6FDE

Crystal Structure of the HHD2 Domain of Whirlin : 3-helix conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural plasticity of the HHD2 domain of whirlin.

Delhommel, F.Cordier, F.Saul, F.Chataigner, L.Haouz, A.Wolff, N.

(2018) FEBS J. 285: 3738-3752

  • DOI: 10.1111/febs.14614
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Whirlin is a protein essential to sensory neurons. Its defects are responsible for non-syndromic deafness or for the Usher syndrome, a condition associating congenital deafness and progressive blindness. This large multidomain scaffolding protein is ...

    Whirlin is a protein essential to sensory neurons. Its defects are responsible for non-syndromic deafness or for the Usher syndrome, a condition associating congenital deafness and progressive blindness. This large multidomain scaffolding protein is expressed in three isoforms with different functions and localizations in stereocilia bundles of hearing hair cells or in the connector cilia of photoreceptor cells. The HHD2 domain of whirlin is the only domain shared by all isoforms, but its function remains unknown. In this article, we report its crystal structure in two distinct conformations, a monomeric five-helix bundle, similar to the known structure of other HHD domains, and a three-helix bundle organized as a swapped dimer. Most of the hydrophobic contacts and electrostatic interactions that maintain the globular monomeric form are conserved at the protomer interface of the dimer. NMR experiments revealed that the five-helix conformation is predominant in solution, but exhibits increased dynamics on one face encompassing the hinge loops. Using NMR and SAXS, we also show that HHD2 does not interact with its preceding domains. Our findings suggest that structural plasticity might play a role in the function of the HHD2 domain. This article is protected by copyright. All rights reserved.


    Organizational Affiliation

    Institut Pasteur, Unité Récepteurs-Canaux, Paris, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Whirlin
A
85Mus musculusMutation(s): 0 
Gene Names: Whrn (Dfnb31, Kiaa1526)
Find proteins for Q80VW5 (Mus musculus)
Go to UniProtKB:  Q80VW5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.214 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 34.668α = 90.00
b = 34.668β = 90.00
c = 99.732γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
PHASERphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Fondation de France-Committee Berthe FouassierFrance--
Institut PasteurFrance--
Ministere de l'Enseignement Superieur et de la RechercheFrance--

Revision History 

  • Version 1.0: 2018-08-08
    Type: Initial release
  • Version 1.1: 2018-10-31
    Type: Data collection, Database references