3OJU

Snapshot of the large fragment of DNA polymerase I from Thermus Aquaticus processing c5 modified thymidies


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for the synthesis of nucleobase modified DNA by Thermus aquaticus DNA polymerase.

Obeid, S.Baccaro, A.Welte, W.Diederichs, K.Marx, A.

(2010) Proc.Natl.Acad.Sci.USA 107: 21327-21331

  • DOI: 10.1073/pnas.1013804107
  • Primary Citation of Related Structures:  3OJS

  • PubMed Abstract: 
  • Numerous 2'-deoxynucleoside triphosphates (dNTPs) that are functionalized with spacious modifications such as dyes and affinity tags like biotin are substrates for DNA polymerases. They are widely employed in many cutting-edge technologies like advan ...

    Numerous 2'-deoxynucleoside triphosphates (dNTPs) that are functionalized with spacious modifications such as dyes and affinity tags like biotin are substrates for DNA polymerases. They are widely employed in many cutting-edge technologies like advanced DNA sequencing approaches, microarrays, and single molecule techniques. Modifications attached to the nucleobase are accepted by many DNA polymerases, and thus, dNTPs bearing nucleobase modifications are predominantly employed. When pyrimidines are used the modifications are almost exclusively at the C5 position to avoid disturbing of Watson-Crick base pairing ability. However, the detailed molecular mechanism by which C5 modifications are processed by a DNA polymerase is poorly understood. Here, we present the first crystal structures of a DNA polymerase from Thermus aquaticus processing two C5 modified substrates that are accepted by the enzyme with different efficiencies. The structures were obtained as ternary complex of the enzyme bound to primer/template duplex with the respective modified dNTP in position poised for catalysis leading to incorporation. Thus, the study provides insights into the incorporation mechanism of the modified nucleotides elucidating how bulky modifications are accepted by the enzyme. The structures show a varied degree of perturbation of the enzyme substrate complexes depending on the nature of the modifications suggesting design principles for future developments of modified substrates for DNA polymerases.


    Organizational Affiliation

    Department of Chemistry, Konstanz Research School Chemical Biology, University of Konstanz, Universitätsstrasse 10, D 78457 Konstanz, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase I, thermostable
A
540Thermus aquaticusGene Names: polA (pol1)
EC: 2.7.7.7
Find proteins for P19821 (Thermus aquaticus)
Go to UniProtKB:  P19821
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*GP*AP*CP*CP*AP*CP*GP*GP*CP*GP*CP*(DOC))-3')B12N/A
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*AP*AP*AP*GP*GP*CP*GP*CP*CP*GP*TP*GP*GP*TP*C)-3')C16N/A
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
SSJ
Query on SSJ

Download SDF File 
Download CCD File 
A
2'-deoxy-5-[(1-hydroxy-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)ethynyl]uridine 5'-(tetrahydrogen triphosphate)
C19 H28 N3 O15 P3
GHJOELBEPYPBAG-RRFJBIMHSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download SDF File 
Download CCD File 
A, C
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
DOC
Query on DOC
B
DNA LINKINGC9 H14 N3 O6 PDC
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.177 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 109.022α = 90.00
b = 109.022β = 90.00
c = 91.473γ = 120.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2013-03-27
    Type: Database references
  • Version 1.3: 2017-11-08
    Type: Refinement description