5N4A

Crystal structure of Chlamydomonas IFT80


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 

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This is version 1.1 of the entry. See complete history


Literature

Crystal structure of intraflagellar transport protein 80 reveals a homo-dimer required for ciliogenesis.

Taschner, M.Lorentzen, A.Mourao, A.Collins, T.Freke, G.M.Moulding, D.Basquin, J.Jenkins, D.Lorentzen, E.

(2018) Elife 7

  • DOI: 10.7554/eLife.33067
  • Primary Citation of Related Structures:  
    5N4A

  • PubMed Abstract: 
  • Oligomeric assemblies of intraflagellar transport (IFT) particles build cilia through sequential recruitment and transport of ciliary cargo proteins within cilia. Here we present the 1.8 Å resolution crystal structure of the Chlamydomonas IFT-B protein IFT80, which reveals the architecture of two N-terminal β-propellers followed by an α-helical extension ...

    Oligomeric assemblies of intraflagellar transport (IFT) particles build cilia through sequential recruitment and transport of ciliary cargo proteins within cilia. Here we present the 1.8 Å resolution crystal structure of the Chlamydomonas IFT-B protein IFT80, which reveals the architecture of two N-terminal β-propellers followed by an α-helical extension. The N-terminal β-propeller tethers IFT80 to the IFT-B complex via IFT38 whereas the second β-propeller and the C-terminal α-helical extension result in IFT80 homo-dimerization. Using CRISPR/Cas to create biallelic Ift80 frameshift mutations in IMCD3 mouse cells, we demonstrate that IFT80 is absolutely required for ciliogenesis. Structural mapping and rescue experiments reveal that human disease-causing missense mutations do not cluster within IFT80 and form functional IFT particles. Unlike missense mutant forms of IFT80, deletion of the C-terminal dimerization domain prevented rescue of ciliogenesis. Taken together our results may provide a first insight into higher order IFT complex formation likely required for IFT train formation.


    Organizational Affiliation

    Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Intraflagellar transport protein 80A771Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: CHLRE_03g204150v5
UniProt
Find proteins for A5Z0S9 (Chlamydomonas reinhardtii)
Explore A5Z0S9 
Go to UniProtKB:  A5Z0S9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA5Z0S9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.175 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.778α = 90
b = 195.403β = 90
c = 117.455γ = 90
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: 2018-02-28
    Type: Initial release
  • Version 1.1: 2019-03-13
    Changes: Data collection, Database references