We narrowed to 1,147 results for: Gene

...activators and repressors to target genes. Repressing target genes using dCas9-based repressors Early ...of the gene of interest. dCas9-based repressors are useful when knocking out a particular gene isn’t feasible...repressing target genes in a variety of species and cell types can be found on Addgene’s website. Activating...activating target genes in a variety of species and cell types can be found on Addgene’s website. ...Designing or selecting a sgRNA Addgene may carry a validated sgRNA for your target gene.  Validated gRNAs are ... activate, repress, and even image your favorite gene. With so many Cas9 reagents available, it can be...introducing Cas9-mediated frameshift mutations in the gene of interest. The genomic target for Cas9 and the...

... this gene. Should you cut it at the beginning of the coding sequence to delete the entire gene? Perhaps... in vitro, and using it in mouse embryos to generate gene modified mouse lines. Hopefully this post will...they have been generated (more on that later). Find Validated gRNAs to Target Mouse Genes To begin the ...chances of gene modification in vivo. Find Plasmids for Testing Your gRNAs in vitro at Addgene CRISPR/Cas9...decide to do a gene modification experiment in mice to the day you have your F0 generation (barring life...Haoyi, et al. "One-step generation of mice carrying mutations in multiple genes by CRISPR/Cas-mediated ...blogger Samantha Young. The use of CRISPR/Cas9 for gene editing has expanded since its adaptation for use...

...knockout, activate or repress target genes in plants using the same general experimental design principles ...Resistance by CRISPR/Cas9-Targeted Mutagenesis of the ERF Transcription Factor Gene OsERF922. PLoS ONE 11:e0154027...for targeted modification of known or suspected genes that regulate a desired phenotype. In fact, CRISPR... can also be used to activate or repress target genes in plant cells, respectively. Cas9 expression is...regulate expression of longer RNAs (such as mRNAs for gene expression). Examples of commonly used RNA pol II..., activation and repression of target genes in plants and many of the aforementioned empty gRNA backbones...Agrobacterium tumefaciens as a vehicle to deliver your gene of interest into a target cell line or organism ...

..."Future of rAAV gene therapy: Platform for RNAi, Gene Editing and Beyond." Human Gene Therapy ja (2017...required for the onset of gene expression. However, it has yet to be determined what gene expression looks like...Additional Resources on the Addgene Blog AAV: A Versatile Viral Tool for Gene Expression in Mammals A Match...transport desirable or not desirable? If diffuse gene expression is tolerated, then axonal transport is...Otherwise, using a specific system for controlling gene expression such as Cre-lox, may be sufficient to...tool to use. However, we are starting to see that gene expression really does not take much time at all... normally require second strand synthesis before gene expression begins. ScAAV avoid this rate limiting...

... to make my first CRISPR/Cas9 gene edit. I wanted to inactivate the gene BRAF (a kinase implicated in ...Targeting different regions of the gene is also useful in case the gene has a weird mutation that you didn...each step of performing and analyzing a gene edit using Addgene’s lentiviral CRISPR tools. Schematic...Schematic overview of CRISPR/Cas9 gene editing process. See below for details. The entire process from start...what level of expression was the most efficient for gene editing. A virus encoding GFP plus a gRNA targeting...GFP gRNA, will edit out the virally-delivered GFP gene. So, cells with no Cas9 should appear green and ...multiple gRNAs to target different regions of your gene. I used existing BRAF gRNA viruses. There are a ...

...especially when fused to effector proteins for gene activation or gene editing. The more recently identified Cas12f...SEND for gene transfer with pseudotyped viral particles, expanding options for CRISPR or other gene delivery...editing systems improve gene editing performance at therapeutically relevant gene targets and expand the...version (named CasMINI) had the highest activity for gene activation  and base editing, whereas a different..., and fusogen in a modular system for delivering gene editing tools into cells. Image adapted from Segel...editing to correct mutations in a variety of target genes and cell types. Their Nature Biotechnology paper...tyrosinemia, where a pathogenic insertion within the FAH gene was precisely corrected, restoring expression in...

... transcription of a target gene, it therefore determines the timing of gene expression and largely defines...synthesis and allowing reporter gene transcription to take place. Addgene also has popular light-regulated...the promoter and ceases repression of the target gene. A simplified lac inducible system is found in many...shock-inducible Hsp70 or Hsp90-derived promoters, in which a gene of choice is only expressed following exposure to...inducible promoters Light is another way to activate gene expression, and two-component systems used in synthetic...promoter pR, preventing expression of a reporter gene. When light is present, YFI is inactive, preventing...experimental system. Leakiness If you’re expressing a gene that may be toxic, it’s important that your inducible...

...the plasmid containing the lethal gene. An example is the ccdB gene system commonly used in Gateway® Cloning...are rescued by genes supplied on the transformed plasmid. Such plasmids may contain genes that allow for...auxotrophic cell lines), or genes which rescue a lethal phenotype. Resources on the Addgene Blog Read Our Post...well-characterized bacterial lac operon contains a gene called lacZ that encodes for the enzyme β-galactosidase...discovered that deleting a section from the lacZ gene (a mutation called lacZΔM15) creates a non-functional...other methods. Positive selection vectors encode a gene which, when expressed, is lethal to the cell. Cloning...fragments are inserted into an MCS in the center of this gene, disrupting the lethality. This is similar to α-...

...number of genes involved in cardiovascular and metabolic diseases. We are knocking out genes that have...and find several mutations in the same gene or in multiple genes, all of which seem to contribute to a ...versions of 15 different disease-associated genes. Addgene spoke to Musunuru about how the new kit works, ...scenarios, you can either knock out a gene or knock in a mutation. Addgene: How do you use this kit to target... paper, for example, we generated hepatocytes to examine the effect of a gene on cholesterol metabolism...They do that by studying patients to uncover new gene variants associated with conditions of interest,...be advantageous if you are trying to knock out a gene. One can also exploit homology-directed repair by...

...used in the lab, the transposase gene is provided in trans so that a gene of interest can be inserted between... 2021).  Gene transfer Transposons are an alternative to viral vector delivery of transgenes, like for...response and are also easier and cheaper to generate. Gene disruption due to integration can occur for...several different applications (mutagenesis screens, transgenic animals, gene transfer). The discovery of ...bacteria, transposons can move antibiotic resistance genes between plasmids or from plasmids to the bacteria... genome. In humans, if a transposon jumps into a gene, it could be mutagenic and result in human disease... and mechanism of replication. They contain two genes: gag and pol. The pol polyprotein encodes the reverse...

...to investigate the roles of specific genes or to knock down genes with potentially harmful mutations in...target gene but have a lot of off-target effects. However, this is a common issue with many gene silencing...this could be applied to. When it comes to altering gene expression, CRISPR technologies have gradually taken...) is, as the name might suggest, an RNA-mediated gene silencing mechanism. RNAi was a landmark discovery...focusing on shRNA, one of the most popular choices for gene silencing. RNA interference RNAi is a useful tool... in therapeutic settings. Silencing of a target gene is achieved through the delivery of a double-stranded... these tools. Next time you need to knock down a gene, maybe you’ll consider using RNAi! References and...

...specific genes are signified with a minus sign (-) as is typically standard; just having the gene listed... of the more common genetic changes found in E. coli strains. Table 1: Common gene mutations found in ...carefully selected the optimal promoter for your gene of interest, painstakingly cloned into the perfect...backbone, made sure to add the right tags to your gene, and may have even put a fluorescent protein downstream...in E.coli strains Gene(s) Description Functional Consequence dam DNA adenine methylase mutation (GATC...methylation sensitive. dnaJ Mutation in a chaperonin gene Increases the stability of certain expressed proteins...encodes proteins needed for bacterial conjugation. Genes listed on F´ are wild-type unless indicated otherwise...

...aberrant activation of nearby genes. These safer vectors have become standard in gene therapy. Researchers have...condensed to create the 2nd-generation lentiviral system (Figure 2). The HIV genes that do remain are very...into the genome, they could promote oncogenesis by altering local gene expression. Self-inactivating (SIN... LM, Rebello T. J Gene Med. 2013 Feb;15(2):78-82. PubMed PMID: 23322669. 6. Genetic treatment of a molecular... Jr. Gene Ther. 2010 Feb;17(2):150-7. PubMed PMID: 19847206. Additional Resources on the Addgene Blog ...applications, and they’ve also had success in clinical gene therapy applications. Read on to learn more about...researchers are interested in developing these vectors for gene therapy. In 2003, VIRxSYS began the first clinical...

...MSCV (Murine Stem Cell Virus) sequences. Packaging genes (viral Gag-Pol): Gag is a structural precursor protein... protein, and Pol is a polymerase. Envelope gene (may be pseudotyped to alter infectivity): The use of...both lentiviruses and γ-retroviruses use the same gene products for packaging (Gag, Pol, and Env), the ...and/or Env, eliminating the need to deliver these genes in trans by specific plasmids. This method, therefore...standard γ-retroviruses use the Gag, Pol, and Env genes for packaging; however, they are different viruses...replication incompetent? Yes, as with lentiviruses, the genes required for γ-retroviral packaging and transduction...U3 region of the 3’ LTR and are primarily used in gene therapy research to reduce promoter interference...

...multiple gRNAs targeting a single gene can increase the likelihood of gene knockout, or multiple gRNAs may...genome editing has been used to study the effect of gene knockout in vivo and in vitro, as well as to insert...observe a phenotype, the modification of multiple genes is often necessary. Guide RNAs (gRNAs) are commonly... al constructed polycistronic glycine tRNA-gRNA genes (PTGs) in the forms tRNA-gRNA and tRNA-gRNA-tRNA...constructed PTGs containing 8 gRNAs targeting 4 MAPK genes, again using rice protoplasts. Each pair of gRNAs...may be used to target genes with overlapping activity. Multiple gRNAs can also facilitate deletions of...viruses have illustrated the power of polycistronic gene organization, and its translation to CRISPR/Cas9...

... or “LSL” cassette) upstream of a gene of interest will prevent gene expression in the absence of Cre....Cre-dependent gene knockout – conversely, putting the loxP sites on either side of a gene (called “floxing... loxP”), will permit gene expression until Cre is present, at which time the gene will be disrupted or...most common uses are listed below. Cre-dependent gene expression – placing a series of transcriptional... presence of Cre, the stop codon is excised, and gene expression proceeds. One popular lox-stop-lox plasmid...switch regions evidenced through Cre–loxP–mediated gene targeting. Gu, H., Zou, Y.R., and Rajewsky, K. 1993...reciprocal crossover event. This event can have three general outcomes based on the location and orientation ...

... (NHEJ) pathway disrupt target gene sequences (thus inactivating genes), while breaks repaired by homology...error-prone repair of the gene would be disastrous (i.e. if breaking the gene is worse than leaving the...(in our hands) this technique supports gene disruption or gene replacement frequencies that are an order...repair (HDR) pathways can modify the sequence of a gene (thus altering its function). HDR is crucial for...consistently supported higher frequencies (up to 60%!) of gene editing than single or double stranded donor DNA...editing, but it could be very useful to tackle genetic diseases in which sequence replacement holds some...PubMed Central PMCID: PMC4032847. Resources on the Addgene Blog Brush Up on Your HDR Basics Learn How to ...

... delete/overexpress endogenous genes or to introduce heterologous genes, but the trend of research has...tinkering with regulatory networks and multiplex gene control. However, these approaches are often met...mimic natural transcriptional programs on multiple genes. Modifying the CRISPRi system for multidirectional...programs to differentially alter the levels of five genes that encode biosynthetic enzymes for violacein, ...recruit various transcriptional regulators to alter gene expression at the targeted site. Multiple scaffold...simultaneous, multidirectional and tunable control of gene expression. This strategy can be applied to effectively...RNA-guided platform for sequence-specific control of gene expression. Cell, 152(5), 1173-1183. (2013). PubMed...

...profiles (Dwight, 2011).  Reference Genes  Choosing a set of reference genes deserves more attention than it...reference genes, plural. Your data will be much improved if you move to using multiple reference genes whenever...reference gene being a common choice - the frequently used GAPDH has noted issues as a reference gene (Higgins... Validation of Common Housekeeping Genes as Reference for qPCR Gene Expression Analysis During iPS Reprogramming... it usually receives. Different reference genes have shown to have as much as sixfold variation in expression...), so you’ll want to ensure that your reference genes are suitable for your cell lines and/or tissue types..., and it's possible to multiplex your reference genes to save on plate space. For many cell lines and ...

...easily modified to tag hundreds of genes, generating powerful genetic screening libraries. Additional protein... to screen for the genetically modified strains that contain your newly tagged gene. Most insertions can... to generate high-throughput targeting vectors. These vectors can be used to tag endogenous genes and ...-Throughput CRISPR/Cas9 Gene Modification in Caenorhabditis elegans.” Genetics. 202(4) (2016):1277-88....protein fusions is to replace the genomic copy of your gene of interest with a fluorescent protein fusion. CRISPR...allowed scientists to tag and light up endogenous genes of interest to better understand normal protein ...easily create C-terminal tag fusions of endogenous genes in human cells. To use CRISPaint, users need 3 vectors...