Expression, purification, crystallization and crystallographic study of the Aspergillus terreus aromatic prenyltransferase AtaPT.

ABSTRACT

Prenylated aromatics are produced by aromatic prenyltransferases during the secondary metabolism of bacteria, fungi and plants. The prenylation of nonprenylated precursors can lead to great chemical diversity and extensive biological properties. Aspergillus terreus aromatic prenyltransferase (AtaPT), which has recently been discovered and characterized, is such an enzyme and is responsible for the prenylation of various aromatic compounds. Here, recombinant AtaPT was overexpressed in Escherichia coli, purified and crystallized. Diffraction data were collected to a resolution of 1.71 Šand the crystal belonged to space group P2(1)2(1)2, with unit-cell parameters a = 96.2, b = 135.8, c = 69.5 Å, α = ß = γ = 90°. Analysis of the calculated Matthews coefficient and the self-rotation function suggested that there are two AtaPT molecules in the asymmetric unit.