2CWM

Native Crystal Structure of NO releasing inductive lectin from seeds of the Canavalia maritima (ConM)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

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This is version 1.3 of the entry. See complete history. 


Literature

Native crystal structure of a nitric oxide-releasing lectin from the seeds of Canavalia maritima

Gadelha, C.A.A., Moreno, F.B.M.B., Santi-Gadelha, T., Cajazeiras, J.B., Rocha, B.A.M., Assreuy, A.M.S., Lima Mota, M.R., Pinto, N.V., Passos Meireles, A.V., Borges, J.C., Freitas, B.T., Canduri, F., Souza, E.P., Delatorre, P., Criddle, D.N., De Azevedo Jr., W.F., Cavada, B.S.

(2005) J Struct Biol 152: 185-194

  • DOI: 10.1016/j.jsb.2005.07.012
  • Primary Citation of Related Structures:  
    2CWM

  • PubMed Abstract: 

    • Here, we report the crystallographic study of a lectin from Canavalia maritima seeds (ConM) and its relaxant activity on vascular smooth muscle, to provide new insights into the understanding of structure/function relationships of this class of proteins. ...

    Here, we report the crystallographic study of a lectin from Canavalia maritima seeds (ConM) and its relaxant activity on vascular smooth muscle, to provide new insights into the understanding of structure/function relationships of this class of proteins. ConM was crystallized and its structure determined by standard molecular replacement techniques. The amino acid residues, previously suggested incorrectly by manual sequencing, have now been determined as I17, I53, S129, S134, G144, S164, P165, S187, V190, S169, T196, and S202. Analysis of the structure indicated a dimer in the asymmetric unit, two metal binding sites per monomer, and loops involved in the molecular oligomerization. These confer 98% similarity between ConM and other previously described lectins, derived from Canavalia ensiformis and Canavalia brasiliensis. Our functional data indicate that ConM exerts a concentration-dependent relaxant action on isolated aortic rings that probably occurs via an interaction with a specific lectin-binding site on the endothelium, resulting in a release of nitric oxide.

    Organizational Affiliation: 

    BioMol-Lab/Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, Brazil.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
lectin A, D237Canavalia roseaMutation(s): 0 
Find proteins for P81364 (Canavalia rosea)
Explore P81364 
Go to UniProtKB:  P81364
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN
Download Ideal Coordinates CCD File 
A, D
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
A, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.916α = 90
b = 97.617β = 90
c = 71.021γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MAR345data collection
CCP4data scaling
MOLREPphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-17
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description