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pTWIN1 Vector

Catalog # Concentration Size List Price Quantity Your Price
N6951S 200 µg/ml 10 µg $222.00
$199.80
Catalog # Size List Price Your Price
N6951S 10 µg $222.00
$199.80
Catalog #
Qty:
 
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at www.neb.ca

pTWIN1 is an E. coli expression vector designed for protein purification or for the isolation of proteins with an N-terminal cysteine and/or a C-terminal thioester. A polylinker in the vector is designed for the in-frame fusion of a target gene between the modified Ssp DnaB and Mxe GyrA inteins. The presence of the chitin binding domain from Bacillus circulans facilitates purification.

  • View sequence details
  • Can be used with the IMPACT™ Protein Purification System
  • Double-stranded vector
  • 7,375 base pairs in length
  • Ampicillin resistant

pTWIN1 is an E. coli expression vector which can be used with the IMPACT™ Kit (NEB #E6901). pTWIN vectors are designed for protein purification or for the isolation of proteins with an N-terminal cysteine and/or a C-terminal thioester (1). A polylinker in the vector is designed for the in-frame fusion of a target gene between the modified Ssp DnaB (2) and Mxe GyrA inteins (3,4). The presence of the chitin binding domain from Bacillus circulans (5,6) facilitates purification. The double-stranded vector is 7,375 base pairs in length.

DNASU is a central repository for plasmid clones and collections that may also be helpful.

Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  pTWIN1 Vector N6951SVIAL -20 1 x 0.05 ml 200 µg/ml
Features
  • A pBR322 derivative 
  • The SapI sites should be used for directional cloning of both the 5´ and 3´ ends of an insert
  • Expression of the fusion gene is under the control of the T7 promotor (8) and is regulated by IPTG due to the presence of a lacI gene
  • Expression requires an E. coli host that carries the T7 RNA Polymerase gene [e.g., T7 Express Competent E. coli (High Efficiency) (NEB #C2566) or BL21(DE3) Competent E. coli (NEB #C2527) and derivatives] (9)
  • Origin of DNA replication from the bacteriophage M13 allows for the production of single-stranded DNA by helper phage superinfection of cells bearing the plasmid
  • Thiol-induced cleavage of the Mxe GyrA intein is dependent on the amino acids adjacent to the intein. The amino acid residues M or Y at the C-terminus of the target protein is recommended for use with this intein
  • Controllable cleavage of the Ssp DnaB intein is dependent on the amino acids adjacent to the intein. The amino acid residues CRA or GRA at the N-terminus of the target protein is recommended for use with this intein
  • Ampicillin resistance


Companion Products
Notes
  • Cell Lysis Buffer: 50 mM Tris-HCl (pH 8.5) containing 500 mM NaCl.
    Ssp DnaB Intein Cleavage Buffer: 50 mM Tris-HCl (pH 6.0) containing 500 mM NaCl.
    Mxe GyrA Intein Cleavage Buffer: 50 mM Tris-HCl (pH 8.5) containing 500 mM NaCl and 50 mM 2-mercaptoethanesulfonic acid.
References
  • Evans, T.C., Benner, J. and Xu, M.-Q. (1999). The cyclization and polymerization of bacterially expressed proteins usingmodified self-splicing inteins. J. Biol. Chem.. 274, 18359-18363.
  • Mathys, S., Evans, T.C., Chute, I.C., Wu, H., Chong, S., Benner, J., Liu, X.-Q. and Xu, M.-Q. (1999). Characterization of a self-splicing mini-intein and its conversion intoautocatalytic N- and C-terminal cleavage elements: facile production of proteinbuilding blocks for protein ligation. Gene. 231, 1-13.
  • Evans, T.C., Benner, J. and Xu, M.-Q. (1998). Semisynthesis of cytotoxic proteins using a modified protein splicing element. Protein Sci.. 7, 2256-2264.
  • Southworth, M.W., Amaya, K., Evans, J., T.C., Xu, M.-Q. and Perler, F.B. (1999). Purification of proteins fused to either the amino or carboxy terminus of the Mycobacterium xenopi gyrase A intein.. BioTechniques. 27, 110-120.
  • Chong, S., Mersha, F.B., Comb, D.G., Scott, M.E., Landry, D., Vence, L.M., Perler, F.B., Benner, J., Kucera, R.B., Hirvonen, C.A., Pelletier, J.J., Paulus, H. and Xu, M.-Q. (1997). Single-column purification of free recombinant proteins using a self-cleavableaffinity tag derived from a protein splicing element. Gene. 192, 271-281.
  • Watanabe, T., Ito, Y., Yamada, T., Hashimoto, M., Sekine, S. and Tanaka, H. (1994). The role of the C-terminal domain and type III domains of chitinase A1 from Bacillus circulans WL-12 in chitin degradation. J. Bacteriol.. 176, 4465-4472.
  • Wu, H., Xu, M.-Q. and Liu, X.-Q. (1998). Protein trans-splicing and functional mini-inteins of a cyanobacterial DnaB intein. Biochem. Biophys. Acta. 1387, 422-432.
  • Telenti, A., Southworth, M., Alcaide, F., Daugelat, S., Jacobs, W.R. Jr. and Perler, F.B. (1997). The Mycobacterium xenopi GyrA protein splicing element: Characterization of a minimal intein. J. Bacteriol.. 179, 6378-6382.
  • Dubendorff, J.W. and Studier, F.W. (1991). Controlling basal expression in an inducible T7 expression system by blocking the target T7 promoter with lac repressor. J. Mol. Biol.. 219, J. Mol. Biol..
Quality Control Assay
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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
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U.S. Patent Nos: US 7001745 and US 7,271,256

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