4UZZ

Crystal structure of the TtIFT52-46 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.318 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal Structures of Ift70/52 and Ift52/46 Provide Insight Into Intraflagellar Transport B Core Complex Assembly.

Taschner, M.Kotsis, F.Braeuer, P.Kuehn, E.W.Lorentzen, E.

(2014) J.Cell Biol. 207: 269

  • DOI: 10.1083/jcb.201408002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cilia are microtubule-based organelles that assemble via intraflagellar transport (IFT) and function as signaling hubs on eukaryotic cells. IFT relies on molecular motors and IFT complexes that mediate the contacts with ciliary cargo. To elucidate th ...

    Cilia are microtubule-based organelles that assemble via intraflagellar transport (IFT) and function as signaling hubs on eukaryotic cells. IFT relies on molecular motors and IFT complexes that mediate the contacts with ciliary cargo. To elucidate the architecture of the IFT-B complex, we reconstituted and purified the nonameric IFT-B core from Chlamydomonas reinhardtii and determined the crystal structures of C. reinhardtii IFT70/52 and Tetrahymena IFT52/46 subcomplexes. The 2.5-Å resolution IFT70/52 structure shows that IFT52330-370 is buried deeply within the IFT70 tetratricopeptide repeat superhelix. Furthermore, the polycystic kidney disease protein IFT88 binds IFT52281-329 in a complex that interacts directly with IFT70/IFT52330-381 in trans. The structure of IFT52C/IFT46C was solved at 2.3 Å resolution, and we show that it is essential for IFT-B core integrity by mediating interaction between IFT88/70/52/46 and IFT81/74/27/25/22 subcomplexes. Consistent with this, overexpression of mammalian IFT52C in MDCK cells is dominant-negative and causes IFT protein mislocalization and disrupted ciliogenesis. These data further rationalize several ciliogenesis phenotypes of IFT mutant strains.


    Organizational Affiliation

    Renal Division, University Hospital Freiburg, D-79106 Freiburg, Germany.,Department of Structural Cell Biology, Max-Planck-Institute of Biochemistry, D-82152 Martinsried, Germany.,Renal Division, University Hospital Freiburg, D-79106 Freiburg, Germany BIOSS Center for Biological Signaling Studies, Albert-Ludwig-University, 79104 Freiburg, Germany.,Department of Structural Cell Biology, Max-Planck-Institute of Biochemistry, D-82152 Martinsried, Germany lorentze@biochem.mpg.de.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTRAFLAGELLAR TRANSPORT COMPLEX B PROTEIN 46 CARBOXY-TERMINAL PROTEIN
A
116Tetrahymena thermophila (strain SB210)Mutation(s): 0 
Find proteins for Q23KH7 (Tetrahymena thermophila (strain SB210))
Go to UniProtKB:  Q23KH7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
INTRAFLAGELLAR TRANSPORTER-LIKE PROTEIN
B
68Tetrahymena thermophila (strain SB210)Mutation(s): 0 
Find proteins for I7LT74 (Tetrahymena thermophila (strain SB210))
Go to UniProtKB:  I7LT74
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.318 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 84.394α = 90.00
b = 84.394β = 90.00
c = 95.477γ = 120.00
Software Package:
Software NamePurpose
PHENIXphasing
XDSdata reduction
Aimlessdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-05
    Type: Initial release