8PYV image
Entry Detail
PDB ID:
8PYV
Keywords:
Title:
Structure of Human PS-1 GSH-analog complex, solved at wavelength 2.755 A
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2023-07-26
Release Date:
2023-10-25
Method Details:
Experimental Method:
Resolution:
1.77 Å
R-Value Free:
0.21
R-Value Work:
0.19
R-Value Observed:
0.21
Space Group:
H 3
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Prostaglandin E synthase
Chain IDs:A
Chain Length:152
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation

Abstact

Despite recent advances in cryo-electron microscopy and artificial intelligence-based model predictions, a significant fraction of structure determinations by macromolecular crystallography still requires experimental phasing, usually by means of single-wavelength anomalous diffraction (SAD) techniques. Most synchrotron beamlines provide highly brilliant beams of X-rays of between 0.7 and 2 Å wavelength. Use of longer wavelengths to access the absorption edges of biologically important lighter atoms such as calcium, potassium, chlorine, sulfur and phosphorus for native-SAD phasing is attractive but technically highly challenging. The long-wavelength beamline I23 at Diamond Light Source overcomes these limitations and extends the accessible wavelength range to λ = 5.9 Å. Here we report 22 macromolecular structures solved in this extended wavelength range, using anomalous scattering from a range of elements which demonstrate the routine feasibility of lighter atom phasing. We suggest that, in light of its advantages, long-wavelength crystallography is a compelling option for experimental phasing.

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