1GCN | pdb_00001gcn

X-RAY ANALYSIS OF GLUCAGON AND ITS RELATIONSHIP TO RECEPTOR BINDING

• PDB DOI: https://doi.org/10.2210/pdb1GCN/pdb

• Classification: HORMONE
• Organism(s): Sus scrofa
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 1977-10-17 Released: 1977-11-28 
• Deposition Author(s): Blundell, T.L., Sasaki, K., Dockerill, S., Tickle, I.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å

Literature

X-ray analysis of glucagon and its relationship to receptor binding.

Sasaki, K., Dockerill, S., Adamiak, D.A., Tickle, I.J., Blundell, T.

(1975) Nature 257: 751-757

• PubMed: 171582 
• DOI: https://doi.org/10.1038/257751a0
• Primary Citation Related Structures: 
  1GCN


• PubMed Abstract: 
  

  X-ray analysis of the pancreatic hormone glucagon shows that in crystals the polypeptide adopts a mainly helical conformation, which is stabilised by hydrophobic interactions between molecules related by threefold symmetry. A model is presented in which the glucagon molecule exists in dilute solutions as an equilibrium population of conformers with little retention of conformers with little retention of structure, and in which the helical conformation is stablised by hydrophobic interactions either as an oligomer or as a complex with the receptor.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 3.49 kDa 
• Atom Count: 246 
• Modeled Residue Count: 29 
• Deposited Residue Count: 29 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GLUCAGON	A	29	Sus scrofa	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P01274 (Sus scrofa) Explore P01274  Go to UniProtKB:  P01274

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å

Space Group: P 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.1	α = 90
b = 47.1	β = 90
c = 47.1	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1977-11-28 
Deposition Author(s): Blundell, T.L., Sasaki, K., Dockerill, S., Tickle, I.J.

Revision History  

• Version 1.0: 1977-11-28
  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: 2024-02-07
  Changes: Data collection, Database references, Other