Biological Assembly 1  

 3D View: Structure | Electron Density

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Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Hetero 6-mer - A3B3 Pseudo Symmetry: Dihedral - D3  (3D View)
Pseudo Stoichiometry: Homo 6-mer -A6 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 41609.75 
• Atom Count: 2930 
• Residue Count: 365 
• Unique protein chains: 2

1CAU

DETERMINATION OF THREE CRYSTAL STRUCTURES OF CANAVALIN BY MOLECULAR REPLACEMENT

• DOI: 10.2210/pdb1CAU/pdb

• Classification: SEED STORAGE PROTEIN
• Organism(s): Canavalia ensiformis


• Deposited: 1993-07-08 Released: 1993-10-31 
• Deposition Author(s): Ko, T-P., Ng, J.D., Day, J., Greenwood, A., McPherson, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å

Literature

Determination of three crystal structures of canavalin by molecular replacement.

Ko, T.P., Ng, J.D., Day, J., Greenwood, A., McPherson, A.

(1993) Acta Crystallogr.,Sect.D 49: 478-489

• PubMed: 15299507 
• DOI: 10.1107/S0907444993004056
• Primary Citation of Related Structures:  
  1CAX, 1CAW, 1CAV


• PubMed Abstract: 
  

Canavalin, the major reserve protein of the jack bean, was obtained in four different crystal forms. From the structure determined by multiple isomorphous replacement in a hexagonal unit cell, the structures of three other crystals were determined by molecular replacement. In two cases, the rhombohedral and cubic crystals, placement was facilitated by coincidence of threefold molecular symmetry with crystallographic operators. In the orthorhombic crystal the canavalin trimer was the asymmetric unit. The rhombohedral, orthorhombic and cubic crystal structures were subsequently refined using a combination of several approaches with resulting R factors of 0.194, 0.185 and 0.211 at resolutions of 2.6, 2.6 and 2.3 A, respectively. Variation in the conformation of the molecule from crystal to crystal was small with an r.m.s. deviation in Calpha positions of 0.89 A. Packing is quite different among crystal forms but lattice interactions appear to play little role in the conformation of the molecule. Greatest variations in mean position are for those residues that also exhibit the greatest thermal motion. Crystal contacts in all crystals are mediated almost exclusively by hydrophilic side chains, and three to six intermolecular salt bridges per protein subunit are present in each case.

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Related Citations: 

• The Three-Dimensional Structure of Canavalin from Jack Bean (Canavalia Ensiformis)
  Ko, T-P.,Ng, J.D.,Day, J.,McPherson, A.
  (1993) Plant Physiol. 101: 729




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Organizational Affiliation: 

Department of Biochemistry, University of California, Riverside 92521, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
CANAVALIN	A	181	Canavalia ensiformis	Mutation(s): 0
Find proteins for P50477 (Canavalia ensiformis) Go to UniProtKB:  P50477

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
CANAVALIN	B	184	Canavalia ensiformis	Mutation(s): 0
Find proteins for P50477 (Canavalia ensiformis) Go to UniProtKB:  P50477

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• Space Group: P 2₁ 3

Unit Cell:

Length (Å)	Angle (°)
a = 106.000	α = 90.00
b = 106.000	β = 90.00
c = 106.000	γ = 90.00

Software Package:

Software Name	Purpose
TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-07-08 
• Released Date: 1993-10-31 
• Deposition Author(s): Ko, T-P., Ng, J.D., Day, J., Greenwood, A., McPherson, A.

Revision History 

• Version 1.0: 1993-10-31
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Derived calculations, Version format compliance
• Version 1.3: 2013-12-04
  Type: Database references