Crystal structure of small protein crambin at 0.48 A resolution

Experimental Data Snapshot

  • Resolution: 0.48 Å
  • R-Value Work: 0.127 
  • R-Value Observed: 0.127 

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This is version 1.6 of the entry. See complete history


Crystal structure of small protein crambin at 0.48 A resolution

Schmidt, A.Teeter, M.Weckert, E.Lamzin, V.S.

(2011) Acta Crystallogr Sect F Struct Biol Cryst Commun 67: 424-429

  • DOI: https://doi.org/10.1107/S1744309110052607
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    With the development of highly brilliant and extremely intense synchrotron X-ray sources, extreme high-resolution limits for biological samples are now becoming attainable. Here, a study is presented that sets the record in crystallographic resolution for a biological macromolecule. The structure of the small protein crambin was determined to 0.48 Å resolution on the PETRA II ring before its conversion to a dedicated synchrotron-radiation source. The results reveal a wealth of details in electron density and demonstrate the possibilities that are potentially offered by a high-energy source. The question now arises as to what the true limits are in terms of what can be seen at such high resolution. From what can be extrapolated from the results using crystals of crambin, this limit would be at approximately 0.40 Å, which approaches that for smaller compounds.

  • Organizational Affiliation

    EMBL Hamburg, c/o DESY, Notkestrasse 85, D-22607 Hamburg, Germany. andrea@embl-hamburg.de

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Crambin46Crambe hispanica subsp. abyssinicaMutation(s): 2 
Find proteins for P01542 (Crambe hispanica subsp. abyssinica)
Explore P01542 
Go to UniProtKB:  P01542
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP01542
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 0.48 Å
  • R-Value Work: 0.127 
  • R-Value Observed: 0.127 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 22.329α = 90
b = 18.471β = 90.55
c = 40.769γ = 90
Software Package:
Software NamePurpose
MAR345data collection
DENZOdata reduction
SCALEPACKdata scaling
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-05-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-03-02
    Changes: Database references
  • Version 1.3: 2017-11-08
    Changes: Refinement description
  • Version 1.4: 2018-01-24
    Changes: Database references
  • Version 1.5: 2018-04-04
    Changes: Data collection
  • Version 1.6: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description