title: Expression, purification and crystallization of recombinant human TRAIL.
abstract: TRAIL (also known as Apo-2L) belongs to the tumour necrosis factor (TNF) cytokine family and induces rapid apoptosis in a wide variety of tumour cell lines upon binding to the death-signalling receptors on the cell membrane. Normal cells are resistant to TRAIL, owing to the expression of decoy receptors which lack functional death domains and antagonize TRAIL-induced apoptosis. Soluble and functional human TRAIL, expressed in Escherichia coli and refolded into a functional form, has been crystallized. The crystals belong to space group P63 with unit-cell dimensions a = b = 65.61, c = 131. 70 A. The asymmetric unit contains two molecules of TRAIL, with a crystal volume per protein mass (Vm) of 2.41 A3 Da-1 and a solvent content of about 42% by volume. A native and a platinum-derivative data set to 2.8 and 3.5 A resolution, respectively, were obtained from frozen crystals. Structure determination by a combined molecular replacement and isomorphous replacement method is in progress.
authors.affiliation: Department of Life Science and School of Environmental Engineering, Pohang University of Science and Technology, Pohang, Kyungbuk 790-784, South Korea.
authors.forename: S S
authors.initials: SS
authors.lastname: Cha
authors.forename: H C
authors.initials: HC
authors.lastname: Shin
authors.forename: K Y
authors.initials: KY
authors.lastname: Choi
authors.forename: B H
authors.initials: BH
authors.lastname: Oh
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D051017:Apoptosis Regulatory Proteins; D002460:Cell Line; D003460:Crystallization; D018360:Crystallography, X-Ray; D006801:Humans; D008562:Membrane Glycoproteins / Q000096:biosynthesis* / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D051379:Mice; D008958:Models, Molecular; D011487:Protein Conformation; D011994:Recombinant Proteins / Q000096:biosynthesis* / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification; D053221:TNF-Related Apoptosis-Inducing Ligand; D014409:Tumor Necrosis Factor-alpha / Q000096:biosynthesis* / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D051017:Apoptosis Regulatory Proteins; D008562:Membrane Glycoproteins; D011994:Recombinant Proteins; D053221:TNF-Related Apoptosis-Inducing Ligand; C505653:TNFSF10 protein, human; C505654:Tnfsf10 protein, mouse; D014409:Tumor Necrosis Factor-alpha