3JPN

Ternary complex of DNA polymerase beta with a dideoxy terminated primer and 2'-deoxyguanosine 5'-beta, gamma-dichloro methylene triphosphate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Halogenated beta,gamma-Methylene- and Ethylidene-dGTP-DNA Ternary Complexes with DNA Polymerase beta: Structural Evidence for Stereospecific Binding of the Fluoromethylene Analogues.

Batra, V.K.Pedersen, L.C.Beard, W.A.Wilson, S.H.Kashemirov, B.A.Upton, T.G.Goodman, M.F.McKenna, C.E.

(2010) J Am Chem Soc 132: 7617-7625

  • DOI: https://doi.org/10.1021/ja909370k
  • Primary Citation of Related Structures:  
    3JPN, 3JPO, 3JPP, 3JPQ, 3JPR, 3JPS, 3JPT

  • PubMed Abstract: 

    Beta,gamma-fluoromethylene analogues of nucleotides are considered to be useful mimics of the natural substrates, but direct structural evidence defining their active site interactions has not been available, including the influence of the new chiral center introduced at the CHF carbon, as in beta,gamma-fluoromethylene-dGTP, which forms an active site complex with DNA polymerase beta, a repair enzyme that plays an important role in base excision repair (BER) and oncogenesis. We report X-ray crystallographic results for a series of beta,gamma-CXY dGTP analogues, where X,Y = H, F, Cl, Br, and/or CH(3). For all three R/S monofluorinated analogues examined (CHF, 3/4; CCH(3)F, 13/14; CClF 15/16), a single CXF-diastereomer (3, 13, 16) is observed in the active site complex, with the CXF fluorine atom at a approximately 3 A (bonding) distance to a guanidinium N of Arg183. In contrast, for the CHCl, CHBr, and CHCH(3) analogues, both diasteromers (6/7, 8/9, 10/11) populate the dGTP site in the enzyme complex about equally. The structures of the bound dichloro (5) and dimethyl (12) analogue complexes indicate little to no steric effect on the placement of the bound nucleotide backbone. The results suggest that introduction of a single fluorine atom at the beta,gamma-bridging carbon atom of these dNTP analogues enables a new, stereospecific interaction within the preorganized active site complex that is unique to fluorine. The results also provide the first diverse structural data set permitting an assessment of how closely this class of dNTP analogues mimics the conformation of the parent nucleotide within the active site complex.


  • Organizational Affiliation

    Laboratory of Structural Biology, NIEHS, National Institutes of Health DHHS, Research Triangle Park, North Carolina 27709, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA polymerase beta335Homo sapiensMutation(s): 0 
Gene Names: POLB
EC: 2.7.7.7 (PDB Primary Data), 4.2.99.18 (UniProt), 4.2.99 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P06746 (Homo sapiens)
Explore P06746 
Go to UniProtKB:  P06746
PHAROS:  P06746
GTEx:  ENSG00000070501 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06746
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains LengthOrganismImage
5'-D(P*GP*TP*CP*GP*G)-3'B [auth D]5N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
5'-D(*GP*CP*TP*GP*AP*TP*GP*CP*GP*(DOC))-3'C [auth P]10N/A
Sequence Annotations
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  • Reference Sequence

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Entity ID: 4
MoleculeChains LengthOrganismImage
5'-D(*CP*CP*GP*AP*CP*CP*GP*CP*GP*CP*AP*TP*CP*AP*GP*C)-3'D [auth T]16N/A
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.190 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.65α = 90
b = 80.11β = 107.93
c = 55.48γ = 90
Software Package:
Software NamePurpose
StructureStudiodata collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-06-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description