Shrimp Alkaline Phosphatase (rSAP) is a heat labile alkaline phosphatase purified from a recombinant source. rSAP is identical to the native enzyme and contains no affinity tags or other modifications. rSAP nonspecifically catalyzes the dephosphorylation of 5´ and 3´ ends of DNA and RNA phosphomonoesters. Also, rSAP hydrolyses ribo-, as well as deoxyribonucleoside triphosphates (NTPs and dNTPs). rSAP is useful in many molecular biology applications such as the removal of phosphorylated ends of DNA and RNA for subsequent use in cloning or end-labeling of probes. In cloning, dephosphorylation prevents religation of linearized plasmid DNA. The enzyme acts on 5´ protruding, 5´ recessed and blunt ends. rSAP may also be used to degrade unincorporated dNTPs in PCR reactions to prepare templates for DNA sequencing or SNP analysis. rSAP is completely and irreversibly inactivated by heating at 65°C for 5 minutes, thereby making removal of rSAP prior to ligation or end-labeling unnecessary.
Figure 1: rSAP heat inactivation at 65°C
1 unit of rSAP was incubated under recommended reaction conditions, including DNA, for 30 minutes and then heated at 65°C. Remaining phosphatase activity was measured by PNPP assay.
Product Source
A Pichia pastoris clone that carries the shrimp alkaline phosphatase gene from Northern shrimp Pandalus borealis (1,2).- This product is related to the following categories:
- Phosphatases Products,
- RNA Modification Products
- This product can be used in the following applications:
- Dephosphorylation,
- RNA Modification,
- In vitro Transcription for RNA Synthesis
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