1n4e

<StructureSection load='1n4e' size='340' side='right' caption='[[1n4e]], [[Resolution|resolution]] 2.50&Aring;' scene=''>

<table><tr><td colspan='2'>[[1n4e]] is a 4 chain structure. The July 2007 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Thymine Dimers'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2007_7 10.2210/rcsb_pdb/mom_2007_7]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N4E OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1N4E FirstGlance]. <br>

</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1n4e FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n4e OCA], [http://pdbe.org/1n4e PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1n4e RCSB], [http://www.ebi.ac.uk/pdbsum/1n4e PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1n4e ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

It is well known that exposure to UV induces DNA damage, which is the first step in mutagenesis and a major cause of skin cancer. Among a variety of photoproducts, cyclobutane-type pyrimidine photodimers (CPD) are the most abundant primary lesion. Despite its biological importance, the precise relationship between the structure and properties of DNA containing CPD has remained to be elucidated. Here, we report the free (unbound) crystal structure of duplex DNA containing a CPD lesion at a resolution of 2.0 A. Our crystal structure shows that the overall helical axis bends approximately 30 degrees toward the major groove and unwinds approximately 9 degrees, in remarkable agreement with some previous theoretical and experimental studies. There are also significant differences in local structure compared with standard B-DNA, including pinching of the minor groove at the 3' side of the CPD lesion, a severe change of the base pair parameter in the 5' side, and serious widening of both minor and major groves both 3' and 5' of the CPD. Overall, the structure of the damaged DNA differs from undamaged DNA to an extent that DNA repair proteins may recognize this conformation, and the various components of the replicational and transcriptional machinery may be interfered with due to the perturbed local and global structure.

Crystal structure of a DNA decamer containing a cis-syn thymine dimer.,Park H, Zhang K, Ren Y, Nadji S, Sinha N, Taylor JS, Kang C Proc Natl Acad Sci U S A. 2002 Dec 10;99(25):15965-70. Epub 2002 Nov 27. PMID:12456887<ref>PMID:12456887</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1n4e" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Kang, C]]

[[Category: Nadji, S]]

[[Category: Park, H]]

[[Category: Ren, Y]]

[[Category: Sinha, N]]

[[Category: Taylor, J S]]

[[Category: Zhang, K]]

[[Category: Uv-damaged dna]]