The resolution is an important quality criterion of protein structures. The lower the resolution, the lower the significance of a protein structure. From about 2.5 angstroms, the exact spatial orientation of a side chain is generally no longer possible.
The measurement method used has a significant impact on the resolution. In protein crystallography, resolutions of about 2.0 angstroms are typically achieved. When using cryo-EM, the resolution averages only around 3.5 angstroms.
The data comes from the protein database (PDB) for the year 2022 (status: 2022-11-12).