forthcoming articles

The following articles are a selection of those recently accepted for publication in Acta Crystallographica Section D: Structural Biology.

See also Forthcoming articles in all IUCr journals.

Accepted 26 May 2017

Recent developments in the CCP-EM software suite

An overview is given of the new CCP-EM software suite, including the underpinning framework, the current functionality and the distribution procedure. This first version of the suite has a focus on building and refining atomic models.

Accepted 25 May 2017

Factors affecting the amplitude of the τ angle in proteins: a revisitation

Statistical surveys of protein structures unravel that the backbone conformation in terms of (ϕ, ψ) is the most important factor in τ angle modulation.

Accepted 24 May 2017

DNA conformational transitions inferred from re-evaluation of m|Fo| − D|Fc| electron-density maps

Reevaluation of m|Fo|-D|Fc| electron density maps revealed that potential conformational transitions of 27% of DNA phosphates are found in previous crystallographic data. Our analysis suggests that some of these unassigned densities correspond to ZI<-> ZII or A/B -> BI transitions.

Accepted 24 May 2017

Seeing but not believing: structure of glycerol de­hydrogenase initially assumed to be the structure of a survival protein from Salmonella typhimurium

A seemingly reasonable solution was obtained for the structure of a presumed mutant of Salmonella typhimurium survival protein (SurE) by molecular replacement (MR) using the wild-type SurE structure as the phasing model. Although the crystal was that of glycerol dehydrogenase as demonstrated later by a MarathonMR protocol, the initial structure appeared to be reasonable because of the partial similarity in the arrangement of secondary structural elements in the two proteins.

Accepted 24 May 2017

Electron Bio-Imaging Centre (eBIC): the UK national research facility for biological electron microscopy

This paper provides an introduction to the Electron Bio-Imaging Centre (eBIC) at Diamond Light Source: an external user facility established in the UK for high-end cryo-electron microscopy. Details are given of the first year of operation along with highlights and future challenges.

Accepted 19 May 2017

Octamer formation in lysozyme solutions at the initial crystallization stage detected by small-angle neutron scattering

The lysozyme solution in heavy water with the precipitant addition was studied by the small angle neutron scattering (SANS) for lysozyme concentrations 40, 20, 10 mg/ml and temperatures 10 oC, 20 oC, and 30 oC. Above protein monomers also dimer and octamer oligomers have been found in solutions with maximal concentration near optimal crystallization conditions. The volume fractions of octamers are decreasing with the deviation from the optimal temperature and with the decrease of the protein concentration. Without the precipitant, only monomers are present in solution.

Accepted 19 May 2017

The ribosome and its role in protein folding: looking through a magnifying glass

The structural biology of co-translational protein folding on the ribosome is reviewed.

Accepted 10 May 2017

Probing the structural basis of oxygen binding in a cofactor-independent dioxygenase

The crystal structure of the cofactor-independent dioxygenase DpgC was refined and the new structure was used to probe the basis for dioxygen binding using site-directed mutagenesis.

Accepted 10 May 2017

High-resolution cryo-EM proteasome structures in drug development

High-resolution cryo-EM was used to investigate the structures of inhibitor-bound human and P. falciparum 20S proteasomes, revealing the molecular basis for inhibitor specificity that provides a platform for the development of a potential new class of antimalarials. Here, these studies are reviewed and a detailed description of the methods used for structure determination is provided.

Accepted 10 May 2017

Rapid cadmium SAD phasing at the standard wavelength (1 Å)

Single-wavelength anomalous dispersion (SAD) phasing experiments were successfully carried out at the standard wavelength of 1 Å by using cadmium ions as anomalous scatterers.

Accepted 26 April 2017

Crystal structure of Yersinia pestis virulence factor YfeA reveals two polyspecific metal-binding sites

YfeA, a substrate-binding protein that is important for the virulence of Y. pestis, has two polyspecific metal-binding sites that may play different roles during infection. A flexible lobe at the carboxy-terminus suggests that structural rearrangement is required for metal transfer to binding partners.

Accepted 13 April 2017

Nanomaterials for Tumor Targeting Theranostics. A Proactive Clinical Perspective

A review of the book Nanomaterials for Tumor Targeting Theranostics: A Proactive Clinical Perspective.

Accepted 9 February 2017

1.8 Å resolution crystal structure of the carbapenem intrinsic resistance protein CarF

The crystal structure of the carbapenem-resistance protein CarF has been determined at 1.8 Å resolution. CarF confers partial intrinsic resistance to the naturally occurring antibiotic 1-carbapen-2-em-3-carboxylic acid.

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