5AI3 image
Entry Detail
PDB ID:
5AI3
Title:
X-ray structure of 113Cd-substituted Perdeuterated Pyrococcus furiosus rubredoxin to 1.02A resolution at 295K in a quartz capillary
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2015-02-11
Release Date:
2016-03-02
Method Details:
Experimental Method:
Resolution:
1.02 Å
R-Value Free:
0.12
R-Value Work:
0.10
R-Value Observed:
0.10
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:RUBREDOXIN
Chain IDs:A
Chain Length:54
Number of Molecules:1
Biological Source:PYROCOCCUS FURIOSUS
Ligand Molecules
Primary Citation
Macromolecular Structure Phasing by Neutron Anomalous Diffraction.
Sci.Rep. 6 31487 ? (2016)
PMID: 27511806 DOI: 10.1038/SREP31487

Abstact

In this report we show for the first time that neutron anomalous dispersion can be used in a practical manner to determine experimental phases of a protein crystal structure, providing a new tool for structural biologists. The approach is demonstrated through the use of a state-of-the-art monochromatic neutron diffractometer at the Institut Laue-Langevin (ILL) in combination with crystals of perdeuterated protein that minimise the level of hydrogen incoherent scattering and enhance the visibility of the anomalous signal. The protein used was rubredoxin in which cadmium replaced the iron at the iron-sulphur site. While this study was carried out using a steady-state neutron beam source, the results will be of major interest for capabilities at existing and emerging spallation neutron sources where time-of-flight instruments provide inherent energy discrimination. In particular this capability may be expected to offer unique opportunities to a rapidly developing structural biology community where there is increasing interest in the identification of protonation states, protein/water interactions and protein-ligand interactions - all of which are of central importance to a wide range of fundamental and applied areas in the biosciences.

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