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Thermolabile Proteinase K is an engineered, subtilisin-related serine protease that will hydrolyze a variety of peptide bonds. It preferentially cleaves the peptide bond at the carboxyl side of aliphatic or aromatic amino acid residues. However; the specificity of Thermolabile Proteinase K can be broad.Thermolabile Proteinase K (TLPK) can be completely inactivated by incubation at 55°C for 10 minutes, which allows for subsequent enzymatic steps in the same reaction vessel. Figure 1 shows that the activity of restriction endonucleases, including heat-stable endonucleases, can be completely abolished using TLPK.
Figure 1:Thermolabile Proteinase K completely degrades restriction enzyme activityLane L: 1 kb DNA Ladder (NEB #N3232); Lane 1: λ DNA incubated for 1 hour at 37°C; Lane 2: λ DNA incubated with PvuII-HF or PstI-HF for 1 hour at 37°C; Lane 3: λ DNA incubated with PvuII-HF or PstI-HF which had been treated with 1 μL Thermolabile Proteinase K (TLPK) for 10 minutes at 37 °C; Lane 4: λ DNA incubated first with TLPK treated PvuII-HF or PstI-HF followed by incubation at 55 °C for 10 minutes to inactivate the TLPK, followed by treatment with PvuII-HF or PstI-HF for 1 hour at 37°C. Results indicate that Thermolabile Proteinase K completely degrades restriction enzyme activity, allowing for subsequent enzymatic steps in the same reaction vessel.
Product Source
Cloned fromEngyodontium album (formerly Tritirachium album), mutagenized to increase thermolability of the enzyme and expressed inK. lactis.
This product is related to the following categories:
Proteases Products,
Total RNA Extraction & Purification Products,
Nucleic Acid Purification Products
This product can be used in the following applications:
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