rTth DNA Polymerase
DNA polymerase having reverse transcripcase activity
Tth DNA polymerase is a thermostable DNA polymerase derived from the thermophilic bacteria Thermus thermophilus (Tth) HB8.
The enzyme has a reverse transcriptase activity in addition to a 5’→3’ polymerase activity and a double strand specific 5’→ 3’ exonuclease activity in the presence of Mn2+ ions. Therefore, this enzyme enables "one-step RT-PCR" including the reverse transcription and PCR steps.
Features
- Exhibits reverse transcriptase activity in the presence of Mn2+ ions.
- Effective for the amplification of GC-rich targets and crude samples.
- Effective for reverse transcription of RNA with complicated secondary structure due to the reaction occurring at high temperature (i.e., 60ºC).
Contents/ PCR set-up
Contents
This reagent includes the following components for 100-200 reactions;
- rTth DNA Polymerase (5U/µL)
- 10 x Buffer (Mg buffer)
- Dilution buffer
- 2mM dNTPs
Formulation: 10 mM Tris-HCl (pH 7.5), 300 mM KCl, 0.1 mM EDTA, 1 mM DTT, 1% Tween™ 20, 500 µg/mL BSA, 50% Glycerol.
Unit Definition: One unit is defined as the amount of enzyme that will incorporate 10 nmoles of dNTP into an acid insoluble material in 30 min at 75ºC.
PCR Reaction Set-up
| Component | Volume | Final Concentration |
|---|---|---|
| 10x Buffer | 5 mL/td> | 1× |
| 2mM dNTPs | 5 mL | 0.2 mM each |
| 10 pmol/ul Primer #1 | 1.0 mL | 0.2 mM |
| 10 pmol/ul Primer #2 | 1.0 mL | 0.2 mM |
| Template DNA | X mL | Genomic DNA 10~1000 ng/50 µL Plasmid DNA 1~50 ng/50 µL cDNA ~200 ng (RNA equiv.)/50 µL |
| PCR grade water | Y mL | |
|
Diluted rTth DNA polymerase(1.0U/µL) |
1.25-2.5 mL | 1.25-2.5 U / 50 µL |
| Total reaction volume | 50 mL |
PCR Cycle Condition
*Extension time should be set at 1 min per 1 kb of target length
Application Data
1) Amplification of 180 bp–1.3 kb genes from human genomic DNA
Distinct and specific amplified bands from 180 bp to 1.3 kb were observed with rTth DNA polymerase by 1% agarose gel electrophoresis.
2) Amplification of the yeast actin and human 18s rRNA by RT-PCR
The single-enzyme RT-PCR with rTth DNA polymerase gave distinct amplification bands, whereas RT-PCR with M-MLV reverse transcriptase and rTaq DNA polymerase gave very faint bands.
Reference
-
Myers TW, Gelfand DH. Reverse transcription and DNA amplification by a Thermus thermophilus DNA polymerase. Biochemistry. 1991;30:7661-7666. DOI: 10.1021/bi00245a001.
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Yamada K, Terashima M, Shimoyama M, Tsuchiya M. Arginine-specific ADP-ribosyltransferase on the surface of gizzard smooth muscle cells and the involvement of phosphatidylinositol 3-kinase in maintaining the activity of this transferase. J Biochem. 2001;130:335-340. DOI: 10.1093/oxfordjournals.jbchem.a002991.
Ordering Information
| Product | Storage | Cat.No. | PKG Size | Price | |
|---|---|---|---|---|---|
| rTth DNA Polymerase (250U) | -20℃ | TTH-301 | 100~200 Reactions | 147.00 | Buy |