title: Solution structure of At3g28950 from Arabidopsis thaliana.
abstract: We determined the solution structure of At3g28950 from A. thaliana, a homolog of At5g39720, whose structure we solved earlier. The secondary structure of the 165-aa protein consists of a 5-strand antiparallel beta-barrel domain flanked by two alpha-helices and a 2-strand beta-sheet; an additional free C-terminal alpha-helix extends into solution. Bioinformatic searches and analyses suggest that members of this growing set of structurally related proteins have been recruited to serve a wide variety of functions ranging from gamma-glutamyl cyclotransferase activity to participation in plant responses to chemical and biotic stimuli. Expression of a human homolog is elevated in bladder cancer tissues. Expression patterns for At3g28950 and its Arabidopsis paralogs suggest that each one evolved a different physiological role. The At3g28950 structure was solved as part of a structural genomics effort, and the results demonstrate how such a project can further understanding of genome evolution in addition to sequence-structure and structure-function relationships. Proteins 2008. (c) 2008 Wiley-Liss, Inc.
authors.affiliation: Department of Biochemistry and Center for Eukaryotic Structural Genomics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, USA.
authors.forename: Norberto B
authors.initials: NB
authors.lastname: de la Cruz
authors.forename: Francis C
authors.initials: FC
authors.lastname: Peterson
authors.forename: Brian F
authors.initials: BF
authors.lastname: Volkman
mesh_terms: D017360:Arabidopsis / Q000737:chemistry / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000096:biosynthesis / Q000737:chemistry*; D008958:Models, Molecular; D019906:Nuclear Magnetic Resonance, Biomolecular; D017433:Protein Structure, Secondary
chemical_list: D029681:Arabidopsis Proteins; C528485:At3g28950 protein, Arabidopsis