4G1T

Crystal structure of interferon-stimulated gene 54


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal structure of ISG54 reveals a novel RNA binding structure and potential functional mechanisms.

Yang, Z.Liang, H.Zhou, Q.Li, Y.Chen, H.Ye, W.Chen, D.Fleming, J.Shu, H.Liu, Y.

(2012) Cell Res. --: --

  • DOI: 10.1038/cr.2012.111

  • PubMed Abstract: 
  • Interferon-stimulated gene 56 (ISG56) family members play important roles in blocking viral replication and regulating cellular functions, however, their underlying molecular mechanisms are largely unclear. Here, we present the crystal structure of I ...

    Interferon-stimulated gene 56 (ISG56) family members play important roles in blocking viral replication and regulating cellular functions, however, their underlying molecular mechanisms are largely unclear. Here, we present the crystal structure of ISG54, an ISG56 family protein with a novel RNA-binding structure. The structure shows that ISG54 monomers have 9 tetratricopeptide repeat-like motifs and associate to form domain-swapped dimers. The C-terminal part folds into a super-helical structure and has an extensively positively-charged nucleotide-binding channel on its inner surface. EMSA results show that ISG54 binds specifically to some RNAs, such as adenylate uridylate (AU)-rich RNAs, with or without 5' triphosphorylation. Mutagenesis and functional studies show that this RNA-binding ability is important to its antiviral activity. Our results suggest a new mechanism underlying the antiviral activity of this interferon-inducible gene 56 family member.


    Organizational Affiliation

    State Key Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Interferon-induced protein with tetratricopeptide repeats 2
A, B
472Homo sapiensMutation(s): 0 
Gene Names: IFIT2 (CIG-42, G10P2, IFI54, ISG54)
Find proteins for P09913 (Homo sapiens)
Go to Gene View: IFIT2
Go to UniProtKB:  P09913
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.287 
  • R-Value Work: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 80.023α = 90.00
b = 95.207β = 90.00
c = 155.900γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data collection
SHELXSphasing
PHENIXrefinement
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-15
    Type: Initial release