We narrowed to 820 results for: Ran

...modify a given gene. CRISPR-tranposons By combining CRISPR editing and transposons, the Sternberg and Zhang...developed CRISPR-transposons. The Sternberg lab's system called INTEGRATE (Insertion of Transposable Elements ... CAST (CRISPR-associated Transposase) both enable gRNA-directed transposition. INTEGRATE consists of four...multi-spacer CRISPR array, CRISPR-transposons can be multiplexed. Transcriptional repression (CRISPRi) in bacteria...proteins involved in the activation of transcription including transcription factors, phage proteins, and RNAP... unlike other organisms, CRISPR-induced double stranded breaks are lethal because the non-homologous end-joining...ineffective in bacteria, CRISPR-induced double stranded breaks (DSB) are lethal. Addgene depositor Luciano...

...Addgene Help Center: Tech Transfer Technology Transfer Information Tech Transfer News: A Reintroduction ...Addgene account for Tech Transfer Offices. They’re packed with tech transfer resources (summaries, electronic...question? Refer them to Addgene’s Tech Transfer Team: techtransfer@addgene.org Congratulations to the Golden...stats and strategies with tech transfer offices. Drop us a line at techtransfer@addgene.org. Albert Einstein...requests from Addgene MTA: material transfer agreement Technology Transfer: the exchange of intellectual property...addgene.org identifies the hold-up. Your Material Transfer Agreement is stuck in “pending.” Fear not, there... to make MTA turnaround faster with technology transfer offices (TTOs). The latest of these efforts is...

...protein Tat. Although CPP fusions can translocate a cell membrane, the presence of the CPP may alter protein... (78-79% after two rounds of transduction.) Compared to CCP transduction, iTOP is at least four times ..., and cell death post-transduction is low. Neuronal stem cells transduced with iTOP resulting in...lab suggests that primary cells may be better transduced using only protein. Read on for a description...description of the lab’s iTOP protein-only transduction method and its potential applications to CRISPR/Cas9 genome...genome editing.   Protein-only transduction? Niels Geijsen’s group in Utrecht wanted to pursue a nonviral...nonviral strategy for transducing primary cells. What if, instead of supplying a DNA construct, they could...

...required, through mitochondrial transfer. In the two decades since this transfer was first proposed, researchers...manipulation transplantation (AMT), CRISPR-modified adipocytes (fat cells) are transplanted as a mass that...visible chromoproteins in a cell-free transcription-translation system (Figure 6). This approach eliminates...uses a cell-free system to carry out transcription and translation of chromoprotein and gRNA plasmids. ... astrocytes Nerve-to-cancer cell mitochondrial transfer tracker Red calcium indicators PinkyCaMP and FRCaMPi...astrocytes and neurons to label surface proteins with a membrane-impermeable biotin substrate (Figure 1). Biotinylated...extracellular matrix proteins, cell adhesion molecules, transporters, ion channels, GPCRs, and more.  Figure...

... not appear to mind extraneous proteins bound to its outer mitochondrial membrane. Sequestration is accomplished...Updated mini-transposon vector for bacterial mutagenesis or gene targeting Victor de Lorenzo's lab...modular mini-Tn5 vector that can be used to generate random mutagenesis libraries or to insert heterologous...selecting the important elements from existing transposon and vector systems and creating an all-synthetic...validated this vector, called pBAM1, by conducting random mutagenesis in the soil bacterium Pseudomonas putida...family of GFP proteins in the cephalochordate Branchiostoma floridae, named bfloGFPs. They went on to characterize...mitochondrial turnover Mitochondrial health, transport and turnover are important features to be monitored...

...reagents can be delivered via transfection, nucleofection, viral transduction or injection as either protein...cell line that can be transfected at high efficiency. Lentiviral transduction Cas9 and gRNA can be present... present in a single lentiviral transfer vector or separate transfer vectors. May contain reporter gene...inserted into an AAV transfer vector and used to generate AAV particles. Transient or stable expression...Chemical transfection   Lipid mediated Cationic polymers Calcium phosphate Cells Transformed cell lines... lines Transformed cell lines Transformed cell lines Cargo Nucleic acids or protein Nucleic acids Nucleic... method: Do you need stable integration or is transient expression sufficient? Which cell types will you...

... could infect. Finally, the transfer plasmid encoded the desired transgene flanked by HIV-1 long terminal...integration. After co-transfection of these plasmids, 293T cells released transgene-containing lentiviral...protein), Pol (polymerase), Tat (viral transactivator for transcriptional activation from the 5’ LTR) and Rev...capacity of a lentiviral vector but for which transient transgene expression is sufficient. Lentiviral vector...include a large genetic capacity and the ability to transduce both dividing and non-dividing cells. Lentiviral...integrate into the genome, permitting long-term transgene expression, but they could only infect actively...infect non-dividing cells, but without sustained transgene expression. To design a viral vector system that...

...mammalian analogue of bacterial transformation is transfection. In stable transfection, DNA from the plasmid is...vectors delivered by transformation and transfection and left the business of transduction to our Viral Vectors... Plasmids 101: Transformation, Transduction, Bacterial Conjugation, and Transfection Plasmids 101: Choosing...to retain the vector as cells divide. In transient transfection, the vector remains episomal, meaning it...vector replication at all. In these cases, transient transfection may be sufficient for your needs even without...called transfer vectors. The gene of interest is cloned into a shuttle vector for transfection into producer...has seen before, showing how DNA sequences are translated into amino acids. And I was astonished that the...

...PHP.B has a >40-fold increase in CNS transduction and transduces the majority of astrocytes and neurons... mice whose CNS was transduced by PHP.B but absent in mice who were not transduced by PHP.B. The Deverman...These results were surprising because in vivo transduction of AAV serotypes generally tracks between strains...diverse library of AAV9 mutants that had a small randomized peptide loop inserted in the AAV9 capsid. This... an enhanced version of PHP.B, shows similar transduction efficiency, but at a log lower dose than PHP.B...permissive and six as non-permissive to PHP.B CNS transduction. Two genes were associated with the PHP.B permissive...outbred mice (F1) had half the level of CNS PHP.B transduction as their C57BL/6J parent. The second generation...

...find the subsequent transformation protocols below: Untergasser Lab Transformation of chemically competent... easily transformed without a heat-shock step. Because of the large number of transformations being performed...that transforms well in other competent cells) to ensure that your cells can be readily transformed. Compare...Want even more tips for transforming your cells? Check out our transformation guide.   ...We perform over 100 transformations each week at Addgene, so we need to be cost and time efficient. We...a little-known reagent for streamlining the transformation step. Read on to find protocols and tips that...competent cells. If you need a high efficiency of transformation (for example, if you are working with a library...

...libraries, chemical transformations can also be used. Efficiency for chemical transformations is less than that...for your transformation(s). The amount of competent cells you need total and per transformation may vary...the manufacturer’s protocol for transformation and expected transformation efficiency, or more specifically...with a large backbone might be more difficult to transform.    Figure 1: Factors to consider when ... coverage, since this will help decide what transformation efficiency you need to achieve. Most pooled...contains 5,000 plasmids, your goal for your transformation would be to obtain 100 x 5,000 = 500,000 colonies...likely rely on serial dilutions to estimate transformation efficiency (Figure 2).    Figure 2: ...

...Reverse transcription of the transgene occurs in the cytoplasm, then the resulting double-stranded DNA transgene.... However, IDLV genomes are transcriptionally active, leading to transient expression of gene products...lentiviral vectors is random, and the integration site will be different for each transduced cell, there’s no...mutagenesis (Howe et al., 2008). 2. Transient expression of transgenes/shRNAs If you want your cells to ...They rely on a viral protein called reverse transcriptase to convert their RNA genomes into DNA to be ...second-generation system as an example.  The lentiviral transfer plasmid encodes your insert of interest, flanked... larger protein: PR (protease), RT (reverse transcriptase), and IN (integrase). These viral packaging ...

... the transgene of interest. In our studies, mCherry interfered with the transport to the membrane of the...the hM4Di might improve the transport of this DREADD to the plasma membrane. The haemagglutinin (HA) tag...the expression of the transgene of interest and its localization in the membrane. The lesson we learned...2013) could help improve the transport of protein of interest the membrane.   Figure 1: Electron... the plasma membrane. Note that the use of the HA tag significantly improves the transport of hM4Di to...versatile method to identify the expression of transgenes of interest. Furthermore, fluorophore variants...only a small proportion were found on the plasma membrane (top panel in Fig. 1). Of course, this was problematic...

...tetracycline operators. Transcription can be turned on or off depending on what tet transactivator is used. UAS...for in vitro transcription, the promoter drives either the sense OR antisense transcript depending on ...This element is responsible for initiating the transcription of your insert into RNA. In practice, the term...controls the binding of the RNA polymerase and transcription factors, therefore promoters play a large role...expressed.      The RNA polymerase(s) RNA is transcribed from DNA using an RNA polymerase (RNAP). In bacteria...

... differences between transformation, transduction, conjugation, and transfection Resources on Addgene.org... in 3 different ways: Transformation grade DNA Cloning grade DNA Transfection grade DNA Figure...Figure 1: Transformation introduces transformation grade plasmids into a bacterial cell. Transformation...bacterial transformation of chemically and electrocompetent cells is minimal (picogram range). It can ...plasmids into mammalian cells? Use transfection grade DNA. Transfection is the process of inserting an ...Transformation grade DNA  Transformation is the process of inserting exogenous DNA in a microorganism. The amount ...without commercially available kits and DNA for transformation doesn’t need to be as pure as for other uses...

...they cannot cross cell membranes, so they are best used either with plasma membrane proteins (such as GPCRs... minimum energy transfer values you can expect, thereby establishing the dynamic range of your FRET assay...what's it good for? Fluorescence resonance energy transfer (FRET) is a biophysical interaction between two...first fluorophore (the donor) is excited, it can transfer energy directly via resonance to the second fluorophore...structural changes in the ribosome during protein translation (Ermolenko et al., 2007). All that is required...develop a successful FRET-based assay since energy transfer only occurs when donor and acceptor are close ...Å away from the donor doesn’t result in energy transfer and thus, your specific FRET signal is unaffected...

...project forward, transductions should not be rushed into. Before you start any transduction, you should always...Primers targeting the transgene are also beneficial as they ensure that the correct transfer plasmid was used... positive for vector encoded transgene expression following transduction with serial dilutions of a viral...resistance genes carried on transfer plasmids. Target cells are transduced with serial dilutions of a ... your packaging cell line, prepped your DNA, transfected and harvested your lentivirus. Now it’s time ...assaying for expression of a gene carried on the transfer plasmid or quantifying the number of viral copies...gag, WPRE, antibiotic resistance-genes, or the transgene itself. Many researchers prefer to design primers...

... polymerase and transcription factors. Since the promoter region drives transcription of a target gene...promoter to induce transcription of the phage repressor cI. Repressor cI inhibits transcription from phage promoter...lag time due to the time needed for transcription/translation. Many thanks to Nicole Zurcher who contributed... the promoter, turning it ON and initiating transcription.     Negative inducible In the OFF state, the...a bound repressor protein actively prevents transcription. Once an inducer binds the repressor protein...the DNA. With the repressor protein absent, transcription is turned ON. Types of inducible promoters Chemical...activator rtTA (reverse tetracycline-controlled transactivator) is normally inactive and cannot bind the tetracycline...

...packages have spent days to weeks in transit and some have been transported across oceans and continents. Each... treated to easily take in plasmids (transformation). Transformed bacteria are then grown up on antibiotics...received is immediately transformed and stored. Some samples need to be transformed with a micropulser using... performs an average of 140 transformations. The lab typically transforms newly deposited samples from...delivered by a mail courier and then the journey of transformation and storage begins. Some samples are submitted...long-term storage in our facilities, every sample is transferred to a 2D barcoded tube (see next section) and ...make a new tube from a replicate sample. The transformation After the DNA has been received and stored,...

...-visual G protein signal transducers (collectively known as the transducerome) that can be activated downstream...Resonance Energy Transfer (BRET). BRET is similar to Förster Resonance Energy Transfer (FRET), in which...non-visual G protein transducers. To use the TRUPATH system, cells are transfected with plasmids expressing...including smell, taste, sight, inflammation, and neurotransmission. But with approximately 950 different human...involved in sight (Olsen RHJ et al., 2020). A transducer complex consists of a trimer of three subunits...such a tool is being able to identify specific transducer complexes that are activated in response to a...fluorophore. The difference for BRET is that the energy transfer is between a luminescent donor and a fluorescent...