4HT6

The Structure of a Yeast Dynein Dyn2-Pac11 Complex and Effect on Single Molecule Dynein Motor Activity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.170 

wwPDB Validation 3D Report Full Report



Literature

The yeast dynein Dyn2-Pac11 complex is a dynein dimerization/processivity factor: structural and single-molecule characterization.

Rao, L.Romes, E.M.Nicholas, M.P.Brenner, S.Tripathy, A.Gennerich, A.Slep, K.C.

(2013) Mol Biol Cell 24: 2362-2377

  • DOI: 10.1091/mbc.E13-03-0166
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Cytoplasmic dynein is the major microtubule minus end-directed motor. Although studies have probed the mechanism of the C-terminal motor domain, if and how dynein's N-terminal tail and the accessory chains it binds regulate motor activity remain to b ...

    Cytoplasmic dynein is the major microtubule minus end-directed motor. Although studies have probed the mechanism of the C-terminal motor domain, if and how dynein's N-terminal tail and the accessory chains it binds regulate motor activity remain to be determined. Here, we investigate the structure and function of the Saccharomyces cerevisiae dynein light (Dyn2) and intermediate (Pac11) chains in dynein heavy chain (Dyn1) movement. We present the crystal structure of a Dyn2-Pac11 complex, showing Dyn2-mediated Pac11 dimerization. To determine the molecular effects of Dyn2 and Pac11 on Dyn1 function, we generated dyn2Δ and dyn2Δpac11Δ strains and analyzed Dyn1 single-molecule motor activity. We find that the Dyn2-Pac11 complex promotes Dyn1 homodimerization and potentiates processivity. The absence of Dyn2 and Pac11 yields motors with decreased velocity, dramatically reduced processivity, increased monomerization, aggregation, and immobility as determined by single-molecule measurements. Deleting dyn2 significantly reduces Pac11-Dyn1 complex formation, yielding Dyn1 motors with activity similar to Dyn1 from the dyn2Δpac11Δ strain. Of interest, motor phenotypes resulting from Dyn2-Pac11 complex depletion bear similarity to a point mutation in the mammalian dynein N-terminal tail (Loa), highlighting this region as a conserved, regulatory motor element.


    Organizational Affiliation

    Department of Anatomy and Structural Biology and Gruss Lipper Biophotonics Center, Albert Einstein College of Medicine, New York, NY 10461, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dynein light chain 1, cytoplasmicA, C, E97Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: DYN2SLC1YDR424C
Find proteins for Q02647 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q02647 
Go to UniProtKB:  Q02647
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
WD repeat-containing protein PAC11B, D, F11Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: PAC11YDR488C
Find proteins for P40960 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40960 
Go to UniProtKB:  P40960
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.170 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.506α = 90
b = 112.747β = 90
c = 56.369γ = 90
Software Package:
Software NamePurpose
SERGUIdata collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-18
    Type: Initial release