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 1.2 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: 10.1107/S0907444994002143
  • Primary Citation of Related Structures:  
    1SCS, 1SCR

  • 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 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.


    Related Citations: 
    • Non-Glycosylated Recombinant Pro-Concanavalin a is Active without Polypeptide Cleavage
      Min, W., Dunn, A.J., Jones
      (1992) EMBO J 11: 1130
    • The Refined Structure of Cadmium Substituted Concanavalin a at 2.0 Angstroms Resolution
      Naismith, J.H., Habash, J., Harrop, S.J., Helliwell, J.R., Hunter, W.N., Wan, T.C.M., Weisgerber, S., Kalb(Gilboa), A.J., Yariv, J.
      (1993) Acta Crystallogr D Biol Crystallogr 49: 561

    Organizational Affiliation

    Department of Chemistry, University of Manchester, England.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CONCANAVALIN A A237Canavalia ensiformisMutation(s): 0 
Gene Names: CDNA
Find proteins for P02866 (Canavalia ensiformis)
Explore P02866 
Go to UniProtKB:  P02866
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CO
Query on CO

Download Ideal Coordinates CCD File 
A
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
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