Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 3.37 kDa 
• Atom Count: 240 
• Modelled Residue Count: 30 
• Deposited Residue Count: 30 
• Unique protein chains: 1

1HO0

NEW B-CHAIN MUTANT OF BOVINE INSULIN

• PDB DOI: 10.2210/pdb1HO0/pdb

• Classification: HORMONE/GROWTH FACTOR
• Mutation(s): Yes 


• Deposited: 2000-12-08 Released: 2000-12-20 
• Deposition Author(s): Dupradeau, F.Y., Richard, T., Le Flem, G., Oulyadi, H., Prigent, Y., Monti, J.P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 21 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 

Literature

A new B-chain mutant of insulin: comparison with the insulin crystal structure and role of sulfonate groups in the B-chain structure

Dupradeau, F.Y., Richard, T., Le Flem, G., Oulyadi, H., Prigent, Y., Monti, J.P.

(2002) J Pept Res 60: 56-64

• PubMed: 12081626 
• DOI: 10.1034/j.1399-3011.2002.02990.x
• Primary Citation of Related Structures:  
  1HO0


• PubMed Abstract: 
  

The solution structure of a new B-chain mutant of bovine insulin, in which the cysteines B7 and B19 are replaced by two serines, has been determined by circular dichroism, 2D-NMR and molecular modeling. This structure is compared with that of the oxidized B-chain of bovine insulin [Hawkins et al. (1995) Int. J. Peptide Protein Res.46, 424-433]. Circular dichroism spectroscopy showed in particular that a higher percentage of helical secondary structure for the B-chain mutant is estimated in trifluoroethanol solution in comparison with the oxidized B-chain. 2D-NMR experiments confirmed, among multiple conformations, that the B-chain mutant presents defined secondary structures such as a alpha-helix between residues B9 and B19, and a beta-turn between amino acids B20 and B23 in aqueous trifluoroethanol. The 3D structures, which are consistent with NMR data and were obtained using a simulated annealing protocol, showed that the tertiary structure of the B-chain mutant is better resolved and is more in agreement with the insulin crystal structure than the oxidized B-chain structure described by Hawkins et al. An explanation could be the presence of two sulfonate groups in the oxidized insulin B-chain. Either by their charges and/or their size, such chemical groups could play a destructuring effect and thus could favor peptide flexibility and conformational averaging. Thus, this study provides new insights on the folding of isolated B-chains.

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Organizational Affiliation: 

GRBPD, UPRES 2629, Faculté de Pharmacie et de Médecine, Amiens, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INSULIN	A	30	N/A	Mutation(s): 2
UniProt
Find proteins for P01317 (Bos taurus) Explore P01317  Go to UniProtKB:  P01317

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 21 
• Selection Criteria: structures with the least restraint violations, structures with the lowest energy 
• OLDERADO: 1HO0 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-12-08 
• Released Date: 2000-12-20 
Deposition Author(s): Dupradeau, F.Y., Richard, T., Le Flem, G., Oulyadi, H., Prigent, Y., Monti, J.P.

Revision History  

• Version 1.0: 2000-12-20
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-10-27
  Changes: Data collection, Database references, Derived calculations