Structure of Uranotaenia sapphirina cypovirus (CPV17) polyhedrin at 298 K

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.122 
  • R-Value Observed: 0.124 

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Structure of CPV17 polyhedrin determined by the improved analysis of serial femtosecond crystallographic data.

Ginn, H.M.Messerschmidt, M.Ji, X.Zhang, H.Axford, D.Gildea, R.J.Winter, G.Brewster, A.S.Hattne, J.Wagner, A.Grimes, J.M.Evans, G.Sauter, N.K.Sutton, G.Stuart, D.I.

(2015) Nat Commun 6: 6435-6435

  • DOI: https://doi.org/10.1038/ncomms7435
  • Primary Citation of Related Structures:  
    4S1K, 4S1L

  • PubMed Abstract: 

    The X-ray free-electron laser (XFEL) allows the analysis of small weakly diffracting protein crystals, but has required very many crystals to obtain good data. Here we use an XFEL to determine the room temperature atomic structure for the smallest cytoplasmic polyhedrosis virus polyhedra yet characterized, which we failed to solve at a synchrotron. These protein microcrystals, roughly a micron across, accrue within infected cells. We use a new physical model for XFEL diffraction, which better estimates the experimental signal, delivering a high-resolution XFEL structure (1.75 Å), using fewer crystals than previously required for this resolution. The crystal lattice and protein core are conserved compared with a polyhedrin with less than 10% sequence identity. We explain how the conserved biological phenotype, the crystal lattice, is maintained in the face of extreme environmental challenge and massive evolutionary divergence. Our improved methods should open up more challenging biological samples to XFEL analysis.

  • Organizational Affiliation

    Diamond House, Diamond Light Source, Harwell Science &Innovation Campus, Didcot, Oxfordshire OX11 0DE, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
polyhedrin237Uranotaenia sapphirina cypovirusMutation(s): 0 
Find proteins for Q5EK29 (Uranotaenia sapphirina cypovirus)
Explore Q5EK29 
Go to UniProtKB:  Q5EK29
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5EK29
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ATP

Download Ideal Coordinates CCD File 
C10 H16 N5 O13 P3
Query on MG

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.154 
  • R-Value Work: 0.122 
  • R-Value Observed: 0.124 
  • Space Group: I 2 3
  • Diffraction Data: https://doi.org/10.11577/1169544
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.1α = 90
b = 106.1β = 90
c = 106.1γ = 90
Software Package:
Software NamePurpose
DIALSdata collection
cctbx.xfeldata reduction
DIALSdata reduction
DIALSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2015-03-25
    Type: Initial release
  • Version 1.1: 2017-11-15
    Changes: Data collection
  • Version 1.2: 2018-02-14
    Changes: Data collection
  • Version 1.3: 2023-08-16
    Changes: Data collection, Database references, Derived calculations