EcoRV

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Description:
EcoRV (pronounced "eco R five") is a type II restriction endonuclease isolated from certain strains of Escherichia coli. It has the alternative name Eco32I.

In molecular biology, it is a commonly used restriction enzyme. It creates blunt ends. The enzyme recognizes the palindromic 6-base DNA sequence 5'-GAT|ATC-3' and makes a cut at the vertical line. The complementary sequence is then 3'-CTA|TAG-5'. The ends are blunt and can be ligated into a blunt cloning site easily but with lower efficiency than sticky ends.

Structure

EcoRV has been cocrystallized with the sequence it normally cuts. This crystal was used to solve the structure of the complex.

The core of the enzyme consists of a five-stranded mixed β-sheet flanked by α-helices. The core is conserved in all other type II restriction endonucleases. It also has an N-terminal dimerization subdomain formed by a short α-helix, a two-stranded antiparallel -sheet, and a long α-helix. This subdomain is found only in EcoRV and PvuII.

Mode of action

Like EcoRI, EcoRV forms a homodimer in solution before binding and acting on its recognition sequence. EcoRV has a high specificity for its target DNA...
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