8HMF

head module state 2 of Tetrahymena IFT-A


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural insight into the intraflagellar transport complex IFT-A and its assembly in the anterograde IFT train.

Ma, Y.He, J.Li, S.Yao, D.Huang, C.Wu, J.Lei, M.

(2023) Nat Commun 14: 1506-1506

  • DOI: https://doi.org/10.1038/s41467-023-37208-2
  • Primary Citation of Related Structures:  
    8HMC, 8HMD, 8HME, 8HMF

  • PubMed Abstract: 

    Intraflagellar transport (IFT) trains, the polymers composed of two multi-subunit complexes, IFT-A and IFT-B, carry out bidirectional intracellular transport in cilia, vital for cilia biogenesis and signaling. IFT-A plays crucial roles in the ciliary import of membrane proteins and the retrograde cargo trafficking. However, the molecular architecture of IFT-A and the assembly mechanism of the IFT-A into the IFT trains in vivo remains elusive. Here, we report the cryo-electron microscopic structures of the IFT-A complex from protozoa Tetrahymena thermophila. We find that IFT-A complexes present two distinct, elongated and folded states. Remarkably, comparison with the in situ cryo-electron tomography structure of the anterograde IFT train unveils a series of adjustments of the flexible arms in apo IFT-A when incorporated into the anterograde train. Our results provide an atomic-resolution model for the IFT-A complex and valuable insights into the assembly mechanism of anterograde IFT trains.


  • Organizational Affiliation

    Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Intraflagellar transport protein 122 homolog1,251Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for Q244W3 (Tetrahymena thermophila (strain SB210))
Explore Q244W3 
Go to UniProtKB:  Q244W3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ244W3
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Intraflagellar transporterB [auth D]1,407Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for I7LVZ7 (Tetrahymena thermophila (strain SB210))
Explore I7LVZ7 
Go to UniProtKB:  I7LVZ7
Entity Groups  
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UniProt GroupI7LVZ7
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
WD40 repeat proteinC [auth E]1,387Tetrahymena thermophilaMutation(s): 0 
UniProt
Find proteins for Q22BP2 (Tetrahymena thermophila (strain SB210))
Explore Q22BP2 
Go to UniProtKB:  Q22BP2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ22BP2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2023-06-14
    Type: Initial release
  • Version 1.1: 2024-07-03
    Changes: Data collection, Other