6OZG

Crystal structure of Thermotoga maritima (Tm) Endonuclease V (E89Q) in complex with a 12mer DNA containing an inosine followed by a ribo-adenosine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Evolution of Inosine-Specific Endonuclease V from Bacterial DNase to Eukaryotic RNase.

Wu, J.Samara, N.L.Kuraoka, I.Yang, W.

(2019) Mol.Cell 76: 44

  • DOI: 10.1016/j.molcel.2019.06.046
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Endonuclease V (EndoV) cleaves the second phosphodiester bond 3' to a deaminated adenosine (inosine). Although highly conserved, EndoV homologs change substrate preference from DNA in bacteria to RNA in eukaryotes. We have characterized EndoV from si ...

    Endonuclease V (EndoV) cleaves the second phosphodiester bond 3' to a deaminated adenosine (inosine). Although highly conserved, EndoV homologs change substrate preference from DNA in bacteria to RNA in eukaryotes. We have characterized EndoV from six different species and determined crystal structures of human EndoV and three EndoV homologs from bacteria to mouse in complex with inosine-containing DNA/RNA hybrid or double-stranded RNA (dsRNA). Inosine recognition is conserved, but changes in several connecting loops in eukaryotic EndoV confer recognition of 3 ribonucleotides upstream and 7 or 8 bp of dsRNA downstream of the cleavage site, and bacterial EndoV binds only 2 or 3 nt flanking the scissile phosphate. In addition to the two canonical metal ions in the active site, a third Mn 2+ that coordinates the nucleophilic water appears necessary for product formation. Comparison of EndoV with its homologs RNase H1 and Argonaute reveals the principles by which these enzymes recognize RNA versus DNA.


    Organizational Affiliation

    Laboratory of Molecular Biology, NIDDK, NIH, Bethesda, MD 20892, USA.,Laboratory of Molecular Biology, NIDDK, NIH, Bethesda, MD 20892, USA. Electronic address: wei.yang@nih.gov.,Department of Chemistry, Faculty of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan.,Section on Biological Chemistry, NIDCR, NIH, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Endonuclease V
A, B
224Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099)Mutation(s): 1 
Gene Names: nfi
EC: 3.1.21.7
Find proteins for Q9X2H9 (Thermotoga maritima (strain ATCC 43589 / MSB8 / DSM 3109 / JCM 10099))
Go to UniProtKB:  Q9X2H9
Entity ID: 2
MoleculeChainsLengthOrganism
DNA/RNA (5'-D(*AP*AP*TP*GP*A)-R(P*A)-D(P*GP*AP*T)-R(P*NP*N)-D(P*T)-3')C,D12synthetic construct
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

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

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Download CCD File 
B, C
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B, C
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
N
Query on N
C, D
RNA LINKINGC5 H11 O7 P

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.93 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 63.495α = 90.00
b = 82.487β = 90.00
c = 108.569γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
Aimlessdata scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2019-05-15 
  • Released Date: 2019-09-04 
  • Deposition Author(s): Samara, N.L., Yang, W.

Revision History 

  • Version 1.0: 2019-09-04
    Type: Initial release
  • Version 1.1: 2019-10-16
    Type: Data collection, Database references