Regulation of Protein Function: Crystal Packing Interfaces and Conformational Dimerization

Experimental Data Snapshot

  • Resolution: 1.50 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 

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Regulation of protein function: crystal packing interfaces and conformational dimerization.

Crowley, P.B.Matias, P.M.Mi, H.Firbank, S.J.Banfield, M.J.Dennison, C.

(2008) Biochemistry 47: 6583-6589

  • DOI: https://doi.org/10.1021/bi800125h
  • Primary Citation of Related Structures:  
    3CVB, 3CVC, 3CVD

  • PubMed Abstract: 

    The accepted view of interprotein electron transport involves molecules diffusing between donor and acceptor redox sites. An emerging alternative hypothesis is that efficient long-range electron transport can be achieved through proteins arranged in supramolecular assemblies. In this study, we have investigated the crystal packing interfaces in three crystal forms of plastocyanin, an integral component of the photosynthetic electron transport chain, and discuss their potential relevance to in vivo supramolecular assemblies. Symmetry-related protein chains within these crystals have Cu-Cu separations of <25 A, a distance that readily supports electron transfer. In one structure, the plastocyanin molecule exists in two forms in which a backbone displacement coupled with side chain rearrangements enables the modulation of protein-protein interfaces.

  • Organizational Affiliation

    UCD School of Biomolecular and Biomedical Science, Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland. peter.crowley@ucd.ie

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C
105Phormidium laminosumMutation(s): 1 
Find proteins for Q51883 (Phormidium laminosum)
Explore Q51883 
Go to UniProtKB:  Q51883
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ51883
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.50 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.153 
  • R-Value Observed: 0.155 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.843α = 90
b = 85.843β = 90
c = 90.282γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2021-10-20
    Changes: Database references, Derived calculations
  • Version 1.3: 2024-02-21
    Changes: Data collection