PowerCut™ Dicer

Enzyme for producing siRNA molecules from dsRNA with 100 % efficiency!

Description

Finnzymes’ novel PowerCut™ Dicer produces a pool of 25–27 nucleotide-long siRNA molecules from any dsRNA. This efficient endoribonuclease originating from Giardia intestinalis outperforms all other siRNA producing enzymes by cleaving the substrate with 100 % efficiency yet leaving the resulting siRNA intact. The high quality siRNA produced is ideal for gene silencing studies, for example. Pooled siRNAs are also preferred over synthetic siRNA oligos if the target sequence cannot be specified well enough or when the sequence is prone to variations like in the case of viral targets.

PowerCut Dicer combined with Finnzymes’ Replicator™ RNAi Kit is a powerful combination for generating high amounts of siRNA from in vitro -produced dsRNA.

Advantages

• 100 % cleavage efficiency gives maximal siRNA yields
• No overdigestion of siRNAs
• Produces siRNAs of 25–27 nucleotide-long siRNAs with a strong silencing function
• Free of contaminating RNase, endo- and exonuclease activities

siRNAs with 100 % efficiency without overdigestion

Three different dsRNA substrates (Furin, eGFP and Phi6 dsRNA) were cleaved using Finnzymes’ PowerCut Dicer and two other commercial enzymes used for producing siRNAs (from major suppliers). Reactions were performed according to the manufacturers’ instructions. PowerCut Dicer cleaved all the three substrates with 100 % efficiency. The conventional dicer gave only partial digestion, whereas RNase III also digested part of the produced siRNAs resulting in lower yield. M denotes a 27-bp RNA marker.

Efficient silencing in HeLa cells

The HeLa-eGFP cell line containing constitutively expressed pEGFP-C1 plasmid was transfected with non-specific control siRNAs (Phi6 S) and specific eGFP siRNAs produced with Finnzymes’ PowerCut Dicer. The results show that specific siRNAs efficiently silence the expression of eGFP, whereas the non-specific control siRNA has no effect. The eGFP siRNAs were cleaved from a dsRNA substrate produced with Finnzymes’ Replicator RNAi Kit.

Control (non-specific siRNA, 10 nM)	Specific eGFP siRNA, 1 nM	Specific eGFP siRNA, 10 nM

Contents

PowerCut Dicer is supplied with 5x PowerCut Dicer Reaction Buffer.

Storage buffer

50 mM Tris-HCl pH 8 (25°C), 50 mM NaCl, 5 mM MgCl₂, 0.2 mg/ml BSA, 50 % glycerol.

Storage

Recommended storage temperature -20 °C.

Ordering information

PowerCut™Dicer
F-602S	60 U (1 U / µl)
F-602L	300 U (1 U / µl)