The second PDZ domain of Ligand of Numb protein X 2 in the presence of an electric field of ~1 MV/cm along the crystallographic x axis, with eightfold extrapolation of structure factor differences.

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.289 
  • R-Value Observed: 0.291 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Electric-field-stimulated protein mechanics.

Hekstra, D.R.White, K.I.Socolich, M.A.Henning, R.W.Srajer, V.Ranganathan, R.

(2016) Nature 540: 400-405

  • DOI: https://doi.org/10.1038/nature20571
  • Primary Citation of Related Structures:  
    5E11, 5E1Y, 5E21, 5E22

  • PubMed Abstract: 

    The internal mechanics of proteins-the coordinated motions of amino acids and the pattern of forces constraining these motions-connects protein structure to function. Here we describe a new method combining the application of strong electric field pulses to protein crystals with time-resolved X-ray crystallography to observe conformational changes in spatial and temporal detail. Using a human PDZ domain (LNX2 PDZ2 ) as a model system, we show that protein crystals tolerate electric field pulses strong enough to drive concerted motions on the sub-microsecond timescale. The induced motions are subtle, involve diverse physical mechanisms, and occur throughout the protein structure. The global pattern of electric-field-induced motions is consistent with both local and allosteric conformational changes naturally induced by ligand binding, including at conserved functional sites in the PDZ domain family. This work lays the foundation for comprehensive experimental study of the mechanical basis of protein function.

  • Organizational Affiliation

    Green Center for Systems Biology, UT Southwestern Medical Center, 6001 Forest Park Road, Dallas, Texas 75390, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ligand of Numb protein X 2A [auth B],
B [auth A]
95Homo sapiensMutation(s): 1 
Gene Names: LNX2PDZRN1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N448 (Homo sapiens)
Explore Q8N448 
Go to UniProtKB:  Q8N448
GTEx:  ENSG00000139517 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8N448
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GOL

Download Ideal Coordinates CCD File 
C3 H8 O3
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.289 
  • R-Value Observed: 0.291 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.146α = 113.31
b = 38.146β = 113.31
c = 39.01γ = 62.28
Software Package:
Software NamePurpose
Precognitiondata reduction
Epinormdata reduction

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Robert A. Welch FoundationUnited StatesI-1366

Revision History  (Full details and data files)

  • Version 1.0: 2016-12-07
    Type: Initial release
  • Version 1.1: 2017-01-11
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Refinement description
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Refinement description