6KIO image
Entry Detail
PDB ID:
6KIO
EMDB ID:
Title:
Complex of yeast cytoplasmic dynein MTBD-High and MT without DTT
Biological Source:
PDB Version:
Deposition Date:
2019-07-19
Release Date:
2020-03-04
Method Details:
Experimental Method:
Resolution:
3.94 Å
Aggregation State:
FILAMENT
Reconstruction Method:
HELICAL
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Dynein heavy chain, cytoplasmic
Chain IDs:B (auth: M)
Chain Length:130
Number of Molecules:1
Biological Source:Saccharomyces cerevisiae S288c
Polymer Type:polypeptide(L)
Description:Tubulin alpha-1A chain
Chain IDs:C (auth: a)
Chain Length:412
Number of Molecules:1
Biological Source:Sus scrofa
Polymer Type:polypeptide(L)
Description:Tubulin beta chain
Chain IDs:A (auth: b)
Chain Length:426
Number of Molecules:1
Biological Source:Sus scrofa
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
HIS A HIS modified residue
Ligand Molecules
Primary Citation
Structural basis for two-way communication between dynein and microtubules.
Nat Commun 11 1038 1038 (2020)
PMID: 32098965 DOI: 10.1038/s41467-020-14842-8

Abstact

The movements of cytoplasmic dynein on microtubule (MT) tracks is achieved by two-way communication between the microtubule-binding domain (MTBD) and the ATPase domain via a coiled-coil stalk, but the structural basis of this communication remains elusive. Here, we regulate MTBD either in high-affinity or low-affinity states by introducing a disulfide bond to the stalk and analyze the resulting structures by NMR and cryo-EM. In the MT-unbound state, the affinity changes of MTBD are achieved by sliding of the stalk α-helix by a half-turn, which suggests that structural changes propagate from the ATPase-domain to MTBD. In addition, MT binding induces further sliding of the stalk α-helix even without the disulfide bond, suggesting how the MT-induced conformational changes propagate toward the ATPase domain. Based on differences in the MT-binding surface between the high- and low-affinity states, we propose a potential mechanism for the directional bias of dynein movement on MT tracks.

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Primary Citation of related structures