4X1M

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

wwPDB Validation   3D Report Full Report


This is version 1.5 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:  
    4X1L, 4X1M, 4X25

  • 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 conformation of ...

    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; Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, MA 01605; Daryl.Bosco@umassmed.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Profilin-1 A140Homo sapiensMutation(s): 1 
Gene Names: PFN1
Find proteins for P07737 (Homo sapiens)
Explore P07737 
Go to UniProtKB:  P07737
NIH Common Fund Data Resources
PHAROS:  P07737
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.65α = 90
b = 31.712β = 122.03
c = 60.539γ = 90
Software Package:
Software NamePurpose
HKL-3000data collection
HKL-2000data scaling
HKL-2000data reduction
SCALEPACKdata scaling
Cootmodel building
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01 NS090352
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01 NS078145
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01 NS067206
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01 NS073873
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP01 GM091743
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP01 GM091743-03S1
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM53846

Revision History 

  • Version 1.0: 2015-06-10
    Type: Initial release
  • Version 1.1: 2015-06-17
    Changes: Database references, Structure summary
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence, Derived calculations, Source and taxonomy, Structure summary
  • Version 1.3: 2017-11-22
    Changes: Refinement description
  • Version 1.4: 2018-04-25
    Changes: Data collection, Database references
  • Version 1.5: 2019-12-18
    Changes: Author supporting evidence