7CYL

Crystal structure of Karyopherin-beta2 in complex with FUS PY-NLS(P525L)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


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Literature

Mechanism of karyopherin-beta 2 binding and nuclear import of ALS variants FUS(P525L) and FUS(R495X).

Gonzalez, A.Mannen, T.Cagatay, T.Fujiwara, A.Matsumura, H.Niesman, A.B.Brautigam, C.A.Chook, Y.M.Yoshizawa, T.

(2021) Sci Rep 11: 3754-3754

  • DOI: 10.1038/s41598-021-83196-y
  • Primary Citation of Related Structures:  
    7CYL

  • PubMed Abstract: 
  • Mutations in the RNA-binding protein FUS cause familial amyotropic lateral sclerosis (ALS). Several mutations that affect the proline-tyrosine nuclear localization signal (PY-NLS) of FUS cause severe juvenile ALS. FUS also undergoes liquid-liquid phase separation (LLPS) to accumulate in stress granules when cells are stressed ...

    Mutations in the RNA-binding protein FUS cause familial amyotropic lateral sclerosis (ALS). Several mutations that affect the proline-tyrosine nuclear localization signal (PY-NLS) of FUS cause severe juvenile ALS. FUS also undergoes liquid-liquid phase separation (LLPS) to accumulate in stress granules when cells are stressed. In unstressed cells, wild type FUS resides predominantly in the nucleus as it is imported by the importin Karyopherin-β2 (Kapβ2), which binds with high affinity to the C-terminal PY-NLS of FUS. Here, we analyze the interactions between two ALS-related variants FUS(P525L) and FUS(R495X) with importins, especially Kapβ2, since they are still partially localized to the nucleus despite their defective/missing PY-NLSs. The crystal structure of the Kapβ2·FUS(P525L) PY-NLS complex shows the mutant peptide making fewer contacts at the mutation site, explaining decreased affinity for Kapβ2. Biochemical analysis revealed that the truncated FUS(R495X) protein, although missing the PY-NLS, can still bind Kapβ2 and suppresses LLPS. FUS(R495X) uses its C-terminal tandem arginine-glycine-glycine regions, RGG2 and RGG3, to bind the PY-NLS binding site of Kapβ2 for nuclear localization in cells when arginine methylation is inhibited. These findings suggest the importance of the C-terminal RGG regions in nuclear import and LLPS regulation of ALS variants of FUS that carry defective PY-NLSs.


    Organizational Affiliation

    College of Life Sciences, Ritsumeikan University, Shiga, Japan. t-yosh@fc.ritsumei.ac.jp.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transportin-1A868Homo sapiensMutation(s): 0 
Gene Names: TNPO1KPNB2MIP1TRN
UniProt & NIH Common Fund Data Resources
Find proteins for Q92973 (Homo sapiens)
Explore Q92973 
Go to UniProtKB:  Q92973
PHAROS:  Q92973
GTEx:  ENSG00000083312 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92973
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RNA-binding protein FUSB54Homo sapiensMutation(s): 1 
Gene Names: FUSTLS
UniProt & NIH Common Fund Data Resources
Find proteins for P35637 (Homo sapiens)
Explore P35637 
Go to UniProtKB:  P35637
PHAROS:  P35637
GTEx:  ENSG00000089280 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35637
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.19α = 90
b = 158.366β = 90
c = 68.712γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM069909

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-24
    Type: Initial release