1SCS

HIGH-RESOLUTION STRUCTURES OF SINGLE-METAL-SUBSTITUTED CONCANAVALIN A: THE CO,CA-PROTEIN AT 1.6 ANGSTROMS AND THE NI,CA-PROTEIN AT 2.0 ANGSTROMS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 

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This is version 1.3 of the entry. See complete history


Literature

High-resolution structures of single-metal-substituted concanavalin A: the Co,Ca-protein at 1.6 A and the Ni,Ca-protein at 2.0 A.

Emmerich, C.Helliwell, J.R.Redshaw, M.Naismith, J.H.Harrop, S.J.Raftery, J.Kalb, A.J.Yariv, J.Dauter, Z.Wilson, K.S.

(1994) Acta Crystallogr D Biol Crystallogr 50: 749-756

  • DOI: https://doi.org/10.1107/S0907444994002143
  • Primary Citation of Related Structures:  
    1SCR, 1SCS

  • PubMed Abstract: 

    The molecular structures of cobalt- and nickel-substituted concanavalin A have been refined at 1.6 and 2.0 A resolution, respectively. Both metal derivatives crystallize in space group I222 with approximate cell dimensions a = 89, b = 87 and c = 63 A and one monomer in the asymmetric unit. The final R factor for Co-substituted concanavalin A is 17.8% for 29 211 reflections with F > 1.0sigma(F) between 8.0 and 1.6 A. For Ni-substituted concanavalin A the final R factor is 15.9% for 16 128 reflections with F > 1.0sigma(F) between 8.0 and 2.0 A resolution. Both structures contain a transition-metal binding site and a calcium-binding site but, unlike Cd-substituted concanavalin A, do not have a third metal-binding site. The Co-substituted concanavalin A structure diffracts to the highest resolution of any concanavalin A structure reported to date. A comparison of the structures of Ni-, Co-, Cd-substituted and native concanavalin A gives an indication of coordinate errors, which is a useful baseline for comparisons with saccharide complexes of concanavalin A described in other work. We also give a detailed account of multiple conformations which were found for five side-chain residues.


  • Organizational Affiliation

    Department of Chemistry, University of Manchester, England.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CONCANAVALIN A237Canavalia ensiformisMutation(s): 0 
Gene Names: CDNA
UniProt
Find proteins for P02866 (Canavalia ensiformis)
Explore P02866 
Go to UniProtKB:  P02866
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02866
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Work: 0.178 
  • R-Value Observed: 0.178 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.7α = 90
b = 86.5β = 90
c = 62.5γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-05-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations, Other