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The following articles are a selection of those recently accepted for publication in IUCrJ.
See also Forthcoming articles in all IUCr journals.
research papersCoherent crystal branches: the impact of tetragonal symmetry on the 2D confined polymer nanostructure
The impact of tetragonal crystal symmetry on the two-dimensional (2D) confined polymer nanostructure is demonstrated. Our research shows that this chain packing defect in the tetragonal cell can be controlled to develop along the rod long axis in 2D confinement.
research papersStructural and functional analysis of the Klebsiella pneumoniae MazEF toxin-antitoxin system
We present the first crystal structure of a type II TA complex structure of K. pneumoniae at 2.3 Å resolution. Mutational experiments and cell growth assays confirm R28 and T51 as critical residues for MazF ribonuclease activity.
research papersWhole pair distribution function modeling: the bridging of Bragg and Debye scattering theories
The whole pair distribution function modeling method is introduced to overcome the distinction between Bragg and Debye theories in analysis of powder-scattering data. Models based on Bragg's law are used to facilitate the computation of a whole pair distribution function followed by the solution of the Debye scattering equation.
research papersStructures of the germline-specific Deadhead and thioredoxin T proteins from Drosophila melanogaster reveal unique features among thioredoxins
The first structures of the Drosophila germline-specific thioredoxins Deadhead (Dhd) and thioredoxin T (TrxT), which present unusual properties with respect to canonical Trxs, are reported. Dhd is highly positively charged, which facilitates nonspecific DNA binding to promote chromatin remodeling. TrxT contains a C-terminal extension, which is mostly unstructured and highly flexible, that modulates the redox activity of the protein. These structures will facilitate the virtual screening of small-molecule ligands and protein partners.
research papersNitrosonium nitrate (NO+NO3−) structure solution using in situ single-crystal X-ray diffraction in a diamond anvil cell
The crystal structure of nitrosonium nitrate (NO+NO3−) is determined by synchrotron single-crystal X-ray diffraction at pressures of 7.0 and 37.0 GPa – resolving a long-standing controversy. Remarkably, the oxygen atom of the NO+ unit is determined to be positively charged, a rare occurrence when in the presence of a less-electronegative element.
research lettersThe use of additives to regulate solute aggregation and direct conformational polymorph nucleation of pimelic acid
The interference of solute self-assembly caused by the interactions between pimelic acid and a series of homologous additives is closely related to the ability to induce the form II compound with similar packing but a different conformation to that of form I. The novel use of additives demonstrates the direct link between solute aggregation in solution and molecule conformation in crystals.
