N-terminal domain of dynein intermediate chain from Chaetomium thermophilum

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Interplay of Disorder and Sequence Specificity in the Formation of Stable Dynein-Dynactin Complexes.

Loening, N.M.Saravanan, S.Jespersen, N.E.Jara, K.Barbar, E.

(2020) Biophys J 119: 950-965

  • DOI: https://doi.org/10.1016/j.bpj.2020.07.023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Cytoplasmic dynein is a eukaryotic motor protein complex that, along with its regulatory protein dynactin, is essential to the transport of organelles within cells. The interaction of dynein with dynactin is regulated by binding between the intermediate chain (IC) subunit of dynein and the p150 Glued subunit of dynactin. Even though in the rat versions of these proteins this interaction primarily involves the single α-helix region at the N-terminus of the IC, in Drosophila and yeast ICs the removal of a nascent helix (H2) downstream of the single α-helix considerably diminishes IC-p150 Glued complex stability. We find that for ICs from various species, there is a correlation between disorder in H2 and its contribution to binding affinity, and that sequence variations in H2 that do not change the level of disorder show similar binding behavior. Analysis of the structure and interactions of the IC from Chaetomium thermophilum demonstrates that the H2 region of C. thermophilum IC has a low helical propensity and establishes that H2 binds directly to the coiled-coil 1B (CC1B) domain of p150 Glued , thus explaining why H2 is necessary for tight binding. Isothermal titration calorimetry, circular dichroism, and NMR studies of smaller CC1B constructs localize the region of CC1B most essential for a tight interaction with IC. These results suggest that it is the level of disorder in H2 of IC along with its charge, rather than sequence specificity, that underlie its importance in initiating tight IC-p150 Glued complex formation. We speculate that the nascent H2 helix may provide conformational flexibility to initiate binding, whereas those species that have a fully folded H2 have co-opted an alternative mechanism for promoting p150 Glued binding.

  • Organizational Affiliation

    Department of Chemistry, Lewis & Clark College, Portland, Oregon.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dynein intermediate chain protein92Thermochaetoides thermophila DSM 1495Mutation(s): 0 
Gene Names: CTHT_0056990
Find proteins for G0SCF1 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SCF1 
Go to UniProtKB:  G0SCF1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupG0SCF1
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United States1617019

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-19
    Type: Initial release
  • Version 1.1: 2020-09-02
    Changes: Database references
  • Version 1.2: 2020-09-16
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Database references, Other
  • Version 1.4: 2024-05-15
    Changes: Data collection, Database references