Structural highlights
Publication Abstract from PubMedThe graTA operon from Pseudomonas putida encodes a toxin-antitoxin module with an unusually moderate toxin. Here, the production, SAXS analysis and crystallization of the antitoxin GraA, the GraTA complex and the complex of GraA with a 33 bp operator fragment are reported. GraA forms a homodimer in solution and crystallizes in space group P21, with unit-cell parameters a = 66.9, b = 48.9, c = 62.7 A, beta = 92.6 degrees . The crystals are likely to contain two GraA dimers in the asymmetric unit and diffract to 1.9 A resolution. The GraTA complex forms a heterotetramer in solution. Crystals of the GraTA complex diffracted to 2.2 A resolution and are most likely to contain a single heterotetrameric GraTA complex in the asymmetric unit. They belong to space group P41 or P43, with unit-cell parameters a = b = 56.0, c = 128.2 A. The GraA-operator complex consists of a 33 bp operator region that binds two GraA dimers. It crystallizes in space group P31 or P32, with unit-cell parameters a = b = 105.6, c = 149.9 A. These crystals diffract to 3.8 A resolution. Production, biophysical characterization and crystallization of Pseudomonas putida GraA and its complexes with GraT and the graTA operator.,Talavera A, Tamman H, Ainelo A, Hadaei S, Garcia-Pino A, Horak R, Konijnenberg A, Loris R Acta Crystallogr F Struct Biol Commun. 2017 Aug 1;73(Pt 8):455-462. doi:, 10.1107/S2053230X17009438. Epub 2017 Jul 26. PMID:28777088[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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