Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 50.58 kDa 
• Atom Count: 3875 
• Modelled Residue Count: 436 
• Deposited Residue Count: 436 
• Unique protein chains: 1

1MSA

MANNOSE-SPECIFIC AGGLUTININ (LECTIN) FROM SNOWDROP (GALANTHUS NIVALIS) BULBS COMPLEXED WITH METHYL-ALPHA-D-MANNOSIDE

• DOI: 10.2210/pdb1MSA/pdb

• Classification: LECTIN (AGGLUTININ)
• Organism(s): Galanthus nivalis
• Mutation(s): No 


• Deposited: 1995-03-06 Released: 1995-09-15 
• Deposition Author(s): Wright, C.S., Hester, G.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.29 Å
• R-Value Free: 0.240 
• R-Value Work: 0.177 
• R-Value Observed: 0.177 

Literature

Structure of mannose-specific snowdrop (Galanthus nivalis) lectin is representative of a new plant lectin family.

Hester, G., Kaku, H., Goldstein, I.J., Wright, C.S.

(1995) Nat Struct Biol 2: 472-479

• PubMed: 7664110 
• DOI: 10.1038/nsb0695-472
• Primary Citation of Related Structures:  
  1MSA


• PubMed Abstract: 
  

Tetrameric Galanthus nivalis agglutinin (50,000 M(r)) belongs to a super-family of alpha-D-mannose-specific plant bulb lectins known to be potent inhibitors of retroviruses. The 2.3 A crystal structure of this lectin complexed with methyl alpha-D-mannose reveals a novel three-fold symmetric beta-sheet polypeptide fold. Three antiparallel four-stranded beta-sheets, each with a conserved mannose-binding site, are arranged as a 12-stranded beta-barrel. The tetramer displays 222 symmetry. Pairs of monomers form stable dimers through C-terminal strand exchange. The so formed hybrid beta-sheets are the sites for high affinity mannose binding in the dimer interface. Occupancy observed at corresponding sites in other beta-sheets suggests a potential for twelve sites per tetramer.

---

Related Citations: 

• Biosynthesis, Primary Structure and Molecular Cloning of Snowdrop (Galanthus Nivalis) Lectin
  Van Damme, E.J.M., Kaku, H., Perini, F., Goldstein, I.J., Peeters, B., Yagi, F., Decock, B., Peumans, W.J.
  (1991) Eur J Biochem 202: 23

• Crystallization and Preliminary X-Ray Diffraction Results of Snowdrop (Galanthus Nivalis) Lectin
  Wright, C.S., Kaku, H., Goldstein, I.J.
  (1990) J Biol Chem 265: 1676

---

Organizational Affiliation: 

Department of Biochemistry, Virginia Commonwealth University, Richmond 23298, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AGGLUTININ	A, B, C, D	109	Galanthus nivalis	Mutation(s): 0
Find proteins for P30617 (Galanthus nivalis) Explore P30617  Go to UniProtKB:  P30617

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MMA	A, B, C, D	methyl alpha-D-mannopyranoside C7 H14 O6 HOVAGTYPODGVJG-VEIUFWFVSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.29 Å
• R-Value Free: 0.240 
• R-Value Work: 0.177 
• R-Value Observed: 0.177 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 138.82	α = 90
b = 64.11	β = 90
c = 62.08	γ = 90

Software Package:

Software Name	Purpose
SOFTWARE	data collection
X-PLOR	model building
X-PLOR	refinement
SOFTWARE	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-03-06 
• Released Date: 1995-09-15 
Deposition Author(s): Wright, C.S., Hester, G.

Revision History  

• Version 1.0: 1995-09-15
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary