Structure of thaumatin determined at SwissFEL using native-SAD at 4.57 keV from all available diffraction patterns

Experimental Data Snapshot

  • Resolution: 2.65 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.150 
  • R-Value Observed: 0.152 

wwPDB Validation   3D Report Full Report

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Advances in long-wavelength native phasing at X-ray free-electron lasers.

Nass, K.Cheng, R.Vera, L.Mozzanica, A.Redford, S.Ozerov, D.Basu, S.James, D.Knopp, G.Cirelli, C.Martiel, I.Casadei, C.Weinert, T.Nogly, P.Skopintsev, P.Usov, I.Leonarski, F.Geng, T.Rappas, M.Dore, A.S.Cooke, R.Nasrollahi Shirazi, S.Dworkowski, F.Sharpe, M.Olieric, N.Bacellar, C.Bohinc, R.Steinmetz, M.O.Schertler, G.Abela, R.Patthey, L.Schmitt, B.Hennig, M.Standfuss, J.Wang, M.Milne, C.J.

(2020) IUCrJ 7: 965-975

  • DOI: https://doi.org/10.1107/S2052252520011379
  • Primary Citation of Related Structures:  
    6S0L, 6S0Q, 6S19, 6S1D, 6S1E, 6S1G

  • PubMed Abstract: 

    Long-wavelength pulses from the Swiss X-ray free-electron laser (XFEL) have been used for de novo protein structure determination by native single-wavelength anomalous diffraction (native-SAD) phasing of serial femtosecond crystallography (SFX) data. In this work, sensitive anomalous data-quality indicators and model proteins were used to quantify improvements in native-SAD at XFELs such as utilization of longer wavelengths, careful experimental geometry optimization, and better post-refinement and partiality correction. Compared with studies using shorter wavelengths at other XFELs and older software versions, up to one order of magnitude reduction in the required number of indexed images for native-SAD was achieved, hence lowering sample consumption and beam-time requirements significantly. Improved data quality and higher anomalous signal facilitate so-far underutilized de novo structure determination of challenging proteins at XFELs. Improvements presented in this work can be used in other types of SFX experiments that require accurate measurements of weak signals, for example time-resolved studies.

  • Organizational Affiliation

    Photon Science Division, Paul Scherrer Institut, Forschungsstrasse 111, Villigen PSI, 5232, Switzerland.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Thaumatin-1207Thaumatococcus danielliiMutation(s): 0 
Find proteins for P02883 (Thaumatococcus daniellii)
Explore P02883 
Go to UniProtKB:  P02883
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02883
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on TLA

Download Ideal Coordinates CCD File 
C4 H6 O6
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.5α = 90
b = 58.5β = 90
c = 151.25γ = 90
Software Package:
Software NamePurpose
CrystFELdata reduction
CrystFELdata scaling

Structure Validation

View Full Validation Report

Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-15
    Type: Initial release
  • Version 1.1: 2020-12-02
    Changes: Database references
  • Version 1.2: 2023-12-13
    Changes: Data collection, Database references