3X1O

Crystal structure of the ROQ domain of human Roquin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.201 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Roquin binds microRNA-146a and Argonaute2 to regulate microRNA homeostasis

Srivastava, M.Duan, G.Kershaw, N.J.Athanasopoulos, V.Yeo, J.H.Ose, T.Hu, D.Brown, S.H.J.Jergic, S.Patel, H.R.Pratama, A.Richards, S.Verma, A.Jones, E.Y.Heissmeyer, V.Preiss, T.Dixon, N.E.Chong, M.M.W.Babon, J.J.Vinuesa, C.G.

(2015) Nat Commun 6: 6253-6253

  • DOI: 10.1038/ncomms7253

  • PubMed Abstract: 
  • Roquin is an RNA-binding protein that prevents autoimmunity and inflammation via repression of bound target mRNAs such as inducible costimulator (Icos). When Roquin is absent or mutated (Roquin(san)), Icos is overexpressed in T cells. Here we show th ...

    Roquin is an RNA-binding protein that prevents autoimmunity and inflammation via repression of bound target mRNAs such as inducible costimulator (Icos). When Roquin is absent or mutated (Roquin(san)), Icos is overexpressed in T cells. Here we show that Roquin enhances Dicer-mediated processing of pre-miR-146a. Roquin also directly binds Argonaute2, a central component of the RNA-induced silencing complex, and miR-146a, a microRNA that targets Icos mRNA. In the absence of functional Roquin, miR-146a accumulates in T cells. Its accumulation is not due to increased transcription or processing, rather due to enhanced stability of mature miR-146a. This is associated with decreased 3' end uridylation of the miRNA. Crystallographic studies reveal that Roquin contains a unique HEPN domain and identify the structural basis of the 'san' mutation and Roquin's ability to bind multiple RNAs. Roquin emerges as a protein that can bind Ago2, miRNAs and target mRNAs, to control homeostasis of both RNA species.


    Organizational Affiliation

    Department of Pathogens and Immunity, John Curtin School of Medical Research, Canberra, Australian Capital Territory 2601, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Roquin-1
A, B
208Homo sapiensMutation(s): 0 
Gene Names: RC3H1 (KIAA2025, RNF198)
EC: 2.3.2.27
Find proteins for Q5TC82 (Homo sapiens)
Go to Gene View: RC3H1
Go to UniProtKB:  Q5TC82
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A, B
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.201 Å
  • R-Value Free: 0.252 
  • R-Value Work: 0.217 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 55.003α = 90.00
b = 78.322β = 90.00
c = 184.075γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
PHENIXrefinement
HKL-2000data reduction
SOLVEphasing
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-03-11
    Type: Initial release