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: 1.9 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

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

  • 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, cytoplasmic
A, C, E
97Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: DYN2 (SLC1)
Find proteins for Q02647 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q02647
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
WD repeat-containing protein PAC11
B, D, F
11Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: PAC11
Find proteins for P40960 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40960
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.160 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 101.506α = 90.00
b = 112.747β = 90.00
c = 56.369γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
PHENIXmodel building
PHENIXphasing
SERGUIdata collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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