1S10

Snapshots of replication through an abasic lesion: structural basis for base substitution and frameshift

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

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Literature

Snapshots of Replication through an Abasic Lesion; Structural Basis for Base Substitutions and Frameshifts.

Ling, H., Boudsocq, F., Woodgate, R., Yang, W.

(2004) Mol Cell 13: 751-762

  • DOI: 10.1016/s1097-2765(04)00101-7
  • Primary Citation of Related Structures:  
    1N56, 1S0N, 1S0O, 1S10

  • PubMed Abstract: 

    • Dpo4 from S. Solfataricus, a DinB-like Y family polymerase, efficiently replicates DNA past an abasic lesion. We have determined crystal structures of Dpo4 complexed with five different abasic site-containing DNA substrates and find that translesion synthesis is template directed with the abasic site looped out and the incoming nucleotide is opposite the base 5' to the lesion ...

    Dpo4 from S. Solfataricus, a DinB-like Y family polymerase, efficiently replicates DNA past an abasic lesion. We have determined crystal structures of Dpo4 complexed with five different abasic site-containing DNA substrates and find that translesion synthesis is template directed with the abasic site looped out and the incoming nucleotide is opposite the base 5' to the lesion. The ensuing DNA synthesis generates a -1 frameshift when the abasic site remains extrahelical. Template realignment during primer extension is also observed, resulting in base substitutions or even +1 frameshifts. In the case of a +1 frameshift, the extra nucleotide is accommodated in the solvent-exposed minor groove. In addition, the structure of an unproductive Dpo4 ternary complex suggests that the flexible little finger domain facilitates DNA orientation and translocation during translesion synthesis.

    Organizational Affiliation: 

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892, USA.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA polymerase IVC [auth A]352Saccharolobus solfataricus P2Mutation(s): 0 
Gene Names: dpo4, dbh, SSO2448
EC: 2.7.7.7
UniProt
Find proteins for Q97W02 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q97W02 
Go to UniProtKB:  Q97W02
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ97W02
Protein Feature View
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganismImage
5'-D(*GP*GP*GP*GP*GP*AP*AP*GP*GP*AP*CP*TP*A)-3'A [auth B]13N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*TP*CP*AP*GP*TP*AP*GP*TP*CP*CP*TP*TP*CP*CP*CP*CP*C)-3'B [auth C]17N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DCP
Query on DCP
Download Ideal Coordinates CCD File 
F [auth A]2'-DEOXYCYTIDINE-5'-TRIPHOSPHATE
C9 H16 N3 O13 P3
RGWHQCVHVJXOKC-SHYZEUOFSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
D [auth A],
E [auth A]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.395α = 90
b = 102.664β = 90
c = 52.34γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-03-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Source and taxonomy, Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection