4L8Q

Crystal structure of Canavalia grandiflora seed lectin complexed with X-Man.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Vasorelaxant activity of Canavalia grandiflora seed lectin: A structural analysis.

Barroso-Neto, I.L.Simoes, R.C.Rocha, B.A.Bezerra, M.J.Pereira-Junior, F.N.Silva Osterne, V.J.Nascimento, K.S.Nagano, C.S.Delatorre, P.Pereira, M.G.Freitas Pires, A.Sampaio, A.H.Assreuy, A.M.Cavada, B.S.

(2014) Arch Biochem Biophys 543: 31-39

  • DOI: 10.1016/j.abb.2013.12.006
  • Primary Citation of Related Structures:  
    4L8Q

  • PubMed Abstract: 
  • Lectins are comprised of a large family of proteins capable of the specific and reversible recognition of carbohydrates. Legume lectins, the most studied plant lectins, show high structural similarity, but with modifications that imply a variation in the ...

    Lectins are comprised of a large family of proteins capable of the specific and reversible recognition of carbohydrates. Legume lectins, the most studied plant lectins, show high structural similarity, but with modifications that imply a variation in the intensity of some biological activities. In this work, the primary and tertiary structures of Canavalia grandiflora (ConGF) were determined. ConGF, a lectin isolated from C. grandiflora seeds, is able to induce relaxant activity in rat aortic rings. The complete sequence of ConGF comprises 237 amino acids. This particular protein has primary sequence variations commonly found in lectins from Dioclea and Canavalia genera. The protein structure was solved at 2.3 Å resolution by X-ray crystallography. An X-Man molecule was modeled into the carbohydrate recognition domain. Still, ConGF (30 and 100 μg mL(-1)) elicited 25% of vasorelaxation (IC50=34.48 ± 5.07 μg mL(-1)) in endothelialized aortic rings. A nonselective inhibitor of nitric oxide blocked ConGF relaxant effect, showing mediation by nitric oxide. Key distances between ConGF carbohydrate recognition domain residues were determined in order to explain this effect, in turn revealing some structural aspects that could differentiate lectins from the Canavalia genera with respect to different efficacy in vasorelaxant effect.


    Organizational Affiliation

    Laboratório de Moléculas Biologicamente Ativas, Universidade Federal do Ceará, Fortaleza, Brazil. Electronic address: bscavada@ufc.br.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Canavalia grandiflora seed lectin A237Canavalia grandifloraMutation(s): 0 
Find proteins for A0A067XG71 (Canavalia grandiflora)
Explore A0A067XG71 
Go to UniProtKB:  A0A067XG71
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
XMM
Query on XMM

Download Ideal Coordinates CCD File 
A
5-bromo-4-chloro-1H-indol-3-yl alpha-D-mannopyranoside
C14 H15 Br Cl N O6
OPIFSICVWOWJMJ-HAAGFXOZSA-N
 Ligand Interaction
CD
Query on CD

Download Ideal Coordinates CCD File 
A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

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A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-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: 2.30 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.228 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.422α = 90
b = 65.152β = 90
c = 106.708γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345data collection

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-05-21
    Type: Initial release
  • Version 1.1: 2017-11-15
    Changes: Refinement description
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Derived calculations, Structure summary