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Radiation damage to nucleoprotein complexes in macromolecular crystallography

Journal Article · · Journal of Synchrotron Radiation (Online)
 [1];  [2];  [2];  [3];  [4];  [5];  [5]
  1. Univ. of Oxford (United Kingdom). Dept. of Biochemistry; DOE Office of Scientific and Technical Information (OSTI)
  2. Univ. of Oxford (United Kingdom). Dept. of Biochemistry
  3. Maastricht Univ. (Netherlands). Inst. of Nanoscopy
  4. Univ. of Notre Dame, IN (United States). Notre Dame Radiation Lab.
  5. Univ. of Portsmouth (United Kingdom). Inst. of Biomedical and Biomolecular Sciences
Significant progress has been made in macromolecular crystallography over recent years in both the understanding and mitigation of X-ray induced radiation damage when collecting diffraction data from crystalline proteins. Despite the large field that is productively engaged in the study of radiation chemistry of nucleic acids, particularly of DNA, there are currently very few X-ray crystallographic studies on radiation damage mechanisms in nucleic acids. Quantitative comparison of damage to protein and DNA crystals separately is challenging, but many of the issues are circumvented by studying pre-formed biological nucleoprotein complexes where direct comparison of each component can be made under the same controlled conditions. A model protein–DNA complex C.Esp1396I is employed to investigate specific damage mechanisms for protein and DNA in a biologically relevant complex over a large dose range (2.07–44.63 MGy). In order to allow a quantitative analysis of radiation damage sites from a complex series of macromolecular diffraction data, a computational method has been developed that is generally applicable to the field. Typical specific damage was observed for both the protein on particular amino acids and for the DNA on, for example, the cleavage of base-sugar N1—C and sugar-phosphate C—O bonds. Strikingly the DNA component was determined to be far more resistant to specific damage than the protein for the investigated dose range. We observed the protein at low doses and found that they were susceptible to radiation damage while the DNA was far more resistant, damage only being observed at significantly higher doses.
Research Organization:
Univ. of Notre Dame, IN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
FC02-04ER15533
OSTI ID:
1345569
Alternate ID(s):
OSTI ID: 22437344
Journal Information:
Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 2 Vol. 22; ISSN 1600-5775; ISSN JSYRES
Publisher:
International Union of CrystallographyCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (10)

Radiation Damage in Macromolecular Crystallography—An Experimentalist’s View journal April 2018
Valence Photoionization of Thymine: Ionization Energies, Vibrational Structure, and Fragmentation Pathways from the Slow to the Ultrafast journal October 2019
Photoinduced Processes within Noncovalent Complexes Involved in Molecular Recognition journal January 2020
Radiation Damage in Macromolecular Crystallography book January 2017
Radiation Damage in Macromolecular Crystallography journal November 2015
RIDL : a tool to investigate radiation-induced density loss journal May 2018
Radiation-damage investigation of a DNA 16-mer journal June 2019
Radiation-damage investigation of a DNA 16-mer text January 2019
X-ray radiation damage to biological samples: recent progress journal July 2019
Valence Photoionization of Thymine: Ionization Energies, Vibrational Structure, and Fragmentation Pathways from the Slow to the Ultrafast text January 2019

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