1UA0

Aminofluorene DNA adduct at the pre-insertion site of a DNA polymerase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Observing translesion synthesis of an aromatic amine DNA adduct by a high-fidelity DNA polymerase

Hsu, G.W.Kiefer, J.R.Burnouf, D.Becherel, O.J.Fuchs, R.P.P.Beese, L.S.

(2004) J.Biol.Chem. 279: 50280-50285

  • DOI: 10.1074/jbc.M409224200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Aromatic amines have been studied for more than a half-century as model carcinogens representing a class of chemicals that form bulky adducts to the C8 position of guanine in DNA. Among these guanine adducts, the N-(2'-deoxyguanosin-8-yl)-aminofluore ...

    Aromatic amines have been studied for more than a half-century as model carcinogens representing a class of chemicals that form bulky adducts to the C8 position of guanine in DNA. Among these guanine adducts, the N-(2'-deoxyguanosin-8-yl)-aminofluorene (G-AF) and N-2-(2'-deoxyguanosin-8-yl)-acetylaminofluorene (G-AAF) derivatives are the best studied. Although G-AF and G-AAF differ by only an acetyl group, they exert different effects on DNA replication by replicative and high-fidelity DNA polymerases. Translesion synthesis of G-AF is achieved with high-fidelity polymerases, whereas replication of G-AAF requires specialized bypass polymerases. Here we have presented structures of G-AF as it undergoes one round of accurate replication by a high-fidelity DNA polymerase. Nucleotide incorporation opposite G-AF is achieved in solution and in the crystal, revealing how the polymerase accommodates and replicates past G-AF, but not G-AAF. Like an unmodified guanine, G-AF adopts a conformation that allows it to form Watson-Crick hydrogen bonds with an opposing cytosine that results in protrusion of the bulky fluorene moiety into the major groove. Although incorporation opposite G-AF is observed, the C:G-AF base pair induces distortions to the polymerase active site that slow translesion synthesis.


    Related Citations: 
    • Structures of Mismatch Replication Errors Observed in a DNA Polymerase
      Johnson, S.J.,Beese, L.S.
      (2004) Cell 116: 803
    • Processive DNA synthesis observed in a polymerase crystal suggests a mechanism for the prevention of frameshift mutations
      Johnson, S.J.,Taylor, J.S.,Beese, L.S.
      (2003) Proc.Natl.Acad.Sci.USA 100: 3895
    • Visualizing DNA replication in a catalytically active Bacillus DNA polymerase crystal
      Kiefer, J.R.,Mao, C.,Braman, J.C.,Beese, L.S.
      (1998) Nature 391: 304


    Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase I
A
580Geobacillus kaustophilus (strain HTA426)Mutation(s): 0 
Gene Names: polA
EC: 2.7.7.7
Find proteins for Q5KWC1 (Geobacillus kaustophilus (strain HTA426))
Go to UniProtKB:  Q5KWC1
Entity ID: 1
MoleculeChainsLengthOrganism
DNA primer strandB10N/A
Entity ID: 2
MoleculeChainsLengthOrganism
DNA template strand with aminofluorene adductC14N/A
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SUC
Query on SUC

Download SDF File 
Download CCD File 
A
SUCROSE
C12 H22 O11
CZMRCDWAGMRECN-UGDNZRGBSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
AF
Query on AF

Download SDF File 
Download CCD File 
C
2-AMINOFLUORENE
C13 H11 N
CFRFHWQYWJMEJN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 87.868α = 90.00
b = 93.471β = 90.00
c = 104.656γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
CNSphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-28
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance