2D5R

Crystal Structure of a Tob-hCaf1 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for the antiproliferative activity of the Tob-hCaf1 complex.

Horiuchi, M.Takeuchi, K.Noda, N.Muroya, N.Suzuki, T.Nakamura, T.Kawamura-Tsuzuku, J.Takahasi, K.Yamamoto, T.Inagaki, F.

(2009) J.Biol.Chem. 284: 13244-13255

  • DOI: 10.1074/jbc.M809250200

  • PubMed Abstract: 
  • The Tob/BTG family is a group of antiproliferative proteins containing two highly homologous regions, Box A and Box B. These proteins all associate with CCR4-associated factor 1 (Caf1), which belongs to the ribonuclease D (RNase D) family of deadenyl ...

    The Tob/BTG family is a group of antiproliferative proteins containing two highly homologous regions, Box A and Box B. These proteins all associate with CCR4-associated factor 1 (Caf1), which belongs to the ribonuclease D (RNase D) family of deadenylases and is a component of the CCR4-Not deadenylase complex. Here we determined the crystal structure of the complex of the N-terminal region of Tob and human Caf1 (hCaf1). Tob exhibited a novel fold, whereas hCaf1 most closely resembled the catalytic domain of yeast Pop2 and human poly(A)-specific ribonuclease. Interestingly, the association of hCaf1 was mediated by both Box A and Box B of Tob. Cell growth assays using both wild-type and mutant proteins revealed that deadenylase activity of Caf1 is not critical but complex formation is crucial to cell growth inhibition. Caf1 tethers Tob to the CCR4-Not deadenylase complex, and thereby Tob gathers several factors at its C-terminal region, such as poly(A)-binding proteins, to exert antiproliferative activity.


    Organizational Affiliation

    Department of Structural Biology, Graduate School of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CCR4-NOT transcription complex subunit 7
A
252Homo sapiensMutation(s): 0 
Gene Names: CNOT7 (CAF1)
EC: 3.1.13.4
Find proteins for Q9UIV1 (Homo sapiens)
Go to Gene View: CNOT7
Go to UniProtKB:  Q9UIV1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tob1 protein
B
116Homo sapiensMutation(s): 0 
Gene Names: TOB1 (TOB, TROB1)
Find proteins for P50616 (Homo sapiens)
Go to Gene View: TOB1
Go to UniProtKB:  P50616
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.223 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 151.505α = 90.00
b = 151.505β = 90.00
c = 114.181γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CNSphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-12-12
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance