Calculating and plotting FSC curves on a uniform scale in inverse cubic resolution (Å−3) has several useful features.

The results of the Foldit citizen science puzzles for crystallographic models and their integration into the PDB-REDO databank are discussed.

We have studied the copper sites in three cryogenic electron-microscopy structures of particulate methane monooxygenase with quantum refinement. We show that the CuA, CuC and CuD sites are correctly modelled and that the CuB site is mononuclear in all structures, whereas we find no support for copper in the suggested trinuclear active site or two sites in the so-called copper sponge in PDB entry 7ev9.

YouTube video by International Union of Crystallography

The role of the hinge loop and the open interface in the 3D domain swapping of the c-Src SH3 domain is reported.

Variants HNL16, HNL40 and HNL71 of hydroxynitrile lyase from Hevea brasiliensis contain 16, 40 and 71 mutations, respectively, to make increasingly larger regions surrounding the active site identical in sequence to the esterase SABP2. X-ray structures of HNL40 and HNL71 reveal changes to the oxyanion hole and a new tunnel, which may contribute to their efficient esterase activity.