title: Crystal structure of interleukin 10 reveals an interferon gamma-like fold.
abstract: The crystal structure of recombinant human interleukin 10 (rhIL-10) has been determined by X-ray crystallography at 2.0 A resolution. Interleukin 10 is a dimer composed of identical polypeptide chains related by a 2-fold axis. The molecule is predominantly alpha-helical. The main-chain fold resembles that of interferon gamma (IFN-gamma) in which the structural integrity of each domain is dependent on the intertwining of helices from each peptide chain. Comparison of rhIL-10 and IFN-gamma reveals differences in helix lengths and orientations of the 2-fold related domains. Interleukin 10 and IFN-gamma contain several conserved residues in their internal cores which suggest a possible "fingerprint" for detection of other members of this fold.
authors.affiliation: Department of Pharmacology, University of Alabama at Birmingham 35294, USA.
authors.forename: M R
authors.initials: MR
authors.lastname: Walter
authors.forename: T L
authors.initials: TL
authors.lastname: Nagabhushan
mesh_terms: D000595:Amino Acid Sequence; D017124:Conserved Sequence; D018360:Crystallography, X-Ray; D006801:Humans; D007371:Interferon-gamma / Q000737:chemistry; D016753:Interleukin-10 / Q000737:chemistry*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D011487:Protein Conformation; D018123:Receptors, Interleukin; D053701:Receptors, Interleukin-10; D011994:Recombinant Proteins / Q000737:chemistry; D017386:Sequence Homology, Amino Acid
chemical_list: D018123:Receptors, Interleukin; D053701:Receptors, Interleukin-10; D011994:Recombinant Proteins; D016753:Interleukin-10; D007371:Interferon-gamma