TEV Protease (TurboTEV)
TurboTEV Protease contains an enhanced form of a catalytic fragment of the N1a protein of Tobacco etch virus (TEV), a cysteine protease that recognizes the cleavage site of Glu-Asn-Leu-Tyr-Phe-Gln-Gly/Ser and cleaves between Gln and Gly/Ser. TurboTEV Protease is a restriction grade protease that has a robust activity at 4°C with high specificity and great stability. It does not require any special buffer for its activity and can be used in a buffer most suitable for the target protein. TurboTEV Protease is a 52 kDa protein with both GST and His tags so it can be easily removed by either Ni-chelating or Glutathione (GSH) resin along with the cleaved tag.
- Affordable ultra-pure TEV Protease
- Activity over a broad temperature (4°C to 37°C) and pH (6.5 to 8.5) range
- Both GST and His tags to facilitate its removal from the digested protein sample
Formulation and Storage
2 mg/ml in 25 mM Tris-HCl, pH 8.0, 50 mM NaCl, 1 mM TCEP, and 50% glycerol. Store at -20°C. Shipped in gel packs
Activity and Specificity
TurboTEV Protease has a specific activity of 10,000 units/mg, using the conventionally defined activity unit (One unit cleaves >85% of 3 µg control substrate in 1 h at 30°C). In practice, 1 mg (10,000 units) of TurboTEV Protease cleaves >90% of 100 mg of a target fusion protein at 4°C in 16 hours. No non-specific cleavage has been observed under the same condition when TurboTEV Protease and target fusion protein was mixed at 1:10 ratio. TurboTEV Protease retains >80% activity after storage at room temperature for over 65 hours.
A 49 kDa GST-fusion protein (C) at 1 mg/ml is incubated with TurboTEV or TEV Protease at a ratio of (1) 1:50, (2) 1:100, (3) 1:200 (w/w) in a buffer of 25 mM Tris-HCl, pH 8.0, 150 mM NaCl, 14 mM 2-mercaptoethanol at 4°C for 16 hours. The cleaved products are 27 kDa and 22 kDa. TEV is a competitor TEV product
Purified from E. coli expressing the TurboTEV protease gene.
It is recommended to test TurboTEV Protease cleavage with a protease-to-target protein ratio of 1:100 (w/w) or 1 unit of TurboTEV to 10 ug of target protein in a buffer suitable for the target protein at 4°C overnight, with the target protein concentration at 1-2 mg/ml. In most cases, >90% of target protein is cleaved with a TurboTEV-to-target protein ratio of 1:50 to 1:200 or 1 unit TurboTEV to 5-20 ug of target protein (as shown in Figure 1). The efficiency of cleavage may vary due to the sequences around the cleavage site, the conformation and the solubility of the target protein. Due to its high specificity, more TurboTEV Protease (at 1:10 ratio) or longer cleavage time (over a weekend) at higher temperature (37°C) can be used to achieve high cleavage efficiency without non-specific cleavage of target proteins.
Removal of TurboTEV Protease after Cleavage
TurboTEV Protease contains both GST and His tags. After cleavage of the target protein, TurboTEV Protease is easily removed along with the tags from the cleavage reaction by affinity chromatography using Ni-chelating resin for His-tagged target protein or GSH resin for GST-tagged target protein
|Product Name||Storage||Product No.||PKG Size||Price|
|TurboTEV (TEV Protease) 2 mg/ml||F||NU0102S||1,000 units (0.1 mg)|
|TurboTEV (TEV Protease) 2 mg/ml||F||NU0102M||10,000 units (1 mg)|
|TurboTEV (TEV Protease) 2 mg/ml||F||NU0102L||100,000 units (10 mg)|
(Storage) F: Freeze