Skip to main content
Addgene

Enter a sequence to perform a BLAST-based search of Addgene plasmid sequence databases.

In Category

We narrowed to 456 results for: PAC

Showing: 41 - 60 of 456 results

  1. Back to Bacteria: CRISPR gRNA Multiplexing Using tRNAs

    Type
    Blog Post
    Published
    June 2, 2015, 6:06 p.m.
    ...Cas9 multiplexing in systems with limited packaging capacity. Still confused about the various tRNA expression... will be necessary to improve its multiplexing capacity. Multiplexing is key due to the natural redundancy...often necessary. Guide RNAs (gRNAs) are commonly packaged in 400-500 bp cassettes containing the RNA pol...100 bases) limit the number of gRNAs that can be packaged together in a single vector. In addition, the ...forms tRNA-gRNA and tRNA-gRNA-tRNA, with short 5’ spacer sequences preceding gRNAs, to test for gRNA cleavage...predicted with no addition of nucleotides to the 5’ spacers. The 3’ ends were modified slightly with either...once, and each <200 bp tRNA-gRNA takes up half the space of a standard pol III-gRNA, which will facilitate...

  2. Delivery Methods for Generating iPSCs

    Type
    Blog Post
    Published
    April 17, 2018, 1:37 p.m.
    ...nondividing cells and have an ~8kb packaging capacity. With this packaging capacity, reprogramming factors can...other delivery methods. Retrovirus has a cloning capacity of ~8 kb, so either a single polycistronic vector...or multiple single-gene vectors can be used to package reprogramming factors. An important milestone of...and nondividing cells and have a larger cloning capacity (8-10 kb) than other retroviral vectors. This ...a vector and chromosomal DNA. PB has a cloning capacity of ~9-14 kb. This system is transfected into cells...simple and fast to evaluate. iPSCs should form compact colonies that are comprised of cells with a large...differentiated in vitro to form embryoid bodies which are compact balls of loosely organized tissues that express...

  3. What's New in CRISPR - November 2021

    Type
    Blog Post
    Published
    Nov. 18, 2021, 2:15 p.m.
    ...system is that it is too large to be effectively packaged into AAV particles for delivery into mammalian... much smaller and would be ideal for such AAV packaging, but their activity in mammalian systems has been... based systems, making it well suited for AAV packaging. Most importantly, this CasMINI system was shown...CasMINI plasmids Efficient CRISPR editing with a hypercompact Cas12f1 and engineered guide RNAs Yong-Sam Kim...result is a highly efficient Cas system with very compact genome editors and a gRNA down-sized by almost ...specifically binds its own mRNA to facilitate its packaging into virus-like particles. Feng Zhang’s lab adapted...the native PEG10 RNA sequences to instead drive packaging of cargo sequences in the capsid, in an approach...

  4. The Effect of COVID-19 on Liu Lab Plasmid Requests From Addgene Data

    Type
    Blog Post
    Published
    July 16, 2020, 1:15 p.m.
    ... across regions, with Europe most impacted and China least impacted. The inferred weekend effect is, in...date range is, they could be the most impacted or least impacted. These results highlight the instability... last six months, COVID-19 has had a tremendous impact on our world -- as of June 4, 2020, COVID-19 has...unique PIs/labs placing orders per day) on dates impacted by each effect. The inferred parameters suggest...methods for fundamental scientific discovery and high-impact applications.       Alvin Hsu is a graduate student...next-generation therapeutics. Prime editing, base editing, PACE, and DNA-templated synthesis are four examples of...

  5. Viral Genome Sequencing - A One Stop Shop for AAV Identity and Serotype Confirmation

    Type
    Blog Post
    Published
    April 23, 2020, 1:15 p.m.
    ...amount of spurious DNA from the packaging cell line, helper and packaging plasmids. We decided to use this... genome exists as [+] and [-] strands that are packaged at the same frequency, we reasoned that, following...viral genome sequencing to determine serotype AAV packaging is not perfect and while we think of the AAV vector...not require any additional reagents or lab work (Pacouret, 2017). Moreover, the sequencing data from multiple...Method for Rapid and Inexpensive Validation of Packaged Single-Stranded Adeno-Associated Viral Genomes...195–205 . https://doi.org/10.1089/hgtb.2019.110 Pacouret S, Bouzelha M, Shelke R, Andres-Mateos E, Xiao...

  6. CRISPR 101: Cytosine and Adenine Base Editors

    Type
    Blog Post
    Published
    Feb. 13, 2025, 2:15 p.m.
    ..., ABE8s resulted in 1.5-fold more editing at protospacer positions A5-A7 and 3.2-fold more editing at ...to ABE7.10. ABE8s have an improved base editing capacity, even at sites previously difficult to target....Joung’s lab created a dual-deaminase editor called SPACE (synchronous programmable adenine and cytosine editor...and adenine base editors Grünewald et al., 2020 SPACE   Fused cytosine and adenine base editors Walton...01532-7 Gaudelli, N. M., Komor, A. C., Rees, H. A., Packer, M. S., Badran, A. H., Bryson, D. I., & Liu, D.... J. M., Lee, S.-J., Liquori, A. J., Murray, R., Packer, M. S., Rinaldi, C., Slaymaker, I. M., Yen, J.,...020-0535-y Kim, Y. B., Komor, A. C., Levy, J. M., Packer, M. S., Zhao, K. T., & Liu, D. R. (2017). Increasing...

  7. Important Considerations When Using AAVs

    Type
    Blog Post
    Published
    June 13, 2017, 2:30 p.m.
    ...Richard J. Samulski. "Packaging capacity of adeno-associated virus serotypes: impact of larger genomes on...cells of interest. Although they have a small packaging capacity, AAV vectors were suitable for our needs ...recombinant adeno-associated viral vectors: packaging capacity and the role of rep proteins in vector purity...bleach solution should be used to clean AAVs from workspaces. Speed: AAV transduction experiments are ...

  8. Viral Vectors 101: An Introduction to AAV

    Type
    Blog Post
    Published
    May 30, 2023, 1:15 p.m.
    ...AAV components      Cargo capacity Empty rAAV has a cargo capacity of ~ 4.7 kb, meaning that your... is a single stranded, Parvoviridae DNA virus, packaged in a non-enveloped icosahedral capsid, that can...in recombinant AAVs (rAAVs) with maximum “trunk” space for genetic cargo. Typically, when researchers speak...the type of capsid (outer protein shell) used to package an rAAV vector; these capsids allow the virus to...design single rAAV vectors with multiple genes packaged in them and use elements such as IRES or 2A to...rescued from the vector plasmid and individually packaged into the AAV capsids. As a genome conversion in...

  10. #DeckTheLab with Tinsel and Test Tubes, Fa La La La La La La La La

    Type
    Blog Post
    Published
    Dec. 2, 2021, 2:15 p.m.
    ...simply embellish and adorn your lab space or your work from home space in a fun, festive holiday or winter...selected as a winner, you’ll receive a winter care package from Addgene.  Here are the details:   Contest...winter or holiday theme decor in your work from home space… but with a science twist. Maybe you have a collection...using life science catalog pages. Make your WFH space feel a little more festive this holiday season! ...Instagram as we share pictures of our decked out spaces.       ...

  11. CRISPR-mediated Plant Base Editors

    Type
    Blog Post
    Published
    Jan. 3, 2019, 1:35 p.m.
    ...based on the location of the ‘A’ relative to the protospacer adjacent motif (PAM). ABE7.10 can edit target...'A' if it lies in a small genomic window: at protospacer position 4-8 counting the ‘NGG’ PAM as 21-23 ...closer to the PAM, i.e., positioned at 8-10 in protospacer, ABE6.3 or ABE7.9 are better suited (Gaudelli...two Bsa1 sites to clone the single guide RNA (protospacer+scaffold) in a pol-III (OsU3) promoter driven...tRNA-gRNA (PTG) gene system to clone multiple protospacers which enables us to target more than one genomic...placed in 2-6 bp and 4-8 bp, respectively, of the protospacer. And if the target cytosine is closer to the ...depending on the location of your target base in the protospacer sequence. If you do not find a suitable ‘NGG’...

  12. IDP and your PI: A Roadmap for Career Planning and Personal Development

    Type
    Blog Post
    Published
    July 21, 2015, 2:30 p.m.
    ... Angela DePace has put personal development at the center of her lab (pictured above). DePace holds yearly...through thoughtful planning and honest feedback DePace’s yearly planning meetings revolve around two simple...tone of the meeting is almost more important. As DePace says, science is full of “terrible perfectionists...have tangible benefits for both PI and trainee. DePace and her lab members have noticed that the meetings... Park J, Bragdon MD, Lopez Rivera F, Biette KM, DePace AH. Mol Cell. 2015 Jun 4;58(5):718-21. doi: 10.1016...

  13. Viral Vectors 101: Parts of the AAV Transfer Plasmid

    Type
    Blog Post
    Published
    Aug. 11, 2020, 1:15 p.m.
    ...start making AAV:  the packaging plasmid which contains the structural and packaging genes, the adenoviral... what gets packaged into the AAV molecule. What’s outside of the ITRs does not get packaged in the AAV...AAV vector. The cloning capacity between the ITRs is ~4.4 kb. ITRs are inherently unstable due to their...propagation, with complete ITR loss abolishing AAV packaging. To prevent ITR loss, it’s best to propagate AAV...

  14. A History of Genome Engineering in Popular Culture

    Type
    Blog Post
    Published
    Feb. 25, 2020, 2:15 p.m.
    ... authors were exploring were space and robots. Warping to stars in space ships and the rise of killer ...How has scientific progress in genetic editing impacted the world of fiction and vice versa? We draw a...Into Darkness (2013) which is the remake of the space-melodrama Star Trek II: The Wrath of Khan (1982)... combined the worlds of genetic engineering and space travels. The movie sees the USS Enterprise crew ...science.1258096 Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH, Bryson DI, Liu DR (2018) Publisher...//doi.org/10.1085/jgp.36.1.39 Komor AC, Kim YB, Packer MS, Zuris JA, Liu DR (2016) Programmable editing...

  15. New and Upcoming Viral Vectors - September 2019

    Type
    Blog Post
    Published
    Sept. 12, 2019, 1 p.m.
    ...understanding how this molecule impacts neuronal circuits. We recently packaged a constitutive GABA sensor ...are small (20 ul) samples of EGFP-expressing AAV packaged in various serotypes. This collection is now complete... these vectors to more serotypes. We currently package four variants of these biosensors, which are optimized...for manipulating specific neurons. We recently packaged a soma-targeted opsin from Christopher Harvey’...Viral vectors coming soon! These vectors should be packaged and available as AAV in the next few months. Email...

  16. Viral Vectors 101: Types of viruses

    Type
    Blog Post
    Published
    June 6, 2023, 1:15 p.m.
    ... from. Lentiviruses have slightly larger packaging capacities than gamma-retrovirus, coming in around ... viruses are roomy: some adenoviruses pack up to ~35 kb of space for cargo! Adenovirus is an effective... cargo into a cell. These viruses have a cargo capacity of ~ 8 kb, ample room for most experimental needs...direct application of virus. However, the cargo capacity of AAV is ~4.7 kb, almost half that of lenti and...

  17. A New Generation of Adenine Base Editors Improves Editing in Primary Human Cells

    Type
    Blog Post
    Published
    May 7, 2020, 1:15 p.m.
    ... Depending on the position in the protospacer, the editing capacity of the ABE8s ranged from 1.5x higher...site in the genomic DNA to contain a specific protospacer adjacent motif (PAM) made up of 5′-NGG-3′ (“N...ABE8s demonstrate an overall improved base editing capacity, even at sites that used to be difficult to target....  References Gaudelli NM, Komor AC, Rees HA, Packer MS, Badran AH, Bryson DI, Liu DR (2017) Programmable...Edwards A, Gehrke JM, Lee S-J, Liquori AJ, Murray R, Packer MS, Rinaldi C, Slaymaker IM, Yen J, Young LE, Ciaramella...

  18. AAV Vector Quality Control: Going the Extra Mile with NGS

    Type
    Blog Post
    Published
    Sept. 12, 2017, 1:44 p.m.
    ...sequence all the DNA packaged inside the viral particles (Figure 1). Briefly, packaged DNA is extracted from... the helper plasmids or the cell genome can be packaged inside the vectors during production. These impurities... to determine the identity and serotype of the packaged DNA and look for potential contaminants. The ...mentioned earlier, it is common to find DNA from the packaging cell genome, bacterial genomes, cloning vectors...the recombinase for transgene expression. Once packaged in AAV, this pre-recombined DNA could lead to ...

  19. Viral Vectors 101: The Retroviral Lifecycle

    Type
    Blog Post
    Published
    July 27, 2023, 1:15 p.m.
    ...the genetic code for reverse transcriptase are packaged (Wu et al., 1997) inside of the capsid . This ...the vector particle, some of the RT protein gets packaged inside of the vector particle, along with its ...-type viral genome can direct the production, packaging, and release of progeny viral particles. And there...4355596 King, S. R., Duggal, N. K., Ndongmo, C. B., Pacut, C., & Telesnitsky, A. (2008). Pseudodiploid Genome... Temin, H. M. (1990). Genetic consequences of packaging two RNA genomes in one retroviral particle: pseudodiploidy...mouse embryo cell lines in which each cell has the capacity to be activated to produce infectious murine leukemia...

  20. CRISPR Between the Genes: How to Experiment with Enhancers and Epigenomics

    Type
    Blog Post
    Published
    Aug. 9, 2016, 2:30 p.m.
    ...action at a distance.” Through the marvel of DNA compaction, an enhancer can increase the expression of a...millions of base pairs away. (For details on DNA compaction and the structural proteins that make it possible...details. DNA is a 3D Fractal Figure 2: DNA compaction. Graphics courtesy of beyondthedish (left) and...tertiary structures (globules) to achieve exquisite compaction—on the order of 700 terabytes per gram—and form...chromosomes we all know and love. To understand compaction, suppose you have a piece string that’s 10 meters..., are mere millimeters apart. Similarly, cells compact DNA in a way that brings linearly distant regions...
Showing: 41 - 60 of 456 results