3NAE

RB69 DNA Polymerase (Y567A) Ternary Complex with dATP Opposite Guanidinohydantoin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.003 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Substitution of Ala for Tyr567 in RB69 DNA Polymerase Allows dAMP and dGMP To Be Inserted opposite Guanidinohydantoin .

Beckman, J.Wang, M.Blaha, G.Wang, J.Konigsberg, W.H.

(2010) Biochemistry 49: 8554-8563

  • DOI: 10.1021/bi100913v

  • PubMed Abstract: 
  • Continuous oxidative damage inflicted on DNA produces 7,8-dihydro-8-oxoguanine (8-oxoG), a commonly occurring lesion that can potentially cause cancer by producing G → T transversions during DNA replication. Mild oxidation of 8-oxoG leads to the form ...

    Continuous oxidative damage inflicted on DNA produces 7,8-dihydro-8-oxoguanine (8-oxoG), a commonly occurring lesion that can potentially cause cancer by producing G → T transversions during DNA replication. Mild oxidation of 8-oxoG leads to the formation of hydantoins, specifically guanidinohydantoin (Gh) and spiroiminodihydantoin (Sp), which are 100% mutagenic because they encode almost exclusively the insertion of dAMP and dGMP (encoding G → T and G → C transversions, respectively). The wild-type (wt) pol α family DNA polymerase from bacteriophage RB69 (RB69pol) inserts dAMP and dGMP with low efficiency when situated opposite Gh. In contrast, the RB69pol Y567A mutant inserts both of these dNMPs opposite Gh with >100-fold higher efficiency than wt. We now report the crystal structure of the "closed" preinsertion complex for the Y567A mutant with dATP opposite a templating Gh (R-configuration) in a 13/18mer primer-template (P/T) at 2.0 Å resolution. The structure data reveal that the Y to A substitution provides the nascent base pair binding pocket (NBP) with the flexibility to accommodate Gh by allowing G568 to move in the major-to-minor groove direction of the P/T. Thus, Gh is rejected as a templating base by wt RB69pol because G568 is inflexible, preventing Gh from pairing with the incoming dATP or dGTP base.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520-8024, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase
A
903Enterobacteria phage RB69Mutation(s): 3 
Gene Names: 43
EC: 2.7.7.7, 3.1.11.-
Find proteins for Q38087 (Enterobacteria phage RB69)
Go to UniProtKB:  Q38087
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*TP*CP*AP*(G35)P*GP*TP*AP*AP*GP*CP*AP*GP*TP*CP*CP*GP*CP*G)-3')T18N/A
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*CP*GP*GP*AP*CP*TP*GP*CP*TP*TP*AP*(DOC))-3')P13N/A
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DTP
Query on DTP

Download SDF File 
Download CCD File 
A
2'-DEOXYADENOSINE 5'-TRIPHOSPHATE
C10 H16 N5 O12 P3
SUYVUBYJARFZHO-RRKCRQDMSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
DOC
Query on DOC
P
DNA LINKINGC9 H14 N3 O6 PDC
G35
Query on G35
T
DNA linkingC9 H16 N5 O8 P

--

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.003 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 75.013α = 90.00
b = 119.783β = 90.00
c = 130.727γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
HKL-2000data scaling
HKL-2000data reduction
HKL-2000data collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance