Structure determination

MicroED for structure determination without a model and with heavy metal guitar riffs.

New data collection methods enable ab initio protein structure determination by micro-electron diffraction for the first time.

B_net provides a measure of radiation damage suffered by protein crystals during X-ray crystallography.

Eukaryotes possess several clamp loaders comprising four common subunits and a fifth subunit unique to each complex. The RFC-A–E clamp loader loads the PCNA clamp at 3′-recessed structures for DNA replication. However, swapping a single subunit, Rad24, for RFC-A yields a clamp loader that prefers the 911 clamp and 5′-recessed DNA. Three new studies reveal detailed views of the clamp loading reaction and provide insights into substrate preferences of each loader.

High-resolution structural information is critical for rapid development of vaccines and therapeutics against emerging human pathogens. Structural biology methods have been at the forefront of research on SARS-CoV-2 since the beginning of the COVID-19 pandemic. These technologies will continue to be powerful tools to fend off future public health threats.

Automated single-particle picking in electron cryo-microscopy data has seen important advances in the past couple of years and now enables computer-assisted particle selection even for challenging datasets. These advances have implications for streamlined and automated image processing, with potential benefits for improving the resolution of resulting structures.