Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 15.17 kDa 
• Atom Count: 975 
• Modelled Residue Count: 127 
• Deposited Residue Count: 140 
• Unique protein chains: 1

4X1L

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

• PDB DOI: 10.2210/pdb4X1L/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2014-11-24 Released: 2015-06-10 
• Deposition Author(s): Silvas, T.V., Shandilya, S.M.D., Schiffer, C.A.
• Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.16 Å
• R-Value Free: 0.247 
• R-Value Work: 0.216 
• R-Value Observed: 0.217 

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

• PubMed: 26056300 
• 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 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.

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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; [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Profilin-1	A	140	Homo sapiens	Mutation(s): 0  Gene Names: PFN1
UniProt & NIH Common Fund Data Resources
Find proteins for P07737 (Homo sapiens) Explore P07737  Go to UniProtKB:  P07737
PHAROS:  P07737 GTEx:  ENSG00000108518

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	B [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.16 Å
• R-Value Free: 0.247 
• R-Value Work: 0.216 
• R-Value Observed: 0.217 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 74.26	α = 90
b = 31.84	β = 122.66
c = 61.02	γ = 90

Software Package:

Software Name	Purpose
HKL-3000	data collection
xia2	data scaling
XDS	data reduction
SCALA	data scaling
Coot	model building
PHENIX	refinement
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2014-11-24 
• Released Date: 2015-06-10 
Deposition Author(s): Silvas, T.V., Shandilya, S.M.D., Schiffer, C.A.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS090352
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS078145
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS067206
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)	United States	R01 NS073873
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	P01 GM091743
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	P01 GM091743-03S1
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R01 GM53846

Revision History  

• Version 1.0: 2015-06-10
  Type: Initial release
  
• Version 1.1: 2015-07-01
  Changes: Database references
• Version 1.2: 2015-07-15
  Changes: Database references
• Version 1.3: 2017-09-13
  Changes: Author supporting evidence, Database references, Derived calculations, Source and taxonomy, Structure summary
• Version 1.4: 2017-11-22
  Changes: Refinement description
• Version 1.5: 2019-12-18
  Changes: Author supporting evidence