Abstract

The B subunit of DNA gyrase formed two-dimensional crystals when bound to a specifically recognized phospholipid spread into a monolayer at the air/water interface. The especially designed lipids consisted of novobiocin coupled through the 3' or 2″ hydroxyl group and a hydrophilous linker of a given length to dioleoylphosphatidic acid. Two-dimensional crystals of the gyrase B subunit are formed under physiological conditions of pH and ionic strength, with no precipitant added to the solution. Crystal diffraction extended to a 2.7 nm resolution in negative stain, with unit cell parameters a = 6.1 nm, b = 7.6 nm and γ = 64°.

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