4X25

Structural basis for mutation-induced destabilization of Profilin 1 in ALS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.23 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural basis for mutation-induced destabilization of profilin 1 in ALS.

Boopathy, S.Silvas, T.V.Tischbein, M.Jansen, S.Shandilya, S.M.Zitzewitz, J.A.Landers, J.E.Goode, B.L.Schiffer, C.A.Bosco, D.A.

(2015) Proc. Natl. Acad. Sci. U.S.A. 112: 7984-7989

  • DOI: 10.1073/pnas.1424108112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mutations in profilin 1 (PFN1) are associated with amyotrophic lateral sclerosis (ALS); however, the pathological mechanism of PFN1 in this fatal disease is unknown. We demonstrate that ALS-linked mutations severely destabilize the native conformatio ...

    Mutations in profilin 1 (PFN1) are associated with amyotrophic lateral sclerosis (ALS); however, the pathological mechanism of PFN1 in this fatal disease is unknown. We demonstrate that ALS-linked mutations severely destabilize the native conformation of PFN1 in vitro and cause accelerated turnover of the PFN1 protein in cells. This mutation-induced destabilization can account for the high propensity of ALS-linked variants to aggregate and also provides rationale for their reported loss-of-function phenotypes in cell-based assays. The source of this destabilization is illuminated by the X-ray crystal structures of several PFN1 proteins, revealing an expanded cavity near the protein core of the destabilized M114T variant. In contrast, the E117G mutation only modestly perturbs the structure and stability of PFN1, an observation that reconciles the occurrence of this mutation in the control population. These findings suggest that a destabilized form of PFN1 underlies PFN1-mediated ALS pathogenesis.


    Organizational Affiliation

    Department of Neurology, University of Massachusetts Medical School, Worcester, MA 01605;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Profilin-1
A, B
140Homo sapiensMutation(s): 1 
Gene Names: PFN1
Find proteins for P07737 (Homo sapiens)
Go to Gene View: PFN1
Go to UniProtKB:  P07737
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.23 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.195 
  • Space Group: P 6
Unit Cell:
Length (Å)Angle (°)
a = 81.690α = 90.00
b = 81.690β = 90.00
c = 65.350γ = 120.00
Software Package:
Software NamePurpose
HKL-3000data collection
XSCALEdata scaling
xia2data scaling
PHASERphasing
Cootmodel building
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-06-10
    Type: Initial release
  • Version 1.1: 2015-06-17
    Type: Database references, Structure summary
  • Version 1.2: 2017-11-22
    Type: Derived calculations, Refinement description, Source and taxonomy
  • Version 1.3: 2018-04-25
    Type: Data collection, Database references