiency biallelic adenine base editing

| PRJNA1118438 | ENA

Systematic optimization of Cas12a base editors in wheat and maize using the ITER platform

Project description:Plant biotechnology needs new methods that accelerate design-build-test-learn cycles to develop new gene editing reagents. We have established ITER (Iterative Testing of Editing Reagents) based on arrayed protoplast transfections and high-content imaging, allowing one optimization cycle –from design to results– within three weeks. We validated ITER in wheat and maize protoplasts using Cas9 cytosine and adenine base editors and used it to develop an optimized LbCas12a-ABE system. Sequential improvement of five components –NLS, crRNA, LbCas12a nuclease, adenine deaminase and linker– led to a systematic, stepwise increase in ABE activity at extrachromosomal GFP reporter (from 0.5% to 40%) and endogenous target sites. We confirmed the activity of LbCas12a-ABE in stable wheat transformants and leveraged these improvements to develop a highly mutagenic LbCas12a nuclease and a LbCas12a-CBE. Our data show that ITER is a sensitive, versatile, and high-throughput platform that can be harnessed to accelerate the development of genome editing technologies in plants.

2022-11-21 | GSE200450 | GEO

Replacing the SpCas9 HNH domain by deaminases generates compact base editors with an alternative targeting scope

Project description:Base editors are RNA-guided deaminases that enable site-specific nucleotide transitions. The targeting scope of these Cas-deaminase fusion proteins critically depends on the availability of a protospacer adjacent motif (PAM) at the selected genomic locus, and is limited to a window within the CRISPR-Cas R-loop where single stranded (ss)DNA is accessible to the deaminase. Here, we reason that the Cas9-HNH nuclease domain sterically constrains ssDNA accessibility, and demonstrate that omission of this domain expands the editing window. By exchanging the HNH nuclease domain with an adenosine deaminase, we furthermore engineer adenine base editor variants (HNHx-ABE) with PAM-proximally shifted editing windows. HNHx-ABEs are substantially reduced in size, and expand the targeting scope of base editors. Our finding that the HNH domain is replaceable could moreover benefit future protein engineering efforts, where Cas9 operates together with other enzyme domains.

2020-11-12 | GSE161293 | GEO

Replacing the SpCas9 HNH domain by deaminases generates compact base editors with an alternative targeting scope [DNA-seq]

2020-11-12 | GSE161380 | GEO

Replacing the SpCas9 HNH domain by deaminases generates compact base editors with an alternative targeting scope [RNA-seq]

2020-11-12 | GSE161379 | GEO

Directed Evolution of an Adenine Base Editor withIncreased Activity and Context Compatibility [sgRNA-target library]

Project description:Adenine base editors (ABEs) are precise gene-editing agents that convert A:T pairs into G:C through a deoxyinosine intermediate. ABEs function most effectively when the target A is in a TA context. Deficient ABE processing of RA (R = A or G) is most evident when the target A is outside the comfortable editing window or when delivery is suboptimal. In the current study, we report directed evolution of TadA8r, a new variant of the Escherichia coli tRNA-specific adenosine deaminase (TadA) with ultra-fast deoxyadenosine deamination and no context bias.

2023-09-14 | GSE242012 | GEO

Homo sapiens

Project description:ABE base editing raw sequence reads

| PRJNA601886 | ENA

Base Editing Correction of a Hypertrophic Cardiomyopathy-Causing MYH7 Mutation in Human Cardiomyocytes and Humanized Mice

Project description:The most common form of genetic heart disease is hypertrophic cardiomyopathy (HCM), which is caused by mutations in cardiac sarcomeric genes and leads to abnormal heart muscle thickening. Complications of HCM include heart failure, arrhythmia, and sudden cardiac death. The dominant-negative c.1208 G>A (p.R403Q) mutation in b-myosin (MYH7) is a common and well-studied mutation that leads to increased cardiac contractility and HCM onset. Here we identify an adenine base editor (ABE) and single-guide RNA system that can efficiently correct this human pathogenic mutation with minimal off-target and bystander editing. We show that delivery of base editing components rescues pathological manifestations of HCM in iPSC-cardiomyocytes derived from HCM patients and in a humanized mouse model of HCM. Our findings demonstrate the use of base editing to treat inherited cardiac diseases and prompt the further development of ABE-based therapies to correct a variety of monogenic mutations causing cardiac disease.

2022-10-25 | GSE201755 | GEO

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data