ThiM [5-(hydroxyethyl)-4-methylthiazole kinase; EC 2.7.1.50] from Staphylococcus aureus is an essential enzyme of thiamine or vitamin B(1) metabolism and has been crystallized by the vapour-diffusion method. The crystals belonged to the primitive space group P1, with unit-cell parameters a = 62.06, b = 62.40, c = 107.82?Å, ? = 92.25, ? = 91.37, ? = 101.48° and six protomers in the unit cell, corresponding to a packing parameter V(M) of 2.3?Å(3)?Da(-1). Diffraction data were collected to 2.1?Å resolution using synchrotron radiation. The phase problem was solved by molecular replacement.
