Crystal structure of human ODA16

Experimental Data Snapshot

  • Resolution: 2.65 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 

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Purification and crystal structure of human ODA16: Implications for ciliary import of outer dynein arms by the intraflagellar transport machinery.

Wang, J.Taschner, M.Petriman, N.A.Andersen, M.B.Basquin, J.Bhogaraju, S.Vetter, M.Wachter, S.Lorentzen, A.Lorentzen, E.

(2020) Protein Sci 29: 1502-1510

  • DOI: https://doi.org/10.1002/pro.3864
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Motile cilia protrude from cell surfaces and are necessary to create movement of cells and fluids in the body. At the molecular level, cilia contain several dynein molecular motor complexes including outer dynein arms (ODAs) that are attached periodically to the ciliary axoneme, where they hydrolyse ATP to create the force required for bending and motility of the cilium. ODAs are preassembled in the cytoplasm and subsequently trafficked into the cilium by the intraflagellar transport (IFT) system. In the case of the green alga Chlamydomonas reinhardtii, the adaptor protein ODA16 binds to ODAs and directly to the IFT complex component IFT46 to facilitate the ciliary import of ODAs. Here, we purified recombinant human IFT46 and ODA16, determined the high-resolution crystal structure of the ODA16 protein, and carried out direct interaction studies of IFT46 and ODA16. The human ODA16 C-terminal 320 residues adopt the fold of an eight-bladed β-propeller with high overall structural similarity to the Chlamydomonas ODA16. However, the small 80 residue N-terminal domain, which in Chlamydomonas ODA16 is located on top of the β-propeller and is required to form the binding cleft for IFT46, has no visible electron density in case of the human ODA16 structure. Furthermore, size exclusion chromatography and pull-down experiments failed to detect a direct interaction between human ODA16 and IFT46. These data suggest that additional factors may be required for the ciliary import of ODAs in human cells with motile cilia.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein assembly factor with WDR repeat domains 1A [auth B],
B [auth A]
415Homo sapiensMutation(s): 0 
Gene Names: DAW1WDR69
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N136 (Homo sapiens)
Explore Q8N136 
Go to UniProtKB:  Q8N136
GTEx:  ENSG00000123977 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8N136
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.65 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.230 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.15α = 90
b = 69.5β = 90.01
c = 102.15γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-06-07
    Type: Initial release
  • Version 1.1: 2020-11-18
    Changes: Structure summary
  • Version 1.2: 2022-10-26
    Changes: Database references
  • Version 1.3: 2024-01-31
    Changes: Data collection, Refinement description