7JRJ

Chlamydomonas reinhardtii radial spoke head and neck (recombinant)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.03 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the radial spoke head and insights into its role in mechanoregulation of ciliary beating.

Grossman-Haham, I.Coudray, N.Yu, Z.Wang, F.Zhang, N.Bhabha, G.Vale, R.D.

(2021) Nat Struct Mol Biol 28: 20-28

  • DOI: 10.1038/s41594-020-00519-9
  • Primary Citation of Related Structures:  
    7JR9, 7JRJ

  • PubMed Abstract: 
  • Motile cilia power cell locomotion and drive extracellular fluid flow by propagating bending waves from their base to tip. The coordinated bending of cilia requires mechanoregulation by the radial spoke (RS) protein complexes and the microtubule central pair (CP) ...

    Motile cilia power cell locomotion and drive extracellular fluid flow by propagating bending waves from their base to tip. The coordinated bending of cilia requires mechanoregulation by the radial spoke (RS) protein complexes and the microtubule central pair (CP). Despite their importance for ciliary motility across eukaryotes, the molecular function of the RSs is unknown. Here, we reconstituted the Chlamydomonas reinhardtii RS head that abuts the CP and determined its structure using single-particle cryo-EM to 3.1-Å resolution, revealing a flat, negatively charged surface supported by a rigid core of tightly intertwined proteins. Mutations in this core, corresponding to those involved in human ciliopathies, compromised the stability of the recombinant complex, providing a molecular basis for disease. Partially reversing the negative charge on the RS surface impaired motility in C. reinhardtii. We propose that the RS-head architecture is well-suited for mechanoregulation of ciliary beating through physical collisions with the CP.


    Organizational Affiliation

    Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA, USA. valer@janelia.hhmi.org.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Radial spoke protein 10A [auth E]216Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP10CHLRE_01g005450v5CHLREDRAFT_185792
UniProt
Find proteins for Q27YU4 (Chlamydomonas reinhardtii)
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 1B [auth F]814Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP1CHLREDRAFT_196412
UniProt
Find proteins for Q27YU0 (Chlamydomonas reinhardtii)
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Nucleoside diphosphate kinase 6C [auth K]586Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP23CHLRE_16g654300v5CHLREDRAFT_139197
EC: 2.7.4.6
UniProt
Find proteins for Q69B19 (Chlamydomonas reinhardtii)
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 2D [auth I]738Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP2CHLREDRAFT_186281
UniProt
Find proteins for Q6UBQ3 (Chlamydomonas reinhardtii)
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
unknown proteinE [auth J]4Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 3F [auth G]362Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP3
UniProt
Find proteins for P12759 (Chlamydomonas reinhardtii)
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 5G [auth H]527Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP5CHLREDRAFT_190792
EC: 1
UniProt
Find proteins for Q27YU7 (Chlamydomonas reinhardtii)
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Radial spoke protein 9H [auth A], I [auth B]269Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP9CHLRE_07g330200v5CHLREDRAFT_182960
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 4J [auth C]466Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP4
UniProt
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 6K [auth D]459Chlamydomonas reinhardtiiMutation(s): 0 
Gene Names: RSP6
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 6L6Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 10M5Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 1N89Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Flagellar radial spoke protein 2O69Chlamydomonas reinhardtiiMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.03 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR00GM112982
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM118106
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM103310

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-16
    Type: Initial release
  • Version 1.1: 2020-12-30
    Changes: Database references
  • Version 1.2: 2021-01-27
    Changes: Database references