title: Crystals and a low resolution structure of interleukin-2.
abstract: Recombinant derived human interleukin-2 and an analog in which cysteine 125 has been replaced with alanine have been crystallized in a form suitable for x-ray diffraction. The crystals are triclinic, space group P1, with two protein molecules in the unit cell; unit cell parameters are a = 55.8 A, b = 40.1 A, c = 33.7 A, alpha = 90.0 degrees, beta = 109.3 degrees, gamma = 93.2 degrees. The interleukin-2 structure has been solved to 5.5 A resolution using heavy atom isomorphous replacement methods. The resultant low resolution model reveals a significant fraction of alpha helical secondary structure and outlines the overall tertiary structure of the molecule.
mesh_terms: D003460:Crystallization; D006801:Humans; D007376:Interleukin-2; D008433:Mathematics; D008961:Models, Structural; D011994:Recombinant Proteins; D014961:X-Ray Diffraction
chemical_list: D007376:Interleukin-2; D011994:Recombinant Proteins