New England Biolabs Canada
Expand menu
Sign In or Sign UpMy NEB

SHuffle® T7 Express lysY Competent E. coli

Catalog # Concentration Size List Price Quantity Your Price
C3030J 12 x 0.05 ml $383.00
$344.70
Catalog # Size List Price Your Price
C3030J 12 x 0.05 ml $383.00
$344.70
Catalog #
Qty:
 
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca

Chemically competent E. coli cells suitable for T7 protein expression with enhanced capacity to correctly fold proteins with multiple disulfide bonds in the cytoplasm and with enhanced reduction of basal expression.

  • T7 expression
  • Engineered E. coli B strain to promote disulfide bond formation in the cytoplasm
  • Control of T7 RNA Polymerase by lysozyme allows potentially toxic genes to be expressed
  • Deficient in proteases Lon and OmpT
  • Resistant to phage T1 (fhuA2)
  • Free of animal products
  • No dry ice surcharge with NEB competent cell shipments
Featured Videos
View Video Library
  • Monarch_MiniprepProtocol_VideoThumb
    Stages of SHUFFLE® Optimization
  • Monarch_MiniprepProtocol_VideoThumb
    Fast transformation plating with glass beads
  • Monarch_MiniprepProtocol_VideoThumb
    What is a Disulfide Bond (1 of 4)

Chemically competent E. coli B cells engineered to form proteins containing disulfide bonds  in the cytoplasm. Suitable for T7 promoter driven protein expression of toxic proteins.

Highlights
  • Engineered E. coli B strain to promote disulfide bond formation in the cytoplasm
  • Constitutively expresses a chromosomal copy of the disufide bond isomerase DsbC
  • DsbC promotes the correction of mis-oxidized proteins into their correct form (1,3)
  • The cytoplasmic DsbC is also a chaperone that can assist in the folding of proteins that do not require disulfide bonds (4)
  • Expresses a chromosomal copy of T7 RNAP
  • Inactive mutant lysozyme expressed from miniF plasmid
  • Allows for the expression of toxic proteins
  • Enhanced BL21 derivative
  • Resistance to phage T1 (fhuA2), Cam, Nit, Spec, and Str*

    *Resistance to low levels of streptomycin may be observed.
Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  SHuffle® T7 Express lysY Competent E. coli C3030JVIAL -80 12 x 0.05 ml
Features
  • T7 expression
  • Protease deficient/B strain
  • Tightly controlled expression of toxic proteins
  • Enhanced capacity to correctly fold proteins with multiple disulfide bonds in the cytoplasm
Application Features

Figure 1, vtPA activity assayed from crude lysates: Figure 1, vtPA activity assayed from crude lysates:
Truncated tissue plasminogen activator (vtPA), which contains nine disulfide bonds when folded and oxidized correctly, was expressed from a pTrc99a plasmid in the cytoplasm of E. coli cells. After induction, cells were harvested and crude cell lysates were prepared. vtPA was assayed using a chromogenic substrate Chromozym t-PA (Roche #11093037001) and standardized to protein concentration using Bradford reagent. E. coli wt+ cells are DHB4, which is the parent of FÅ113 (Origami™).
Figure 2, PfCHT1 chitinase activity assayed from crude lysates: Figure 2, PfCHT1 chitinase activity assayed from crude lysates:
Plasmodium falciparum chitinase (PfCHT1) with three cysteines were expressed from a plasmid under the regulation of T7 promoter. After induction, cells were harvested and crude cell lysates were prepared. PfCHT1 was assayed using a chromogenic substrate (CalBioChem #474550) and standardized to protein concentration using Brac3026 dford reagent.

Properties & Usage

Antibiotic for Plasmid Selection

Antibiotics for Plasmid Selection Working Concentration
Ampicillin 100 µg/ml
Carbenicillin 100 µg/ml
Kanamycin 30 µg/ml
Tetracycline 15 µg/ml

Shipping Notes

  • Ships on dry ice

Antibiotic Resistance

  • str (resistance to low levels of streptomycin may be observed)
  • nit
  • spec
  • cam


Companion Products
Notes
  • STORAGE AND HANDLING: Competent cells should be stored at -80°C. Storage at -20°C will result in a significant decrease in transformation efficiency. Cells lose efficiency whenever they are warmed above -80°C, even if they do not thaw.
References
  • Bessette, P.H. et al. (1999). Proc. Natl. Acad. Sci. USA. 96, 13703-13708.
  • Qiu, J., Swartz, J.R. and Georgiou, G. (1998). Appl. Environ. Microbiol. 64, 4891-4896.
  • Levy, R. et al. (2001). Protein Expr. Purif. 23, 338-347.
  • Chen, J. et al. (1999). J. Biol. Chem. 274, 19601-19605.
  • Boyd, D. et al. (2000). J. Bacteriol. 182, 842-847.
  • de Marco, A. (2009). Microbial Cell Factories. 8, 26.
Quality Control Assay
Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
Specifications
The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]
Certificate of Analysis
The Certificate of Analysis (COA) is a signed document that includes the storage temperature, expiration date and quality controls for an individual lot. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]_[Lot Number]
Safety Data Sheets
Legal And Disclaimer

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email busdev@neb.com.

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.The buyer and user have a non-exclusive sub-license to use this system or any component thereof for RESEARCH PURPOSES ONLY, based upon agreement to the following assurances.

Transfer of the host cells that contain the cloned copy of the T7 gene 1 to third parties is explicitly prohibited. This limitation applies to E. coli ER2566, ER2833, ER3011, ER3012, ER3013 and ER3021, SHuffle T7, SHuffle T7 LysY, SHuffle T7 Express, SHuffle T7 Express LysY and their competent derivatives, C2566, C2833, C3010, C3013, C3016, C3022, C3026, C3027, C3029 and C3030 when provided separately or when provided in combination with appropriate vectors for said systems.

A license to use this system or any components thereof for commercial purposes may be obtained from New England Biolabs, Inc.

Other Products You May Be Interested In
 Top