Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.233 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structural and Biochemical Insights to the Role of the Ccr4-not Complex and Ddx6 ATPase in Microrna Repression.

Mathys, H.Basquin, J.Ozgur, S.Czarnocki-Cieciura, M.Bonneau, F.Aartse, A.Dziembowski, A.Nowotny, M.Conti, E.Filipowicz, W.

(2014) Mol Cell 54: 751

  • DOI: https://doi.org/10.1016/j.molcel.2014.03.036
  • Primary Citation of Related Structures:  
    4CT4, 4CT5, 4CT6, 4CT7, 4CV5

  • PubMed Abstract: 

    MicroRNAs (miRNAs) control gene expression by regulating mRNA translation and stability. The CCR4-NOT complex is a key effector of miRNA function acting downstream of GW182/TNRC6 proteins. We show that miRNA-mediated repression requires the central region of CNOT1, the scaffold protein of CCR4-NOT. A CNOT1 domain interacts with CNOT9, which in turn interacts with the silencing domain of TNRC6 in a tryptophan motif-dependent manner. These interactions are direct, as shown by the structure of a CNOT9-CNOT1 complex with bound tryptophan. Another domain of CNOT1 with an MIF4G fold recruits the DEAD-box ATPase DDX6, a known translational inhibitor. Structural and biochemical approaches revealed that CNOT1 modulates the conformation of DDX6 and stimulates ATPase activity. Structure-based mutations showed that the CNOT1 MIF4G-DDX6 interaction is important for miRNA-mediated repression. These findings provide insights into the repressive steps downstream of the GW182/TNRC6 proteins and the role of the CCR4-NOT complex in posttranscriptional regulation in general.

  • Organizational Affiliation

    Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-109 Warsaw, Poland; Faculty of Biology, University of Warsaw, 02-109 Warsaw, Poland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
378Homo sapiensMutation(s): 0 
Gene Names: DDX6HLR2RCK
UniProt & NIH Common Fund Data Resources
Find proteins for P26196 (Homo sapiens)
Explore P26196 
Go to UniProtKB:  P26196
PHAROS:  P26196
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26196
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.231 
  • R-Value Observed: 0.233 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.116α = 90
b = 113.144β = 90
c = 77.183γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-07
    Type: Initial release
  • Version 1.1: 2014-05-28
    Changes: Atomic model
  • Version 1.2: 2014-06-18
    Changes: Database references