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New England Biolabs, Inc. Thermostable 5' App DNA/RNA Ligase – 50 reactions

Supplier: New England Biolabs, Inc. M0319L

Thermostable 5' App DNA/RNA Ligase is a point mutant of catalytic lysine of RNA ligase from Methanobacterium thermoautotrophicum. This enzyme is ATP independent. It requires a 5' pre-adenylated linker for ligation to the 3' -OH end of either RNA or single stranded DNA (ssDNA). The enzyme is also active in ligation of RNA with 2' -O-methylated 3 end to 5-adenylated linkers. The optimal temperature for ligation reaction is 60-65°C. The mutant ligase is unable to adenylate the 5' -phosphate of RNA or ssDNA, which reduces the formation of undesired ligation products (concatemers and circles). The ability of the ligase to function at 65°C might reduce the constraints of RNA secondary structure in RNA ligation experiments.
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