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-helical Gly-rich loop. The secondary structure of the Gly-rich loop might be regulated by the ligand structure.The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section D: Biological Crystallography.
See also Forthcoming articles in all IUCr journals.
Synopsis: Crystal structures of the free and ATP-bound forms of Ap4A hydrolase from A. aeolicus have been determined at 1.8 and 1.95 Å resolution, respectively. The ATP-bound crystal structure shows the binding of the product molecule at the primary active site and the substrate molecule at a noncatalytic site near the N-terminal region of the enzyme.
Synopsis: Two crystal modifications of a collagen model peptide with a Hyp-Hyp-Gly sequence in the middle of 27 residues were analyzed at high resolution. Differences between the molecular interactions of these modifications revealed clear preferences of the Hyp(X) puckering.
Synopsis: The crystal structure of TEI-I01800 as a pyrazolo[1,5-a]pyrimidine scaffold inhibitor bound to MK2 showed an -helical Gly-rich loop. The secondary structure of the Gly-rich loop might be regulated by the ligand structure.
Synopsis: The new developments in evolutionary biology are reviewed to encourage a fruitful dialog between structural and evolutionary biologists.
Synopsis: Monitoring changes in B values using self-interaction chromatography combined with crystallization trials resulted in single straight-edged crystals of light-harvesting complex 1-reaction centre from A. vinosum. The method allows the rapid screening of additives and detergents.
Synopsis: The X-ray structure (at 1.86 Å resolution) of S. typhimurium uridine nucleoside phosphorylase complexed with its inhibitor 2,2'-anhydrouridine and phosphate and potassium ions is reported.
Synopsis: The structure of dihydrodipicolinate reductase from M. tuberculosis has been determined in three different crystal forms as the apo form of the enzyme and as a binary complex with the cofactor NADH. A comparison of the structures reveals a striking domain rotation, which can be rationalized by normal-mode analysis.
Synopsis: The first structure of the family 3b' CBM derived from the Cel9V glycoside hydrolase of C. thermocellum, which fails to bind crystalline cellulose, is presented.
Synopsis: The distribution of the twinning ratio of crystals of bacteriorhodopsin was studied under a variety of in meso crystallization conditions. A condition favouring the growth of untwinned crystals was determined.
Synopsis: The molecular-replacement program MOLREP is described.
Synopsis: MolProbity structure validation will diagnose most local errors in macromolecular crystal structures and help to guide their correction.
Synopsis: The crystal structure of the HindIII-cognate DNA complex was solved with and without metal cations.
Synopsis: The crystal structures of the apo and holo forms of NAD+-dependent formate dehydrogenase (FDH) from the methylotrophic bacterium Moraxella sp. C-1 are reported. The structure of the apo form in the closed conformation provides insights into the mechanism of closure of the interdomain cleft in FDH.
Synopsis: Radiation-induced decay of crystal diffraction and additional specific chemical changes of macromolecules forming the crystal lattice are currently two of the main limiting factors in the acquisition of macromolecular diffraction data and macromolecular structure determination. Data-processing and phasing protocols are discussed in the context of radiation-induced changes.
Synopsis: The crystal structure of apo sucrose hydrolase from X. campestris pv. campestris is reported.
Synopsis: Measurements of the average thermal contractions (294![[rightwards arrow]](/logos/entities/rarr_rmgif.gif)
72 K) of 26 different cryosolutions are presented and discussed in conjunction with other recent advances in the rational design of protocols for cryogenic cooling in macromolecular crystallography.
Synopsis: The structure of the X (ADRP) domain of nonstructural protein 3 from feline coronavirus has been determined in two crystal forms. The binding of glycerol-3-phosphate and ADP-ribose is described.
Synopsis: The crystal structure of the Taz2 zinc-finger domain of the human p300 transcriptional coactivator was determined using the anomalous diffraction signal of the bound Zn ions. Crystal contacts suggested a possible novel mode of Taz2-peptide ligand interactions.
Synopsis: When properly applied, pseudosymmetry can be used to improve crystallographic phases through averaging and to facilitate crystal structure determination.
Synopsis: Conventional and free R factors and their difference, as well as the ratio of the number of measured reflections to the number of atoms in the crystal, were studied as functions of the resolution at which the structures were reported. When the resolution was taken uniformly on a logarithmic scale, the most frequent values of these functions were quasi-linear over a large resolution range.
Synopsis: Several new methods are evaluated for use in the improvement of experimental phases in the framework of a classical density-modification calculation. These methods have been implemented in a new computer program, Parrot.
Synopsis: A description is given of a robust procedure for the purification of 50S ribosomal subunits from D. radiodurans that consistently crystallize to form crystals that give diffraction patterns extending to 2.9 Å resolution. Factors that may influence the ability to form crystals are systematically evaluated and future areas of study aresuggested.
Synopsis: Diffraction data-collection parameters leading to optimal data quality are discussed in the context of different applications of these data.
Synopsis: Experimental phasing with SHELXC/D/E has been enhanced by the incorporation of main-chain tracing into the iterative density modification; this also provides a simple and effective way of exploiting noncrystallographic symmetry (NCS).
Synopsis: The crystal structure of a laminin-binding adhesin (Lmb) from S. agalactiae was determined at 2.5 Å resolution. The structure of Lmb will allow further investigations into the possible dual role of Lmb as an adhesin and in metal homeostasis.
Synopsis: The crystal structure of H. pylori L-asparaginase in the presence of L-Asp was determined at 1.4 Å resolution and revealed changes in loops involved in the formation of the active site.
-spectrin SH3-domain crystalsSynopsis: The key role of Pro20 in the crystal nucleation and growth rate of the -spectrin SH3 domain has been investigated.
Synopsis: The HC1b is a new user-friendly humidity-control device that is compatible with standard X-ray beamlines. It is used to improve the diffraction properties of macromolecular crystals by optimizing their hydration state.
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