4UZZ

Crystal structure of the TtIFT52-46 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 

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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:  
    4UZY, 4UZZ

  • 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 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 ...

    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

    Department of Structural Cell Biology, Max-Planck-Institute of Biochemistry, D-82152 Martinsried, Germany lorentze@biochem.mpg.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
INTRAFLAGELLAR TRANSPORT COMPLEX B PROTEIN 46 CARBOXY-TERMINAL PROTEIN A116Tetrahymena thermophilaMutation(s): 0 
Find proteins for Q23KH7 (Tetrahymena thermophila (strain SB210))
Explore Q23KH7 
Go to UniProtKB:  Q23KH7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INTRAFLAGELLAR TRANSPORTER-LIKE PROTEIN B68Tetrahymena thermophilaMutation(s): 0 
Find proteins for I7LT74 (Tetrahymena thermophila (strain SB210))
Explore I7LT74 
Go to UniProtKB:  I7LT74
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.32 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.394α = 90
b = 84.394β = 90
c = 95.477γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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