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High temperature cDNA synthesis by AMV reverse transcriptase improves the specificity of PCR
Molecular Biotechnology
|January 13, 2000
Summary
Avian myeloblastosis virus reverse transcriptase (AMV-RT) can synthesize cDNA at 70°C, improving polymerase chain reaction (PCR) specificity. This thermophilic property in a mesophilic enzyme prompts evolutionary questions.
Area of Science:
- Molecular Biology
- Enzymology
- Biochemistry
Background:
- Avian myeloblastosis virus reverse transcriptase (AMV-RT) is crucial for cDNA synthesis.
- Standard AMV-RT reactions occur between 37°C and 42°C.
Purpose of the Study:
- To investigate the thermal stability and activity of AMV-RT at elevated temperatures.
- To explore the application of high-temperature AMV-RT activity in improving polymerase chain reaction (PCR) specificity.
Main Methods:
- Enzymatic activity assays of AMV-RT at temperatures up to 70°C.
- Application of high-temperature AMV-RT in PCR to assess specificity improvements.
Main Results:
- AMV-RT demonstrates significant cDNA synthesis activity at temperatures as high as 70°C.
- Utilizing high-temperature AMV-RT in PCR enhances reaction specificity.
Conclusions:
- AMV-RT exhibits unexpected thermophilic properties, functioning effectively at higher temperatures than typically used.
- The thermophilic nature of AMV-RT in a mesophilic enzyme presents evolutionary insights into enzyme structure and function.