1WLJ

human ISG20


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of human ISG20, an interferon-induced antiviral ribonuclease

Horio, T.Murai, M.Inoue, T.Hamasaki, T.Tanaka, T.Ohgi, T.

(2004) Febs Lett. 577: 111-116

  • DOI: 10.1016/j.febslet.2004.09.074

  • PubMed Abstract: 
  • ISG20 is an interferon-induced antiviral exoribonuclease that acts on single-stranded RNA and also has minor activity towards single-stranded DNA. It belongs to the DEDDh group of RNases of the DEDD exonuclease superfamily. We have solved the crystal ...

    ISG20 is an interferon-induced antiviral exoribonuclease that acts on single-stranded RNA and also has minor activity towards single-stranded DNA. It belongs to the DEDDh group of RNases of the DEDD exonuclease superfamily. We have solved the crystal structure of human ISG20 complexed with two Mn2+ ions and uridine 5'-monophosphate (UMP) at 1.9 A resolution. Its structure, including that of the active site, is very similar to those of the corresponding domains of two DEDDh-group DNases, the epsilon subunit of Escherichia coli DNA polymerase III and E. coli exonuclease I, strongly suggesting that its catalytic mechanism is identical to that of the two DNases. However, ISG20 also has distinctive residues, Met14 and Arg53, to accommodate hydrogen bonds with the 2'-OH group of the UMP ribose, and these residues may be responsible for the preference of ISG20 for RNA substrates.


    Organizational Affiliation

    Research Laboratories, Nippon Shinyaku Co. Ltd, 3-14-1 Sakura, Tsukuba, Ibaraki 305-0003, Japan. t.horio@nippon-shinyaku.co.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
interferon stimulated gene 20kDa
A
189Homo sapiensMutation(s): 0 
Gene Names: ISG20 (HEM45)
EC: 3.1.13.1
Find proteins for Q96AZ6 (Homo sapiens)
Go to Gene View: ISG20
Go to UniProtKB:  Q96AZ6
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
U5P
Query on U5P

Download SDF File 
Download CCD File 
A
URIDINE-5'-MONOPHOSPHATE
C9 H13 N2 O9 P
DJJCXFVJDGTHFX-XVFCMESISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.207 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 63.420α = 90.00
b = 63.420β = 90.00
c = 97.910γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
CNXphasing
HKL-2000data reduction
HKL-2000data scaling
CNXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-12-21
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance