3Q0Y

N-terminal domain of C. reinhardtii SAS-6 homolog Bld12p


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of the 9-fold symmetry of centrioles.

Kitagawa, D.Vakonakis, I.Olieric, N.Hilbert, M.Keller, D.Olieric, V.Bortfeld, M.Erat, M.C.Fluckiger, I.Gonczy, P.Steinmetz, M.O.

(2011) Cell 144: 364-375

  • DOI: 10.1016/j.cell.2011.01.008
  • Primary Citation of Related Structures:  
  • Also Cited By: 4U2J, 4TTZ, 4TTX, 4TTW, 4TQ7, 4TPZ, 4TO7

  • PubMed Abstract: 
  • The centriole, and the related basal body, is an ancient organelle characterized by a universal 9-fold radial symmetry and is critical for generating cilia, flagella, and centrosomes. The mechanisms directing centriole formation are incompletely unde ...

    The centriole, and the related basal body, is an ancient organelle characterized by a universal 9-fold radial symmetry and is critical for generating cilia, flagella, and centrosomes. The mechanisms directing centriole formation are incompletely understood and represent a fundamental open question in biology. Here, we demonstrate that the centriolar protein SAS-6 forms rod-shaped homodimers that interact through their N-terminal domains to form oligomers. We establish that such oligomerization is essential for centriole formation in C. elegans and human cells. We further generate a structural model of the related protein Bld12p from C. reinhardtii, in which nine homodimers assemble into a ring from which nine coiled-coil rods radiate outward. Moreover, we demonstrate that recombinant Bld12p self-assembles into structures akin to the central hub of the cartwheel, which serves as a scaffold for centriole formation. Overall, our findings establish a structural basis for the universal 9-fold symmetry of centrioles.


    Organizational Affiliation

    Swiss Institute for Experimental Cancer Research, School of Life Sciences, Swiss Federal Institute of Technology, EPFL, Lausanne, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Centriole protein
A, B, C, D, E, F
161Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: CrSAS-6
Find proteins for A9CQL4 (Chlamydomonas reinhardtii)
Go to UniProtKB:  A9CQL4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 87.650α = 90.00
b = 95.430β = 111.65
c = 92.010γ = 90.00
Software Package:
Software NamePurpose
XSCALEdata scaling
PHENIXrefinement
MOLREPphasing
PDB_EXTRACTdata extraction
XSCALEdata processing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-02-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance