6QWG image
Entry Detail
PDB ID:
6QWG
Keywords:
Title:
Serial Femtosecond Crystallography Structure of Cu Nitrite Reductase from Achromobacter cycloclastes: Nitrite complex at Room Temperature
Biological Source:
PDB Version:
Deposition Date:
2019-03-05
Release Date:
2019-11-20
Method Details:
Experimental Method:
Resolution:
1.90 Å
R-Value Free:
0.17
R-Value Work:
0.13
R-Value Observed:
0.13
Space Group:
P 21 3
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Copper-containing nitrite reductase
Chain IDs:A
Chain Length:333
Number of Molecules:1
Biological Source:Achromobacter cycloclastes
Primary Citation
High-throughput structures of protein-ligand complexes at room temperature using serial femtosecond crystallography.
Iucrj 6 1074 1085 (2019)
PMID: 31709063 DOI: 10.1107/S2052252519011655

Abstact

High-throughput X-ray crystal structures of protein-ligand complexes are critical to pharmaceutical drug development. However, cryocooling of crystals and X-ray radiation damage may distort the observed ligand binding. Serial femtosecond crystallography (SFX) using X-ray free-electron lasers (XFELs) can produce radiation-damage-free room-temperature structures. Ligand-binding studies using SFX have received only modest attention, partly owing to limited beamtime availability and the large quantity of sample that is required per structure determination. Here, a high-throughput approach to determine room-temperature damage-free structures with excellent sample and time efficiency is demonstrated, allowing complexes to be characterized rapidly and without prohibitive sample requirements. This yields high-quality difference density maps allowing unambiguous ligand placement. Crucially, it is demonstrated that ligands similar in size or smaller than those used in fragment-based drug design may be clearly identified in data sets obtained from <1000 diffraction images. This efficiency in both sample and XFEL beamtime opens the door to true high-throughput screening of protein-ligand complexes using SFX.

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