1PJI

Crystal structure of wild type Lactococcus lactis FPG complexed to a 1,3 propanediol containing DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.210 

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This is version 1.2 of the entry. See complete history


Literature

Structural insights into abasic site for Fpg specific binding and catalysis: comparative high-resolution crystallographic studies of Fpg bound to various models of abasic site analogues-containing DNA.

Pereira de Jesus, K.Serre, L.Zelwer, C.Castaing, B.

(2005) Nucleic Acids Res 33: 5936-5944

  • DOI: 10.1093/nar/gki879
  • Primary Citation of Related Structures:  
    1NNJ, 1PJI, 1PJJ, 1PM5

  • PubMed Abstract: 
  • Fpg is a DNA glycosylase that recognizes and excises the mutagenic 8-oxoguanine (8-oxoG) and the potentially lethal formamidopyrimidic residues (Fapy). Fpg is also associated with an AP lyase activity which successively cleaves the abasic (AP) site at the 3' and 5' sides by betadelta-elimination ...

    Fpg is a DNA glycosylase that recognizes and excises the mutagenic 8-oxoguanine (8-oxoG) and the potentially lethal formamidopyrimidic residues (Fapy). Fpg is also associated with an AP lyase activity which successively cleaves the abasic (AP) site at the 3' and 5' sides by betadelta-elimination. Here, we present the high-resolution crystal structures of the wild-type and the P1G defective mutant of Fpg from Lactococcus lactis bound to 14mer DNA duplexes containing either a tetrahydrofuran (THF) or 1,3-propanediol (Pr) AP site analogues. Structures show that THF is less extrahelical than Pr and its backbone C5'-C4'-C3' diverges significantly from those of Pr, rAP, 8-oxodG and FapydG. Clearly, the heterocyclic oxygen of THF is pushed back by the carboxylate of the strictly conserved E2 residue. We can propose that the ring-opened form of the damaged deoxyribose is the structure active form of the sugar for Fpg catalysis process. Both structural and functional data suggest that the first step of catalysis mediated by Fpg involves the expulsion of the O4' leaving group facilitated by general acid catalysis (involving E2), rather than the immediate cleavage of the N-glycosic bond of the damaged nucleoside.


    Related Citations: 
    • crystal structure of the lactococcus lactis FPG bound to an abasic site analogue containing DNA
      (2002) EMBO J 21: 2854

    Organizational Affiliation

    Centre de Biophysique Moléculaire, CNRS rue Charles Sadron, 45071 Orléans cedex 02, France.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Formamidopyrimidine-DNA glycosylaseC [auth A]271Lactococcus cremorisMutation(s): 0 
Gene Names: MUTM OR FPGmutMfpg
EC: 3.2.2.23 (PDB Primary Data), 4.2.99.18 (UniProt)
UniProt
Find proteins for P42371 (Lactococcus lactis subsp. cremoris)
Explore P42371 
Go to UniProtKB:  P42371
Protein Feature View
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  • Reference Sequence
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  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    DNA (5'-D(*CP*TP*CP*TP*TP*TP*(PDI)P*TP*TP*TP*CP*TP*CP*G)-3')A [auth D]14N/A
    Protein Feature View
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    • Reference Sequence
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    • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      DNA (5'-D(*GP*CP*GP*AP*GP*AP*AP*AP*CP*AP*AP*AP*GP*A)-3')B [auth E]14N/A
      Protein Feature View
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      • Reference Sequence
      Small Molecules
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 1.90 Å
      • R-Value Free: 0.237 
      • R-Value Work: 0.210 
      • Space Group: P 41 21 2
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 91.955α = 90
      b = 91.955β = 90
      c = 142.076γ = 90
      Software Package:
      Software NamePurpose
      DENZOdata reduction
      SCALEPACKdata scaling
      AMoREphasing
      CNSrefinement

      Structure Validation

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      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

      • Version 1.0: 2004-08-03
        Type: Initial release
      • Version 1.1: 2008-04-29
        Changes: Version format compliance
      • Version 1.2: 2011-07-13
        Changes: Non-polymer description, Version format compliance