5J8E

Crystal structure of human Hook3's conserved Hook domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.184 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Assembly and activation of dynein-dynactin by the cargo adaptor protein Hook3.

Schroeder, C.M.Vale, R.D.

(2016) J.Cell Biol. 214: 309-318

  • DOI: 10.1083/jcb.201604002

  • PubMed Abstract: 
  • Metazoan cytoplasmic dynein moves processively along microtubules with the aid of dynactin and an adaptor protein that joins dynein and dynactin into a stable ternary complex. Here, we examined how Hook3, a cargo adaptor involved in Golgi and endosom ...

    Metazoan cytoplasmic dynein moves processively along microtubules with the aid of dynactin and an adaptor protein that joins dynein and dynactin into a stable ternary complex. Here, we examined how Hook3, a cargo adaptor involved in Golgi and endosome transport, forms a motile dynein-dynactin complex. We show that the conserved Hook domain interacts directly with the dynein light intermediate chain 1 (LIC1). By solving the crystal structure of the Hook domain and using structure-based mutagenesis, we identify two conserved surface residues that are each critical for LIC1 binding. Hook proteins with mutations in these residues fail to form a stable dynein-dynactin complex, revealing a crucial role for LIC1 in this interaction. We also identify a region of Hook3 specifically required for an allosteric activation of processive motility. Our work reveals the structural details of Hook3's interaction with dynein and offers insight into how cargo adaptors form processive dynein-dynactin motor complexes.


    Organizational Affiliation

    The Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA 94158 Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94158.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein Hook homolog 3
A, B
165Homo sapiensMutation(s): 0 
Gene Names: HOOK3
Find proteins for Q86VS8 (Homo sapiens)
Go to Gene View: HOOK3
Go to UniProtKB:  Q86VS8
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.184 
  • Space Group: P 2 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.920α = 90.00
b = 75.880β = 90.00
c = 111.850γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2016-08-17
    Type: Database references
  • Version 1.2: 2017-11-22
    Type: Database references, Derived calculations, Refinement description