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Kertesz-Farkas A., Nikitin D. Gene. 2018. Vol. 660. P. 8-12.

ype II restriction endonucleases and modification DNA-methyltransferases are key instruments of genetic engineering. Recently the number of proteins assigned to this group exceeds 8500. Subtype IIC organizes bifunctional endonuclease-methyltransferase enzymes and currently consists of 16 described members. Here we present phylogenetic tree of 22 new potential bifunctional endonucleases. The majority of them are thought to be fusions of a restriction nuclease with a DNA-methyltransferase and a target recognition subunit of type I restriction-modification systems (R-M-S structure). A RM.AloI isoschizomer from Prevotella copri DSM-18205, PcoI, has been cloned, purified and its REase activity demonstrated. It cuts DNA in magnesium-dependent manner and demonstrates high affinity to DNA, which probably reflects its mechanism of action. This work provides additional proves that gene fusion might play …

Added: Oct 10, 2018