Crystallization and X-ray crystallographic analysis of human STAT1

Unphosphorylated human STAT1 (1–683) has been crystallized in the presence of a phosphopeptide derived from the α-chain of human interferon γ (IFNγ) receptor. A complete data set has been collected from a KAu(CN)₂-derivatized and dehydrated crystal. The crystal belonged to space group P6₁22, with unit-cell parameters a = b = 102.6, c = 646.5 Å, α = β = 90, γ = 120°.