title: Crystallization and preliminary X-ray studies of thymus and activation-regulated chemokine (TARC).
abstract: Thymus and activation-regulated chemokine (TARC) is a CC chemokine that is most highly expressed in the thymus. TARC interacts primarily with the CCR4 receptor and to a lesser extent with the CCR8 receptor. Three different crystal forms of synthetically prepared TARC were grown in triclinic, hexagonal and tetragonal systems. The X-ray data for the triclinic crystals (unit-cell parameters a = 56.46, b = 76.48, c = 88.37 A, alpha = 85.8, beta = 72.8, gamma = 70.0 degrees ) extend to 1.85 A on a conventional radiation source. The hexagonal crystals diffracted to 2.2 A at a synchrotron-radiation source and belong to either space group P6(1)22 or P6(5)22, with unit-cell parameters a = 61.8, c = 315. A. The tetragonal crystals diffracted to about 5 A at a synchrotron-radiation source and had approximate unit-cell parameters a = b = 47.7, c = 58.2 A.
authors.affiliation: Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, Frederick, MD 21702, USA.
authors.forename: Oluwatoyin A
authors.initials: OA
authors.lastname: Asojo
authors.forename: Simon
authors.initials: S
authors.lastname: Cater
authors.forename: David M
authors.initials: DM
authors.lastname: Hoover
authors.forename: C
authors.initials: C
authors.lastname: Boulègue
authors.forename: Wuyuan
authors.initials: W
authors.lastname: Lu
authors.forename: Jacek
authors.initials: J
authors.lastname: Lubkowski
mesh_terms: D054414:Chemokine CCL17; D019742:Chemokines, CC / Q000737:chemistry*; D003460:Crystallization; D018360:Crystallography, X-Ray; D008027:Light; D012542:Scattering, Radiation
chemical_list: C106230:CCL17 protein, human; D054414:Chemokine CCL17; D019742:Chemokines, CC