6CY9

SA11 Rotavirus NSP2 with disulfide bridge


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.62 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Phosphorylation cascade regulates the formation and maturation of rotaviral replication factories.

Criglar, J.M.Anish, R.Hu, L.Crawford, S.E.Sankaran, B.Prasad, B.V.V.Estes, M.K.

(2018) Proc Natl Acad Sci U S A 115: E12015-E12023

  • DOI: 10.1073/pnas.1717944115
  • Primary Citation of Related Structures:  
    6CYA, 6CY9, 6AUK

  • PubMed Abstract: 
  • The rotavirus (RV) genome is replicated and packaged into virus progeny in cytoplasmic inclusions called viroplasms, which require interactions between RV nonstructural proteins NSP2 and NSP5. How viroplasms form remains unknown. We previously found ...

    The rotavirus (RV) genome is replicated and packaged into virus progeny in cytoplasmic inclusions called viroplasms, which require interactions between RV nonstructural proteins NSP2 and NSP5. How viroplasms form remains unknown. We previously found two forms of NSP2 in RV-infected cells: a cytoplasmically dispersed dNSP2, which interacts with hypophosphorylated NSP5; and a viroplasm-specific vNSP2, which interacts with hyperphosphorylated NSP5. Other studies report that CK1α, a ubiquitous cellular kinase, hyperphosphorylates NSP5, but requires NSP2 for reasons that are unclear. Here we show that silencing CK1α in cells before RV infection resulted in ( i ) >90% decrease in RV replication, ( ii ) disrupted vNSP2 and NSP5 interaction, ( iii ) dispersion of vNSP2 throughout the cytoplasm, and ( iv ) reduced vNSP2 protein levels. Together, these data indicate that CK1α directly affects NSP2. Accordingly, an in vitro kinase assay showed that CK1α phosphorylates serine 313 of NSP2 and triggers NSP2 octamers to form a lattice structure as demonstrated by crystallographic analysis. Additionally, a dual-specificity autokinase activity for NSP2 was identified and confirmed by mass spectrometry. Together, our studies show that phosphorylation of NSP2 involving CK1α controls viroplasm assembly. Considering that CK1α plays a role in the replication of other RNA viruses, similar phosphorylation-dependent mechanisms may exist for other virus pathogens that require cytoplasmic virus factories for replication.


    Organizational Affiliation

    Department of Medicine, Gastroenterology and Hepatology, Baylor College of Medicine, Houston, TX 77030.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Non-structural protein 2A321Rotavirus AMutation(s): 0 
Gene Names: NSP2
EC: 3.6.4
Find proteins for A2T3P0 (Rotavirus A (isolate RVA/Monkey/South Africa/SA11-H96/1958/G3P5B[2]))
Explore A2T3P0 
Go to UniProtKB:  A2T3P0
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.62 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.202 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.224α = 90
b = 107.224β = 90
c = 149.7γ = 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
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR37 AI 36040
Welch FoundationUnited StatesQ1279

Revision History 

  • Version 1.0: 2018-12-05
    Type: Initial release
  • Version 1.1: 2018-12-19
    Changes: Data collection, Database references
  • Version 1.2: 2019-01-02
    Changes: Data collection, Database references
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence