6IW8

Crystal structure of Importin-alpha and wild-type GM130


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report



Literature

Ran pathway-independent regulation of mitotic Golgi disassembly by Importin-alpha.

Chang, C.-C.Chen, C.-J.Grauffel, C.Pien, Y.-C.Lim, C.Tsai, S.-Y.Hsia, K.-C.

(2019) Nat Commun 10: 4307-4307

  • DOI: 10.1038/s41467-019-12207-4
  • Primary Citation of Related Structures:  
    6IWA, 6IW8, 6K06

  • PubMed Abstract: 
  • To facilitate proper mitotic cell partitioning, the Golgi disassembles by suppressing vesicle fusion. However, the underlying mechanism has not been characterized previously. Here, we report a Ran pathway-independent attenuation mechanism that allows ...

    To facilitate proper mitotic cell partitioning, the Golgi disassembles by suppressing vesicle fusion. However, the underlying mechanism has not been characterized previously. Here, we report a Ran pathway-independent attenuation mechanism that allows Importin-α (a nuclear transport factor) to suppress the vesicle fusion mediated by p115 (a vesicular tethering factor) and is required for mitotic Golgi disassembly. We demonstrate that Importin-α directly competes with p115 for interaction with the Golgi protein GM130. This interaction, promoted by a phosphate moiety on GM130, is independent of Importin-β and Ran. A GM130 K34A mutant, in which the Importin-α-GM130 interaction is specifically disrupted, exhibited abundant Golgi puncta during metaphase. Importantly, a mutant showing enhanced p115-GM130 interaction presented proliferative defects and G2/M arrest, demonstrating that Importin-α-GM130 binding modulates the Golgi disassembly that governs mitotic progression. Our findings illuminate that the Ran and kinase-phosphatase pathways regulate multiple aspects of mitosis coordinated by Importin-α (e.g. spindle assembly, Golgi disassembly).


    Organizational Affiliation

    Institute of Biochemistry and Molecular Biology, College of Life Sciences, National Yang-Ming University, Taipei, 11221, Taiwan. khsia@gate.sinica.edu.tw.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Peptide from Golgin subfamily A member 2A53Homo sapiensMutation(s): 0 
Gene Names: GOLGA2
Find proteins for Q08379 (Homo sapiens)
Explore Q08379 
Go to UniProtKB:  Q08379
NIH Common Fund Data Resources
PHAROS  Q08379
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Importin subunit alpha-1C433Mus musculusMutation(s): 0 
Gene Names: Kpna2Rch1
Find proteins for P52293 (Mus musculus)
Explore P52293 
Go to UniProtKB:  P52293
NIH Common Fund Data Resources
IMPC  MGI:103561
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.227 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.399α = 90
b = 78.628β = 90
c = 90.318γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and Technology (Taiwan)Taiwan106-2311-B-001 -038 -MY3

Revision History 

  • Version 1.0: 2019-10-02
    Type: Initial release