Exonuclease V (RecBCD)
- DNA specific exonuclease that also acts as an endonuclease on single-strand DNA
- Initiates at both 5' and 3' termini of linear double-stranded DNA
- Cleaves linear double-stranded DNA in both the 3' to 5' and 5' to 3' directions
- Requires ATP in the reaction
Exonuclease V is ideal for:
- Degradation of contaminating linear DNA in plasmid samples
- Removal of residual gDNA after purification of low copy plasmid
Exonuclease V, a RecBCD complex from E. coli has several different enzyme activities, including an ATP-dependent single-stranded DNA endonuclease activity, ss- and ds- DNA exonuclease activity. The hydrolysis in each case is bi-directional (from both the 3´ and 5´ ends) and processive, producing oligonucleotides (1,2,3). All Exonuclease V activities have divalent cation requirements. Mg2+ is required for the exonuclease activity, while Ca2+ inhibits the exonuclease activity and allows double-stranded DNA unwinding (helicase activity) without hydrolysis (4,5).
Product SourceAn E. coli strain containing plasmids for expressing the three subunits of E. coli Exonuclease V: RecB, RecC and RecD.
The following reagents are supplied with this product:
Store at (°C) Concentration NEBuffer™ 4 -20 10 X Adenosine 5'-Triphosphate (ATP) -20 10 mM
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