6OZF

Crystal structure of Thermotoga maritima (Tm) Endonuclease V (D110N) in complex with a 12mer DNA containing an inosine followed by a ribo-adenosine

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

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: https://doi.org/10.1016/j.molcel.2019.06.046
  • Primary Citation of Related Structures:  
    6OZE, 6OZF, 6OZG, 6OZH, 6OZI, 6OZJ, 6OZK, 6OZL, 6OZM, 6OZN, 6OZO, 6OZP, 6OZQ, 6OZR, 6OZS

  • 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 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) ...

    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. Electronic address: wei.yang@nih.gov.



Macromolecules

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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Endonuclease V
A, B
225Thermotoga maritimaMutation(s): 1 
Gene Names: nfi, TM_1865
EC: 3.1.21.7
UniProt
Find proteins for Q9X2H9 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8))
Explore Q9X2H9 
Go to UniProtKB:  Q9X2H9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9X2H9
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
DNA/RNA (5'-D(P*AP*AP*TP*GP*I)-R(P*A)-D(P*GP*AP*TP*GP*CP*T)-3')
C, D
12synthetic construct
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4
Download Ideal Coordinates CCD File 
K [auth B]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
H [auth B],
I [auth B]		GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
J [auth B],
N [auth C]		1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
CA (Subject of Investigation/LOI)
Query on CA
Download Ideal Coordinates CCD File 
E [auth A],
G [auth B],
M [auth C],
O [auth D]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download Ideal Coordinates CCD File 
F [auth A],
L [auth B]		SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.129α = 90
b = 75.578β = 90
c = 106.397γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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