1XQN

The 15k neutron structure of saccharide-free concanavalin A

• PDB DOI: https://doi.org/10.2210/pdb1XQN/pdb

• Classification: SUGAR BINDING PROTEIN
• Organism(s): Canavalia ensiformis
• Mutation(s): No 


• Deposited: 2004-10-13 Released: 2004-11-02 
• Deposition Author(s): Blakeley, M.P., Kalb-Gilboa, A.J., Helliwell, J.R., Myles, D.A.A.

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Experimental Data Snapshot

• Method: NEUTRON DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.320 
• R-Value Work: 0.266 
• R-Value Observed: 0.266 

Starting Model: experimental

Literature

The 15-K neutron structure of saccharide-free concanavalin A

Blakeley, M.P., Kalb-Gilboa, A.J., Helliwell, J.R., Myles, D.A.A.

(2004) Proc Natl Acad Sci U S A 101: 16405-16410

• PubMed: 15546977 
• DOI: https://doi.org/10.1073/pnas.0407452101
• Primary Citation of Related Structures:  
  1XQN

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Organizational Affiliation: 

University of Toledo, MS 602, Toledo, OH 43606, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.72 kDa 
• Atom Count: 2,038 
• Modelled Residue Count: 237 
• Deposited Residue Count: 237 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Concanavalin A	A	237	Canavalia ensiformis	Mutation(s): 0
UniProt
Find proteins for P02866 (Canavalia ensiformis) Explore P02866  Go to UniProtKB:  P02866

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MN	B [auth A]	MANGANESE (II) ION Mn WAEMQWOKJMHJLA-UHFFFAOYSA-N
CA	C [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: NEUTRON DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.320 
• R-Value Work: 0.266 
• R-Value Observed: 0.266 
• Space Group: I 2 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 89.16	α = 90
b = 86.129	β = 90
c = 61.594	γ = 90

Software Package:

Software Name	Purpose
LAUEGEN/LSCALE	data collection
SCALA	data reduction
CNS	refinement
LAUEGEN/LSCALE	data reduction
CCP4	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-11-02 
Deposition Author(s): Blakeley, M.P., Kalb-Gilboa, A.J., Helliwell, J.R., Myles, D.A.A.

Revision History  

• Version 1.0: 2004-11-02
  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: 2017-10-11
  Changes: Advisory, Source and taxonomy, Structure summary
• Version 1.4: 2018-03-07
  Changes: Data collection
• Version 1.5: 2024-03-13
  Changes: Data collection, Database references, Derived calculations
• Version 1.6: 2024-04-03
  Changes: Refinement description