issue contents

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047

November 1998 issue

Highlighted illustration

Cover illustration: The balhimycin dimer, with citrate and acetate ions in the binding pockets, colour coded on a scale where the most mobile atoms are red and the least mobile are blue. The binding pockets are clearly the most mobile, consistent with the idea that they can open and close to complex with cell-wall binding peptides. Courtesy of George Sheldrick.

research papers


link to html
Boronic acid-containing inhibitors of human α-thrombin were elaborated using structure-based design approaches. Introduction of substituents to an inhibitor aromatic ring modulated the strength of an edge-to-face interaction and, in other cases, resulted in a new inhibitor binding mode.

link to html
The variation in the extent of the orientational ordering of protein molecules has been revealed for tetragonal lysozyme single crystals of different quality on the basis of their polarized Raman spectra.

link to html
The joint probability distribution of electron density and its gradient in protein electron-density maps was found to be independent of structural conformation and sensitive to phase error. This suggests that it could be used as a constraint for protein phase refinement and extension.

link to html
The crystal structure of a designed variant of the ROP protein has been refined to a resolution of 1.09 Å. Modelling disorder and refinement of anisotropic motion played a signicant role in achieving convergence.

link to html
In the structure determination of echovirus 1, subtle interactions between crystallographic and non-crystallographic symmetries caused the space group to be ambiguous, but also allowed significant short cuts in the molecular-replacement calculations.

link to html
A new Z-DNA structure d(TGCGCA)2 determined at 120 K to a resolution of 1.3 Å was compared with other DNA crystal structures. Their packing and interaction with cations and water is discussed.

link to html
The power of maximum-likelihood structure refinement is increased further by the addition of prior phase information.

link to html
The first near-atomic resolution structure of a T = 4 virus was determined with progressively higher resolution models for phase calculation and 60-fold non-crystallographic symmetry for phase refinement and extension. Phases at low resolution were computed with a hollow sphere and they were refined and extended to higher resolution which allowed more detailed models to be fit to the density and used for phase computation for the next round of phase extension.

link to html
Average multipole parameters obtained from charge-density studies of peptides have been transferred to a 310 helix octapeptide structure at 0.82 Å resolution. The improvement of the crystal structure as well as the limits of application to oligopeptides and proteins of the multipole transfer are discussed.

link to html
Refinement of the structure of human apolactoferrin at 2.0 Å resolution has revealed a possible mechanism whereby conformational changes in the N-lobe of the protein can be signalled to the C-lobe.

link to html
The revived application of the classical molecular Fourier transform method has been used to solve the structures of proteins and DNA from X-ray diffraction data.

link to html
The structures of a new crystal form of ribonuclease A and its low-humidity variant have been determined. A comparison of these structures with those of other forms provide information on the plasticity of the protein molecule, role of invariant water molecules and the relation between accessibility and hydration.

link to html
The crystal structure of spinach ferredoxin I provides a structural framework for the interpretation of the large amount of data on this protein present in the literature.

link to html
In order to assess the feasibility of time-resolved studies on the enzyme acetylcholinesterase, a Laue data set with a total exposure time of 24 ms has been collected. Electron-density maps clearly show the soaked-in ligand as well as a small structural change in the active site.

link to html
The work describes the first crystal structure of the human papillomavirus serotype 31 E2 DNA-binding domain. The overall structure is discussed, novel features are described, and implications to be previous work are given.

link to html
HREM observation of octocalcium phosphate (OCP) in human dentine crystal and of its hydrolysis to hydroxyapatite is described. OCP is a transient phase during biological crystal growth.

link to html
The crystallization of T. thermophilus tRNAAsp complexed with its cognate aspartyl-tRNA synthetase is described. The Matthews coefficient has been determined and compared with those obtained for other aminoacylation systems.

link to html
Strategies to produce protein crystals benefit tremendously from knowledge of the protein's solubility and the rate of crystal growth as a function of temperature and initial sample composition. This article describes a method to obtain such information within a matter of a few days utilizing a modest amount of protein in a nondestructive fashion via isothermal microcalorimetry.

crystallization papers


link to html
Crystals of archaeal O6-methylguanine–DNA methyltransferase from Pyrococcus kodakaraensis strain KOD1 have been grown and diffract to 2.0 Å resolution upon exposure to Cu Kα X-rays.

link to html
Crystals of the pyridoxal-phosphate-dependent aminotransferase involved in the antepenultimate step in biotin biosynthesis have been obtained and analyzed with respect to cell dimensions, space group and suitability for a crystallographic structure determination.

link to html
OmpC osmoporin from E. coli has been crystallized under a variety of conditions. The crystals belong to space group P21 and diffract to 4 Å.

link to html
Diffraction-quality crystals of the unliganded mouse recombinant catalytic subunit of cAMP-dependent protein kinase have been grown by the hanging-drop vapour-diffusion technique using 2-methyl-2,4-pentanediol as precipitant and preliminary X-ray analysis has been carried out.

link to html
Tropinone reductase II, an NADPH-dependent oxidoreductase involved in a plant alkaloid metabolism, has been crystallized using a macroseeding technique. A data set to 2.6 Å resolution has been collected at a cryogenic temperature.

link to html
Crystals of a complex between ovine placental lactogen, a close prolactin homologue, and two copies of the extracellular portion of the rat prolactin receptor have been grown. The crystal structure of this complex will shed light on the structural reasons for cross-reactivity and specificity among the endocrine hormones, placental lactogen and growth hormone.

link to html
The chitinase from C. immitis has been crystallized in a form suitable for high-resolution diffraction studies.

link to html
Prolyl oligopeptidase, a member of a new serine protease class, has been crystallized in the presence of an inhibitor. The crystals diffract to 2.3 Å resolution.

link to html
Crystals of the R. meliloti DctD two-component receiver domain, expressed in E. coli and purified to homogeneity, were obtained using the hanging-drop vapor-diffusion method. They diffract to 2.3 Å and exhibit the symmetry of space group I222 or I212121 with cell dimensions a = 59.0, b = 58.6, and c = 169.8 Å.

link to html
The triosephosphate isomerase (TIM) from the Archaeon hyperthermophilic is tetrameric, in contrast to most other TIMs, which are dimeric. The crystallization of this hyperthermophilic TIM is reported and should lead to an understanding of the nature of protein thermostability in the enzyme.


link to html
The crystallization of C. perfringens α-toxin (from two different strains), the key determinant of gas-gangrene disease, is reported, in two different forms. The structure of this toxin will provide important new information towards elucidating the pathogenesis of this often lethal disease.

link to html
The flavoenzyme polyamine oxidase plays an important role in the regulation of polyamine intracellular concentration. Crystals of maize polyamine oxidase suitable for structure determination have been grown using ammonium sulfate as precipitant.

link to html
The lactonohydrolase from F. oxysporum was crystallized in the presence of polyethylene glycol 4000 as a precipitant. The crystals belong to the monoclinic space group P21 with unit-cell parameters a = 156, b = 100, c = 94.1 Å, β = 91.7°.

link to html
The homing endonuclease I-DmoI has been crystallized. Crystals diffract to 2.3 Å resolution and are suitable for structure determination.

link to html
Piratoxin II, a phospholipase A2 from B. pirajai has been crystallized in a monoclinic space group and its structure has been solved by molecular replacement at 2.04 Å resolution.

link to html
The crystallization and preliminary X-ray analysis of T. serrulatus neurotoxin Ts-γ is reported. It crystallizes in space group P21 with one molecule per asymetric unit has been solved by molecular replacement at 1.73 Å resolution.

link to html
Analysis of the X-ray diffraction data collected on single crystals of a calcium-binding protein from E. histolytica suggests that the protein resembles the canonical calmodulin.

link to html
The seed lectin DBL and the related stem and leaves lectin DB58 of the tropical legume Dolichos biflorus were crystallized, as well as complexes of DBL with adenine and with GalNAc(α1-3)[Fuc(α1-2)]Gal.

link to html
Human plasma apolipoprotein H (Mw ≃ 50 kDa) plays an important role in blood coaguilation and antiphospholipid autoimmune disease. With synchrotron radiation, apolipoprotein H crystals diffracted to 3.0 Å resolution and belong to the orthorhombic space group C2221 with a = 158.47, b = 169.25, c = 113.28 Å (at 100 K).

link to html
Crystals of the DNA-binding protein GerE from B. subtilis have been grown in a form suitable for X-ray diffraction studies.

link to html
Crystals of an antibody fragment specific to the blood-group A carbohydrate antigen have been grown and diffract to 0.93 Å resolution. The protein was expressed from a synthetic gene construct, and the kinetics of antibody–antigen binding have been determined by surface plasmon resonance.

link to html
The PhoB receiver domain has been crystallized and X-ray diffraction data to 1.88 Å resolution have been collected using synchrotron radiation. The crystals contain two molecules per asymmetric unit, suggesting that the active dimer has been formed.

short communications


link to html
The pneumococcal surface antigen PsaA has been produced and crystallized. The structure of this protein is currently being determined via multiple isomorphous replacement.

link to html
We have crystallized yeast glyceraldehyde 3-phosphate dehydrogenase in order to use this enzyme as a probe for possible enzyme–enzyme interactions.

fast communications


link to html
The N-terminal transactivation domain of the E2 protein from human papillomavirus type 16 has been crystallized. This domain interacts with both the HPV E1 protein and at least three cellular transcription factors.
Follow Acta Cryst. D
Sign up for e-alerts
Follow Acta Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds