Thermostable T7 RNA polymerase
Code No. TRL-201 7,500U.
Thermo T7 RNA polymerase is a genetically modified T7 RNA polymerase exhibiting increased thermal stability. The optimum reaction temperature of this enzyme is around 50ºC. The half-life of the enzyme at 50ºC is approximately 85 min.
E. coli strain that carries the cloned T7 RNA polymerase gene from T7 phage.
One unit is defined as the amount of enzyme that will incorporate 1 nmole of [3H] rNTP into an acid insoluble material using T7 DNA as template in 60 min at 37ºC.
20 mM KPO4 (pH 7.7), 100 mM NaCl, 0.1 mM EDTA, 5 mM DTT, 0.01% Triton X-100, 50% Glycerol. Store at -20ºC
Thermo T7 RNA polymerase (50U/µL)
10×Buffer
The residual activities of WT and Thermo T7 RNA polymerases were measured after incubation for various periods at 48ºC and 50ºC, respectively. As a result, Thermo T7 RNA polymerase retained its activity after incubation for 15 min whereas the activity of WT-enzyme decreased to 1/10 after incubation for 5 min.
The half-lives of the enzymes have been estimated to be:
WT T7 RNA polymerase: < 1.9 min.
Thermo T7 RNA polymerase: 84.5 min.
In vitro transcription activities were compared between WT and Thermo T7 RNA polymerases. Distinct transcripts were detected on an agarose gel from 37 to 51ºC with Thermo T7 RNA polymerase.