1TDH

Crystal structure of human endonuclease VIII-like 1 (NEIL1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The crystal structure of human endonuclease VIII-like 1 (NEIL1) reveals a zincless finger motif required for glycosylase activity.

Doublie, S.Bandaru, V.Bond, J.P.Wallace, S.S.

(2004) Proc.Natl.Acad.Sci.USA 101: 10284-10289

  • DOI: 10.1073/pnas.0402051101

  • PubMed Abstract: 
  • In prokaryotes, two DNA glycosylases recognize and excise oxidized pyrimidines: endonuclease III (Nth) and endonuclease VIII (Nei). The oxidized purine 8-oxoguanine, on the other hand, is recognized by Fpg (also known as MutM), a glycosylase that bel ...

    In prokaryotes, two DNA glycosylases recognize and excise oxidized pyrimidines: endonuclease III (Nth) and endonuclease VIII (Nei). The oxidized purine 8-oxoguanine, on the other hand, is recognized by Fpg (also known as MutM), a glycosylase that belongs to the same family as Nei. The recent availability of the human genome sequence allowed the identification of three human homologs of Escherichia coli Nei. We report here the crystal structure of a human Nei-like (NEIL) enzyme, NEIL1. The structure of NEIL1 exhibits the same overall fold as E. coli Nei, albeit with an unexpected twist. Sequence alignments had predicted that NEIL1 would lack a zinc finger, and it was therefore expected to use a different DNA-binding motif instead. Our structure revealed that, to the contrary, NEIL1 contains a structural motif composed of two antiparallel beta-strands that mimics the antiparallel beta-hairpin zinc finger found in other Fpg/Nei family members but lacks the loops that harbor the zinc-binding residues and, therefore, does not coordinate zinc. This "zincless finger" appears to be required for NEIL1 activity, because mutating a very highly conserved arginine within this motif greatly reduces the glycosylase activity of the enzyme.


    Organizational Affiliation

    Department of Microbiology and Molecular Genetics, The Markey Center for Molecular Genetics, University of Vermont, Stafford Hall, 95 Carrigan Drive, Burlington, VT 05405-0068, USA. sdoublie@uvm.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
nei endonuclease VIII-like 1
A
364Homo sapiensMutation(s): 0 
Gene Names: NEIL1
EC: 3.2.2.-, 4.2.99.18
Find proteins for Q96FI4 (Homo sapiens)
Go to Gene View: NEIL1
Go to UniProtKB:  Q96FI4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TRS
Query on TRS

Download SDF File 
Download CCD File 
A
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
TRIS BUFFER
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.194 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 132.190α = 90.00
b = 132.190β = 90.00
c = 51.090γ = 120.00
Software Package:
Software NamePurpose
SOLVEphasing
CNSrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance