1X6Z

Structure 1: cryocooled crystal structure of the truncated pak pilin from Pseudomonas aeruginosa at 0.78A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.78 Å
  • R-Value Free: 0.153 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.143 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Pros and cons of cryocrystallography: should we also collect a room-temperature data set?

Dunlop, K.V.Irvin, R.T.Hazes, B.

(2005) Acta Crystallogr D Biol Crystallogr 61: 80-87

  • DOI: 10.1107/S0907444904027179
  • Primary Citation of Related Structures:  
    1X6P, 1X6Q, 1X6R, 1X6X, 1X6Y, 1X6Z

  • PubMed Abstract: 
  • High-resolution protein structures are becoming more common owing to the availability of increasingly brilliant synchrotron X-ray sources. However, to withstand the increased X-ray dose the crystals must be held at cryogenic temperatures. To compare the benefit of increased resolution with the drawback of potential temperature-induced changes, three room-temperature and three cryogenic data sets for PAK pilin have been collected at resolutions between 1 ...

    High-resolution protein structures are becoming more common owing to the availability of increasingly brilliant synchrotron X-ray sources. However, to withstand the increased X-ray dose the crystals must be held at cryogenic temperatures. To compare the benefit of increased resolution with the drawback of potential temperature-induced changes, three room-temperature and three cryogenic data sets for PAK pilin have been collected at resolutions between 1.8 and 0.78 A. The results show that although the high-resolution cryogenic structures are more precise and more detailed, they also show systematic deviations from the room-temperature structures. Small but significant differences are even observed in the structural core, whilst more extensive changes occur at the protein surface. These differences can affect biological interpretations, especially because many important biological processes take place at the protein surface. Accordingly, although high-quality cryogenic synchrotron data is extremely valuable to protein crystallography, room-temperature structures are still desirable, especially if the research question involves protein features that are sensitive to temperature-induced changes.


    Organizational Affiliation

    Department of Medical Microbiology and Immunology, University of Alberta, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fimbrial proteinA123Pseudomonas aeruginosaMutation(s): 0 
Gene Names: pilAfimA
UniProt
Find proteins for P02973 (Pseudomonas aeruginosa)
Explore P02973 
Go to UniProtKB:  P02973
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02973
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.78 Å
  • R-Value Free: 0.153 
  • R-Value Work: 0.142 
  • R-Value Observed: 0.143 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.244α = 90
b = 37.244β = 90
c = 147.856γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
d*TREKdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-04-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2013-03-06
    Changes: Other