4W7G

Crystal Structure of the Dynein Light Intermediate Chain's Conserved Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

A Ras-like domain in the light intermediate chain bridges the dynein motor to a cargo-binding region.

Schroeder, C.M.Ostrem, J.M.Hertz, N.T.Vale, R.D.

(2014) Elife 3: e03351-e03351

  • DOI: 10.7554/eLife.03351

  • PubMed Abstract: 
  • Cytoplasmic dynein, a microtubule-based motor protein, transports many intracellular cargos by means of its light intermediate chain (LIC). In this study, we have determined the crystal structure of the conserved LIC domain, which binds the motor hea ...

    Cytoplasmic dynein, a microtubule-based motor protein, transports many intracellular cargos by means of its light intermediate chain (LIC). In this study, we have determined the crystal structure of the conserved LIC domain, which binds the motor heavy chain, from a thermophilic fungus. We show that the LIC has a Ras-like fold with insertions that distinguish it from Ras and other previously described G proteins. Despite having a G protein fold, the fungal LIC has lost its ability to bind nucleotide, while the human LIC1 binds GDP preferentially over GTP. We show that the LIC G domain binds the dynein heavy chain using a conserved patch of aromatic residues, whereas the less conserved C-terminal domain binds several Rab effectors involved in membrane transport. These studies provide the first structural information and insight into the evolutionary origin of the LIC as well as revealing how this critical subunit connects the dynein motor to cargo.


    Organizational Affiliation

    Department of Cellular and Molecular Pharmacology, Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dynein Light Intermediate Chain
A
552Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719)Mutation(s): 0 
Find proteins for G0S0R6 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0S0R6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.174 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 59.370α = 90.00
b = 138.670β = 90.00
c = 112.540γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR37GM038499
National Institutes of Health/National Institute of General Medical SciencesUnited StatesR01GM097312
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2014-10-01
    Type: Initial release
  • Version 1.1: 2014-10-15
    Type: Database references
  • Version 1.2: 2014-11-26
    Type: Database references
  • Version 1.3: 2015-02-04
    Type: Derived calculations
  • Version 1.4: 2017-09-13
    Type: Author supporting evidence, Derived calculations, Other, Source and taxonomy, Structure summary