2EFA

Neutron crystal structure of cubic insulin at pD6.6

• PDB DOI: https://doi.org/10.2210/pdb2EFA/pdb

• Classification: HORMONE/GROWTH FACTOR
• Organism(s): Sus scrofa
• Mutation(s): No 


• Deposited: 2007-02-22 Released: 2008-01-22 
• Deposition Author(s): Ishikawa, T., Tanaka, I., Niimura, N.

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Experimental Data Snapshot

• Method: NEUTRON DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.291 
• R-Value Work: 0.216 

Literature

A neutron crystallographic analysis of a cubic porcine insulin at pD 6.6

Ishikawa, T., Chatake, T., Ohnishi, Y., Tanaka, I., Kurihara, K., Kuroki, R., Niimura, N.

(2008) Chem Phys 345: 152-158

• DOI: https://doi.org/10.1016/j.chemphys.2007.06.053

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 5.79 kDa 
• Atom Count: 442 
• Modelled Residue Count: 51 
• Deposited Residue Count: 51 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin	A	21	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P01315 (Sus scrofa) Explore P01315  Go to UniProtKB:  P01315

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin	B	30	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P01315 (Sus scrofa) Explore P01315  Go to UniProtKB:  P01315

Experimental Data & Validation

Experimental Data

• Method: NEUTRON DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.291 
• R-Value Work: 0.216 
• Space Group: I 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.035	α = 90
b = 79.035	β = 90
c = 79.035	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
CNS	refinement
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-01-22 
Deposition Author(s): Ishikawa, T., Tanaka, I., Niimura, N.

Revision History  

• Version 1.0: 2008-01-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Derived calculations, Version format compliance
• Version 1.2: 2013-08-21
  Changes: Database references
• Version 1.3: 2018-03-07
  Changes: Data collection
• Version 1.4: 2023-10-25
  Changes: Data collection, Database references, Refinement description