Ribonuclease T2, Recombinant Aspergillus oryzae, Animal Origin Free

I.U.B.: 3.1.27.1

C.A.S.: 37278-25-4

Aspergillus oryzae Ribonuclease T₂ is a member of the RNase T₂ family of endonucleases that are present in a wide variety of microbial, plant and animal species. In contrast to Aspergillus oryzae Ribonuclease T₁, which is an exclusively guanylic-acid specific endonuclease, all RNase T₂-like enzymes are essentially base non-specific. However, RNase T₂ endonucleases from different species can show slight base preferences. The fungal enzymes, including Aspargillus oryzae RNaseT2, show slight base preference in the following order: A>G>C, U. RNase T2 cleaves between the 3’-phosphate residue of one base and the 5’-OH residue of the adjacent nucleotide forming a 2’, 3’-cyclic phosphate intermediate followed by the generation of oligonucleotides with 3’-phosphate residues. RNase T₂ has a molecular weight of 36 kDa and 12-15% of its mass is composed of carbohydrate. 

Optimal pH:

4.5

Isoelectric Point:

5.0 

Activators:

• EDTA will stimulate activity, especially in the presence of divalent cations.

Inhibitors:

• Strongly inhibited by Cu²⁺, Zn²⁺ and Hg²⁺
• Ca²⁺, Mg²⁺ and heparin (to a lesser degree)
• Mononucleotides and RNase T₂ digestion products (competitively)  

Applications: 

• 3’ analysis of RNA and RNase protection assays