View source for 4x4g


==RADIATION DAMAGE TO THE NUCLEOPROTEIN COMPLEX C.Esp1396I: DOSE (DWD) 26.8 MGy==
<StructureSection load='4x4g' size='340' side='right'caption='[[4x4g]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4x4g]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Enterobacter_sp._RFL1396 Enterobacter sp. RFL1396] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4X4G OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4X4G FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4x4g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4x4g OCA], [https://pdbe.org/4x4g PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4x4g RCSB], [https://www.ebi.ac.uk/pdbsum/4x4g PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4x4g ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q8GGH0_9ENTR Q8GGH0_9ENTR] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
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. In contrast, 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. Here 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. At low doses the protein was observed to be susceptible to radiation damage while the DNA was far more resistant, damage only being observed at significantly higher doses.

Radiation damage to nucleoprotein complexes in macromolecular crystallography.,Bury C, Garman EF, Ginn HM, Ravelli RB, Carmichael I, Kneale G, McGeehan JE J Synchrotron Radiat. 2015 Mar;22(Pt 2):213-24. doi: 10.1107/S1600577514026289., Epub 2015 Jan 30. PMID:25723923<ref>PMID:25723923</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4x4g" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Enterobacter sp. RFL1396]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Bury CS]]
[[Category: Garman EF]]
[[Category: McGeehan JE]]