Apocrustacyanin C1 crystals grown in space and earth using vapour diffusion geometry

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

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Apocrustacyanin C(1) Crystals Grown in Space and on Earth Using Vapour-Diffusion Geometry: Protein Structure Refinements and Electron-Density Map Comparisons

Habash, J.Boggon, T.J.Raftery, J.Chayen, N.E.Zagalsky, P.F.Helliwell, J.R.

(2003) Acta Crystallogr D Biol Crystallogr 59: 1117

  • DOI: https://doi.org/10.1107/s0907444903007959
  • Primary Citation of Related Structures:  
    1OBQ, 1OBU

  • PubMed Abstract: 

    Models of apocrustacyanin C(1) were refined against X-ray data recorded on Bending Magnet 14 at the ESRF to resolutions of 1.85 and 2 A from a space-grown and an earth-grown crystal, respectively, both using vapour-diffusion crystal-growth geometry. The space crystals were grown in the APCF on the NASA Space Shuttle. The microgravity crystal growth showed a cyclic nature attributed to Marangoni convection, thus reducing the benefits of the microgravity environment, as reported previously [Chayen et al. (1996), Q. Rev. Biophys. 29, 227-278]. A subsequent mosaicity evaluation, also reported previously, showed only a partial improvement in the space-grown crystals over the earth-grown crystals [Snell et al. (1997), Acta Cryst. D53, 231-239], contrary to the case for lysozyme crystals grown in space with liquid-liquid diffusion, i.e. without any major motion during growth [Snell et al. (1995), Acta Cryst. D52, 1099-1102]. In this paper, apocrustacyanin C(1) electron-density maps from the two refined models are now compared. It is concluded that the electron-density maps of the protein and the bound waters are found to be better overall for the structures of apocrustacyanin C(1) studied from the space-grown crystal compared with those from the earth-grown crystal, even though both crystals were grown using vapour-diffusion crystal-growth geometry. The improved residues are on the surface of the protein, with two involved in or nearby crystal lattice-forming interactions, thus linking an improved crystal-growth mechanism to the molecular level. The structural comparison procedures developed should themselves be valuable for evaluating crystal-growth procedures in the future.

  • Organizational Affiliation

    Department of Chemistry, University of Manchester, Manchester M13 9PL, England.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
181Homarus gammarusMutation(s): 0 
Find proteins for P80029 (Homarus gammarus)
Explore P80029 
Go to UniProtKB:  P80029
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP80029
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.018α = 90
b = 81.033β = 90
c = 110.507γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-07-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance