issue contents

Journal logoSTRUCTURAL
ISSN: 2059-7983

April 2023 issue

Highlighted illustration

Cover illustration: A selection of structures from the virtual special issue on room temperature structural biology available at


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Room-temperature biological crystallography has seen a resurgence in recent years and a collection of articles recently published in IUCrJ, Acta Cryst. D Structural Biology and Acta Cryst. F Structural Biology Communications, have been collected together to produce a virtual special issue at

research papers

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Likelihood-based rotation, translation and refinement targets have been derived for docking models into cryo-EM reconstructions.

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Exploiting analogies to crystallographic molecular replacement, a strategy for docking into cryo-EM maps is informed by the calculation of expected log-likelihood-gain scores.

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Ambient temperature structures of B. longum phosphoketolase holoenzyme and its complex with a putative inhibitor, phosphoenolpyruvate, demonstrated striking conformational change of the loop at the entrance to the active-site pocket compared with known cryogenic temperature phosphoketolase structures. This structural change highlighted the reaction mechanism and substrate specificity of this enzyme.

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L-Proline trans-hydroxylase and its complexes with substrate and product reveal the structural basis of trans–cis proline hydroxylation selectivity. Structure-based sequence alignment and structural comparison suggest signatures for in-line or off-line AKG-binding modes in AKG-dependent hydroxylases and provide deeper insight into AKG-dependent hydroxylation.

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A neural network trained to identify unfavourable fragments and therefore improve protein model building in the Buccaneer software is described.

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A new equation for the calculation of substructure-factor amplitudes for substructure detection from a single-wavelength anomalous diffraction experiment produces better results compared with the currently used estimates in test cases.

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The crystal structure of the electron transfer complex between arsenite oxidase (AioAB) from Pseudorhizobium banfieldiae sp. strain NT-26 and its native electron acceptor cytochrome c552 (cytc552) is presented. Cytc552 docks within a cleft at the interface of the AioA and AioB subunits, which allows a close association between redox cofactors.; this close association presumably facilitates fast electron transfer and underpins the ability of this organism to respire in arsenic contaminated environments.

addenda and errata

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