pTXB1 Vector

Features

• The NdeI site in the polylinker contains an ATG sequence for translation initiation. Unique sites are indicated in bold. SalI site is not unique.
• The SapI site should be used for cloning of the 3´ end of the insert. Use of the SapI site allows cloning of the target protein adjacent to the intein, resulting in cleavage of the target protein without any additional amino acids at its C-terminus.
• Expression of the fusion gene is under the control of an IPTG-inducible T7 promoter (6).
• A pBR322 derivative with a ColE1replication origin.
• Origin of DNA replication from bacteriophage M13, which allows for the production of single-stranded DNA by helper phage superinfection of cells bearing the plasmid (M13K07 helper phage, NEB #N0315).
• Ampicillin resistance.
• Other IMPACT vectors are available which allow for fusion of a target gene to N- or C- terminus of an intein. The cleavage reaction may be induced by thiol reagent or temperature/pH shift.
• Companion vector pTXB3 (NEB #N6708) contains an NcoI site in place of NdeI.
• A wide range of E. coli host strains: T7 Express Competent E. coli (High Efficiency) (NEB #C2566) or BL21(DE3) Competent E. coli (NEB #C2527) and derivatives.

Companion Products

• IMPACT™ Kit
• pTYB21 Vector
• pTWIN1 Vector

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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, 45-59.

• Intein-Mediated Protein Ligation IPL and Labeling with the IMPACT™ Kit

• IMPACT™ Vectors and Applications

• DNA Sequences and Maps Tool

1. What vectors are included in the IMPACT kit?
2. What is the DNA sequence of this product?

• Over 40 years in protein expression and purification – a historical perspective

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 & Change Notifications

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]

• N6707S_v1

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]

• N6707S_v1_10026441
• N6707S_v1_10035055
• N6707S_v1_10043572
• N6707S_v1_10060669
• N6707S_v1_10089195
• N6707S_v1_10115315
• N6707S_v1_10140933

The following is a list of Safety Data Sheet (SDS) that apply to this product to help you use it safely.

• pTXB1 Vector

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