6FLK

Crystal structure of Cep120 C2C domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cep120 promotes microtubule formation through a unique tubulin binding C2 domain.

Sharma, A.Gerard, S.F.Olieric, N.Steinmetz, M.O.

(2018) J. Struct. Biol. 203: 62-70

  • DOI: 10.1016/j.jsb.2018.01.009
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Centrioles are microtubule-based structures that play essential roles in cell division and cilia biogenesis. Cep120 is an important protein for correct centriole formation and mutations in the Cep120 gene cause severe human diseases like Joubert synd ...

    Centrioles are microtubule-based structures that play essential roles in cell division and cilia biogenesis. Cep120 is an important protein for correct centriole formation and mutations in the Cep120 gene cause severe human diseases like Joubert syndrome and complex ciliopathies. Here, we show that Cep120 contains three consecutive C2 domains that are followed by a coiled-coil dimerization domain. Surprisingly, unlike the classical C2 domains, all three Cep120 C2 domains lack calcium- and phospholipid-binding activities. However, biophysical and biochemical assays revealed that the N-terminal Cep120 C2 domain (C2A) binds to both tubulin and microtubules, and promotes microtubule formation. Structural analyses coupled with mutagenesis identified a highly conserved, positively charged residue patch on the surface of Cep120 C2A, which mediates the interaction with tubulin and microtubules. Together, our results establish Cep120 C2A as a unique microtubule-binding domain. They further provide insights into the molecular mechanism of Cep120 during centriole biogenesis.


    Organizational Affiliation

    Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cep120
A, B
163Homo sapiensMutation(s): 0 
Gene Names: CEP120 (CCDC100)
Find proteins for Q8N960 (Homo sapiens)
Go to Gene View: CEP120
Go to UniProtKB:  Q8N960
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.197 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 32.400α = 102.47
b = 40.954β = 98.07
c = 69.132γ = 89.92
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXphasing
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-02-14
    Type: Initial release
  • Version 1.1: 2018-06-06
    Type: Data collection, Database references