6RZA

Cryo-EM structure of the human inner arm dynein DNAH7 microtubule binding domain bound to microtubules


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM of dynein microtubule-binding domains shows how an axonemal dynein distorts the microtubule.

Lacey, S.E.He, S.Scheres, S.H.Carter, A.P.

(2019) Elife 8

  • DOI: 10.7554/eLife.47145
  • Primary Citation of Related Structures:  
    6RZA, 6RZB

  • PubMed Abstract: 
  • Dyneins are motor proteins responsible for transport in the cytoplasm and the beating of axonemes in cilia and flagella. They bind and release microtubules via a compact microtubule-binding domain (MTBD) at the end of a coiled-coil stalk. We address how cytoplasmic and axonemal dynein MTBDs bind microtubules at near atomic resolution ...

    Dyneins are motor proteins responsible for transport in the cytoplasm and the beating of axonemes in cilia and flagella. They bind and release microtubules via a compact microtubule-binding domain (MTBD) at the end of a coiled-coil stalk. We address how cytoplasmic and axonemal dynein MTBDs bind microtubules at near atomic resolution. We decorated microtubules with MTBDs of cytoplasmic dynein-1 and axonemal dynein DNAH7 and determined their cryo-EM structures using helical Relion. The majority of the MTBD is rigid upon binding, with the transition to the high-affinity state controlled by the movement of a single helix at the MTBD interface. DNAH7 contains an 18-residue insertion, found in many axonemal dyneins, that contacts the adjacent protofilament. Unexpectedly, we observe that DNAH7, but not dynein-1, induces large distortions in the microtubule cross-sectional curvature. This raises the possibility that dynein coordination in axonemes is mediated via conformational changes in the microtubule.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, United Kingdom.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytoplasmic dynein 1 heavy chain 1,Dynein heavy chain 7, axonemal,Cytoplasmic dynein 1 heavy chain 1 X163Mus musculusHomo sapiensMutation(s): 0 
Gene Names: Dync1h1Dhc1Dnch1Dnchc1DyhcDNAH7KIAA0944
Find proteins for Q8WXX0 (Homo sapiens)
Explore Q8WXX0 
Go to UniProtKB:  Q8WXX0
NIH Common Fund Data Resources
PHAROS:  Q8WXX0
Find proteins for Q9JHU4 (Mus musculus)
Explore Q9JHU4 
Go to UniProtKB:  Q9JHU4
NIH Common Fund Data Resources
IMPC:  MGI:103147
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin alpha-1B chain AC437Sus scrofaMutation(s): 0 
Gene Names: TUBA1B
Find proteins for Q2XVP4 (Sus scrofa)
Explore Q2XVP4 
Go to UniProtKB:  Q2XVP4
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Tubulin beta chain BD426Sus scrofaMutation(s): 0 
Find proteins for P02554 (Sus scrofa)
Explore P02554 
Go to UniProtKB:  P02554
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.50 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMC_UP_A025_1011
Wellcome TrustUnited KingdomWT210711

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-10
    Type: Initial release
  • Version 1.1: 2019-07-17
    Changes: Data collection, Database references