6WPQ

GNYNVF from hnRNPA2-low complexity domain segment, residues 286-291, D290V variant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.104 
  • R-Value Work: 0.074 
  • R-Value Observed: 0.077 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

CryoEM structure of the low-complexity domain of hnRNPA2 and its conversion to pathogenic amyloid.

Lu, J.Cao, Q.Hughes, M.P.Sawaya, M.R.Boyer, D.R.Cascio, D.Eisenberg, D.S.

(2020) Nat Commun 11: 4090-4090

  • DOI: 10.1038/s41467-020-17905-y
  • Primary Citation of Related Structures:  
    6WQK, 6WPQ

  • PubMed Abstract: 
  • hnRNPA2 is a human ribonucleoprotein (RNP) involved in RNA metabolism. It forms fibrils both under cellular stress and in mutated form in neurodegenerative conditions. Previous work established that the C-terminal low-complexity domain (LCD) of hnRNPA2 f ...

    hnRNPA2 is a human ribonucleoprotein (RNP) involved in RNA metabolism. It forms fibrils both under cellular stress and in mutated form in neurodegenerative conditions. Previous work established that the C-terminal low-complexity domain (LCD) of hnRNPA2 fibrillizes under stress, and missense mutations in this domain are found in the disease multisystem proteinopathy (MSP). However, little is known at the atomic level about the hnRNPA2 LCD structure that is involved in those processes and how disease mutations cause structural change. Here we present the cryo-electron microscopy (cryoEM) structure of the hnRNPA2 LCD fibril core and demonstrate its capability to form a reversible hydrogel in vitro containing amyloid-like fibrils. Whereas these fibrils, like pathogenic amyloid, are formed from protein chains stacked into β-sheets by backbone hydrogen bonds, they display distinct structural differences: the chains are kinked, enabling non-covalent cross-linking of fibrils and disfavoring formation of pathogenic steric zippers. Both reversibility and energetic calculations suggest these fibrils are less stable than pathogenic amyloid. Moreover, the crystal structure of the disease-mutation-containing segment (D290V) of hnRNPA2 suggests that the replacement fundamentally alters the fibril structure to a more stable energetic state. These findings illuminate how molecular interactions promote protein fibril networks and how mutation can transform fibril structure from functional to a pathogenic form.


    Organizational Affiliation

    UCLA-DOE Institute, Molecular Biology Institute, Howard Hughes Medical Institute, Los Angeles, CA, USA. david@mbi.ucla.edu.



Macromolecules
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Heterogeneous nuclear ribonucleoprotein A2 A6Homo sapiensMutation(s): 1 
Gene Names: HNRNPA2B1HNRPA2B1
Find proteins for P22626 (Homo sapiens)
Explore P22626 
Go to UniProtKB:  P22626
NIH Common Fund Data Resources
PHAROS:  P22626
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.10 Å
  • R-Value Free: 0.104 
  • R-Value Work: 0.074 
  • R-Value Observed: 0.077 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 4.78α = 90
b = 19β = 95.71
c = 20.74γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
SHELXDphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Science Foundation (NSF, United States)United States1616265
National Institutes of Health/National Institute on Aging (NIH/NIA)United StatesAG054022

Revision History 

  • Version 1.0: 2020-08-19
    Type: Initial release
  • Version 1.1: 2020-08-26
    Changes: Database references