1T4I

Crystal Structure of a DNA Decamer Containing a Thymine-dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of a DNA Decamer Containing a cis-syn Thymine-dimer

Park, H.Zhang, K.Ren, Y.Nadji, S.Sinha, N.Taylor, J.S.Kang, C.

(2002) Proc.Natl.Acad.Sci.USA 99: 15965-15970

  • DOI: 10.1073/pnas.242422699
  • Primary Citation of Related Structures:  1MV7, 1N4E, 1SM5

  • PubMed Abstract: 
  • 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. De ...

    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.


    Organizational Affiliation

    School of Molecular Biosciences, Washington State University, Pullman, WA 99164-4660, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*GP*CP*TP*TP*AP*AP*TP*TP*CP*G)-3'A,C10N/A
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*CP*GP*AP*AP*TP*TP*AP*AP*GP*C)-3'B,D10N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 21.110α = 90.00
b = 54.010β = 90.00
c = 74.190γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
DENZOdata reduction
X-PLORmodel building
SCALEPACKdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-05-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance