Product Description
        Recombinant TEV Protease with His tag (rTEV-H) is a highly purified preparation of the catalytic domain of the small nuclear inclusion a (NIa) protein encoded by the tobacco etch virus (TEV). The biological function of the protease is to proteolyse the viral polyprotein into single proteins during tobacco etch virus biogenesis. Its sequence specificity is far more stringent than that of factor Xa, thrombin. TEV protease is a very useful tool enzyme for the downstream fusion proteins cleavage which recognizes a heptapeptide consensus sequence of the general form E-Xaa-Xaa-Y -Xaa-Q-P1’(G/S), with cleavage occurring between Q and P1’. The most commonly used sequence is ENLYFQG. Many different small amino acids are tolerated in the P1’ position, allowing target genes to be released from N-terminal fusions with either a native N-terminus or with only a single amino acid substitution. It has optimally engineered and purified for enhanced stability and high specific activity over a broad temperature range. The enzyme is produced in recombinant E.coli and purified to high homogeneity with specificity of 20,000U/mg. The optimal temperature for cleavage is 30℃, however, the enzyme can be used at temperatures as low as 4℃. The rTEV-H contains His tag. The rTEV is purified by proprietary chromatographic techniques and can be removed from protein preparation by Ni-affinity chromatorgraphy. The cleavage condition should be optimized, such as tempterature, pH and DTT. 
Purity
        More than 95% by SDS-PAGE analysis.
Activity
        One unit is defined as the amount of enzyme that will cleave 95% of 5μg fusion protein in 12~16 hours at 4℃in 1x reaction buffer.
Recommended Enzyme Disgestion Conditions
        Fusion protein                               0.1mg
        Recombinant TEV protease             20U
        10xbuffer                                           10μl
        Temperature（℃）                              4
        Total volume                                   100μl
        Time（hour）                               12~16
10x Reaction Buffer
        500 mM Tris-HCl, pH 8.0
        5 mM EDTA
        1% Tween-20 (v/v)
        10 mM DTT
Stability
        Stable at -20℃ for up to two years since reported data.
Reference
        Kapust RB, Tözsér J, Copeland TD, Waugh DS. The P1' specificity of tobacco etch virus protease, Biochem Biophys Res Commun. 2002 Jun 28;294(5):949-55.