7JU4

Radial spoke 2 stalk, IDAc, and N-DRC attached with doublet microtubule


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of radial spokes and associated complexes important for ciliary motility.

Gui, M.Ma, M.Sze-Tu, E.Wang, X.Koh, F.Zhong, E.D.Berger, B.Davis, J.H.Dutcher, S.K.Zhang, R.Brown, A.

(2021) Nat Struct Mol Biol 28: 29-37

  • DOI: https://doi.org/10.1038/s41594-020-00530-0
  • Primary Citation of Related Structures:  
    7JTK, 7JTS, 7JU4

  • PubMed Abstract: 

    In motile cilia, a mechanoregulatory network is responsible for converting the action of thousands of dynein motors bound to doublet microtubules into a single propulsive waveform. Here, we use two complementary cryo-EM strategies to determine structures of the major mechanoregulators that bind ciliary doublet microtubules in Chlamydomonas reinhardtii. We determine structures of isolated radial spoke RS1 and the microtubule-bound RS1, RS2 and the nexin-dynein regulatory complex (N-DRC). From these structures, we identify and build atomic models for 30 proteins, including 23 radial-spoke subunits. We reveal how mechanoregulatory complexes dock to doublet microtubules with regular 96-nm periodicity and communicate with one another. Additionally, we observe a direct and dynamically coupled association between RS2 and the dynein motor inner dynein arm subform c (IDAc), providing a molecular basis for the control of motor activity by mechanical signals. These structures advance our understanding of the role of mechanoregulation in defining the ciliary waveform.


  • Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein regulatory complex subunit 4A [auth 0],
E [auth 4]
471Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein regulatory complex protein 1B [auth 1]698Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein regulatory complex subunit 2C [auth 2]573Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Unknown proteinD [auth 3]72Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin beta443Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Tubulin alpha451Chlamydomonas reinhardtiiMutation(s): 0 
EC: 3.6.5
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Flagellar-associated protein 59J [auth A]925Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Flagellar-associated protein 172K [auth B]904Chlamydomonas reinhardtiiMutation(s): 0 
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Find proteins for A0A0A1GYE8 (Chlamydomonas reinhardtii)
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Radial spoke protein 3N [auth E],
O [auth F]
516Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Radial spoke protein 7V [auth M],
W [auth N]
500Chlamydomonas reinhardtiiMutation(s): 0 
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Find proteins for A0A2K3DL29 (Chlamydomonas reinhardtii)
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Radial spoke protein 11DA [auth U],
EA [auth V]
204Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein 8 kDa light chain, flagellar outer arm91Chlamydomonas reinhardtiiMutation(s): 0 
UniProt
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Radial spoke protein 15UA [auth l]331Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
FAP207VA [auth m]256Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Radial spike protein 8WA [auth n]378Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
FAP253BB [auth s]682Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
ActinDB [auth u]377Chlamydomonas reinhardtiiMutation(s): 0 
EC: 3.6.4
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Entity ID: 18
MoleculeChains Sequence LengthOrganismDetailsImage
28 kDa inner dynein arm light chain, axonemalEB [auth v],
FB [auth w]
253Chlamydomonas reinhardtiiMutation(s): 0 
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Entity ID: 19
MoleculeChains Sequence LengthOrganismDetailsImage
CFAP91 domain-containing proteinGB [auth x]1,298Chlamydomonas reinhardtiiMutation(s): 0 
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Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
CC [auth P]
FC [auth R]
IC [auth T]
KB [auth 7]
LC [auth X]
CC [auth P],
FC [auth R],
IC [auth T],
KB [auth 7],
LC [auth X],
NB [auth 9],
OC [auth Z],
QB [auth D],
RC [auth j],
TB [auth H],
WB [auth J],
WC [auth y],
YC [auth z],
ZB [auth L]
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
ATP
Query on ATP

Download Ideal Coordinates CCD File 
VC [auth u]ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
GDP
Query on GDP

Download Ideal Coordinates CCD File 
BC [auth O]
EC [auth Q]
HC [auth S]
JB [auth 6]
KC [auth W]
BC [auth O],
EC [auth Q],
HC [auth S],
JB [auth 6],
KC [auth W],
MB [auth 8],
NC [auth Y],
PB [auth C],
QC [auth i],
SB [auth G],
TC [auth k],
VB [auth I],
XC [auth y],
YB [auth K]
GUANOSINE-5'-DIPHOSPHATE
C10 H15 N5 O11 P2
QGWNDRXFNXRZMB-UUOKFMHZSA-N
MG
Query on MG

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AC [auth L]
DC [auth P]
GC [auth R]
JC [auth T]
LB [auth 7]
AC [auth L],
DC [auth P],
GC [auth R],
JC [auth T],
LB [auth 7],
MC [auth X],
OB [auth 9],
PC [auth Z],
RB [auth D],
SC [auth j],
UB [auth H],
UC [auth t],
XB [auth J],
ZC [auth z]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1
MODEL REFINEMENTPHENIX

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 States--

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
  • Version 1.3: 2024-03-06
    Changes: Data collection, Database references