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crystallization communications
Flap endonuclease 1 (FEN1) is a structure-specific nuclease that removes the RNA/DNA primer associated with Okazaki fragments in DNA replication. Here, crystals of the complex between the catalytic domain of human FEN1 and a DNA product have been obtained. For efficient crystallization screening, a DNA–protein complex crystallization screening (DPCS) kit was designed based on commercial crystallization kits. The crystal was found to belong to space group P21, with unit-cell parameters a = 61.0, b = 101.3, c = 106.4 Å, β = 106.4°. The asymmetric unit is predicted to contain two complexes in the crystallographic asymmetric unit. A diffraction data set was collected to a resolution of 2.75 Å.